STEIEL S507 Series Digital Instruments Instruction Manual

STEIEL S507 Series Digital Instruments

Product Information

Specifications

• Product Series: S507

• Types of Inputs: pH, Redox, Residual Chlorine, CAC (or CP)
  Cell, Standardized Input, Turbidity, Temperature

• Warranty: 12 months from delivery date

Product Usage Instructions

pH Input Specifications

Ensure proper electrical connections are made for the pH-meter. Follow the electrochemical calibration procedure as outlined in the manual.

Redox Input Specifications

Make correct electrical connections for the Redox meter. Perform electrochemical calibration according to the provided instructions.

Residual Chlorine Input Specifications

Connect the device electrically as specified for Residual Chlorine measurement. Calibrate the Chlorine input following the calibration guidelines.

CAC (or CP) Cell Input Specifications

Ensure proper electrical connections for the CAC (or CP) Cell. Calibration of the cell should be performed as described in the manual.

Standardized Input Specifications

Connect the device electrically for Standardized Input. Perform electrical calibration as instructed in the manual.

Turbidity Meter Specifications

Make electrical connections for the Turbidity Cell. Calibrate the Turbidity Meter using the provided calibration procedures.

Temperature Input Specifications

Connect the device electrically for Temperature Input. Calibrate the thermometer according to the calibration instructions.

FAQ

• Q: How long is the warranty period for the product?
  • A: The warranty period for all STEIEL products is 12 months from the delivery date.
• Q: What happens if I don’t follow the installation and maintenance instructions?
  • A: If the installation, maintenance, and usage instructions are not strictly followed, the warranty may be void, and the manufacturer may not be liable for damages or malfunctions.

WARNINGS

• This manual is dedicated to the technical personnel responsible of the installation, management, and maintenance of the plants. The manufacturer assumes no responsibility for damages or malfunctions occurring after intervention by non-authorized personnel, or not compliant with the prescribed instructions.
• Before performing any maintenance or repair action, ensure that the system is electrically and hydraulically insulated.
• Dispose of waste material and consumables accordingly with local regulations.

The manufacturer can modify the instrument or the technical manual without advanced notice.

Warranty

• All STEIEL products are warranted for a period of 12 months from the delivery date.
• The warranty is not valid if all instructions of installation, maintenance, and use, are not strictly followed by the user.
• Local regulations and applicable standards have also to be followed.

PACKING LIST

1. Controller
2. Technical manual
3. Ferrites (2 pieces, part number 5062.0020)

INTRODUCTION AND PRINCIPLE OF OPERATION

S507 is a series of digital, microprocessor-based instruments, designed for wall installation. All models feature an output configurable as “dosing-shot” for directly driving a dosing pump without electronic board. This function is very useful when the pump is installed in humid environments or in the presence of fumes, that may damage the electronic board. Moreover, the instruments are equipped with two output relays (settable as set-point or alarm), one current output galvanically insulated, and one serial port for PC communication (optional software). All outputs can be temporary disabled (for example for maintenance purpose) through the START/STOP button.

Errors and alarms are shown directly on the display, and configuration and calibration data are stored in the non-volatile memory for at least 10 years.

The S507 series includes several models for measuring the following parameters:

• pH/redox
• chlorine with open amperometric cell (CLE11 / CLE12)
• chlorine with CAC cell series
• conductivity (and resistivity)
• turbidity
• indicator (model with mA input)

All models feature an input for Pt100 temperature probe, for temperature measurement and compensation of pH, conductivity, and residual chlorine readings.

Common characteristics for all models

• Power Supply 230 V~ ±10% 50-60 Hz
  • (115 or 24 Vac ±10% 50-60 Hz, or 24 V- ±10% upon request)
• Power Consumption 7 VA max (models with relay output)
  • 70 VA (models with K1 configured as “dosing-shot”)
• Protections PTC fuse appropriate to the power supply voltage;
• If K1=dosing-shot and 230 V~ power supply, F 250 mA, 5×20 fuse
• Display 2-row, alphanumeric LCD (16 digits per row), with backlight
• Analogic Input precision better than 0.3% FS; repeatability better than 0.2% FS
• Temperature Input removable, 2-pole terminal block, for connection of Pt100 sensor (Pt1000 for oxygen meter or upon request)
• Digital Input 1 input IN OFF/FLW for disabling outputs; for voltage-free contact; 5 V voltage at terminals, current max 5 mA
  • 1 additional input AUX, available on special models
  • 1 TC (temperature control) input, internal input, available only for models with K1 configured as “dosing-shot”
• Relay Output 2 independent outputs on the removable, 5-pole terminal block; max load 250 V~, 3 A resistive
• Dosing-shot Output factory setting of K1 relay for directly driving of the pump magnet; standard pulse 300 V and 90 msec, max frequency 120 pulses/minute (not available for 24 V- or 24 V~ power supply versions)
• Current Output 0-20 or 4-20 mA (selectable through software), max load 600 W, err max 0.5% FS; galvanically insulated
• Serial Output RS232 port on removable, 4-pole terminal block (RS485 upon request)
• Environment storage temperature -20 to +60 °C operating temperature -10 to +50 °C RH max 90% non-condensing
• Casing ABS, water-tight housing, for wall installation with 4 screws
• Protection Rate IP66
• Dimensions 240 x 300 x h 120 mm; fixing template 220 x 185 mm
• Weight approx. 1.5 kg

Analogic Input, depending on model

• pH/redox Input removable, 4-pole terminal block (coaxial cable + reference);
• input impedance > 10^12 W
• Chlorine Input removable, 4-pole terminal block (copper/platinum electrodes + shield) for CLE11 / CLE12 cells
• CAC / CP Cell Input removable, 4-pole terminal block (power supply + signal)
• Conductivity/Resistivity input on removable terminal block for cell with 2 electrodes + shield
• Turbidity Meter Input removable terminal block for CTS07 cell;
• standard ranges up to 100 or 500 FTU Standardised Input removable, 4-pole terminal block (specify input type, range, and transducer power supply)

MECHANICAL DIMENSIONS

Note: all dimensions are in mm.

KEYBOARD, LED AND DISPLAY

• START/STOP key Enable / disable all outputs (relays, pump magnet, mA output)
• CAL/MENU key Allow to enter configuration and calibration modes
• [+] key While in normal mode, show the “GAIN” value (amplification factor); in calibration mode increase the displayed value
• [-] key While in normal mode, show the “OFFSET” value (deviation from zero); in calibration mode decrease the displayed value
• NEXT key While in normal mode, toggle between main measure and temperature readings; in calibration mode exit without saving the new calibration data
• LED K1 LED ON = K1 relay ON = contact closed
• LED K2 LED ON = K2 relay ON = contact closed
• LED ON Light ON (fix) means instrument ON and no anomalies; blinking light indicates malfunction or outputs disabled through the START/STOP button
• Display
  • The side figure shows a typical visualization of the display. The temperature value is shown within brackets if corresponding to a value entered during configuration (parameter P04). Otherwise, if a Pt100 probe is connected, the measured temperature is displayed without brackets.

ELECTRICAL CONNECTIONS

For correct electrical connections always refer to the rear panel pad printing, specific for each model.
The above figure represents the pH/RX model version. The difference among different models is the input signal terminal block (pins 20 to 23), while the remaining connections are the same for all models.

• SUPPLY: connect to these terminals (1, 2, 3) the external power supply, accordingly with voltage technical specifications indicated on the instrument label; max tolerance ±10%; connect the terminal 3 to the grounding of the electric system. The instrument is equipped with an internal protection system, thanks to which it is not necessary to enforce any polarity in the case of DC power.
• OUT K1:
  • relay output: voltage-free contact, terminals 4 and 5.
  • dosing-shot configuration: connect the pump cable to these terminals as follows: brown wire to pin 4, blue wire to pin 5 and yellow/green wire to pin 6.
• OUT K2: relay output: voltage-free contact, terminals 7 and 8
• IN AUX: additional input (terminals 9 and 10), typically used for triggering automatic cleaning cycles.
• IN OFF/FLOW: digital input (terminals 11, 12, 13); when the contact is closed, outputs are disabled and the status is shown on the display; for simple contacts, use terminals 11 and 12; in case of input from 3-wire magnetic sensor (e.g. flow sensor on probe-holder), connect the input black wire to terminal 11, the negative blue wire to terminal 12, and the positive brown wire to terminal 13.
• OUT mA: current output, terminals 14 (positive) and 15 (negative)
• SERIAL OUTPUT: terminals 16 (+5V), 17 (TX), 18 (RX), 19 (GND); this output can be used for connecting a PC.
• MEASURE INPUT: terminals 20, 21, 22 and 23; for connections refer to the specific sections; the maximum cable length depends on the sensor type (20 m for pH or RX, 5 m for low conductivity measurements, 10 m for medium-high conductivity, 60 m for standardised inputs using shielded cables); perform wiring while keeping signal and power cables separated; if using cables with additional shield, connect the shield to the REF terminal (never short-circuit the grounding with REF terminal!).
• PT100: temperature input (terminals 24 and 25), for connecting a Pt100 probe (if a sensor with cable longer than 5 meters is required, it is recommended to use a 2-wire cable + shield; connect the shield to terminal 24).

Warning! Before performing any connection, check that the meter is not powered!

Notes:

• The maximum load for relay outputs is 3 A and 250 Vac resistive; with inductive load the maximum current is 1 A (with a 230 Vac power supply voltage it is possible to directly drive pumps or solenoid valves up to 200 VA).
• The output relay contacts are not protected: insert a fuse or other protection system appropriate for the load.
• In case of inductive load, the output should be protected with appropriate system for arc and interference suppression (RC nets or varistors in AC, diodes or varistors in DC).
• For models with K1 set as dosing-shot output, the correct operation is ensured only with the original pump cable (5 m); if cable elongation is needed, be sure to use a cable of the same section and locate it far from signal cables.

For a correct functioning of the device even in bad interference conditions, it is recommended to proceed as follows:

• a) insert one of the supplied ferrites on the power supply cable as shown in the below picture
• b) connect the shield of the signal cable to the grounding or to the REF terminal
• c) insert the second supplied ferrite on the input signal cable as shown in the below picture
• d) connect RC suppressors (or similar) in parallel with the load (properly dimensioned)
• e) check the correct grounding connection of the electric cabin that contains the instrument
• f) if the cable connected to the current output is longer than 20 meters, use shielded cable

Make one or two turns (depending on the cable section) around the ferrite.
Note: The instrument is supplied complete with two ferrites, one for the power supply cable and one for the input signal cable. In case of additional input (temperature) with cable separated from the main one, a third ferrite is needed. Contact your dealer.

START-UP

At start-up S507 performs a quick test of the display switching on all the segments, then shows the instrument/software version code, checks the memory status, and displays error or advice codes (if present). For details, see “ERRORS” section. After completing the start-up operations, the device enters the normal operating mode, displays mainmeasurement and temperature, and updates accordingly the current and relay outputs. If at start-up the [+] and [-] keys are pressed simultaneously, the device runs a simulation program: “0” is displayed and the LED ON blinks. This value simulates the measurement and can be adjusted with the [+] and [-] keys, for testing the functioning and configuration of the current and relay outputs. To exit the simulation mode, press NEXT.

CONFIGURATION

This section describes the operating procedure for configuring editable parameters from the keyboard.

1. Press and hold the CAL/MENU key for at least 2 seconds to enter the configuration / calibration mode.
2. Press NEXT to start the configuration.
3. Release NEXT and the display will show the first editable parameter.
4. Use the [+] / [-] keys to shift to the next / previous parameter or press CAL/MENU to move the cursor on the parameter value; modify the value with the [+] / [-] keys.
5. Press CAL/MENU to confirm the new value or NEXT to proceed without saving.
6. Now the display shows the next parameter.
7. Proceed as explained at steps 4 and 5 for setting all the parameters.
8. To exit the configuration mode, press NEXT.
9. If no key is pressed, after a few seconds the instrument will automatically quit configuration mode.

LIST OF PARAMETERS

It is recommended to fill the last column with the values set for your application

Model pH/RX/T, mA, chlorine, turbidity

PAR.| Description| Min value| Max value| Default| Set value
---|---|---|---|---|---
P01| Measure type| 0| 2| 0|
P02, P03| Reserved| 0.00| 0.00| 0.00|
P04| Working temperature| 0| 100| 25 °C|
P05| Driving frequency for automatic dosing- shot (K1 properly set)| 1.0| 120.0| 120.0

pul/min

|
P06| Driving frequency for manual dosing- shot (K1 properly set)| 0.0| 120.0| 60.0

pul/min

|
P07| Working mode for K1| 0| 5| 1|

P08

| Minimum threshold for K1 relay

(or proportional control start) (or flow time, in minutes)

| ****

-1000

| ****

2000

| ****

6.00 pH

|

P09

| Maximum threshold for K1 relay (or proportional control end)

(or reading time, in minutes)

| ****

-1000

| ****

2000

| ****

6.30 pH

|

P10

| Energizing delay for K1 relay

(or proportional control time) (or washing time, in minutes)

| ****

0

| ****

240

| ****

0 sec

|

P11

| De-energizing delay for K1 relay (or min TON/TOFF value)

(or pause time, in minutes)

| ****

0

| ****

240

| ****

0 sec

|
P12| Working mode for K2| 0| 6| 1|
P13| Minimum threshold for K2 relay

(or pause time for cleaning, minutes)

| -1000| 2000| 6.50 pH|
P14| Maximum threshold for K2 relay (or washing time, seconds)| -1000| 2000| 6.80 pH|

PAR.| Description| Min value| Max value| Default| Set value
---|---|---|---|---|---
P15| Energizing delay for K2 relay

(or hold time after cleaning, seconds)

| 0| 240| 0 sec|
P16| De-energizing relay for K2 relay| 0| 240| 0 sec|
P17| Starting delay| 0| 60| 0 min|
P18| mA output type| 0| 1| 1|
P19| Starting value for mA output| -1000| 2000| 0.00 pH|
P20| Full scale value for mA output| -1000| 2000| 14.00 pH|
P21| Fault mA value| 0.0| 21.0| 21.0 mA|
P22| RS485 address| 1| 9| 1|
P23| Password| 0| 999| 0|
P24| Language| 0| 3| 0|
P25| UR/OR functioning| 0| 7| 0|
P26| Minimum threshold for K3 alarm| -1000| 4000| -1.00 pH|
P27| Maximum threshold for K3 alarm| -1000| 4000| 15.00 pH|
P28| Triggering delay for K3 alarm| 0| 240| 0 min|
P29| Auto-set| 0| 100| 0|
(P30)| Starting value meas.1 (mA model only)| -1000| 2000| 0|
(P31)| Full scale value meas.1 (mA model only)| -1000| 2000| 2000|
(P32)| d.p. + m.u. for meas.1 (mA model only)| 0| 255| 0|

Conductivity meter version

PAR.| Description| Min value| Max value| Default| Set value
---|---|---|---|---|---
P01| Conductivity / resistivity range| 0| 48| 23|
P02| Temp. compensation coefficient| 0.00| 4.00| 2.00|
P03| Reference temperature| 0| 100| 25 °C|
P04| Working temperature| 0| 100| 25 °C|
P05| Driving frequency for automatic dosing- shot (K1 properly set)| 1.0| 120.0| 120.0

pul/min

|
P06| Driving frequency for manual dosing- shot (K1 properly set)| 0.0| 120.0| 60.0

pul/min

|
P07| Working mode for K1| 0| 5| 1|

P08

| Minimum threshold for K1 relay

(or proportional control start) (or flow time, in minutes)

| ****

-1000

| ****

2000

| ****

70.0 mS

|

P09

| Maximum threshold for K1 relay (or proportional control end)

(or reading time, in minutes)

| ****

-1000

| ****

2000

| ****

80.0 mS

|

P10

| Energizing delay for K1 relay

(or proportional control time) (or washing time, in minutes)

| ****

0

| ****

120

| ****

0 sec

|

P11

| De-energizing delay for K1 relay (or min TON/TOFF value)

(or pause time, in minutes)

| ****

0

| ****

120

| ****

0 sec

|
P12| Working mode for K2| 0| 4| 1|
P13| Minimum threshold for K2 relay

(or pause time for cleaning, minutes)

| -1000| 2000| 85.0 mS|
P14| Maximum threshold for K2 relay (or washing time, seconds)| -1000| 2000| 95.0 mS|
P15| Energizing delay for K2 relay

(or hold time after cleaning, seconds)

| 0| 120| 0 sec|
P16| De-energizing relay for K2 relay| 0| 120| 0 sec|
P17| Starting delay| 0| 60| 0 min|
P18| mA output type| 0| 1| 1|
PAR.| Description| Min value| Max value| Default| Set value
---|---|---|---|---|---
P19| Starting value for mA output| -1000| 2000| 00.0 mS|
P20| Full scale value for mA output| -1000| 2000| 199.9 mS|
P21| Fault mA value| 0.0| 21.0| 21.0 mA|
P22| RS485 address| 1| 9| 1|
P23| Password| 0| 999| 0|
P24| Language| 0| 3| 0|
P25| UR/OR functioning| 0| 7| 0|
P26| Minimum threshold for K3 alarm| -1000| 4000| -.50 µS|
P27| Maximum threshold for K3 alarm| -1000| 4000| 20.50 µS|
P28| Triggering delay for K3 alarm| 0| 240| 0 min|
P29| Auto-set| 0| 100| 0|

MEANING OF PARAMETERS

• P01 (pH / RX / T) MEASURE TYPE
  • This model configured and calibrated for pH, REDOX or temperature measurements, can be set as follows: 0 = pH-meter, 1 = REDOX meter, 2 = thermometer.
• P01 (conductivity) CONDUCTIVITY / RESISTIVITY RANGE
  • Set this parameter to choose the desired measurement range and cell constant

Cell constant (K)| Range| P01| Range| P01| Range| P01| Range| P01
---|---|---|---|---|---|---|---|---
K = 10 cm| 2 mS/cm| 1| 20 mS/cm| 2| 200 mS/cm| 3| 2000 mS/cm| 4
K = 1 cm| 20 mS/cm| 6| 200 mS/cm| 7| 2000 mS/cm| 8| 20 mS/cm| 9
K = 0.1 cm| 200 mS/cm| 11| 2000 mS/cm| 12| 20 mS/cm| 13| 200 mS/cm| 14
K = 0.01 cm| 2000 mS/cm| 16| 20 mS/cm| 17| 200 mS/cm| 18| 2000 mS/cm| 19
K = 5 cm| 2 mS/cm| 21| 20 mS/cm| 22| 200 mS/cm| 23| 2000 mS/cm| 24

If the visualization of a resistivity range is required, select the desired range:

Cell constant (K)| Range| P01| Range| P01| Range| P01| Range| P01
---|---|---|---|---|---|---|---|---
K = 10 cm| 99.9..0.5 MΩ| 25| 9.99..0.05 MΩ| 26| 999..5 KΩ| 27| 99.9..0.5 KΩ| 28
K = 1 cm| 9.99..0.05 MΩ| 30| 999..5 KΩ| 31| 99.9..0.5 KΩ| 32| 9.99..0.05 KΩ| 33
K = 0.1 cm| 999..5 KΩ| 35| 99.9..0.5 KΩ| 36| 9.99..0.05 KΩ| 37| 999..5 Ω| 38
K = 0.01 cm| 99.9..0.5 KΩ| 40| 9.99..0.05 KΩ| 41| 999..5 Ω| 42| 99.9..0.5 Ω| 43
K = 5 cm| 99.9..0.5 MΩ| 45| 9.99..0.05 MΩ| 46| 999..5 KΩ| 47| 99.9..0.5 KΩ| 48

Resistivity is calculated as the reciprocal of conductivity, according to the formula: R = 1/C. To minimize the significant fluctuations of resistivity values correspondent to conductivity measurements around the beginning of the range, the resolution of resistivity measurements has been lowered to 999 points, equal to the lowest conductivity resolution (2000 points). In fact, a small fluctuation in the values of conductivity (from 0.1 to 0.3 μS / cm) would result in a fluctuation from 10.000 to 3.333 MΩ in resistivity readings.
If the parameter is set to a value not included in the above table, the instrument will not function correctly.

• P01 (mA input) MEASURE TYPE
• P01=0 set the analogue input at 0-20 mA; P01=1 set the analogue input at a 4-20 mA.
• P01 (chlorine) MEASURE TYPE

In the case of chlorine measurement with CAC cell and low range (1 ppm), this parameter allows to select the measurement resolution:

• P01=0  standard range, 0.00 to 1.00 ppm (2 decimal places)
• P01=1  sensitive range, 0.000 to 1.000 ppm (3 decimal places), option reserved to expert users and to be used only for low chlorine levels.

This configuration also allows to restrict the proportional regulation up to 0.025 ppm at the 4-20 mA output.

• P02 (pH / RX / T, mA, chlorine) Reserved parameter, for future use.
• P02 (conductivity) TEMP. COMPENSATION COEFFICIENT aT
• S507 performs the temperature compensation accordingly with the following equation:
• where: t = measured (or set) temperature, °C
• tref = reference temperature, °C (typically set at 25°C, parameter P03)
• aT = temperature compensation coefficient, %/°C (parameter P02)

Typical aT values: 1.0 to 1.6 %/°C for acid solutions

• 1.8 to 2.2 %/°C for alkaline solution
• 2.2 to 3.0 %/°C for salt solution
• approx. 2.0 %/°C for water

Anyway, the aT coefficient is not constant over all the standard temperature compensation range, but only for small temperature variations (e.g., 20 to 50°C).

• Set aT = 0 means disabling the temperature compensation feature.

If the aT value is unknown, it may be determined as follows:

1. set aT (P02) = 0.00 (no temperature compensation)
2. read the conductivity value of the tested liquid at the reference temperature (e.g., 25°C)
3. bring the liquid at the working temperature
4. read the conductivity value at this temperature
5. calculate the aT (P02) value with the below equation:
6. set the P02 parameter with the calculated value

• P03 (pH / RX / T, mA, chlorine) Reserved parameter, for future use.
• P03 (conductivity) REFERENCE TEMPERATURE

See description of parameter P02.

P04 WORKING TEMPERATURE

All the S507 models are designed for measuring temperature and use this value for temperature compensation (when required). If no temperature probe is connected, the working temperature value can be manually entered. In this case the set value is displayed within brackets.

P05 AUTOMATIC INJECTION FREQUENCY

This parameter is editable only when the K1 output is set as dosing-shot and allows to entry the maximum number of injections per minute reached by the output while working in ON-OFF automatic mode (P07=1 or P07=2), or by the pump while working in proportional automatic mode (P07=3 or P07=4); the typical value is 120 injections/minute.

P06 MANUAL INJECTION FREQUENCY

If the K1 output is configured as dosing-shot, the pump can be started manually accordingly with the number of injections per minute set through this parameter.

P07 WORKING MODE OF RELAY K1

The K1 relay output cam work in 6 different modes:

• 0 = Relay output is disabled; manual working mode for dosing-shot.
• 1 = Relay contact is closed, or pump is started (dosing-shot) when the set thresholds are exceeded.
• 2 = Contact is open, or pump is stopped (dosing-shot setting) when the set thresholds are exceeded.
• 3 = Upwards proportional control (dosage increases as measurement value increases); the K1 relay energizing time is small (or zero) if measurement is below the minimum threshold (P08), and increases gradually up to its maximum (or always ON) when the maximum threshold (P09) is exceeded; in case of dosing-shot output, K1 is off if measurement is below the minimum threshold (P08), then starts to pulse slowly till the maximum injection frequency (P05) when the maximum threshold value (P09) is reached. This mode allows a gradual reagent injection and avoids big rushes.
• 4 = Downwards proportional control (dosage decreases as measurement value increases); the K1 relay energizing time is at its maximum (or always ON if measurement is below the minimum threshold (P08), and decreases gradually to its minimum (or always OFF) when the maximum threshold (P09) is exceeded; in case of dosing-shot output, there are no injections if measurement exceeds the maximum threshold (P09), then injections frequency increases as measurement decreases, till the maximum frequency (P05) when the minimum threshold value (P08) is reached.
• 5 = Timed measure and auto-cleaning cycle, including flow phase. This kind of working mode allows to save sensor life when measuring aggressive liquids, by limiting the contact time to the sole reading period.

The working cycle starts with the activation of the solenoid valve connected to the relay K1, which controls the flow of the liquid to be measured towards the sensor. It then waits for a time called “flow time” (P08), which ensures that the liquid reaches the sensor. At this point the measurement is taken for a period specified (time P09). After the reading, the measure is frozen, the relay K1 de-energizes and activates the relay K2, which is connected to the solenoid valve that allows clean water (or detergent) to pass for washing the sensor. Once the washing time (P10) finishes, K2 de-energizes and the system remains frozen for the pause time (P11). Then the cycle repeats. When the system stops, the current output assumes the fault value set in parameter P21 and the contact “IN AUX” is closed (if used), by triggering a wash. If the cycle is in the flow or reading process, that stage is stopped immediately, and a wash is performed. Then the operation will remain locked until the installation is restarted with subsequent deactivation of the “IN AUX” input. All times regulating the timed cycle are set by the operator (see next parameters).
Note: When P07 is set to 5, to perform an electrochemical calibration the cycle must be stopped temporarily by holding the NEXT key for 2 seconds. The stage in process is suspended, measure is de-frozen, energized relays deactivate and the “ON” LED blinks (5 quick flashes and one 1- second pause). Once the calibration is completed, to reactivate the cycle press again the NEXT button for 2 seconds.

Note: Since both relays of the unit are used for the timed cycle, control may be performed through the current output or the serial line.
The diagram shows the functioning of the timed measure and auto-clean cycle, with flow stage:

P08 MIN THRESHOLD FOR RELAY K1

Minimum threshold value for relay K1 action.
If P07=5, this parameter allows to set the flow time (minutes).

P09 MAX THRESHOLD FOR RELAY K1

Maximum threshold value for relay K1 action.
If P07=5, this parameter allows to set the reading time (minutes).

P10 ENERGIZING DELAY FOR RELAY K1

This parameter allows to enter a delay time (in seconds) for energizing relay K1 if it is configured with working type option 1 or 2. Entering zero will skip delay and the relay is activated immediately In case of proportional control (PWM), this parameter is used to enter the period (base time), in seconds. If P07=5, this parameter allows to set the washing time (minutes).

P11 DE-ENERGIZING DELAY FOR RELAY K1

This parameter allows to enter a delay time (in seconds) for de-energizing relay K1 if it is configured with working type option 1 or 2. Entering zero will skip delay and the relay is de-activated immediately. In case of proportional control (PWM), this parameter is used to enter the minimum ON and OFF time, in seconds.

If P07=5, this parameter allows to set the pause time (minutes) between two subsequent cycles.

Some notes about proportional control

For a better understanding of proportional control, refer to the below table

| Upwards Proportional Control| Downwards Proportional Control
---|---|---
Configuration

è

| (P07) Control type K1 = 3 (P08) Min. threshold K1 = 500 (P09) Max. threshold K1 = 700 (P10) Period = 120 seconds

(P11) Min. ON-OFF time = 0 seconds

| (P07) Control type K1 = 4 (P08) Min. threshold K1 = 500 (P09) Max. threshold K1 = 700 (P10) Period = 120 seconds

(P11) Min. ON-OFF time = 0 seconds

Measure| T ON| TOFF| Control| T ON| TOFF| Control
<= 500| 0 sec| 120 sec| 0 %| 120 sec| 0 sec| 100 %
520| 12 sec| 108 sec| 10 %| 108 sec| 12 sec| 90 %
540| 24 sec| 96 sec| 20 %| 96 sec| 24 sec| 80 %
550| 30 sec| 90 sec| 25 %| 90 sec| 30 sec| 75 %
600| 60 sec| 60 sec| 50 %| 60 sec| 60 sec| 50 %
650| 90 sec| 30 sec| 75 %| 30 sec| 90 sec| 25 %

= 700| 120 sec| 0 sec| 100 %| 0 sec| 120 sec| 0 %

For a correct functioning, set properly the parameters, accordingly with the following prescriptions:

• a) The difference between the maximum and minimum thresholds should be greater than 31 points.
• b) The minimum control time (P10 – P11) should be greater than 5 seconds.
• c) The period (base time) should be set accordingly with the control device (e.g., electro-valve: 10-20 seconds; electromagnetic dosing pump: 120-360 seconds; induction motor: > 600 seconds, etc.); it is recommended to ask an expert technician for setting the minimum ON-OFF time, to avoid any damage to the controller.
• d) The difference between the maximum and minimum thresholds should be greater than 31 points, even for proportional control through current output (see parameters P19 and P20 for details).

P12 WORKING MODE OF RELAY K2

The K2 relay output cam work in 7 different modes:

• 0 = Relay disabled.
• 1 = Contact is closed when the set thresholds are exceeded.
• 2 = Contact is open when the set thresholds are exceeded.
• 3 = NC (normally closed) alarm, i.e., K2 contact is closed when the measurement is within the set thresholds (P12 e P13).
• 4 = NO (normally open) alarm, i.e., K2 contact is open when the measurement is within the set thresholds (P12 e P13).
• 5 = Automatic cleaning cycle: at set time intervals, the instrument freezes measurement and energized relay K2 (to this relay is connected for example a solenoid valve for injecting detergent) for a set time. The relay is, therefore, de-activated and measurement is hold till the washing cycle is in progress, then the instrument returns to normal working mode. All working times for the cleaning cycle are set by the user (see following parameters for details). While the cleaning cycle is running, the “AUC” message blinks on the display.
• 6 = Automatic cleaning cycle synchronized with the “IN AUX” contact. The cycle is the same as described in the previous mode, but the operation is triggered by the dedicated input.

Warning! If P07=5 (K1 configured for measure and auto-clean cycle with flow), this parameter and the following 4 ones (P12…P16).

The below diagrams show the functioning of the two automatic cleaning modes.

P13 MIN THRESHOLD FOR RELAY K2

Minimum threshold value for relay K2 action. If P12=5 (cleaning cycle), this parameter is used to set the pause time (minutes) between two subsequent cleaning cycles.

P14 MIN THRESHOLD FOR RELAY K2

Maximum threshold value for relay K2 action. If P12=5 (cleaning cycle), this parameter is used to set the cleaning time (seconds).

P15 ENERGIZING DELAY FOR RELAY K2

Energizing delay for relay K2; the value is intended in seconds for ON-OFF controller (P12=1 or 2), or in minutes for K2 configured as alarm relay (P12=3 or 4). In case of cleaning cycle (P12=5 or 6), this parameter is used to set the time (seconds) with frozen measurement after the cleaning cycle has been completed, before returning to normal operations.

P16 DE-ENERGIZING DELAY FOR RELAY K2

De-energizing delay for relay K2; the value is intended in seconds for ON-OFF controller (P12=1 or 2), or in minutes for K2 configured as alarm relay (P12=3 or 4).

P17 STARTING DELAY

The sensor connected to the measured input may require a stabilization time before measuring reliable values, but anyway outputs are activated accordingly with readings. This parameter allows to enter a proper time delay (minutes), for waiting for sensor stabilization. Setting the parameter to zero means disabling this function.

P18 CURRENT OUTPUT TYPE

This parameter allows to choose the current output range:

• 0 = 0-20 mA; 1 = 4-20 mA.

Note: The precision for the current output refers to values greater than 0.3 mA (approx.). Note that the low values for the 0-20 mA output are quite approximate.

P19 STARTING VALUE FOR CURRENT OUTPUT

Measure value corresponding to the starting value of the current output (0 or4 mA).

P20 FULL-SCALE VALUE FOR CURRENT OUTPUT

Measure value corresponding to the full scale of the current output (20 mA).

P21 FAULT CURRENT OUTPUT

This parameter is used to enter the output current value when an error occurs (e.g., reading out of range, measurement disabled, ON key pressed, etc.).

P22 RS485 ADDRESS

This parameter is used only for special models featuring an RS485 port and identifies each device with a unique address for being recognized within an RS485 network, including several S507 controllers and a PC with proper management software.

P23 PASSWORD

The user can enter a protection password to avoid intervention by non- authorized personnel.

Warning! If the password is forgotten, the instrument must be sent back to the factory for a complete re-configuration!

P24 LANGUAGE

This parameter allows to choose the menu language among the following options:

• 0 = Italian, 1 = English, 2 = Spanish, 3 = French.

P25 UR/OR FUNCTIONING

If the input signal is too low or too high, the instrument recognizes an out- of-range status: the display shows the related error message, K1 and K2 outputs are disabled, and the current output provides the fault mA value set through the parameter P21. This is the functioning mode recommended by the manufacturer and factory set, that corresponds to the zero value of this parameter. For some applications it may be requested to hide this malfunction, for example by deactivating the error message on display and/or leaving unchanged the output status. To enter the desired combination, note the following: relay = value 1; mA output = value 2; error visualization = value 4. Add the values corresponding to the desired options and enter the result for setting this parameter. For example, if you want to see the error message and leave unchanged the relay and mA outputs status, set P25 = 1+2 = 3.

P26 MINIMUM THRESHOLD FOR K3 ALARM

The instrument internally features an alarm “virtual” relay (K3), that operates according to the user setting of parameters P26, P27 and P28. The parameter P26 allows to set the minimum threshold below which the measurement should never fall. If measurement falls below the set minimum, this alarm occurs and simultaneously all outputs are de-activated, and a fault current (value set in P21) is generated at the current output. The display shows the message “Alarm K3 Plant Fault” alternating to the measurement.

P27 MAXIMUM THRESHOLD FOR K3 ALARM

The parameter P27 allows to set the maximum threshold that should never be exceeded by the measurement. If measurement exceeds the set maximum, this alarm occurs and simultaneously all outputs are de-activated, and a fault current (value set in P21) is generated at the current output. The display shows the message “Alarm K3 Plant Fault” alternating to the measurement. If this alarm is not needed, simply enter a minimum threshold certainly less than the minimum possible measurement (e.g., pH = -1.00) and a maximum threshold definitely higher than the full-scale value (e.g. pH = 15.00).

P28 TRIGGERING DELAY FOR K3 ALARM

This parameter is used to set a triggering delay for the K3 alarm, to avoid undesired alarms due for example to noise or small temporary fluctuations of measurement. This delay is set in minutes.

P29 AUTO SET

This parameter allows to restoration the factory settings. Enter “12” and the display will show the “Autoset done!” message for 3 seconds, then the device returns to normal operating mode.

(P30) STARTING VALUE FOR MEASURE 1

This parameter is available only for model with mA input and represents the value corresponding to 0 or 4 mA, depending on the output type set. The parameter is factory set accordingly with customer indications and should not be modified!

(P31) FULL SCALE VALUE FOR MEASURE 1

This parameter is available only for model with mA input and represents the value corresponding to the full scale (20 mA). The parameter is factory set accordingly with customer indications and should not be modified!

(P32) DECIMAL POINT AND MEASURE UNIT FOR MEAS. 1

This parameter is available only for model with mA input, and is used to set the decimal point position and the measure unit, accordingly with the available options (see table) and the following formula:

P32 = (measure unit code x 8) + decimal point position

Examples:

• Range 0.000 to 1.234 m
  • P30 = 0, P31 = 1234, P32 = (17 x 8) + 3 = 139
• Range -10 to 1500 Volt
  • P30 = -10, P31 = 1500, P32 = (13 x 8) + 0 = 104
• Range 0 to 100.0 NTU
  • P30 = 0, P31 = 1000, P32 = (19 x 8) + 1 = 153

The parameter is factory set accordingly with customer indications and should not be modified!

CONTROL EXAMPLES

This section includes some configuration examples of control parameters:

1. Acidification control to have approximately pH 7.40

   • MEASURE TYPE = 0 (pH meter) (P01 = 0)

   • WORKING MODE FOR K1 = 1 (closed when thresholds are exceeded) (P07 = 1)
     It is recommended to set a narrow threshold window, e.g.:

   • MIN THRESHOLD = 7.30 pH (P08 = 7.30pH)

   • MAX THRESHOLD = 7.50 pH (P09 = 7.50pH)

   • The relay K1 starts acidification when the pH level is greater than 7.50 and de-activates as soon as the pH level falls below the 7.30 threshold.

   • The relay K2 can be configured as alarm:

   • WORKING MODE FOR K2 = 3 (NC alarm) (P12 = 3)

   • MIN THRESHOLD = 6.50 pH (P13 = 6.50pH)

   • MAX THRESHOLD = 8.50 pH (P14 = 8.50pH)

2. Conductivity control of water exiting from a demineralization plant, and alarm signal (or triggering of a resin regeneration cycle) if measurement is greater than 12.00 mS/cm

   • CONDUCTIVITY METER TYPE = 22 (19.99 mS/cm, K=5cm) (P01 = 22)
   • WORKING MODE FOR K1 = 1 (closed when thresholds are exceeded) (P07 = 1)
   • MIN THRESHOLD = 12.00 mS/cm (P08 = 12.00mS/cm)
   • MAX THRESHOLD = 12.00 mS/cm (P09 = 12.00mS/cm)
   • ENERGIZING DELAY = 60 sec (P10 = 60 sec)
   • DE-ENERGIZING DELAY = 0 sec (P11 = 0 sec)

The relay K1 is activated (and alarm is generated, or the regeneration cycle is triggered) when measured conductivity is greater than 12.00 mS/cm, and the value is kept for at least one minute (60 sec). This delay avoids erroneous actions due to instantaneous peaks or signal noise

ADDITIONAL VISUALIZATIONS

Pressing the [+] and [-] keys while in normal mode, the following values are displayed:

• pH meter key [+] gain factor (0.667 to 1.428)
  • key [-] offset, pH units at 25°C (-1.50 to 1.50)
• redox meter key [+] gain factor (1.000 – fix)
  • key [-] offset (-150 to 150 mV)
• thermometer key [+] gain factor (0.900 to 1.100)
  • key [-] offset (-5.0 to +5.0°C)
• conductivity meter key [+] gain factor (0.750 to 1.500)
  • key [-] offset (-100 to 100 points)
• residual chlorine key [+] gain factor (0.050 … 2.000)
  • key [-] offset (-5.00 to 5.00 mA)
• std. input key [+] gain factor (0.500 to 2.000)
  • key [-] offset (-200 to 200 points)
• CAC / CP cell key [+] gain factor (0.500 to 2.000)
  • key [-] offset (-200 to 200 points)

Note: The first calibration settings are OFFSET = 0, GAIN = 1.000.

Pressing the [+] and [-] keys simultaneously, the display shows the ON-OFF time for relay K1 set for proportional control

TEMPERATURE COMPENSATION

The temperature compensation (for pH, conductivity, and residual chlorine measurements) is calculated using the temperature measured through the proper input. If the input is not connected, the S507 device uses the working temperature set in the P04 parameter.

ERRORS

When an error is detected (including START/STOP key pressed), the LED ON starts blinking, the mA output provides the fault current value set in P21, and the display shows the corresponding error message, as listed here below:

WARNING 1 – RELAY K1 DISABLED

No working mode has been configured for K1 output, but the instrument works normally.

WARNING 2 – RELAY K2 DISABLED

No working mode has been configured for K2 output, but the instrument works normally.

ERR. 1 PROPORTIONAL CONTROL

The maximum and minimum threshold values for K1 proportional control (P08 and P09) aretoo close. The K1 control will not work correctly. Enter new values for parameters P08 and P09.

ERR. 2 CURRENT OUTPUT

• The maximum and minimum threshold values for the mA output (P19 and P20) are too close.
• The current output will not work correctly. Enter new values for parameters P19 and P20.

ERR. 3 CONDUCTIVITY RANGE

Bad configuration of the conductivity range. Enter new value for parameter P01.

CALIBRATION ERROR!

The requested calibration cannot be performed. Check probe and connection cable; repeat the procedure.

OFF CONTACT LEVEL OR FLOW

• The input contact at terminals 11 and 12 is closed, and the device does not work (outputs disabled). Check the sensor connected to the contact.
• If K1 output is set as dosing-shot, this error refers to the level of liquid to be injected; restore the level.
• If K1 is a relay output, this error indicates an external request of output disabling.

HOLD MEASURE CONTACT

The input contact at terminals 9 and 10 is closed, and measurements are frozen (the device is in stand-by). DOSING-SHOT OVERHEATING (only for K1 configured as dosing-shot) The temperature control indicates an overheating of the pump magnet, and outputs are disabled; wait for the magnet cooling down to an acceptable temperature.

UR/OR

Under Range / Over Range: the input signal is outside (under or over) the measurement range. Check sensor and cable. When this error occurs, all the instrument outputs (relays and mA) are disabled, if not otherwise configured through parameter P25.

ALARM K3 – PLANT FAULT

This alarm is generated when the input signal exceeds the maximum threshold or falls below the minimum value set at parameters P26 and P27 and remains outside these limits for a time longer than the delay set in P28.
Verify the proper operation of the instrument / dosing system installation, i.e.:

• a) Check measure sensor and connection cable: if damaged, exhausted, or broken, they could cause a fixed reading on the display. For example, a depleted CAC (or CP) cell or a dirty amperometric cell generate a zero signal. A pH cable short-circuited or in dispersion, gives an indication around 7pH.
• b) Dosing pump or dosing system: the instrument requests to dose chemical to reach the threshold, but the dosing device does not add enough product.

pH INPUT SPECIFICATIONS

ELECTRICAL CONNECTIONS FOR pH-METER

The signal comes from the electrode through a coaxial cable, with maximum recommended length of 20 meters (for longer cables, please contact the manufacturer). The electrode input is on the removable terminal block: connect the coaxial cable core to terminal 22, and the shield to terminal 23 (Note: remove any black conductive plastic between the core and shield of the cable). If two separate electrodes are used for measure and reference, connect the reference electrode to terminal 21 (REF). The Pt100 temperature sensor should be connected to terminals 24 and 25. If no sensor is connected, the instrument uses a constant temperature of 25.0°C. If a Pt100 probe is used, immerse it into the liquid to be tested, close to the electrode or any way at the same temperature. If a 3-wire Pt100 sensor is used, connect the 2 wires of the same colour at the same terminal (the wires are internally short-circuited). It is recommended to keep signal cables away from power cables.

ELECTROCHEMICAL CALIBRATION OF pH-METER

Before starting this procedure, ensure to have fresh buffer solutions (not expired). If temperature compensation is used, immerse the Pt100 probe into the buffer solutions together with the measuring electrode.

1. Rinse the electrode with distilled water and immerse it in pH 7.01 buffer solution.
2. Press and hold CAL/MENU for at least 2 seconds to enter the calibration mode.
3. Press [-] and the OFFSET message is displayed; release the button and the display will show the buffer pH value, automatically recognized.
4. If necessary, adjust the value using the [+] or [-] key.
5. Confirm calibration by pressing CAL, or press NEXT to exit without saving (the previous calibration data are kept)
6. Rinse the electrode with distilled water and immerse it in pH 4.01 (or pH 9.01) buffer solution.
7. Press and hold CAL/MENU for at least 2 seconds to enter the calibration mode.
8. Press [+] and the GAIN message is displayed; release the button and the display will show the buffer pH value, automatically recognized.
9. If necessary, adjust the value using the [+] or [-] key.
10. Confirm calibration by pressing CAL/MENU or press NEXT to exit without saving (the previous calibration data are kept).

The instrument does not automatically recognize the buffer pH values whenever:

• a) The buffer solution is contaminated dirty or expired
• b) The electrode is not working properly, or it is exhausted
• c) The electrode connection cable is damaged

Note: If you attempt to calibrate the offset at a pH value too different from pH 7, or to calibrate the gain with a buffer solution too close to pH neutrality, the instrument shows the “CALIBRATION ERROR!” message and does not save the calibration data.

REDOX INPUT SPECIFICATIONS

ELECTRICAL CONNECTIONS FOR REDOX METER

The signal comes from the electrode through a coaxial cable, with maximum recommended length of 20 meters (for longer cables, please contact the manufacturer). The electrode input is on removable terminal block: connect the coaxial cable core to terminal 22, and the shield to terminal 23 (Note: remove any black conductive plastic between the core and shield of the cable). If two separate electrodes are used for measure and reference, connect the reference electrode to terminal 21 (REF). If temperature measurement is also required, connect a Pt100 temperature sensor to terminals 24 and 25. If a 3-wire Pt100 sensor is used, connect the 2 wires of the same colour at the same terminal (the wires are internally short circuited). It is recommended to keep signal cables away from power cables.

ELECTROCHEMICAL CALIBRATION OF REDOX METER

Before starting the procedure, check to have a fresh calibration solution (not expired).

1. Rinse the electrode with distilled water.
2. Immerse the electrode into the calibration solution (e.g., 230 mV)
3. Press and hold CAL/MENU for at least 2 seconds, to enter the calibration mode.
4. Press [-] and the OFFSET message is displayed; release the button and the display will show the current measure.
5. If necessary, adjust the value using the [+] or [-] key.
6. Confirm calibration by pressing CAL/MENU, or press NEXT to exit without saving (the previous calibration data are kept)

After performing the calibration, the meter does not display the standard solution value whenever:

• a) The calibration solution is contaminated dirty or expired
• b) The electrode is not working properly, or it is exhausted
• c) The electrode connection cable is damaged

Note: If you attempt to calibrate the offset at a value too different from the internal one, the instrument shows the “CALIBRATION ERROR!” message and does not save the calibration data.
Redox calibration is a single point procedure (offset)!

RESIDUAL CHLORINE INPUT SPECIFICATIONS

ELECTRICAL CONNECTIONS

• The signal comes from the amperometric cell (other cells upon request) through a 2-pole cable, with maximum recommended length of 5 meters (for longer cables, please contact the manufacturer).
• The cell input is on removable terminal block: connect the Pt (or Au) cell terminal to the device terminal 22, and the Cu cell terminal to the device terminal 23.
• If a shielded cable is used, connect the shield to the device terminal 21 (REF), and leave it not connected on the cell side.
• If the micro-magnetic flow sensor is used, it has to be connected to the “IN FLOW” input: connect the input (black wire) to pin 11, the negative pole (blue wire) to pin 12 and the positive pole (brown wire) to pin 13.
• If a Pt100 sensor is used for temperature reading and compensation, connect the sensor wires to terminals 24 and 25. If a 3-wire Pt100 sensor is used, connect the 2 wires of the same colour at the same terminal (the wires are internally short circuited).
• Warning! The temperature compensation performed by the instrument is specific for the amperometric cell. If using a different cell, the correct functioning is not guaranteed

It is recommended to keep signal cables away from power cables.

CALIBRATION OF THE CHLORINE INPUT

To calibrate the cell, a colorimeter for measuring the chlorine concentration in aqueous solutions is needed (with DPD1 method). If the electrochemical calibration is also required, a carbon filter is needed. Run the instrument and cell for at least 12 hours with chlorinated water, containing an average chlorine working concentration. Temperature, pH, and water flow values should be constant and close to the working levels. The cell calibration is a 2-point procedure, 0 (offset) and “gain”. The input on S507 and the cell polarization have been designed to achieve the electrical zero and electrochemical zero virtually coincident. In most cases only the electrical calibration of the offset is required.

• To perform the offset electrical calibration, disconnect the removable terminal block from the input.

Start the procedure from step 1.

• To perform the offset electrochemical calibration, use water with the same chemical-physical characteristics of the process water, without chlorine (check with colorimetric test). Start the procedure from step 1. For water de-chlorination purpose, use a carbon filter.

1. Wait for a stable reading, close to zero.
2. Press and hold CAL/MENU for at least 2 seconds to enter the calibration mode.
3. Press the [-] key and the “OFFSET” message is displayed, followed by the “0.00 ppm” value.
4. If necessary, increase this value with the [+] key (e.g., water contains 0.10 ppm of chlorine because the filter did not perform a complete dechlorination)
5. Press CAL to confirm the calibration, or NEXT to exit without saving.
6. Flow working water (containing chlorine) through the measurement cell.
7. Wait for stable reading (approx. 5 minutes)
8. Use the colourimeter to measure the chlorine concentration in the water exiting from the probe holder.
9. Press and hold CAL for at least 2 seconds to enter the calibration mode.
10. Press the [+] key and the “GAIN” message is displayed, followed by the previously measured value.
11. Enter the concentration measured with the colorimeter, using the [+] and [-] keys.
12. Press CAL to confirm the calibration, or
    NEXT to exit without saving.

Note: If you attempt to calibrate using an offset value too different from the electrical zero or a gain value with a too low input signal, the instrument shows the “CALIBRATION ERROR!” message and does not save the calibration data.

CAC (or CP) CELL INPUT SPECIFICATIONS

ELECTRICAL CONNECTIONS

The signal comes from a CAC or CP cell through a 4-pole shielded cable, 1 m long (for longer cables, please contact the manufacturer).

Connections are made on a removable terminal block, as follows:

• terminal 20 (+5V) = green wire
• terminal 21 (GND) = yellow wire + shield
• terminal 22 (IN) = white wire
• terminal 23 (-5V) = brown wire

For the correct functioning of the cell, the cell should be mounted on a proper probe-holder (SD-CP series), supplied with a flow sensor for detecting the correct water flow to the cell. Connect this sensor to the “IN FLOW” input as follows:

• terminal 11 = input, black wire
• terminal 12 = negative pole, blue wire
• terminal 13 = positive pole, brown wire

These cells are internally compensated for temperature variations. Anyway, if temperature measurement is required, connect a Pt100 sensor to terminals 24 and 25. If a 3-wire Pt100 sensor is used, connect the 2 wires of the same colour at the same terminal (the wires are internally short-circuited).

It is recommended to keep signal cables away from power cables.

CALIBRATION OF THE CELL

To calibrate the cell, a colourimeter for measuring the chlorine concentration in aqueous solutions is needed (with DPD1 method). If the electrochemical calibration is also required, a carbon filter is needed. Run instrument and cell for at least 6 hours with chlorinated water, containing an average chlorine working concentration. Temperature, pH and water flow values should be constant and close to the working levels. The cell calibration is a 2-point procedure, 0 (offset) and “gain”. The input on S507 and cell polarization have been designed to achieve the electrical and electrochemical zero virtually coincident. In most cases only the electrical calibration of the offset is required.
· To perform the offset electrical calibration, disconnect the cell wires from terminals 21 and 22, and short circuit the input (pins 21 and 22). Start the procedure from step 1.
· To perform the offset electrochemical calibration, use water with the same chemical-physical characteristics of the process water, without chlorine (check with colourimetric test). Start the procedure from step 1. For water de-chlorination purpose, use a carbon filter.

1. Wait for a stable reading, close to zero.
2. Press and hold CAL/MENU for at least 2 seconds to enter the calibration mode.
3. Press the [-] key and the “OFFSET” message I displayed, followed by the “0.00 ppm” value.
4. If necessary, increase this value with the [+] key (e.g., water contains 0.10 ppm of chlorine because the filter did not perform a complete de-chlorination).
5. Press CAL to confirm the calibration, or NEXT to exit without saving.
6. Flow working water (containing chlorine) through the measurement cell.
7. Wait for stable reading (approx. 5 minutes).
8. Use the colourimeter to measure the chlorine concentration in the water exiting from the probe holder.
9. Press and hold CAL/MENU for at least 2 seconds to enter the calibration mode.
10. Press the [+] key and the “GAIN” message is displayed, followed by the previously measured value.
11. Enter the concentration measured with the colorimeter, using the [+] and [-] keys.
12. Press CAL/MENU to confirm the calibration, or NEXT to exit without saving.

Note: If you attempt to calibrate using an offset value too different from the electrical zero or a gain value with a too low input signal, the instrument shows the “CALIBRATION ERROR!” message and does not save the calibration data.

CONDUCTIVITY / RESISTIVITY INPUT SPECIFICATIONS ADDITIONAL TECHNICAL INFO

The electronic precision of the conductivity measurements is better than 1%, and the repeatability is better than 0.2% FS, without temperature compensation (resistive calibration). The temperature compensation introduces an additional error of 0.3% FS and is performed through the PT100 input. The temperature sensor may be a probe separated from the conductivity cell (e.g. PT100S), or a builtin sensor (e.g. CCK5TC). For further details, refer to the technical documentation supplied with the cell.

ELECTRICAL CONNECTIONS FOR CONDUCTIVITY CELL

The signal comes from the 2-electrode cell, to be connected to terminals 22 and 23; if a shielded cable is used, connect the shield to terminal 21 (GND). In case of low conductivity measurement, it is recommended to use a shielded cable. The Pt100 sensor input is at terminals 24 and 25. If no temperature probe is connected, the instrument uses a constant working temperature of 25.0°C. If a Pt100 probe is used, immerse it in the liquid to be tested, close to the cell or anyway at the same temperature. To avoid interferences and measure errors due to parasitic capacity of the cable, it is recommended to use a cell connection cable as short as possible. Do not extend the supplied cable; if a longer cable is needed, please contact the manufacturer. It is recommended to keep signal cables away from power cables.

ELECTRICAL CALIBRATION OF CONDUCTIVITY METER

To test the proper functioning of the instrument, connect to the cell input a resistive simulator. Set an infinite resistor value and the meter should display “0”. To calculate the resistor value to be entered for simulating a given conductivity value, use the following formula:

Notes:

• To verify the correct visualization, also consider the set “gain” factor. To view the gain value, press the [+] key.
• The temperature should be approx. 25°C; if not, leave terminals 24 and 25 not connected.

ELECTROCHEMICAL CALIBRATION OF CONDUCTIVITY METER

The electrochemical calibration allows to compensate errors due to the cell- instrument connection cable and to the mechanical error of the cell constant. If the temperature compensation feature is used, immerse the Pt100 sensor into the solution close to the cell, or anyway at the same temperature.

1. Leave the cell in air.
2. Press and hold CAL/MENU for at least 2 seconds to enter the calibration mode.
3. Press [-] and the “OFFSET” message is displayed, followed by the 0.0 μS/cm value.
4. If necessary, adjust this value using the [+] and [-] keys; the zero value with cell in air is generally not adjusted.
5. Press CAL/MENU to confirm calibration, or NEXT to exit without saving.
6. Immerse the cell and the Pt100 probe (if used) into a solution at a known conductivity value; typically, a KCl solution (see table here below).
7. Press and hold CAL for at least 2 seconds to enter the calibration mode.
8. Press the [+] key and the “GAIN” message is displayed, followed by the previously measured value.
9. If necessary, adjust this value with the [+] and [-] keys.
10. Press CAL to confirm calibration, or NEXT to exit without saving.

Notes:

• If you attempt to calibrate using an offset value too different from the range minimum value or a gain value with a too low input signal, the instrument shows the “CALIBRATION ERROR!” message and does not save the calibration data.
• The conductivity calibration automatically calibrates the resistivity range. There is no other specific procedure for resistivity range.

Conductivity values of KCl (potassium chloride) solutions:

Temp. (°C)| KCl 1 N

(µS/cm)

| KCl 0.1 N

(µS/cm)

| KCl 0.01 N

(µS/cm)

---|---|---|---
0| 65410| 7150| 776
5| 74140| 8220| 896
10| 83190| 9330| 1020
15| 92540| 10480| 1147
16| 94430| 10720| 1173
17| 96330| 10950| 1199
18| 98240| 11190| 1225
19| 100160| 11430| 1251
20| 102090| 11670| 1278
21| 104020| 11910| 1305
22| 105940| 12150| 1332
23| 107890| 12390| 1359
24| 109840| 12640| 1386
25| 111800| 12880| 1413
26| 113770| 13130| 1441
27| 115740| 13370| 1468
28|  | 13620| 1496
29|  | 13870| 1524
30|  | 14120| 1552

STANDARDIZED INPUT SPECIFICATIONS

ELECTRICAL CONNECTIONS FOR STANDARDIZED INPUT

The signal comes from the transmitter (or transducer) through a 2 or 3-pole cable, that must be shielded if longer than 25 meters. Connections are made on removable terminal block as follows:

1. Passive transducer: terminal 21 = negative (-) input terminal 22 = positive (+) input terminal 23 = power supply positive, approx. 18 Vdc @ 20 mA
2. Active transmitter: terminal 22 = positive (+) input terminal 21 = negative (-) input
3. 2-wire passive transmitter: terminal 23 (power supply) = positive input (+) terminal 21 = negative (-) input If a shielded cable is used, connect the cable shield to terminal 9 (S507 side) and leave it disconnected on the transmitter side.

ELECTRICAL CALIBRATION FOR STANDARDIZED INPUT

Errors due to instrument (S507) and transducer are typically very small and no calibration is required. However, in case of pressure transducer converted into piezometric levels, sometimes zero and gain calibrations are needed; proceed as explained here below.

1. Set the transmitter to have the minimum range signal (e.g., 0 or 4 mA)
2. Press and hold CAL/MENU for at least 2 seconds to enter calibration mode.
3. Press the [-] key and the “OFFSET” message is displayed, followed by the zero value.
4. If necessary, adjust this value with the [+] and [-] keys.
5. Press CAL/MENU to confirm calibration, or NEXT to exit without saving.
6. Set the transmitter to have the full-scale signal (or a signal greater than the 70% of the range)
7. Press and hold CAL/MENU for at least 2 seconds to enter calibration mode.
8. Press the [+] key and the “GAIN” message is displayed, followed by the previously measured value.
9. If necessary, adjust this value with the [+] and [-] keys.
10. Press CAL/MENU to confirm calibration, or NEXT to exit without saving.

Note: If you attempt to calibrate using an offset value too different from the range minimum value or a gain value with a too low input signal, the instrument shows the “CALIBRATION ERROR!” message and does not save the calibration data.

TURBIDITY METER SPECIFICATIONS

ELECTRICAL CONNECTIONS FOR TURBIDITY CELL

The signal comes from the CTS07 (or CTS96) cell through a 2-pole cable, that must be shielded if longer than 25 meters.

Connections are made on removable terminal block as follows (also see instrument rear panel):

• terminal 21 (IN-), negative input = terminal (-) of the CTS07 cell
• terminal 22 (IN+), positive input = terminal (+) of the CTS07 cell

If a shielded cable is used, connect the shield to terminal 21 on the instrument side, and leave it not connected on the cell side.

CALIBRATION OF TURBIDITY METER

Perform this procedure with maximum care, to avoid calibration errors due to dirty cell, air bubbles, foggy lenses after temperature variations, etc.

1. Introduce turbidity free water (0 FTU) into the cell.
2. Press and hold CAL for at least 2 seconds to enter the calibration mode.
3. Press the [-] key and the “OFFSET” message is shown, followed by the turbidity value previously displayed.
4. Adjust the calibration value to zero using the [+] and [-] keys.
5. Press CAL/MENU to confirm calibration, or NEXT to exit without saving.
6. Empty the cell.
7. Introduce the calibration solution (formazine properly diluted) into the cell; it is recommended to use a solution with turbidity value as close as possible to the instrument full scale (or greater than the 70% of the full scale, i.e., 70 to 100 FTU for the nephelometer, or 350 to 500 FTU for the turbidity meter)
8. Press and hold CAL/MENU for at least 2 seconds to enter the calibration mode.
9. Press the [+] key and the “GAIN” message is shown, followed by the turbidity value previously displayed.
10. Adjust the calibration value using the [+] and [-] keys.
11. Press CAL/MENU to confirm calibration, or NEXT to exit without saving.

Note: If you attempt to calibrate using an offset value too different from the range minimum value or a gain value with a too low input signal, the instrument shows the “CALIBRATION ERROR!” message and does not save the calibration data.

TEMPERATURE INPUT SPECIFICATIONS

ELECTRICAL CONNECTIONS FOR TEMPERATURE INPUT

The signal comes from a Pt100 sensor through a 2 or 3-wire cable, that must be shielded if longer than 15 meters. Connections are made on removable terminal block, at pins 24 and 25. If a sensor with 3-wire cable is used, connect to the same terminal the two wires of the same colour (internally short- circuited). If a shielded cable is used, connect the shield to terminal 21 (REF).

THERMOMETER CALIBRATION

The electronic calibration of the instrument and the precision class of the Pt100 sensor, ensure a maximum error of ±0.3°C @ 0°C and ±0.8°C @ 100°C (Pt100 class B, accordingly with IEC 751 std.).

Therefore, no user calibration is required.

Note: Factory calibration is performed with a sensor with 2 m cable. Using a probe with a cable longer than 2 meters could introduce a greater reading error

TROUBLESHOOTING

instrument continues to

operate

| Set parameters from P07 to P11 (see “Configuration” section)
ADVERT.2| Relay K2 disabled; the relay has not been configured, but

the instrument continues to operate

| Set parameters from P12 to P16 (see “Configuration” section)
ERR.1| Calculation error for proportional control K1; the min and max thresholds are too close, and the control

does not function properly

| Re-set properly the parameters P08 and P09 (see “Configuration” section)
ERR.2| Calculation error for mA output; the min and max thresholds are too close, and the output does not work

properly

| Re-set properly the parameters P19 and P20 (see “Configuration” section)
ERR.3| (For Conductivity meter only) Wrong conductivity range| Reset the parameter P01 (see “Configuration” section)
CALIBRATION ERROR!| The calibration cannot be completed successfully.| Check calibration solutions,

probe, and connection cable; repeat the procedure

OFF-CONTACT LEVEL / OFF-CONTACT FLOW| The input contact at terminals 11 and 12 is closed and the device outputs are disabled. If K1=relay, the error is related to the sensor or to the external device connected.

If K1=dosing-shot, the error refers to the level of the liquid to be dosed

| If K1=relay, check the device connected, check the flow into the probe- holder; restore the flow or contact the technical service for replacing the sensor.

If K1=dosing-shot, restore the liquid level; if the problem persists, contact the technical service

OVERHEATING DOSING-SHOT| (Only for K1=dosing-shot) The temperature control system detected an overheating of the pump magnet; all outputs are

disabled

| Wait until the magnet cools to an acceptable temperature; if the problem persists, contact the technical service
UR/OR

(Under Range/Over Range)

| The input signal is outside the measurement range of the instrument; all outputs are disabled (if the parameter P25 is not otherwise set; also

see “Configuration” section)

| Check measurement sensor and connection cable
ALARM K3 PLANT FAULT| The measured value exceeds the maximum threshold or is

below the minimum threshold of the virtual alarm K3

| Check the measurement sensor and connection cable.

Verify the proper operation of the dosing system.

References

• Steiel Elettronica | Sistemi di Dosaggio Per il Trattamento delle Acque

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