GREISINGER G1500 Series pH Meter Redox Measuring Device Instruction Manual

GREISINGER G1500 Series pH Meter Redox Measuring Device

About this documentation

Foreword
Read this document carefully and familiarise yourself with the operation of the device before you use it. Keep this document ready to hand and in the immediate vicinity of the device so that it is available to the personnel/user for reference at all times in case of doubt. The user must have carefully read and understood the operating manual before beginning any work.

Legal notices
The liability and warranty of the manufacturer for damages and consequential damages are voided with misuse, disregarding this document, disregarding safety notices, assignment of inadequately qualified technical personnel and arbitrary modifications of the device. This document is entrusted to the recipient for personal use only. Any impermissible transfer, duplication, translation into other languages or excerpts from this operating manual are prohibited. The manufacturer assumes no liability for print errors.

Further information

• The software version of the device:
• V1.2 or later
• For the exact product name, refer to the type plate on the rear side of the device.

NOTE
For information about the software version, press and hold the ON button to switch on the device for longer than 5 seconds. The series is shown in the main display and the software version of the device is shown in the secondary display.

Safety

Explanation of safety symbols
DANGER
This symbol warns of imminent danger, which can result in death, severe bodily injury, or severe property damage in case of non-observance.
DANGER
This symbol indicates danger for living tissue as well as a variety of materials, which can be damaged or destroyed when coming into contact with this chemical. The caustic effect, protective equipment required!
CAUTION
This symbol warns of potential dangers or harmful situations, which can cause damage to the device or to the environment in case of non-observance.
NOTE
This symbol indicates processes, which can have a direct influence on the operation or can trigger an unforeseen reaction in case of non-observance.

Foreseeable misuse
The fault-free function and operational safety of the device can only be guaranteed if applicable safety precautions and the device-specific safety instructions for this document are observed. If these notices are disregarded, personal injury or death, as well as property damage can occur.

DANGER

• Incorrect area of application!
• In order to prevent erratic behavior of the device, personal injury, and property damage, the device must be used exclusively as described in the chapter Description in the operating manual.
• Do not use in safety / Emergency Stop devices!
• The device is not suitable for use in explosion-prone areas!
• The device must not be used for diagnostic or other medical purposes on patients!
• The device is not intended to come into direct contact with food. For measurements in foods, samples must be taken and discarded after the measurement!
• Not suitable for use with requirements on functional safety, e.g. SIL!

Safety instructions

DANGER

• The danger of breaking the electrodes!
• All electrodes contain glass parts that can cause injuries when broken. There is an elevated risk of injury in connection with measurements in foods.
• Inspect the electrode before and after the measurement!
• Always measures in samples for measurements in foods. Discard these samples after the measurement!

CAUTION

Empty batteries and batteries of inferior quality can leak more easily, which can destroy the device. Please also observe the instructions in the chapter “Operation and Maintenance”.

NOTE
This device does not belong in children’s hands!

Intended use

G 1500: The device is designed for measuring the pH value in water and aqueous media by means of suitable electrodes.
G 1501: The device is designed for measuring the pH value and Redox by means of suitable electrodes in water an aqueous media. Temperature compensation takes place automatically with a connected temperature sensor. Application examples for this are, for example, drinking water, wastewater, surface water, swimming pools, fish breeding, and process chemistry.

Qualified personnel

For commissioning, operation, and maintenance, the relevant personnel must have adequate knowledge of the measuring process and the significance of the measurements. The instructions in this document must be understood, observed, and followed. In order to avoid any risks arising from the interpretation of the measurements in the concrete application, the user must have additional expertise. The user is solely liable for damages/danger resulting from misinterpretation due to inadequate expertise.

The device at a glance

Display elements

• Battery indicator: Evaluation of the battery status.
• Unit display: Display of units or type of mode, min/max/hold.
• Main display: Measurement of the current pH value or value for min/max/hold.
• Auxiliary display: Corresponding temperature for the displayed pH value with the unit. Measured temperatures are displayed with a decimal place, and adjusted without.
• Bar graph: Progress for calibration and visualization of the electrode evaluation.

Connections

• BNC connection Connection for pH electrode (Un/locking with rotating ring on the cable plug) 2x 4mm banana Connection for temperature sensor or reference electrode (only available at G 1501).

CAUTION

• Ensuring water tightness!
• The device guarantees protection from spray water, rain or accidental immersion in water. This protection for the plug connector is only guaranteed when plugged in.
• Moisture or contaminants on the contacts can result in incorrect measurement results.
• Protect contacts from soiling and moisture!
• Dry off damp plug connectors as quickly as possible!

NOTE
The temperature measurement can be influenced by conductive liquids on the banana sockets. We recommend always keeping the connections dry.

Operating elements

On / Off button

• Press briefly Switch on the device Activate / deactivate lighting Long press Switch off the device Reject changes in a menu.

Up / Down button

• Press briefly Display of the min/max value Change value of the selected parameter.
• Long press Reset the min/max value of the current measurement.
• Both simultaneously Rotate the display, and overhead display.

Function button

• Press briefly: Freeze measurement (Hold). Call up the next parameter.
• Long press, 2s: Start menu “configuration”, (ONF appears in the display.
• Long press, 4s: Start automatic calibration, (AL appears in the display.
• Operating status: device is in measured value display. the device is in a menu.

Operation

Opening the configuration menu.

1. Press the Function key for 2 seconds to open the Configuration menu.
2. (ONF appears in the display. Release the Function key.

Adjustment of the measuring input (only available at G 1501)
The temperature input can be adjusted with the zero point correction and the gradient correction. If an adjustment is made, you change the pre-adjusted factory settings. This is signaled with the display text or when switching on.

1. Switch the device off.
2. Hold the down button and press the On/Off button briefly to switch on the device and open the Adjustment menu.
3. The display shows the first parameter. Release the down button.

The formula used by the device

Temperature = °C: Display = (measured value – ) (1 +  / 100)
Temperature = °F: Display = (meas. value – 32 °F – ) (1 + / 100) + 32 °F

Adjustment Example

• Temperature unit= °C, the adjustment is carried out in 2 separate steps at 0 °C (e.g. ice water) and at a reference temperature (e.g. clinical thermometer with water bath 37
• °C).- First set the values of t.oF and t.SL in the adjustment menu to 0
• Zero point: – Set the temperature probe to 0 °C and let it adjust.
• Start the adjustment menu and enter the display value at 0 °C for t.oF
• After leaving the menu, the device should now display 0.0 °C.
• Slope: – Set the temperature sensor to the reference temperature and let it adjust.
• Calculate slope correction: .=( −1)∗100
• Start the adjustment menu and enter the calculated value at t.SL
• Exit the menu, the device should now display the reference temperature.

Measurement Basics

To start the measurement, remove the protective cap from the electrode and rinse the shaft and the membrane with distilled water.

pH measurement

Explanation

• The pH value describes the acidic or alkaline behavior of an aqueous solution. A pH value below 7 is acidic, a value above 7 is alkaline. A pH value of 7 is neutral.
• The pH measurement is very precise but also sensitive. The measured signals are very weak and high-ohmic. This is the case, in particularly in low-ion media.

NOTE
In order to detect the pH value of a solution, it should always be recorded together with the measurement temperature, because most liquids change their pH value with the temperature. The following must be observed:

• * avoid interference, electrostatic charges, etc.

  • keep plug contacts clean and dry
  • prevents electrodes, which do not have any special waterproof versions from extended immersion above the shaft
  • calibrate electrodes sufficiently often. They can range from every hour to several weeks, depending on the electrode and the application
  • Use a suitable electrode

pH electrode

Normally, so-called pH single-rod measuring chains are used. They include all necessary components that are integrated in an electrode. There are also electrodes with integrated temperature sensors. Design of a pH electrode:

1. Coaxial cable
2. Reference electrode
3. Measuring electrode
4. Refill opening
5. Electrolyte
6. Internal buffer
7. Diaphragm
8. Glass membrane / source layer

The diaphragm, which establishes a connection between the electrolyte and the liquid to be measured, can be designed in different ways. Clogging or soiling of the diaphragm is a frequent cause of a malfunctioning or slug-gish electrode. Always handle the glass membrane with extreme care. The so-called source layer forms there. This is crucial for the measurement and must always be kept moist.

Further information
A pH electrode is a worn part. If the signal is very slow or the required values are no longer observed after careful cleaning and possible regeneration, the electrode must be replaced. When using the electrodes, be aware that various substances in aqueous solutions can corrode glass and that chemicals can produce a chemical reaction with the KCl solution in the electrode, which can result in the blockage of the diaphragm.

• In solutions that contain proteins, such as for measurements in medical and biological applications, KCl can cause denaturation of the protein.
• Coagulated paints
• Solutions that contain high concentrations of silver ions

Substances that accumulate on the glass membrane or the diaphragm affect the measurement and must be removed regularly. This can be achieved for example with automatic cleaning systems.

Service life
The service life of electrodes is normally at least 8 to 10 months. When cared for properly, this can usually increase to more than 2 years. The actual life will vary depending on the particular application.

Choosing a pH electrode
For most applications, the GE 114 or the GE 125 or GE 135 can be used. However, some areas of application require special electrodes, please refer to our catalog.
Short info on electrodes supplied in sets:

• GE 114 is a universally applicable, durable, and low-maintenance gel electrode with a Pellon diaphragm. It can be used for measurements in drinking water, swimming pools, aquaria, and slightly contaminated wastewater.
• GE 125 is a waterproof, universally applicable, durable, and low-maintenance gel electrode with a ceramic diaphragm and integrated Pt1000 temperature sensor. It can be immersed above the shaft for an extended time.
• GE 135 is a waterproof, universally applicable, durable, and low-maintenance gel electrode with a ceramic diaphragm and integrated Pt1000 temperature sensor. It can be immersed above the shaft for an extended time.

Care and maintenance

NOTE
The glass tip of the electrode with the sensitive hydrated layer must be kept moist, e.g. with 3 mol/l KCl solution in the storage cap. Accidental drying- out of the electrode can be reversed under certain circumstances after storage for several hours in 3 mol/l KCl, but this cannot be guaranteed.

NOTE
The GAK 1400 working and calibration set includes all necessary products for calibration, care, and maintenance of the electrode. Normal cleaning takes place with the GRL 100 pepsin cleaning solution into which the electrode is immersed for 5 minutes before being rinsed off with clean water.

NOTE
Crystallization of the 3 mol/l KCL solution is unavoidable. Crystallized potassium chloride on the protective cap and shaft can easily be removed with a fingernail or cloth and is therefore not a defect or grounds for complaint. Dirty electrodes must be cleaned. The suitable cleaning agents for the pH glass mem-brane are listed in the table below:

HCl solution

Resin lignins| Acetone
Extremely resistant residues| Hydrogen peroxide or sodium hypochlo- ride

The material of the pH electrode must always be protected. Plastic shafts must not be cleaned in solvents, etc. If in doubt, contact the manufacturer to inquire about suitable cleaners for the existing electrode. This is also important in the case of aggressive substances or other substances that are not primarily water-based!

Redox measurement (ORP) (only available at G 1501)

Explanation

The Redox potential 0RP specifies the extent to which the measured sample has an oxidizing or reducing effect relative to the standard hydrogen electrode.
This potential is frequently used in swimming pools as a measured variable for the disinfecting effect of chlorination. For aquaria, the Redox value is also an important parameter, because fish can only live within a specific Redox range. The measurement is also important in drinking water preparation, wastewater monitoring, and in industrial applications. Measurement takes place relative to the widespread silver/silver-chloride system with 3 mol/l KCL electrolyte. The measurements can be read directly (mV setting) or automatically with the mVH measuring unit setting and temperature compensation is calculated based on the standard hydrogen electrode reference system.
Calibration comparable to the pH measurement does not take place for the Redox measurement. However, the suitability of the electrodes can always be checked with Redox testing solutions, such as GRP 100.

redox electrode

NOTE
Special redox electrodes (e.g. GR 105) are used for the redox measurement. The pH electrodes cannot be used for redox measurement!

Operation and maintenance

Operating and maintenance notices

NOTE
The device and electrode must be handled with care and used in accordance with the technical data. Do not throw or strike.

NOTE
Plugs and sockets must be protected from soiling.

NOTE
If the device is stored at a temperature above 50 °C or is not used for an extended period of time, the batteries must be removed. Leaks from the batteries are avoided as a result.

NOTE
The electrode should be stored in dry rooms at a temperature between 10 °C and 30 °C. If the storage temperature range is exceeded or undercut, the electrode can be destroyed. It should always be stored wet in 3 mol/l KCl. Extended storage in distilled or deionized water will result in the depletion of the reference electrolytes.

NOTE
The pH electrode included in the scope of supply should be arranged vertically upwards with the connecting cable. A slight angle of inclination does not impair the measurement.

Calibration of the pH measurement

General Explanation

• The following steps describe how to calibrate the device.
• To achieve a precise measurement, observe the following points.

NOTE

• If possible, the calibration range should overlap the measuring range.
• To achieve this, it is recommended to use buffer solutions for measurements as follows:
  • below pH 7 uses Puffer pH 7,0 and pH 4,0
  • above pH 7 uses Puffer pH 7,0 and pH 10,0.

NOTE
Calibrations are only possible in a temperature range from 0 °C to 60 °C! We recommend performing calibration at temperatures between 10 °C and 40 °C.

NOTE
Calibration should be conducted at the same temperature used for the measurement in the medium. To equalize the temperatures of the buffer solutions and electrode, they should be stored together for a while in a place that is protected against draught.

NOTE
If a temperature sensor is not connected, measure the temperature of the buffer solution with a thermometer. The exact value of the buffer solution is temperature dependent and can be determined based on the tables provided.

NOTE
Always use fresh buffer solutions!

Buffer solutions
At least one buffer solution is required to calibrate the device.
With the help of the GPH buffer capsules, appropriate solutions can be prepared as follows:

1. Fill a plastic bottle with approx. 100 ml of distilled water.
2. Open the buffer capsule carefully by twisting the capsule halves and pulling. It should be ensured that nothing is spilled. They can also be used without opening them; opening the capsules only reduces to time for dissolving.
3. Place the buffer capsule and its contents in the plastic bottle.
4. Wait at least 3 hours.
5. Shake well before using it for the first time.

Temperature dependence of the buffer solution:

| color| 10 °C| 20 °C| 25 °C| 30 °C| 40 °C
---|---|---|---|---|---|---
| | | | | |
GPH 4.0| Orange| 3,99| 3,99| 4,01| 4,01| 4,03
GPH 7.0| Green| 7,06| 7,01| 7,00| 6,99| 6,98
GPH 10.0| Blue| 10,18| 10,06| 10,01| 9,97| 9,89
GPH 12.0| White| 12,35| 12,14| 12,00| 11,89| 11,71

Alternatively, you can also use a ready-to-use PHL buffer solution. (The temperature dependency is printed there in each case).

Automatic pH calibration
With the “automatic calibration” function, the device can be recalibrated with the help of 2 buffer solutions. The temperature dependence of the GPH buffer solution is automatically compensated.

NOTE
The ready-mixed PHL buffer solutions have a slightly different temperature dependence. When using the PHL buffer solutions, an adjustment error of a few hundredths of pH is to be expected, depending on the temperature of the solutions.

NOTE
Rinse off the electrode with distilled or deionized water before and after placing the electrode in the buffer solution.

Procedure for the calibration

1. Press the Function key for 4 seconds to open the Calibration menu. The display shows .
2. Release the Function key.
3.  appears in the display.
4. Place the electrode in the GPH 7.0 buffer solution.
5. The device determines the correct value automatically. If the value is determined, the display flashes, and an acoustic signal is issued to indicate a change to the next calibration point.
6. If the temperature sensor is not inserted, enter the temperature of the buffer solution by pressing the Up key and Down key and confirm the entry by pressing the Function key again.
7. and alternate in the display.
8. Then, rinse the electrode with distilled or deionized water.
9. Place the electrode in the second buffer solution. The device recognizes whether it is a or. buffer solution automatically.
10. If the temperature sensor is not inserted, enter the temperature of the buffer solution by pressing the Up key and Down key and confirm the entry by pressing the Function key again.
11. Then, rinse the electrode again with distilled or deionized water.

After the successful completion of the calibration, the assessment of the electrode condition is displayed briefly in percent. Then, the current measurement is shown in the display again. An aged or contaminated electrode, incorrect adjustment of the pressure, contamination of the platinum electrode or a damaged membrane can be the cause for a lower evaluation. If the calibration is not completed successfully, an error message is displayed. (AL ERR. appears in the display See Error and system messages [ ]. Confirm the error message by pressing the Function key. The device restarts and the standard value for the gradient is restored.

Manual calibration
In the configuration menu, it is possible to manually adjust the device by entering the corresponding parameters ( ), similar to a device with rotary knobs. You can carry out a 1-point or 2-point calibration.

1. point calibration: Here, only a zero-point shift of the measurement takes place. A 1-point calibration is only advantageous if measurement takes place in a narrow range around the calibration point. A reliable electrode evaluation is not possible in this case
   Required material: any buffer solution

2. point calibration: First the zero point and then the slope are calibrated.
   Required material: – A buffer solution with a value between pH 6.75 and 7.25 – A second buffer solution with a value below pH 6 or above pH 8
   We recommend conducting a 2-point calibration or automatic calibration because a 1-point calibration only entails a shift of the zero point.

NOTE
Rinse off the electrode with distilled or deionized water before and after placing the electrode in the buffer solution.
Procedure for the calibration:

1. Press the Function key for 2 seconds to open the Configuration menu.
2.  appears in the display. Release the Function key.
3. The parameter. appears if the temperature sensor is not plugged in. If the temperature sensor is plugged in, you jump to the next point.
4. Enter the temperature of the buffer solution by pressing the Up key and Down key and confirm the entry by pressing the Function key again.
5. The PK.OF parameter appears in the display
6. Place the electrode in any buffer solution (for 1-point calibration) or the buffer solution with a value of pH 6.75 … 7.25 (for 2-point).
7. Wait until the display value is stable.
8. Adjust the value corresponding to the buffer solution (note temperature dependency!) with the Up key and Down key
9. 1-point: Press the Function key for 2 seconds to confirm the entry and to end the calibration. 2-point: Press the Function key briefly to confirm the entry and proceed with the 2nd calibration point.
10. The. parameter appears in the display
11. Place the electrode in the second buffer solution with a value below pH 6 or above pH 8.
12. Wait until the display value is stable.
13. Adjust the value corresponding to the buffer solution (note temperature dependence!) with the Up key and Down key.
14. Press the Function key for 2 seconds to confirm the entry and to end the calibration.
15. Then, rinse the electrode again with distilled or deionized water.

After the successful completion of the calibration, the assessment of the electrode condition is displayed briefly in percent. Then, the current measurement is shown in the display again. A low value can be the result of the age of the electrode, contaminated or old buffer solutions or impurities on the BNC connector. If the calibration is not completed successfully, an error message is displayed. ((AL ERR. appears in the display. See “Error and system messages”. Confirm the error message by pressing the Function key. The device restarts and the standard value for the zero point and gradient are restored.

Display the electrode assessment of active calibration

Display the electrode assessment of active calibration:

1. Press the Function key for 2 seconds to open the Configuration menu. appears in the display. Release the Function key.
2. The parameter SET.T appears if the temperature sensor is not plugged in. Press the Function key briefly again to switch to the next parameter.
3. The. parameter appears in the display.
4. Press the Function key for 2 seconds without changing the values with the Up key or Down key to exit the menu.

The electrode assessment in percent is displayed (“—-” if no valid data is available).

Battery

Battery indicator
If the empty frame in the battery display blinks, the batteries are depleted and must be replaced. However, the device will still operate for a certain length of time.
If the BAT display text appears in the main display, the battery voltage is no longer adequate for the operation of the device. The battery is fully depleted.

Changing battery
DANGER
The danger of explosion! Using damaged or unsuitable batteries can generate heat, which can cause the batteries to crack and possibly explode!  Only use high-quality and suitable alkaline batteries!

CAUTION

Damage!
If the batteries have different charge levels, leaks and thus damage to the device can occur.

• Only use high-quality and suitable alkaline batteries!
• Do not use different types of batteries!
• Remove depleted batteries immediately and dispose of them at a suitable collection point.

NOTE
Unnecessary unscrewing endangers the protection against moisture and should therefore be avoided.

NOTE
Read the following handling instructions before replacing batteries and follow them step by step. If disregarded, the device could be damaged or the protection from moisture could be diminished.

1. Unscrews the Phillips screws (A) and remove the cover.
2. Carefully replace the two Mignon AA batteries (B). Ensure that the polarity is correct! It must be possible to insert the batteries in the correct position without using force.
3. The O-ring (C) must be undamaged, clean, and positioned at the intended depth.
4. Fit the cover (D) evenly. The O-ring must remain at the intended depth!
5. Tighten the Phillips screws (A).

Error and system messages

Sensor or probe defect

Measurement far outside of the measuring range

| Cable breakage

Incorrect measuring probe

Measuring probe or device defect

| Connect a suitable measuring probe

Stay within the allowable measurement range

Send in for repair

No display, unclear characters, or no response when buttons are pressed| Battery depleted System error Device is defective| Battery depleted Error in the device| Replace battery Send in for repair
BAT| Battery depleted| Battery depleted| Replace battery

(AL<| Error during the last calibration| Faulty calibration| Conduct a new calibration
ERR.1| Measuring range exceeded| Measurement too high

Incorrect electrode/probe connected

Electrode, probe, or device defect

| Stay within the allowable measurement range

Check electrode/probe

Send in for repair

ERR.2| The measuring range is undercut| Measurement too low

Incorrect electrode/probe connected

Electrode, probe, or device defect

| Stay within the allowable measurement range

Check electrode/probe

Send in for repair

SYS ERR| System error| Error in the device| Switch the device on/off Replace batteries Send in for repair
| | |
---|---|---|---
(AL ERR.1| Neutral buffer not allowed| Incorrect buffer solution used

A buffer solution is contaminated

Electrode-contaminated or defective

| Use fresh buffer solution

Clean electrode, re- calibrate

Replace electrode

(AL ERR.2| The slope is too low| Incorrect buffer solution used

A buffer solution is contaminated

Electrode-contaminated or defective

| Use fresh buffer solution

Clean electrode, re- calibrate

Replace electrode

(AL ERR.3| The slope is too high| Incorrect buffer solution used

A buffer solution is contaminated

Electrode-contaminated or defective

| Use fresh buffer solution

Clean electrode, re- calibrate

Replace electrode

(AL ERR.4| Incorrect calibration temperature| Temperature too low or too high| Range of 0..60 °C
(AL ERR.5| Time exceeded during automatic calibration| Unstable electrode signal

A buffer solution is contaminated

| Stirring the buffer solution

Clean the electrode

Use fresh buffer solution Restart calibration

Technical data

-1293 .. +1707 mVH

Temperature| —| -5.0 .. 105.0 °C (23.0 .. 221.0 °F)
Accuracy (at nom. temperature)
| pH| ± 0.02 pH ± 1 digit| ± 0.02 pH ± 1 digit
Redox| —| ± 0.1% FS ± 1 digit
Temperature| —| ± 0.3 °C
Connection
| pH, (redox)| BNC connection for electrode| BNC connection for electrode
Temperature| —| Banana 4 mm, Pt1000 (2-wire)
Temperature compensation for pH| -5 .. 105 °C (or 23 .. 221 °F)
---|---
Input resistance pH| approx. 1012 Ohm
Measuring cycle| approx. 2 measurements per second
Display| 3-line segment LCD, additional symbols, illuminated (white, luminous duration adjustable)
Standard functions| Min/max/hold
pH calibration| Manual 1- or 2-point or automatic 2-point calibration
Temperature adjustment| Offset and gradient correction
Housing| Break-proof ABS housing
| Protection rating| IP65 / IP67 (only with electrodes identified as waterproof in the connected state for devices with BNC connection)
Dimensions LWH| 108 54 28 mm, without BNC socket or kink protection
Weight

(G 1500 / G 1501)

| ~  130 / 135 g incl. batteries, without electrode

~  180 / 185 g incl. batteries and electrode GE 114

(without backlighting)

Battery indicator| 4-stage battery status indicator,

Replacement indicator for depleted batteries: “BAT”

Auto-power-OFF function| The device switches off automatically if this is activated
Directives and standards| The devices conform to the following Directives of the Council for the harmonization of legal regulations of the Member States:

2014/30/EU EMC Directive 2011/65/EU RoHS

Applied harmonized standards:

EN 61326-1:2013  Emission limits: Class B

Immunity according to Table 1 Additional errors: < 1 % FS

EN IEC 63000:2018

The device is intended for mobile use and/or stationary operation in the scope of the specified operating conditions without further limitations.

200 µS/cm

| pH 0-14, 0..70 °C,

200 µS/cm

| pH 0-14, 0..80 °C,

150 µS/cm

Reference electrolyte:| 3 mol/l KCl (gel)| 3 mol/l KCl (gel)| 3 mol/l KCl (gel)
Diaphragm type:| 1x Pellon| 1x ceramic| 1x ceramic
Membrane shape:| sphere| cylinder| cone
Tube:| epoxy, approx. Ø12 x 120 mm| epoxy, approx. Ø12 x 120 mm| PC, approx. Ø12 x 130 mm
Connection:| BNC| BNC, 4 mm banana| BNC, 4 mm banana

Disposal
Separation by material and recycling of device components and packaging must take place at the time of disposal. The valid regional statutory regulations and directives
applicable at the time must be observed.

NOTE
The device must not be disposed of with household waste. Return it to us, freight prepaid. We will then arrange for the proper and environmentally friendly disposal. Private end users in Germany have the possibility of dropping off the device at the municipal collection center. Batteries must be removed beforehand! Please dispose of empty batteries at the collection points intended for this purpose.

Service

Manufacturer
If you have any questions, please do not hesitate to contact us: Contact.

• GHM Messtechnik GmbH
• GHM GROUP – Greisinger
• Hans-Sachs-Str. 26
• 93128 Regenstauf | GERMANY
• Email: info@greisinger.de | www.greisinger.de.
• WEEE reg. no. DE 93889386

Accessories

Electrodes / sensors

Pt1000 temperature sensor
GE 135 – BNC| art. no. 483292| Universal pH electrode with integrated Pt1000 temperature sensor
GR 105 – BNC| art. no. 607798| Universal redox electrode
GF 1T-T3-B-BS| art. no. 611088| Pt 1000 probe with silicone handle

Accessories

with punched lining for 1 device of the G1xxx-series

GKK 252| art. no. 601056| Case (235 x 185 x 48 mm),

with foam lining for universal use

GKK 1001| art. no. 611604| Case (395 x 295 x 106 mm),

universal for water analysis G1xxx series

References

• Senseca Germany GmbH - Business Unit Portable

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