GREISINGER GMH 5430 Conductivity Measuring Device Waterproof Instruction Manual

GREISINGER GMH 5430 Conductivity Measuring Device Waterproof Instruction Manual

General Note

Read this document carefully and get used to the operation of the device before you use it. Keep this document within easy reach near the device for consulting in case of doubt.

Safety

Intended Use

The device is designed for measuring conductivity, resistivity, salinity and TDS in fluids – using external suitable electrodes (measuring cells). It is designed for the mobile use or the stationary operation in a controlled electromagnetic environment (lab). The electrodes are connected via 7-pole bayonet connection.

Please consider: Depending on the measuring range different electrode types may be needed – choose an appropriate one.

Personnel which starts up, operates and maintains the device has to have sufficient knowledge of the measuring procedure and the meaning of the resulting measured values, this manual delivers a valuable help for this. The instructions of the manual have to be understood, regarded and followed.

To be sure that there´s no risk arising due to misinterpretation of measured values, the operator must have further knowledge in case of doubt – the user is liable for any harm/damage resulting from misinterpretation due to insufficient knowledge.

The manufacturer will assume no liability or warranty in case of usage for other purpose than the intended one, ignoring this manual, operating by unqualified staff as well as unauthorized modifications to the device.

Safety signs and symbols
Warnings are labeled in this document with the followings signs:

Caution! This symbol warns of imminent danger, death, serious injuries and significant damage to property at non-observance.
Attention! This symbol warns of possible dangers or dangerous situations which can provoke damage to the device or environment at non-observance.
Note! This symbol point out processes which can indirectly influence
operation or provoke unforeseen reactions at non-observance.

Safety guidelines

This device has been designed and tested in accordance with the safety regulations for electronic devices. However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety measures and special safety advises given in this manual will be adhered to when using the device.

1. Trouble-free operation and reliability of the device can only be guaranteed if the device is not subjected to any other climatic conditions than those stated under “Specification”.
   If the device is transported from a cold to a warm environment condensation maycause in a failure of the function. In such a case make sure the device temperature has adjusted to the ambient temperature   before trying a new start-up.

2. If there is a risk whatsoever involved in running it, the device has to be switched off immediately and to be marked accordingly to avoid re-starting. Operator safety may be a risk if:

   • there is visible damage to the device
   • the device is not working as specified
   • the device has been stored under unsuitable conditions for a longer time. In case of doubt, please return device to manufacturer for repair or maintenance.

3. When connecting the device to other devices the connection has to be designed most thoroughly as internal connections in third-party devices (e.g. connection GND with protective earth) may lead to undesired voltage potentials that can lead to malfunctions or destroying of the instrument and the connected devices.

4. This device must not be run with a defective or damaged power supply unit. Danger to life due to electrical shock!

5. Do not use these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury or material damage. Failure to comply with these instructions could result in death or serious injury and material damage.

6. This device must not be used at potentially explosive areas! The usage of this device at potentially explosive areas increases danger of deflagration, explosion or fire due to sparking.

Product Specification

Scope of supply
The scope of supply includes:

• GMH 5430 with 2 AAA batteries
• Operating manual
• Short form manual

Operation and maintenance advice

1. Temperature measuring / sensor connection:
   There is the possibility to connect a temperature sensor (Pt1000 or NTC 10k) to the 7-pole bayonet socket. Generally a suitable temperature sensor is included to the measuring cell. The measured temperature is used for the automatic temperature compensation (e.g. Lin or nlF) and is additionally displayed.

2. Battery operation :
   If ‘bAt’ is shown in the lower display the battery has been used up and needs to be replaced. However, the device will operate correctly for a certain time. If ‘bAt’ is shown in the upper display the voltage is too low to operate the device;

3. the battery has been completely used up. Battery change: p.r.t. chapter 13. The battery has to be taken out, when storing device above 50°C. We recommend taking out battery if device is not used for a longer period of time. After recommissioning the real-time clock has to be set again.

4. Treat device and sensor carefully. Use only in accordance with above specification. (do not throw, hit against etc.). Protect plug and socket from soiling.

5. USB or mains operation:
   When connecting a mains cable or USB interface cable, please take care to connectonly allowed components.

The output voltage of a connected power supply unit has to be between 4.5 and 5.5 V DC. Don’t apply overvoltage!
We recommend operation with interface cable USB 5100. Then device is supplied by the USB interface of the connected PC or USB power supply adapter

Handling

Display elements

1. Main display: conductivity (mS/cm, µS/cm) resistivity (kΩcm, MΩcm) TDS / total dissolved solids (mg/l) salinity (SAL)
2. Secondary display: measuring value temperature
3. Arrows to selected measuring unit
4. Rating of battery state
5. Display elements to show minimum / maximum / memorized measuring value
6. nLF, NaCl, Lin: display element for selected temperature compensation
7. %/K, 1/cm: additional configuration units
8. without function at this device type.

Pushbuttons

On / off key, backlight
press shortly: activate backlight or switch on instrument
press longer: switch off instrument
set / menu:
press shortly: Change unit in display (if “InP: Set“)
press for 2 sec. (menu): invoke configuration menu
min / max:
press shortly: min. or max. value is displayed
press for 2 sec: the corresponding value is deleted
cal: only at mode ‘cond’=conductivity: press for 2 sec: start cell constant adjustment
store / enter:
Measurment: hold and save current measuring value (‘HLD’ is displayed) Set/Menu: confirm settings, return to measuring

Connections

Universal output: interface, supply (see chapter 8 “Universal Output”)
7-pole bayonet socket: connection for electrode / measuring cell and temperature probe
Use of bayonet-connectors:
Lock/ unlock with turnable ring at cable socket
Protect contacts from moisture and soiling!

Pop-up clip

Handling:

• Pull at label “open” in order to swing open the pop-up clip.
• Pull at label “open” again to swing open the pop-up clip further.
  

Function:

• The device with a closed pop-up clip can be plainly laid onto a table or attached to a belt, etc.
• The device with pop-up clip at position 90° can be set up on a table, etc.
• The device with pop-up clip at position 180° can be suspended from a screw or the magnetic holder GMH 1300
  

Start Operation

Connect electrodes, turn device on via key.
After segment test the device displays some information on its configuration: if zero point or slope correction is active (see chapter 9 Adjustment of Temperature Input)
If a measuring cell will be connected to the instrument the first time or if the measuring cell was changed, the referring cell parameters in the instrument have to be entered, before measuring:
, und . Please refer to chapter 7 Configuration. After that the device is ready for measuring.

Principles of the Measurements

Basics about conductivity

Definition of conductivity: The ability of a material to conduct electric current: γ   ୪ R•A
l: length of the material
A: diameter
R: measured resistance

Unit ሾγሿ ൌ S୧ୣ୫ୣ୬ୱ ୫ୣ୲ୣ୰ ൌ S ୫, common for liquids: ୫S ୡ୫ and ஜS ୡ୫
The conductivity is the reciprocal value of the resistivity.
(The conductance is the reciprocal value of the measured resistance R)

Measuring ranges and cell constants
Different measuring ranges can be realized depending on the used electrode. Therefore the device offers four cell constant ranges to choose, depending on the correspondent cell constant K:

K=1**
10| 4.000 – 15.000 •1/cm| Electrodes with K=10 (for extremely high conductivities)

The cell constant can be selected manually in the configuration menu (see chapter 7 “Configuration”) or with
the adjustment/calibration function. Then there are two possibilities:
automatically with an reference solution (temperature compensated)
adjustment/calibration of the displayed value if actual value of solution is known

Conductivity measurement
The conductivity measurement is a rather uncomplicated measurement. The standard electrodes are stable for a long time if used correctly and can be adjusted by an integrated Cal-function.
Attention: The device covers a wide measuring range, however a electrode suitable for the measuring range has to be used.

Resistivity measurement

The resistivity is the reciprocal value of the conductivity and the device displays it in kOhm•cm (MOhm•cm).

– 50.00 MOhm•cm
0.1| 0.010 – 5.000 kOhm•cm| 0.01 – 50.00 kOhm•cm| 0.0 – 500.0 kOhm•cm| 0.000 – 5.000 MOhm•cm
1| 0.0010 – 0.5000 kOhm•cm| 0.001 – 5.000 kOhm•cm| 0.00 – 50.00 kOhm•cm| 0.0 – 500.0 kOhm•cm
10| —| 0.0001 – 0.5000 kOhm•cm| 0.000 – 5.000 kOhm•cm| 0.00 – 50.00 kOhm•cm

TDS measurement

At the TDS (total dissolved solids) measurement the filtrate dry residue is determined by means of the conductivity and a conversion factor (C.tdS). Well suited for easy concentration measurements of e.g. salt solutions. The determined value is displayed in mg/l.

Displayed value TDS = conductivity [in µs/cm, nLF-temp. comp. at 25°C] • C.tdS (input at menu)

C.tdS|
---|---
0.50| Monovalent salts with 2 ion types (NaCl, KCl, etc.)
0.50| Natural waters / surface waters, drinking water
0.65 – 0,70|

Attention : This are only approximate values – good for estimations, but no precise measurement. For precise measurements the conversion value has to be determined for the corresponding solution for the relevant concentration range.
This may be done by comparison with known reference solutions or by actually evaporating a certain amount of solution with determined conductivity and subsequent weighing of the dry residue.

Salinity measurement
At the salinity measurement “SAL” the salinity (salt content) of seawater is determined (based on: International Oceanographic Tables; IOT). Standard seawater has a salinity of 35 ‰ (35 g salt per 1 kg seawater).
Commonly the measured value is displayed dimensionless in ‰ (g/kg).
Additionally the term “PSU” (Practical Salinity Unit) is sometimes used, the displayed value is the same. The salinity measurement has its “own” temperature compensation, i.e. the temperature is automatically taken into account for the salinity measurement. The menu settings regarding the temperature compensationare ignored.

****The salt composition of the different seas is not the identical. Depending on place, weather, tides, etc. there may be considerable divergences to the 35 ‰ according to IOT. Additionally the salt composition may influence the ratio between salinity and actual salt content.
For many salts of the seawater aquaristics the corresponding tables are available (salt weight to salinity according to IOT or conductivity). Considering these tables, very precise salinity measurements can be performed (Therefore we recommend the 4-pole graphite measuring cells LF 400 or LF 425.).

Electrodes / measuring cells

Assignment bayonet-connector device pin assignment

1. electrode I+
2. electrode U+
3. electrode U
4. electrode I
5. temperature sensor
6. temperature sensor
7. not connected

Design and selection
Basically there are two types of measuring cells: 2-pole and 4-pole cells. The operation is done similarly; the 4-pole measuring cells can compensate polarization effects and – up to some degree – soiling due to its complex measuring method.

pole measuring cell

pole measuring cell

The selection of a suitable electrode depends on the desired application.

• The widest range of application is guaranteed by high-quality 4-pole graphite measuring cells (LF 400 or LF 425, all the above applications and: seawaters, titration and sewage).
• For low conductivities (<100 µS/cm) stainless steel measuring cells offer advantages (LF 200 RW, pure and ultrapure water, boiler water, osmosis, filter technology).
• 2-pole platinum electrodes with glass shaft are good solution for used in petrol, diesel, etc. with low conductivities (< 1000 µS/cm) (LF 210)

Calibration / Adjustment of measuring cells
Especially in harsh environments and over long time the cell constants of measuring cells are drifting. Depending on the application and use we recommend a regular checking of the precision of the measuring chain: instrument + cell. For this there are control solutions available (GKL 100, 101, 102). At normal use a checking each half year is recommended (see chapter 10 Automatic Adjustment/Calibration of Cell Constant). A system check at the manufacturer is recommended in case of doubt: see  chapter 12 Accuracy Check / Adjustment Service).

Temperature compensation
The conductivity of aqueous solutions depends on its temperature. The temperature dependency is strongly dependent on the type of solution. The temperature compensation recalculates solutions’ conductivity to a consistent reference temperature. The most common reference temperature is 25 °C.

Temperature compensation “nLF” according to EN 27888
For most applications (e.g. in the area of fish farming, surface or drinking water measurements, etc.) the nonlinear temperature compensation for natural water (“nLF”, according to EN 27888) is sufficiently accurate.  The common reference temperature is 25 °C. Recommended application range of nLF- compensation: between 60 µS/cm and 1000 µS/cm.

Linear temperature compensation and determination of temperature coefficient “t.Lin“
If the actual function needed for exact temperature compensation is not known, “linear temperature compensation” is normally selected (Menu, t.Cor = Lin, t.Lin corresponds TK୪୧୬), i.e. one assumes that the actual temperature dependency at the considered concentration range is approximately equal:

Temperature coefficient of about 2.0 %/K are most common.
A temperature coefficient can be determined for example by measuring a solution with deactivated temperature compensation at two different temperatures (T1 and T2).
TKlin is the value input at the menu “t.Lin”.
LFT1 conductivity at temperature T1
LFT2 conductivity at temperature T2

Configuration

Some menu points depend on current device settings.

To change device’s settings, press “menu” for 2 seconds. This will activate the configuration menu (main display: “SEt”). Pressing “menu” changes between the menus points, pressing jumps to the referring parameters, which can be selected with key . The parameter value can be changed with or . Pressing “menu” again jumps back to the main configuration menu and saves the settings.
Pressing “enter” finishes the configuration.
Pressing “menu” and “store” at the same time for more than 2 seconds will reset the device to factory defaults.
If no key is pressed for more than 2 minutes the configuration will be aborted.  All changes will be discarded!

Menu| Parameter| Value| Description| |
---|---|---|---|---|---
| |  or| | |
| Set Configuration: General configuration| |
| I nput: Selection of measured unit| **|
SEt| Choice of displayed unit via set-key
Cond| Conductivity
rES| Resistivity
SAL| Salinity
tdS| Total dissolved solids
| TDS measurement: conversion factor (only if Inp = tdS)| |
0.40 – 1.00| Conversion factor for TDS measurement
| Cell Range: Adjustment of cell constant: cell constant range| |
0.01| Ultrapure water, electrodes with K ~ 0.01
0.1| Ultrapure water, electrodes with K ~ 0.1
1| Standard electrodes, i.e. with K= 0.55 or K=1
10| Electrodes with K=10
| Cell Factor: Adjustment of cell constant: multiplication factor| |
0.4000 -1.5000| Multiplication factor of cell constantCell constant CELL = CELL Range * CELL Factor
| t-Input: Selection of temperature input type| |
ntc| NTC 10k sensor
Pt| Pt1000 sensor
| Range: Selection of display range (conductivity, resistivity or tdS)| |
Auto| Automatic range selection
e.g. 0.0 – 500.0 µS/cm| Example for CELL rAng 1 and InP Cond: others in chapter 6.2
…0- 1000 mS/cm| Example for CELL rAng 1 and InP Cond: others in chapter 6.2
| Automatic adjustment/calibration with reference solution (only if Inp = Cond)| |
Edit| Manual adjustment to reference value
REF.S| Choice of standard reference solutions
| REF.S: Choice of standard reference solutions for automatic adjustment/cal.| |
1413 µS/cm| Reference solution 0.01 M KCL
2760 µS/cm| 0.02 M KCL
12.88 mS/cm| 0.1 M KCL
50 mS/cm| Sea-water reference solution KCL
111.8 mS/cm| 1 M KCL
 |  | Unit t: Selection of temperature unit|  |
---|---|---|---|---
°C| All temperature values in degree Celsius
°F| All temperature values in degree Fahrenheit

| Temperature compensation (not for InP = SAL)|  |
oFF| No temperature compensation of conductivity measurement
nLF| Non-linear function for natural waters according to EN 27888 (ISO 7888), ground, surface and drinking water
NaCl| Compensation for weak NaCl-solutions (pure and ultrapure water)
Lin| Linear temperature compensation
 | Compensation coefficient (only if t.Cor = Lin)|  |
0.300 3.000| Temperature compensation coefficient in %/K
 | Reference temperature of temperature compensation (only if t.Cor = Lin or nLF)|  |
25 °C / 77 °F| Reference temperature 25 °C / 77 °F
20 °C / 68 °F| Reference temperature 20 °C / 68 °F
 | Adjustment/Calibration: Adjustment reminder period (factory setting: 180)|  |
1 …730| Adjustment reminder period (in days)
oFF| No adjustment reminder
 | Auto Hold: Automatic measuring value identification (only if Logger = oFF)|  |
on| Auto measuring value identification (only if Logger = oFF) Auto Hold
oFF| Standard hold function on key press (only if Logger = oFF)
| Auto Power-Off : Selection of power-off delay|  |
1…120| Power-off delay in minutes.

Device will be automatically switched off as soon as this time has elapsed if no key is pressed/no interface communication takes place.

oFF| Automatic power-off function deactivated (continuous operation)
| Background illumination|  |
oFF:| Illumination deactivated
5 … 120| Turn off illumination after 5… 120s (factory settings: 5 s)
on:| Illumination always on
|

Set Output: Configuration of universal output

|

|

|

oFF

|

Interface off -> minimal power consumption

|

|

SEr:

|

Serial interface activated

|

|

01,11..91

|

Base address for serial interface communication

|

|

|

Set Corr: Measurement correction

|

**

|

|

Zero point adjustment / offset of temperature measurement

|

**

|

oFF

|

No zero point adjustment for temperature measurement

-5.0 … 5.0°C

|

Offset of temperature measurement in °C

|

Slope adjustment of temperature measurement

|

**

|

oFF

|

No slope adjustment for temperature measurement

-5.00 … 5.00

|

Slope correction of temperature measurement in [%]

|

Set Clock: Setting of real time clock

|

|

|

HH:MM

|

Clock : set time hours:minutes

|

|

|

YYYY

|

Year : set year

|

|

|

TT.MM

|

Date : set date day.month

|

|

|

rEAd CAL: Read calibration data:

see chapter 11.2 “Calibration memory (rEAd CAL)”

|

|

Universal Output

The output can be used as serial interface (for USB5100 interface converter). If the output is not needed, it is strongly recommended to deactivate it (Out oFF) to lower power consumption. This increases battery life time.
If the device is used together with interface adapter USB 5100 the device is supplied from the interface. device pin assignment:

device pin assignment:

1. external supply +5V, 50mA
2. GND
3. TxD/RxD (3.3V Logic)
4. without function
   Only suitable adaptor cables are permitted (accessories)!

When operating with external supply or connected interface and measurement at solutions with earth connection, there may appear distortions or deviations of the measuring. In case of doubt disconnect supply/interface

Interface

The following standard software packages are available:

• EBS20M / -60M: 20-/60-channel software for measuring value display
• GMHKonfig: Configuration Software (for free on internet)

In case you want to develop your own software we offer a GMH3000-development package including:

• a universally applicable Windows functions library (‘GMH3000.DLL’) with documentation, can be used by
  all ‘established’ programming languages, suitable for:
  Windows XP™, Windows Vista™, Windows 7™, Windows 8 / 8.1™, Windows 10™

• Programming examples Visual Studio 2010 (C#, C++ and VB), Testpoint™,LabView™, etc.

The device has 2 channels:

Channel 1: current measuring value (Cond, rES, TDS or SAL) and base address channel 2: temperature value
The measuring-/ alarm- and display range values read back from the interface are always in the selected measurement unit!

****When using the interface, the auto-range-function should be turned off. If auto-range is activated, the returned value ar based on the resolution of the smallest ranges, there may be returned extreme values like 123400.0 µS/cm instead 123.4 mS/cm.

Adjustment of Temperature Input

The temperature input can be adjusted with offset and scale. A reasonable adjustment presumes reliable references (e.g. ice water, controlled precision water bath, etc.).
If the inputs are adjusted (i.e. offset and scale are different from default settings) the device will shortly display “Corr” after turned on.
Default setting for offset and scale are ‘off’ = 0.0, i.e. inputs are not changed. Zero point correction: Displayed value = measured value – OFFS
Zero point and slope correction: Displayed value = (measured value – OFFS) * (1 + SCAL / 100) Displayed value °F = (meas. value °F – 32°F – OFFS) • (1 + SCAL / 100)

Automatic Adjustment/Calibration of Cell Constant

Besides the direct input of the cell constant (see below) via the menu (“CELL FACt”) the cell constant can also be determined automatically (Please select CELL rAnG in menu before):

Afterwards the device returns to the normal measuring operation mode or – if so – displays an error message.
The resulting cell constant can be seen in the menu at “CELL rAng” and the calibration history.

Error messages of automatic adjustment/calibration:

Alternative to automatic adjustment:
Manual calculation of cell constant with a reference solution
Example KCl-solution c= 0.01 M: 1413 μS cm-1 at 25°C
At other temperatures switch temperature compensation off (t.Cor = oFF) and use the referring conductivity!
Conductivity displayed = 1900 μS cm-1 if selected cell constant is 1.000 cm-1 (CELL FACt = 1.000)
Conductivity of solution at solution temperature 25 °C: Conductivity real = 1413 μS cm-1 Cell constant k = conductivity real / conductivity displayed [cm-1]

GLP

GLP (Good Laboratory Practice) includes regular check of devices and accessories. For pH measurements it is highly important to ensure correct pH calibration. The device provides the following functions to help with this.

Calibration interval (C.Int)
You can input the interval after which the device reminds you to recalibrate. The interval times should be chosen according to the application and the stability of the electrode. “CAL” flashes on the display as soon as the interval has expired.

Calibration memory (rEAd CAL)
The last calibration is stored with results and date and can be read out.
Display calibration data:
Historical calibration data can be comfortably read out via PC software GMHKonfig or displayed directly at   the device.

Press for 2 seconds: The display will show: (configuration level) Press several times until this is displayed: read cal. = “read calibration data” Press shortly: switch between:

• CELL = cell constant
• C.rEF = reference value, at which cell constant has been adjusted
• Display of date + time of data set

Accuracy Check / Adjustment Service

You can send the device to the manufacturer for adjustment and inspection.

Calibration certificate – DKD certificate – official certifications:
If the measuring instrument is supposed to receive a calibration certificate, it has to be sent to the manufacturer (declare test points).

If the device is certificated together with a suitable sensor very high overall accuracies are possible. Basic settings can only be checked and – if necessary – corrected by the manufacturer.
A calibration protocol is enclosed to the device ex works. This documents the precision reached by the production process.

Replacing Batteries

Before changing batteries, please read the following instruction and follow it step by step. Not following the instruction may cause harm to the instrument or the protection against ingress of water and dust may be lost! Avoid unnecessary opening of the instrument!

1. Open the 3 Phillips screws at the backside of the instrument.

2. Lay down the still closed instrument, so that the display side points upwards.The lower half of the housing incl. the electronics should be kept lying down during battery change.
   This avoids loss of the 3 sealing rings placed in the screw holes.

3.  Lift off upper half of housing. Keep an eye on the six function keys, to be sure not to damage them.

4. Change carefully the two batteries (Type: AAA).

5. Check: Are the 3 sealing rings placed in the housing? Is the circumference seal of the upper half sound and clean?

6. Close the housing, taking care that it is positioned correctly, otherwise the sealing may be damaged. Afterwards press the two halves together, lay the instrument with display pointing downwards and screw it together again Take care to screw only until you feel increasing resistance, higher screwing force does not result in higher water protection!

Error and System Messages

| Description| What to do?
---|---|---
No display or confusedcharacters,| Battery emptyMains operation: wrong voltage or polarity| Replace batteryCheck power supply, replace it if necessary
Device does not react on keypress| System error Device defective| Disconnect battery and power supply, wait shortly, then reconnectReturn to manufacturer for repair
**Err.1| Measured value above allowable range ** Sensor defective| Check: pressure not within sensor range?-> measuring value to high!Return to manufacturer for repair
**Err.2| Measured value below allowable range ** Sensor defective| Check: pressure not within sensor range?-> measuring value to low!Return to manufacturer for repair
Err.7| System errorValue extremely out of measuring range| Return to manufacturer for repairValue extremely out of measuring range
**—-| Could not calculate display value•    measuring range or input range exceeded•     measured values are instable| ** Check range parameter ** Wait for signal regulation of the device
> CAL <*CAL flashing in upper display| Either preset calibration interval has expired or last calibration is not valid| Device has to be calibrated!
CAL Err.1| Cell constant too high| Determined cell constant must not exceed 1.2 cell range
---|---|---
CAL Err.2| Cell constant too small| Determined cell constant must not fall below 0.4* cell range
CAL Err.3| Solution of wrong range| Wrong cell range / wrong solution / far beyond tolerance
CAL Err.4| Wrong temperature| Beyond permitted temperature:0.0 – 34.0 °C (or 0.0 – 27.0 °C at 111.8 mS/cm)

If “bAt” is flashing the battery will be exhausted soon. Further measurements are possible for short time. If “bAt” is displayed continuously the battery is ultimately exhausted and has to be replaced. Further measurements aren’t possible any more.

Reshipment and Disposal

Reshipment
****All devices returned to the manufacturer have to be free of any residual of measuring media and other hazardous substances. Measuring residuals at housing or sensor may be a risk for persons or environment
Use an adequate transport package for reshipment, especially for fully functional devices. Please make sure that the device is protected in the package by enough packing materials.

Disposal instructions

Batteries must not be disposed in the regular domestic waste but at the designated collecting points.
The device must not be disposed in the unsorted municipal waste! Send the device directly to us (sufficiently stamped), if it should be disposed. We will dispose the device appropriate and environmentally sound.

Specification

0.004 … 0.015
Conductivity 1 )| 0.0…. 500.0 µS/cm| 0.00…. 50.00 µS/cm| 0.000…. 5.000 µS/cm
”| 2 )| 0 … 5000 µS/cm| 0.0…. 500.0 µS/cm| 0.00…. 50.00 µS/cm
”| 3 )| 0.00…. 50.00 mS/cm| 0 … 5000 µS/cm| 0.0…. 500.0 µS/cm
”| 4 )| 0.0…. 500.0 mS/cm| 0.00…. 50.00 mS/cm| —
”| 5 )| 0 … 1000 mS/cm| —| —
Resistivity| 0.0010…. 500.0 kOhmcm| 0.010 … 5000 kOhmcm| 0.0001…. 50.00 MOhmcm
TDS| 0.0 … 5000 mg/l| 0.00 … 5000 mg/l| 0.000 … 5000 mg/l
Salinity| 0.0…. 70.0 g/kg (PSU)
Temperature| -5.0 … +100.0 °C, Pt1000 or NTC (10k)23.0…. 212.0 °F
Supported cell constants| 4.000 … 15.000 / cm; 0.4000 … 1.5000 / cm; 0.04000 … 0.15000 / cm;0.004000 … 0.015000 / cm
Accuracy| Conductivity| ±0.5% of m.v. ±0.1 % FS (system accuracy is dependent on electrode!)
Temperature| ±0.2 K
Connections| Conductivity, Temperature| 7-pole bayonet socket for connection of different measuring cells Supported temperature sensors Pt1000 and NTC 10k
Interface / ext. supply| 4-pole bayonet socket for serial interface and supply (USB Adapter USB 5100)
Display| 4 ½ – digit, 7-segment, illuminated (white)
Add. functions| Min / max / hold function
Adjustment/ Calibration| Cell constant manually or automatically via selectable reference solution
GLP| Selectable adjustment intervals (1 to 730 days, CAL-warning after expiration)Memory: latest 16 adjustments
Housing| | Break-proof ABS housing, incl. silicone protective cover
Protection class| IP65 / IP67
Dimensions LWH [mm]| 160 86 37 incl. silicone protective cover, approx. 250 g incl. battery and cover
Working conditions| -25 to 50 °C; 0 to 95 % RH (non condensing)
Storage temperature| -25 to 70 °C
Power supply| | 2*AAA battery (included in scope of supply) or external
Current consumption| 6.25 mA (for Out = oFF, equivalent to 160 h), backlight ~10mA (auto-off)
Battery indicator| 4-stage battery state indicator,Change battery display for exhausted battery: “bAt”, warning: “bAt” flashing
Auto-off function| Device will be automatically switched off if no key is pressed/no interfacecommunication takes place for the time of the power-off delay. The power-off delay can be set to values between 1and 120 min.; it can be completely deactivated.
Directives and standards| The instruments confirm to following European Directives: 2014/30/EU EMC Directive2011/65/EU RoHSApplied harmonized standards:EN 61326-1 : 2013         emissions level: class Bemi immunity according to table 3 and A.1 Additional fault: <1%

References

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