Greisinger GMH 3530 User guide

H33.0.02.6C-09

Measuring device for pH / Redox
temperature

as of version V2.6 Operating Manual GMH 3530

GREISINGER electronic GmbH

D - 93128 Regenstauf, Hans-Sachs-Straße 26

 +49 (0) 9402 / 9383-0  +49 (0) 9402 / 9383-33  [e-mail]

H33.0.02.6C-09 Operating Manual GMH 3530 page 2 of 14

Index

MEASURING DEVICE FOR PH / REDOX TEMPERATURE .................................................................................. 1

1 DESIGNATED USE ................................................................................................................................................. 2

2 GENERAL NOTE .................................................................................................................................................... 2

3 OPERATING AND MAINTENANCE ADVICE: ....................................................................................................... 3

4 SAFETY REQUIREMENTS: ................................................................................................................................... 3

5 DISPLAY AND CONTROL ELEMENTS ................................................................................................................. 4

5.1 DISPLAY ELEMENTS ............................................................................................................................................ 4

5.2 PUSHBUTTONS ................................................................................................................................................... 4

5.3 CONNECTIONS .................................................................................................................................................... 4

6 CONFIGURATION .................................................................................................................................................. 5

7 MANUAL SETTING OF TEMPERATURE WHEN OPERATING DEVICE WITHOUT TEMPERATURE PROBE 6

8 MANUAL SETTING OF PH-VALUE FOR MEASURING FUNCTION RH ............................................................. 6

9 CALIBRATION OF ’PH’-MEASUREMENT ............................................................................................................ 6

9.1 HOW TO PREPARE CALIBRATION SOLUTIONS OF STANDARD SERIES ........................................................................ 7

9.2 NOTE: AUTOMATIC TEMPERATURE COMPENSATION DURING CALIBRATION.............................................................. 7

9.3 HOW TO CARRY OUT CALIBRATION ....................................................................................................................... 7

10 INDICATION OF ELECTRODE STATE (FOR PH-MEASUREMENTS ONLY) .................................................. 9

11 HOW TO PERFORM A RH-MEASUREMENT .................................................................................................... 9

12 ERROR AND SYSTEM MESSAGES ................................................................................................................ 10

13 THE PH-ELECTRODE ...................................................................................................................................... 11

13.1 VARIOUS APPLICATIONS REQUIRE SPECIAL ELECTRODES ................................................................................. 11

14 THE REDOX-ELECTRODE ............................................................................................................................... 12

15 THE SERIAL INTERFACE ................................................................................................................................ 13

15.1 THE FOLLOWING INTERFACE FUNCTIONS WILL BE SUPPORTED:......................................................................... 13

15.2 FUNCTIONS FOR THIS DEVICE ONLY (DLL-248) ............................................................................................... 13

16 SPECIFICATION: .............................................................................................................................................. 14

17 DISPOSAL INSTRUCTION: .............................................................................................................................. 14

1 Designated Use

This device is designed for the measurement of pH and redox potentials. Therefore a suitable electrode is needed.
The electrode is connected via BNC-socket.

Please note: You need different types of electrodes for pH and redox measurement.

Additionally a temperature probe can be connected (Pt100, with suitable MINI-DIN plug).
This enables the automatic temperature compensation (ATC) for pH measurements.
The temperature of the measured solution can also be displayed. .

2 General Note

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

H33.0.02.6C-09 Operating Manual GMH 3530 page 3 of 14

3 Operating and Maintenance Advice:

a) When to replace battery:

If and ´bAt´ are shown in the lower display the battery has been used up and needs to be replaced. The de­vice will, however, operate correctly for a certain time.
If ´bAt´ is shown in the upper display the voltage is too low to operate the device; the battery has been completely
used up.

Please note: The battery has to be taken out, when storing device above 50°C.

We recommend to take out battery if device is not used for a longer period of time.

b) Treat device and sensor carefully. Use only in accordance with above specification. (do not throw, hit against etc.).

Protect plug and socket from soiling.

c) When connecting the temperature probe the connector may not lock to the jack correctly. In such a case hold the

connector not at the case but at the buckling protection of the cable during the plug in. Don’t connect electrode

canted! If plug is entered correctly, it will slide in smoothly.

To disconnect temperature probe do not pull at the cable but at the plug.
If plug is entered incorrectly the connecting pins of the plug can be damaged. => Plug can no longer be used and

connecting cable needs to be replaced.

d) Mains operation:

When using a power supply device please note that operating voltage has to be 10.5 to 12 V DC.
Do not apply overvoltage!! Cheap 12V-power supply devices often have excessive no-load voltage. We, there­fore, recommend using regulated voltage power supply devices. Trouble-free operation is guaranteed by our
power supply devices. Trouble-free operation is guaranteed by our power supply, GNG10/3000.
Prior to connecting the plug power supply device with the mains supply make sure that the operating voltage
stated at the power supply device is identical to the mains voltage.

e) Display values for damaged electrode cable or if no pH or redox-electrode has been connected

If no electrode is connected or the connection cable is damaged the display will nevertheless show mV, pH or rH
values. Please note that these values can never be correct measuring results!

4 Safety Requirements:

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".

2. If the device is transported from a cold to a warm environment condensation may cause 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.

3. If device is to be connected to other devices (e.g. via serial interface) the circuitry has to be designed most care­fully. Internal connection in third party devices (e.g. connection GND and earth) may result in not-permissible vol­tages impairing or destroying the device or another device connected.

Warning: If device is operated with a defective mains power supply (short circuit from mains voltage to output

voltage) this may result in hazardous voltages at the device (e.g. sensor socket, serial interface).

4. 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.

5. Warning: 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.

.

H33.0.02.6C-09 Operating Manual GMH 3530 page 4 of 14

Main display: pH-value, redox-value (mV, mVH), rH
value or user prompt

Display elements to show minimum/maximum/
memorized measuring value

Display of measuring units

Warning signal (low battery or recalibration prompt)

ATC-arrow: indicates if temperature sensor has been

connected, i.e. if automatic temperature
compensation is active, when operating in

the pH, mVH or rH mode.

ok-arrow: indicates that measuring value has been sta-

ble for a longer period of time

CAL-arrow: indicates that device is being calibrated at

the moment, when operating in the pH
mode.

Secondary display: measuring value, temperature

or user prompt

On/off key

+

min/max when taking measurements:

press shortly: min. or max. meas. value so far will be

displayed

press for 2 sec.: the min. or max. value will be deleted

Configuration: to enter values, or
change settings

CAL: for ’pH’ mode only:
press shortly: display state of electrode condition and

calibration data

press for 2 sec: start pH-calibration

Set/Menu:

press (Set) shortly: for ’pH’ and ’mVH: manual tempera-

ture input if no temperature probe is con-

nected additionally for ’rH’: manual input of

pH value.

press (Menu) for 2 sec: configuration will be activated

Store/Quit:
measuring: holds and memorizes current meas. value

(’HLD’ in display)

Configuration: enter setting, return to measuring

interface: connection for galv. Isolated interface adapter

(accessory: GRS 3100, GRS3105 or USB3100)

BNC-socket: connection for pH- or redox-electrode

Mini-DIN-socket: connection for Pt100-temperature probe

(4-wire connection; 2-wire also possible, but may result in additional mea­suring faults due to cable)

The mains socket is located at the left side of the instrument

1 2 3

4 5 6

ON
OFF

max

Store

CAL

min

Set

Menu Quit

pHmV mV

H

rH

ATC ok CAL AL Logg pH

mbar

5 Display and control elements

5.1 Display elements

5.2 Pushbuttons

5.3 Connections

H33.0.02.6C-09 Operating Manual GMH 3530 page 5 of 14

pH:

pH-measurements with pH-electrode

mV:

redox measurements with redox-electrode

mVH:

redox measurement with redox-electrode (with standard 3 mol/l KCL elec­trolyte).
The value shown is corrected to the standard hydrogen system (0 - 50°C:
acc. to DIN 38404).
Temperature probe (ATC) or manual temperature input required.

rH:

rH-measurement: the rH value is calculated from the measured values of
pH, redox and temperature. You may also enter pH and temperature val­ues manually.

thEr:

Pt100 thermometer: the current temperature is displayed in the main dis­play, the secondary display either shows the min. or max. value or is used
for the hold-function.

2-Pt:

the pH-electrode will be calibrated at 2 points (one calibration point in
neutral range and one calibration point in acid or basic range)

3-Pt:

the pH-electrode will be calibrated at 3 points (one calibration point in
neutral, acid and basic range)

°C

All temperature values in degree Celsius

°F:

All temperature values in degree Fahrenheit

-10.0°C ... 10.0°C
or

-18.0°F ... 18.0°F

The zero point of the temperature measurement will be dis­placed by this value to compensate for deviations in the
sensor and measuring device:

temperature displayed = temperature measured - offset

off:

Zero shift has been deactivated (=0.0°)

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, e.g. for
mains operation)

pHmV mV

H

rH

ATC ok CAL AL Logg pH

mbar

max

min

2

5

pHmV mV

H

rH

ATC ok C AL AL Logg pH

mbar

max

min

2

5

pHmV mV

H

rH

ATC ok CAL AL Logg pH

mbar

max

min

2

5

ﾰC

pHmVmV

H

rH

ATC ok CAL AL Logg pH

max

min

2

5

pHmV mV

H

rH

ATC ok CAL AL Logg pH

mbar

max

min

2

5

6 Configuration

To configurate the device press -key for 2 seconds.
Press the -key again to choose between the individual values that can be set.
The individual values are changed by pressing the keys or .

Use to leave configuration menu and save your settings.

’Input’: Selection of Measuring Function pH / Redox mV / Redox mVH / rH / thEr

The current measuring function can be identified by an arrow at the top of the display:

’CAL’: Selection of Number of Calibration Points (for pH measurements only)

’Unit’: Selection of Temperature Unit °C /°F

’Offset’: Zero Shift of Temperature

Note: If the temperature offset is set, this is displayed when the device is turned

on.

’Power.off’: Selection of Power-off Delay