STEIEL S507-CAC Digital Electronic Controller Instruction Manual

STEIEL S507-CAC Digital Electronic Controller

Product Information

Specifications

• Model: S507-CAC
• Type: Digital Electronic Controller
• Input: CAC Amperometric Cell
• Display: Alphanumeric LCD with backlight
• Inputs: CAC Cell, Pt100 Temperature Sensor
• Outputs: Relay Outputs, Dosing-shot Output, Current Output, Serial Port
• Power Supply: AC/DC
• Dimensions: 237 x 212 (304 with open cover) x 125 mm
• Weight: Approx. 1.5 kg
• Protection Rate: IP66

Product Usage Instructions

Installation

Mounting the Instrument
The instrument is designed for wall mounting using 4 screws. Ensure the mounting surface is stable and appropriate for installation.

Wiring Instructions

Follow these steps for wiring:

• Connect the CAC cell and water flow sensor to the probe-holder.
• If needed, connect the optional Pt100 sensor for temperature measurement.
• Connect the mA output to a recorder or PLC for data recording.
• Connect relay K2 as an alarm output.
• If applicable, connect automatic cleaning with the measurement hold feature.

Description of Terminal Block

The terminal block includes:

• OUT K1: relay output for dosing-shot configuration.
• OUT K2: relay output for alarm.
• IN AUX: auxiliary input (not used in this model).
• INFLOW: digital input for various sensor connections.

FAQ (Frequently Asked Questions)

• Q: What is the warranty period for the product?
  A: The product is warranted for 12 months from the delivery date, subject to following installation, maintenance, and usage instructions strictly.

• Q: Can the instrument be modified by the user?
  A: The manufacturer reserves the right to modify the instrument without prior notice. Users should refer to the updated technical manual for any changes.

WARNINGS

• This manual is dedicated to the technical personnel responsible for 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 according to local regulations.

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

Warranty

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

INTRODUCTION

• Instruments of the S507 series are digital single-parameter controllers, with casing designed for wall mounting.
• The S507-CAC model is equipped with two measurement inputs, one for a 4-wire amperometric cell (CAC series), and one for a Pt100 temperature sensor.

Other features to be highlighted are:

• Two relay outputs (can be set as control threshold or alarm).
• One current (mA) output, fully configurable and galvanically insulated.
• One serial port for communicating with a PC (optional software) or telecontrol system.
• Possibility to disable temporarily all outputs through the START/STOP button (for example, for maintenance purposes).
• Displaying of errors and alarms.
• Internal memory for storing configuration and calibration data for at least 10 years.

Upon request, one of the relays can be configured at the factory as “dosing- shot”, for direct driving of an electronic-free dosing pump or a solenoid valve. This function is very useful when the pump works in humid environments or in the presence of fumes, which could damage its electronic board.

Technical Data

• Input for CAC Cell removable 4-pole terminal block (power supply + signal); measurement range depending on the specific cell.
• Temperature Input removable 2-pole terminal block, for direct connection of a Pt100 sensor
• Analogic Input precision is better than 0.3% FS; repeatability is better than 0.2% FS
• Digital Inputs 1 “OFF” input for disabling outputs; accepts voltage-free contact; 5 V at terminals, current max 5 mA. 1 “AUX” (auxiliary) input, available in special versions
• Relay Outputs 2 independent outputs, available on the removable 5-pole terminal block; max load 250 V~, 3 A resistive
• “Dosing-shot” Output factory configuration of the relay K1, for direct driving of a pump magnet; standard pulse 300 V / 90 msec, max frequency 120 pulses/minute (not available with 24 V power supply)
• Current Output 0-20 or 4-20 mA (selectable through software), max load 600 W, error max 0.5% FS; galvanically insulated
• Serial Port standard RS232, available on the removable 4-pole terminal block
• Power Supply 230 V~ ±10%; 50/60 Hz (115 or 24 V~ 50/60 Hz; or 24 V- ; on request)
• Power Consumption 7 VA max (version with two standard relay outputs). 70 VA max (version with K1 relay configured as “dosing-shot”)
• Protections PTC fuse, suitable to the power voltage; or F 250 mA, 5×20 with K1= “dosing-shot” and power supply 230 V~
• Display dual row (x 16 characters), alphanumeric LCD with backlight.
• Environment storage temperature -20 … +60 °C
  • working temperature -10 … +50 °C
  • RH max 90% no condensing
• Housing ABS case, watertight, for wall mounting with 4 screws.
• Protection Rate IP66
• Dimensions unit: 237 x 212 (304 with open cover) x 125 mm fixing template: 220 x h 185 mm
• Weight approx. 1.5 kg

INSTALLATION

The instrument has been designed for wall mounting, through 4 holes/screws.

Wiring Instructions

Connection of CAC cell, water flow sensor on probe-holder, and PT100 sensor (if any)

Warning!
The CAC cells are equipped with a built-in temperature sensor for the thermo- compensation of readings. The (optional) Pt100 probe is used if you also need to display the temperature measurement.

Connection of the mA output to a recorder or PLC

Connection of the relay K2 configured as an alarm.

Connection of the automatic cleaning with measurement hold

Description of the Terminal Block

• SUPPLY: connect to these terminals (1, 2, 3) the external power supply, according to voltage technical specifications indicated on the instrument label; max tolerance ±10%; connect 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 power cable of the pump to be driven (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: auxiliary input (terminals 9, 10), not used in this model.
• INFLOW: digital input (terminals 11, 12, 13); when the contact closes, the outputs are disabled and the condition is displayed; in case of simple contact, use terminals 11 and 12; in case of signal from 3- wire magnetic sensor, connect the black wire (input) to pin 11, the blue wire (negative) to pin 12 and the brown wire (positive) to pin 13
• OUT mA: current output, terminals 14 (positive) and 15 (negative)
• MEASUREMENT INPUT: terminals 20, 21, 22, 23; connect the cell cable wires as follows:
  • terminal 20 (+5V) = green wire
  • terminal 21 (GND) = yellow wire + cable shield
  • terminal 22 (IN) = white wire
  • terminal 23 (-5V) = brown wire
• PT100: the CAC cells are internally thermo-compensated, but if you need to also display the temperature, connect a Pt100 sensor to terminals 24 and 25; in case of a three-wire sensor, connect to the same terminal the two wires of the same color (internally short-circuited)
• SERIAL PORT: terminals 16 (+5V), 17 (TX), 18 (RX), 19 (GND); to be used for connection to a PC, PLC, or RW14 telecontrol system.

Warning! Before any operation, 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 the case of inductive load, the output should be protected with an 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 the correct functioning of the device even in bad interference conditions, it is recommended to insert one of the supplied ferrites on the power cable and the second one on the input signal cable. Make one or two turns (depending on the cable section) around the ferrite. Connect RC suppressors (or similar) in parallel with the load (properly dimensioned), and check the correct grounding connection of the electric cabin that contains the instrument. If the cable connected to the current output is longer than 20 meters, use a shielded cable.

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, request a third ferrite.

CONFIGURATION

Keyboard, LEDs, 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; a blinking light indicates malfunction or outputs disabled through the START/STOP button.
• Display The measured value is displayed on the first row, while the second one shows the temperature. This value is 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.

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 the “ERRORS” section.
• After completing the start-up operations, the device enters the normal operating mode, displays the main measurement and temperature, and updates accordingly the current and relay outputs.

Configuration
Here below you can find the instructions for configuring editable parameters from the front keyboard.

1. Press and hold the CAL/MENU key for at least 2 seconds to enter 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 [+] and [-] 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 [+] and [-] keys.
5. Press CAL to confirm the modification or NEXT to proceed without saving.
6. Now the display shows the next parameter.
7. Proceed as explained in 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 the configuration mode.

List of Configuration Parameters

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

PAR.| Description| Min

Value

| Max

Value

| Factory

Value

| Set

Value

---|---|---|---|---|---
P01| Measure type| 0| 2| 0 ()|
P02| Reserved| –| –| –|
P03| Reserved| –| –| –|
P04| Working temperature| 0| 100| 25 °C|
P05| See “Dosing-shot” instructions at the end of this section|
P06|
P07| Working mode for K1| 0| 5| 2|
P08| Minimum threshold for relay K1 (or PWM control start)| -10.00| 20.00| 0.50 ppm ()|
P09| Max threshold for relay K1 (or PWM control end)| -10.00| 20.00| 0.60 ppm (*)|
P10| Energizing delay for relay K1

(or PWM control time)

| 0| 240| 0 sec|
P11| De-energizing delay for relay K1 (or minimum TON/TOFF value)| 0| 240| 0 sec|
P12| Working mode for K2| 0| 6| 2|
P13| Minimum threshold for relay K2

(or cleaning pause time, in minutes)

| -10.00| 20.00| 0.80 ppm ()|
P14| Max threshold for relay K2 (or washing time, in seconds)| -10.00| 20.00| 0.90 ppm ()|
P15| Energizing delay for relay K2

(or hold time after cleaning, in seconds)

| 0| 240| 0 sec|
P16| De-energizing delay for relay K2| 0| 240| 0 sec|
P17| Starting delay| 0| 60| 0 min|
P18| mA output type| 0| 1| 1|
P19| Starting value for mA output| -10.00| 20.00| 3.00 ppm ()|
P20| Full-scale value for mA output| -10.00| 20.00| 2.00 ppm ()|
P21| Fault mA value| 0.0| 21.0| 3.0 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 (ppm)| -10.00| 20.00| -0.10 ()|
P27| Max threshold for K3 alarm (ppm)| -10.00| 20.00| 2.10 ()|
P28| Triggering delay for K3 alarm| 0| 240| 0 min|
P29| Autoset| 0| 100| 0|

(*) These values may differ depending on the used cell type.

Meaning of Parameters

P01 MEASURE TYPE
The instrument comes already configured for the connection of a CAC cell (as shown by the “Potenz.” message at start-up). The measurement range is also configured at the factory.

Only in the case of low-range measurement (1 ppm), this parameter allow to selection of the resolution:

• P01=0 => standard range, 0.00 to 1.00 ppm (2 decimals)
• P01=1 => sensitive range, 0.000 to 1.000 ppm (3 decimals), option reserved to expert users and only for low chlorine levels (default setting in case of chlorine dioxide ClO2 measurements). This configuration also allows to restriction of the proportional regulation up to 0.025 ppm at the 4-20 mA output.

Warning!
Changing this parameter directly affects the default values marked with (*) in the table on the previous page. It is therefore mandatory to check them individually.

• P02, P03 PARAMETERS NOT USED

• P04 WORKING TEMPERATURE
  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, P06 See “Dosing-shot” instructions at the end of this section.

• P07 WORKING MODE FOR K1

The K1 output allows setting the dosing mode as ON-OFF or time proportional (PWM), for example in the case of an electromagnetic pump without mA input, solenoid valve, or motor pump.

The relay can be configured in 5 different working modes:

P10 & P11 = Delays

2| Contact closed < threshold P08 … P09 > contact open| Dosing oxidant

P10 & P11 = Delays

3| Contact open < threshold P08 [ PWM ] P09 > contact closed| Dosing reductant

P10 & P11 = Timebase

4| Contact closed < threshold P08 [ PWM ] P09 > contact open| Dosing oxidant

P10 & P11 = Timebase

5| Function not available for this model|

Note: in the case of K1 output configured as “dosing-shot”, refer to the specific instructions at the end of this section.
ON-OFF dosing mode

• P07=1 => Contact closes (and dosing activates) when the max threshold (P09) is exceeded and opens (resulting in a dosing stop) when measurement returns below the min threshold (P08).
• P07=2 => Contact closes (and dosing activates) when measurement falls below the min threshold (P08) and opens (resulting in a dosing stop) when the max set limit (P09) is exceeded.

Time proportional dosing mode (PWM) – gradual injection of reagent, without major jumps

• P07=3 => Proportional control with dosing of a reductant product (=increases as measurement increases): the energizing time of relay K1 is low (or null) when the measurement is below the minimum threshold (P08) and increases gradually up to the maximum (or always on) when the max threshold (P09) is exceeded.

• P07=4 => Proportional control with dosing of an oxidant product (decreases as measurement increases): the energizing time of relay K1 is maximum (or always on) when the measurement is below the minimum threshold (P08) and decreases gradually till the minimum (or always off) when the max threshold (P09) is exceeded.

• P08 MINIMUM THRESHOLD FOR RELAY K1
  Minimum intervention threshold for relay K1.

• P09 MAX THRESHOLD FOR RELAY K1
  Maximum intervention threshold for relay K1.

• P10 ENERGIZING DELAY FOR RELAY K1
  This parameter allows to setting of an energizing delay (in seconds) for relay K1 if configured for working mode 1 or 2. Setting zero will exclude the delay and the relay triggers immediately. In the case of proportional control (PWM), this parameter is used to enter the time base, in seconds.

• P11 DE-ENERGIZING DELAY FOR RELAY K1
  This parameter allows to setting of a de-energizing delay (in seconds) for relay K1 if configured for working mode 1 or 2. Setting zero will exclude the delay and the relay triggers immediately. In the case of proportional control (PWM), this parameter is used to enter the ON and OFF minimum time, in seconds.

For correct operations, choose the configuration parameter values following the below indications:

• The difference between the minimum and maximum thresholds must be greater than 31 points.
• The minimum control time (P10 – P11) must be greater than 5 seconds.
• Practically, the base time should be set depending on the device (Solenoid valve 10…20 seconds, Electromagnetic dosing pump 120…360 seconds, Asynchronous motor > 600 seconds, etc.). It is recommended to also ask your electrician for an evaluation of the minimum ON-OFF times to avoid any damage to the controller.
• Even in the case of proportional control through mA output (see parameters P19 and P20), the difference between the minimum and max thresholds must be greater than 31 points.

P12 WORKING MODE FOR K2
The output K2 can be used to generate an alarm depending on the set limit threshold or to stop a pump that doses according to the signal of a volumetric water meter but is controlled by the S507 unit. The relay can be configured in 7 different operation modes:

P15 & P16 = delays

2| Contact closed < threshold P13 … P14 > contact open| Dosing oxidant

P15 & P16 = delays

3| Contact open < threshold P13 [ closed ] P14 > open| Alarm – Contact closed between the set thresholds
4| Contact closed < threshold P13 [ open ] P14 > closed| Alarm – Contact open between the set thresholds
5| Auto-cleaning system| P13-P14-P15 change function
6| Auto-cleaning system (IN AUX – pin 9, 10)| P13-P14-P15 change function

ON-OFF dosing mode

• P12=1 => Contact closes (and dosing activates) when the max threshold (P14) is exceeded and opens (resulting in a dosing stop) when measurement returns below the min threshold (P13).
• P12=2 => Contact closes (and dosing activates) when the measurement is below the minimum threshold (P13) and opens (resulting in a dosing stop) when the max set threshold is exceeded (P14).

Alarm (or limit value)

• P12=3 => NC (normally closed) alarm, i.e., the K2 contact is closed when the measurement is in the range between the set thresholds (P12 and P13).
• P12=4 => NO (normally open) alarm, i.e., the K2 contact is open when the measurement is in the range between the set thresholds (P12 and P13).

Auto-cleaning with measurement “hold”

• P12=5 => Automatic cleaning cycle: at set time intervals, the instrument freezes measurement, activates the relay K2 (to which is connected, for example, a solenoid valve for the detergent dosage) for a set time; then deactivates K2 and holds measurement frozen for the time needed to complete the washing; finally, it resumes normal operations. The times for the cleaning cycles are set by the user (see following parameters). During a cleaning cycle, the “AUC” message is displayed.
• P12=6 => Automatic cleaning cycle synchronized with the “IN AUX” contact; the functioning is the same as explained for mode 5, but the cycle is started by the dedicated input.

Warning! P07 must be different from 5!

• P13 MINIMUM THRESHOLD FOR RELAY K2
  Minimum intervention threshold for relay K2. If P12=5 (cleaning cycle), this parameter indicates the pause time (in minutes) between two cleaning cycles.

• P14 MAX THRESHOLD FOR RELAY K2
  Maximum intervention threshold for relay K2. If P12=5 (cleaning cycle), this parameter indicates the washing time (in seconds).

• P15 ENERGIZING DELAY FOR RELAY K2

  • Energizing delay for relay K2: value in seconds in case of ON-OFF mode (P12=1 or 2); value in minutes in case of alarm relay (P12= 3 or 4).
  • If P12=5 (cleaning cycle), this parameter indicates the measurement freezing delay (in seconds) at the end of the washing cycle.

• P16 DE-ENERGIZING DELAY FOR RELAY K2
  De-energizing delay for relay K2: value in seconds in case of ON-OFF mode (P12=1 or 2); value in minutes in case of alarm relay (P12= 3 or 4).

• P17 STARTING DELAY
  The sensor connected to the measurement input may need some stabilization time before providing reliable readings, but anyway, outputs are activated depending on measured values. This parameter allows to set of a proper delay (in minutes), during which the instrument is on stand-by after start-up. Entering zero means not activating this delay.

• P18 mA OUTPUT TYPE
  This parameter allows to set the current output, choosing one of the two available options:

option
1| 4-20 mA| Recommended option

Note:
The current output precision refers to values greater than 0.3 mA (approx.). Therefore, the values of the 0-20 mA range start are not accurate.

P19, P20 STARTING AND END VALUES FOR mA OUTPUT.
These parameters allow to setting of the measurement values corresponding to the start (0 or 4 mA) and full-scale (20 mA) values of the current output.

0.800

(THRESHOLD)

| 1.200| 0/4-20 mA| Control output with reductant dosing
1.200

(THRESHOLD)

| 0.800| 0/4-20 mA| Control output with oxidant dosing

• P21 FAULT mA VALUE
  You can set the current (mA) value for the output in case of a fault condition (e.g., reading out of range, measurement disabled, ON key pressed, etc.).

• P22 PARAMETER NOT USED

• P23 PASSWORD
  The user can enter a protection password to prevent unauthorized access to the configuration menu.
  Warning! If the password is forgotten, the instrument must be sent to the manufacturer for a full reconfiguration!

• P24 LANGUAGE
  This parameter allows you to choose the display language as follows:

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

• P25 UR / OR FUNCTIONING

  • In case of input signal is too low or too high, the instrument considers the measurement out of control: the related error message is displayed, outputs K1 and K2 are disabled, and the mA output is forced to the value set in parameter P21. This is the working mode recommended by the manufacturer and factory set, which corresponds to the zero value in this parameter.

  • In some cases, you could need to “hide” this anomaly in different ways, for example by disabling the error message displaying and/or by not affecting the output status. To set the desired combination, consider the following:
    relay (K1 + K2) = value 1; mA output = value 2; error displaying = value 4.

  • The sum of the values corresponding to the desired options is the value to be set in this parameter. For example, if in the case of UR/OR condition, you want to display the error message without affecting the relay and mA outputs, set P25 = 1+2 = 3.

the UR / OR error message is displayed
1| Relays are not disabled
2| The mA output value is not modified
3| Relays are not disabled, and the mA output value is not modified
4| The display will not show the UR / OR condition
7| No action => relays are not disabled, the mA output value is not modified, the UR / OR error message is not displayed

P26, P27 LIMIT MEASUREMENT THRESHOLDS (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, while P27 sets the maximum threshold that should never be exceeded by the measurement.
• If the reading falls below the limit set in P26 or exceeds the value entered in P27, an alarm is generated, all outputs are disabled, and the mA output is forced to the value set in P21. The message “Alarm K3 Plant Fault” is displayed alternately with the measurement.

P28 TRIGGERING DELAY FOR K3 ALARM
This parameter is used to set a triggering delay for the K3 alarm when the thresholds are exceeded, to avoid undesired alarms due for example to noises or small temporary fluctuations of measurement. This delay is set in minutes.

P29 AUTOSET (Reset)
This parameter allows to restoration of the factory settings in case incongruent values have been entered. To perform this action, enter “12” in P29. The display will show the “Autoset done!” for approx. 3 seconds, then the instrument returns to normal operations.

Dosing-shot (configuration available upon order, for special applications)
Relay K1 can be factory configured as a “dosing-shot”, for direct driving of an electronic-free dosing pump or solenoid valve.

PAR.| Description| Min value| Max value| Factory value| Set value
---|---|---|---|---|---
P05| Injection frequency (pulses/min)| 1.0| 120.0| 120.0|
P06| Manual frequency (pulses/min)| 0.0| 120.0| 60.0|

P05 INJECTION FREQUENCY IN AUTOMATIC MODE
This parameter allows to set the maximum number of injections per minute, that the output can reach in automatic ON-OFF (P07=1 or P07=2, see below) or proportional (P07=3 or P07=4) mode; The max typical value is 120 injections/minute.

P06 INJECTION FREQUENCY IN MANUAL MODE
You can start a manual operation of the driven pump and use this parameter to set the desired minimum number of injections per minute in this mode.

P07 WORKING MODE FOR K1 CONFIGURED AS DOSING-SHOT
Five different working modes are available for K1 configured as “dosing-shot”:

P10 and P11 = delays

2| Working pump < threshold P08 … P09 > pump in standby| Dosing oxidant

P10 and P11 = delays

3| Standby < threshold P08 [ PWM ] P09 > working pump| Dosing reductant

P10 and P11 = time base

4| Working pump < threshold P08 [ PWM ] P09 > standby| Dosing oxidant

P10 and P11 = time base

5| Function not available for this version|

• ON-OFF dosing mode
  • P07=1 => The pump is activated as the max threshold (P09) is exceeded and stops when measurement returns below the minimum threshold (P08).
  • P07=2 => The pump is activated when the measurement is lower than the minimum threshold (P08) and stops as the max threshold (P09) is exceeded.
• Time proportional dosing mode (PWM) – gradual injection of reagent, without major jumps
  • P07=3 => Output K1 is disabled if measurement is lower than the minimum threshold (P08), then starts injecting slowly till it achieves the max working frequency (set with the parameter P 5) when the maximum limit (P09) is reached.
  • P07=4 => No injections if the measurement exceeds the max threshold (P09), then the injections increase as measurement decreases up to the maximum frequency set with the parameter P05 when the minimum limit (P08) is reached.

APPLICATION EXAMPLES.

DOSING CONTROLLED BY THE RELAY K1 of the S507 unit.

1. Dosing consent signal to proper input of an electromagnetic pump (PSP161)
2. Consent signal for pump with three-phase motor, through electrical panel/contactor
3. ON/OFF power supply for peristaltic pump

ON-OFF Control

PWM (PROPORTIONAL) Control: Chlorination Example

Note:
In the case of dosing activation by relay K1 and PWM control, by pressing simultaneously the [+] and [-] keys, the values of T(On) – T(Off) times are displayed.

DOSING CONTROLLED BY THE “OUT mA” OUTPUT of the S507 unit; consent signal to the analogic (mA) input of an electromagnetic dosing pump (PSP161).

Proportional Control

Connection of relay K2 for “cutting” the pulse signal from the volumetric water meter

CALIBRATION

Calibration of the CAC Cell Input

• For the cell calibration, you need a reference instrument, such as a photometer which analyses the concentration of the used disinfectant in water.
• Make the system (instrument + cell) work for at least 6 hours, with water containing the disinfectant at the average working concentration. Check that temperature, pH, and flow rate values are stable and near to the working ones.

1. Take a water sample from the probe-holder sampling outlet.
2. Perform a colorimetric test with the reference photometer.
3. Hold the CAL/MENU key for approx. 2 seconds to enter the calibration mode, then press [+] to calibrate the GAIN.
4. Use the [+] / [-] keys to adjust the displayed value to the photometer reading.
5. Press CAL/MENU to confirm calibration, or NEXT to exit without saving.

Notes:

• Zero is factory-calibrated and normally no action is required. Anyway, if the sensor must perform measurements < 0.1 ppm, the electric calibration of the zero point (OFFSET) can be performed as follows:
  • Disconnect the cell from the terminal block and short-circuit the input (pins 21 and 22)
  • Hold the CAL/MENU key for approx. 2 seconds to enter the calibration mode, then press [-] to perform the zero calibration.
  • Use the [+] / [-] to adjust the displayed reading, then press CAL/MENU to confirm calibration, or NEXT to exit without saving.
• If you try to calibrate the GAIN with a too-low input signal (or the OFFSET with a value quite far from the electrical zero), the instrument displays the “CAL. IMP!” (Calibration impossible) message and does not save the calibration.

Calibration of the Temperature Input
The electronic calibration of the instrument and the accuracy class of the Pt100 sensor ensures a maximum error of ±0.3°C at 0°C and ±0.8°C at 100°C (Pt100 class B, according to IEC 751 standard). Therefore, no user calibration is required.

Additional Visualizations
By pressing the [+] and [-] keys during normal operations, the instrument displays the OFFSET and GAIN values of the CAC cell:

• [+] Key GAIN multiplication factor (0.500 … 2.000)
• [-] Key OFFSET in points (-200 … 200)

Note: At factory calibration, the OFFSET = 0 and GAIN = 1.000 values are set.

ERRORS AND ALARMS

When an error is detected (or the START/STOP key is pressed), the ON LED starts blinking, and the mA output value becomes that set in P21; one of the following messages is displayed:

ADVERT.1

| Relay K1 disabled; the relay has not been configured but the instrument is working| Configure parameters P07 … P11

ADVERT.2

| Relay K2 disabled; relay has not been configured but the

instrument is working

| Configure parameters P12 … P16

ERR.1

| Calculation error for K1 proportional control; the min and max thresholds are too near, and

the adjustment does not work properly

|

Reconfigure the parameters P08 and P09

ERR.2

| Calculation error for mA output; the min and max thresholds for the mA range are too near and

the output does not work properly

|

Reconfigure the parameters P19 and P20

CALIBRATION IMPOSSIBLE!| An impossible calibration has been requested| Check cell and connection cable; repeat the procedure

CONTACT OFF / FLOW

| The input contact at terminals 11 and 12 is closed and the device is blocked (outputs disabled).

If K1=relay, the error comes from the external device connected to this input

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

| If K1=relay, check the connected device, check the flow rate in the probe- holder, and check the sensor; restore the water flow or contact the technical service for sensor replacement

If K1=dosing-shot, restore the

liquid level; if the problem persists, contact the technical service

OVERHEATING

(K1=dosing-shot)

| Temperature control has detected a pump magnet overheating; outputs are disabled| Wait for the cooling to an acceptable temperature; if the problem persists, contact the

technical service

UR / OR

(Under / Over Range)

| The measurement signal is outside the expected range; all outputs

are disabled (unless a different setting of parameter P25)

|

Check cell and connection cable

ALARM K3 – PLANT FAULT| Measurement is above the max

value or below the minimum limit set for the K3 virtual alarm

| Check cell and connection

cable. Check the correct operation of the dosing system.

Simulation of the CAC Cell Signal

• 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.

If a mV signal generator is available, you can simulate the cell signal by connecting it to terminals 21-22 and generating a 0 to 2 V signal.

RS232 Serial Line

• The S507 series instruments feature an RS232 bidirectional serial port, which can be used for communication/configuration with PC, PLC, and similar interfaces.
• Standard transceiver characteristics are 9600 BAUDS, 8 BITS PA, R Iand and aY, 1 STOP BIT (Different options are available upon request).
• The serial line test can be performed by simply connecting the instrument to a PC equipped with a proper serial port and running a terminal emulation software, e.g., HYPERTERMINAL.
• No communication protocol is provided, but commands are sent using standard ASCII characters with no control character.

The S507 unit interprets the following commands:

measurement, e.g., “ a$001.50 ”
a2| The request of meas. 2 (temperature)| Display the temperature value, e.g., “ a &0029.3”
aA| The request for parameter 1 value| Display value of parameter 1, e.g., “ a@01=00003 ”
aA=01234| Set parameter 1 value| Set the value 1234 for parameter 1
aB| The request of parameter 2 value| Display value of parameter 2, e.g., “ a@02=00025 ”
aB=00006| Set parameter 2 value| Set the value 6 for parameter 2

• All commands are enabled by (or ).
• As you can see from the above example, the text answering a measurement request is always made of two “acknowledge” characters, followed by the characters of measurement (including sign and decimal point).
• If the command asks for reading parameters, the “acknowledge” characters are still provided, followed by the parameter value, in a five-character fixed format. In the command of reading (or writing) parameters, the letter following the “a” (address) identifies the parameter number, i.e. A = parameter1, B = parameter2, C = parameter3, etc. All parameters are read (or written) in the five-character fixed format and without a decimal point (for example, in an S507_pH,
• P08 is the minimum threshold for relay K1, e.g., 7.35pH; the reading (aH) answers a@08=00735, while for writing its value, the required setting is aH=00735).
• In case of typing errors (e.g., “aa” instead of “a1”), press to cancel the wrong command (which will not generate any answer) and type the correct desired command.

Note:
The unit automatically interprets and sends even other messages, reserved to the manufacturer and technical service, not described in this document.

Warning!
The connection of the device to a PC/PLC may cause an alteration of one or more measurements, due to different grounding of the device/liquid under test and PC/PLC. In these cases, it is recommended to add galvanic insulation to the serial line. Please contact the manufacturer

References

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

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