GREISINGER GMH 3430 User manual

H34.0.01.6C-11
GREISINGER electronic GmbH
D - 93128 Regenstauf, Hans-Sachs-Straße 26
+49 (0) 9402 / 9383-0 +49 (0) 9402 / 9383-33 [email protected]
Measuring device for conductivity
temperature
as of version V2.1 Operating Manual GMH 3430
WEEE-Reg.-Nr. DE93889386

H34.0.01.6C-11 Operating Manual GMH 3430 page 2 of 10
Index
1DESIGNATED USE.................................................................................................................................................2
2GENERAL NOTE....................................................................................................................................................2
3OPERATING AND MAINTENANCE ADVICE........................................................................................................3
4SAFETY REQUIREMENTS ....................................................................................................................................3
5DISPLAY AND CONTROL ELEMENTS.................................................................................................................4
5.1 DISPLAY ELEMENTS ............................................................................................................................................4
5.2 PUSHBUTTONS ...................................................................................................................................................4
5.3 CONNECTIONS....................................................................................................................................................4
6SELECTION OF MEASURING UNIT .....................................................................................................................5
7CHANGE BETWEEN MEASURING RANGE RESOLUTIONS..............................................................................5
8SALINITY MEASURING:........................................................................................................................................5
9ANZEIGEN BEIM GERÄTE-NEUSTART...............................................................................................................5
10 CONFIGURATION ..................................................................................................................................................6
11 MINIMUM AND MAXIMUM VALUES .....................................................................................................................7
12 THE CONDUCTIVITY MEASURING CELL............................................................................................................8
13 ERROR AND SYSTEM MESSAGES .....................................................................................................................8
14 THE SERIAL INTERFACE......................................................................................................................................9
14.1 THE FOLLOWING INTERFACE FUNCTIONS WILL BE SUPPORTED ...............................................................................9
15 SPECIFICATION...................................................................................................................................................10
16 DISPOSAL INSTRUCTION: .................................................................................................................................10
1 Designated Use
The device is designed for conductivity measurements.
Additionally resistivity, TDS (Filtrate dry residue) and salinity measurements can be done.
A cable permanently connects the electrode to the device.
Field of application:
Soft and salt water aquaristics
Fish framing
Checking of drinking water
etc...
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.

H34.0.01.6C-11 Operating Manual GMH 3430 page 3 of 10
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 de-
vice 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, there-
fore, 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.
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 func-
tion. 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 care-
fully. 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.

H34.0.01.6C-11 Operating Manual GMH 3430 page 4 of 10
5 Display and control elements
5.1 Display elements
Main display: conductivity, resistivity, filtrate dry resi-
due (TDS), salinity or user prompt
MAX/MIN/HLD: display elements to show mini-
mum/maximum/
memorized measuring value
Display of measuring units for main display
Warning signal:indicates low battery
Units for configuration settings
Lin/nLF-arrow: indicates set temperature compensation
Secondary measuring value temperature or
Display: configuration settings
Measuring value units for temperature
5.2 Pushbuttons
On/off key
+
min/max when taking measurements:
press shortly: indication of min. or max. value meas-
ured so far as well as corresponding
temperature
press for 2 sec.: the corresponding value is deletes
Configuration: to enter values or change settings
Range: (for conductivity measuring only)
press for 2 sec.: change between automatic and manual
measuring range selection
press shortly (at manual measuring range selection):
change next higher measuring range or
change from highest to smallest meas-
uring range
Set/Menu:
press shortly (Set): change-over between measuring
units: conductivity, resistivity of fluid,
filtrate dry residue (TDS) and salinity
press for 2 sec. (Menu): configuration will be activated
Store/Quit:
measurement: holding of current meas. value ('HLD' in
display)
Set/Menu: acknowledge setting, return to measuring
5.3 Connections
Interface: Connection for electrically isolated interface adaptor
(accessories: GRS 3100, GRS3105 o. USB3100)
Electrode: cable gland for fixed conductivity electrode
The mains socket is located at the left side of the instrument.
MAX DIF
MIN HLD
%
°C
°F
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
1 2 3
4 5 6
ON
OFF max Range
Storemin
Set
Menu Quit

H34.0.01.6C-11 Operating Manual GMH 3430 page 5 of 10
6 Selection of Measuring Unit
The device allows a choice between the various measuring units, i.e. conductivity, resistivity of fluid, filtrate dry resi-
due ('Total Disolved Solids') and salinity. To do so press -key for a short time. The measuring value of the current
measuring unit will be shown in the upper line of the display, the corresponding device will be indicated by an arrow
at the top corner of the display. Simultaneously, the temperature is shown in the lower line of the display with all
measuring units.
7 Change Between Measuring Range Resolutions
For measuring conductivity you have a choice between four different measuring range resolutions:
0.0 ... 200.0 S/cm
0 ... 2000 S/cm
0.00 ... 20.00 mS/cm
0.0 ... 200.0 mS/cm
If Auto-Range is switched on the GMH3430 will automatically choose the optimum resolution. If Auto-Range is
switched off you can change to the next measuring range resolution by pressing the -key for a short time.
In case you have already been working in the highest resolution range, pressing of the key will bring you down to the
lowest measuring range resolution. The corresponding measuring unit is shown by an arrow in the top right-hand
corner of the display.
To activate/deactivate Auto-Range press -key press for 2 seconds.
The Auto-Range function set will be shown in the display as long as the -key is being
pressed.
8 Salinity measuring:
The salinity (salt content) of seawater can be determined in the measuring mode „SAL“
(basis: International Oceanographic Tables; IOT)
The salinity of standard-seawater is 35 ‰ ( 35g salt per 1kg seawater).
The values are displayed in ‰ (g/kg).
9 Display at reboot
After the device is switched on it will display some information about the current configuration.
There are the following displays:
segment test
set scale correction of measuring cell
set compensation coefficient
(only displayed if t.Cor = lin)
set temperature offset
(not displayed if OFFS = off)
setting for Autorange
Then 0 is displayed until the first valid measuring value is available.
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm

H34.0.01.6C-11 Operating Manual GMH 3430 page 6 of 10
10 Configuration
For configuration of the device press -key for 2 seconds.
Choose between the individual values that can be set by pressing the - key again.
The individual values are changed by pressing the keys or .
Use to leave configuration and to store settings.
’t.Cor’: Selection of Temperature Compensation
off:
no temperature compensation selected
nLF:
non-linear temperature compensation for natural water
acc. to EN27888 (DIN 38404).
to measure ground water, surface water, drinking water and purest water
Lin:
linear temperature compensation
for other aqueous solutions
For TDS value measurements, non-linear temperature compensation for natural water is used (ref-
erence temperature = 25°C).
To measure salinity the instrument automatically switches over to the non-linear temperature com-
pensation acc. to IOT (reference temperature = 15°C).
’t.Lin’: Setting of Temperature Coefficient (only when t.Cor = Lin)
0.300 … 3.000:
Temperature compensation coefficient in %/K.
’t.rEF’: Selection of Reference Temperature (only when t.Cor = nLF or Lin)
20°C / 68°F:
reference temperature 20°C (68°F)
25°C / 77°F:
reference temperature 25°C ( 77°F)
’C.tdS’: Setting of TDS-factor
0.40 … 1.00:
calculation factor for TDS-measurements
The calculation factor depends on the composition of the medium and has to be
determined for each type of water.
Displayed value = Conductivity [µs/cm, NLF-compensated at 25°C] * TDS-factor
’SCL’: Setting of Scale Correction of Measuring Cell
0.800 … 1.200:
scale correction of measuring cell
The cell constant may change due to natural ageing or depositions at the fixed
measuring cell. In case you have an accurate reference liquid, you may adjust the
device by changing the scale correction accordingly.
Factory setting of the scale correction is 1.000.
max
min
2
5
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
max
min
2
5
°C
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
max
min
2
5
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
max
min
2
5
max
min
2
5

H34.0.01.6C-11 Operating Manual GMH 3430 page 7 of 10
’Unit’: Selection of Temperature Unit °C /°F
°C
All temperature values in degrees Celsius
°F:
All temperature values in degrees Fahrenheit
’Offset’: Selection of Temperature Offset
-2.0°C ... 2.0°C
or
-3.6°F ... 3.6°F
The zero point of the temperature measurement will be dis-
placed by this value:
temperature displayed = temperature measured - offset
The offset is used to compensate for deviations.
off:
Zero displacement has been deactivated (=0.0°)
’Power.off’: Selection of Power-off Delay
1...120:
Power-off delay in minutes. The instrument 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. in
case of mains operation)
’Address’: Selection of Base Address
01, 11, 21, ..., 91:
Base address for interface communication.
Channel 1 will be addressed by the base address set, chan-
nels 2 and 3 will have the following addresses.
(Example: base address 21 - channel 1 = 21, channel 2 = 22, channel 3 = 23)
Using the interface converter GRS3105 it is possible to connect several devices to a single interface. As a precondi-
tion the base addresses of all devices must not be identical. In case several devices will be connected via one inter-
face make sure to configurate the base addresses accordingly.
11 Minimum and Maximum Values
The min. or max. value of the current measuring unit will be shown in the upper line of the
display after the - or -keys have been pressed for a short time.
The lower display line will simultaneously show the temperature at which the max./min.
value for conductivity or resistivity, filtrate dry residue, salinity has occurred.
To switch over between the max./min. values of the measuring units press for a short
time.
Max./min. values for conductivity, filtrate dry residue and salinity will be recorded even
though the measuring unit is not shown in the display at the moment.
To delete max./min. values press -key or -key for approx. 2 seconds.
°C
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
max
min
2
5
°C
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
max
min
2
5
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
max
min
2
5
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm
max
min
2
5
MAX °C
S
Logg %/K AL
mS
nLF
SAL mg/l
1/cm
Lin
kOhm

H34.0.01.6C-11 Operating Manual GMH 3430 page 8 of 10
12 The Conductivity Measuring Cell
During the measurement, the conductivity measuring cell must be dipped into so far, that at least 30mm beginning
from the top of the measuring cell, is located in the medium.
The maximum immersion depth for continuous operation should be 110mm.
The measuring cell can either be stored dry or in water. After dry storage wetting time will be prolonged slightly. If
changing over from one liquid to another with conductivities varying widely make sure to properly rinse and shake
dry measuring cell.
Measuring cell must never come into contact with water-repellent materials such as oil or silicone.
If conductivity measured is much higher or lower than expected this may be due to the electrode being soiled with
nonconducting or conducting foreign materials. Measuring cell has to be cleaned with a watery soap solution.
When measuring media with low conductivities the electrode has to be moved sufficiently.
13 Error And System Messages
Error or system
messages:
Description / Reason:
Remedy:
Low battery voltage
device will only continue operation for
a short time
replace battery
Low battery voltage
replace battery
- If mains operation: wrong voltage
replace power supply, if fault continues to exist:
device damaged
No display
or
mazy characters
- Battery voltage too low
replace battery
- If mains op.: power supply defective
or wrong voltage/polarity
check/replace mains supply
- System error
disconnect battery or power supply, wait for a
short time, re-connect
- Device defective
return to manufacturer for repair
Values exceeding measuring range
Check: are there any values exceeding the
measuring range specified?
-> meas. device not suitable
Electrode/sensor/cable defective
-> replace electrode/probe
Values below measuring range
check: are there any values below the measur-
ing range specified?
-> meas. device not suitable
Electrode/sensor/cable defective
-> replace electrode/probe
System fault
Disconnect battery, wait for 10 sec., switch on
again: if fault continues to exist, device is dam-
aged
-> return to manufacturer for repair
Value could not be calculated
A measuring variable device required for calcu-
lation is faulty (overflow/underflow)
30 mm
110 mm

H34.0.01.6C-11 Operating Manual GMH 3430 page 9 of 10
14 The serial interface
All measuring data and settings of the device can be read and changed by means of the serial interface and a suit-
able electrically isolated interface adapter (GRS3100, GRS3105 or USB3100).
In order to avoid faulty transmission, we have designed elaborate security measures for interface communication.
The following standard software packages are available for data transfer:
- EBS9M 9-channel software to display the measuring value (channel 1) and the temperature (ch. 2)
- EASYCONTROL: Universal multi-channel software (EASYBUS-, RS485-, or GMH3000- operation possible) for
real-time recording and presentation of measuring data in the ACCESS®-data base format.
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 ‘es-
tablished’ programming languages, suitable for:
Windows 95™, Windows 98™, Windows NT™, Windows 2000™, Windows XP™, Windows Vista™.
- Programming examples Visual Basic 4.0, Delphi 1.0, Testpoint
If you want to use the interface functions make sure to switch off
the Auto-Range function.
14.1 The following interface functions will be supported
DLL-
Code
Name / function
Operating
mode
Conduc-
tivity
Tempera-
ture
Resistance
TDS
Salinity
Channel
1
2
3
4
5
x
x
x
x
x
0
Read nominal value
x
x
x
x
x
3
Read system status
x
*1
x
x
x
6
Read min. value
x
*2
x
x
x
7
Read max. value
x
12
Read ID no.
x
174
Delete min. value
x
175
Delete max. value
x
x
x
x
x
176
Read min. measuring range
x
x
x
x
x
177
Read max. measuring range
x
x
x
x
x
178
Read unit for measuring range
x
x
x
x
x
179
Read decimal pt. for measuring range
x
x
x
x
x
180
Read measuring type
x
194
Set display unit
x
195
Set decimal point of display
x
x
x
x
x
199
Read meas. type in display
x
x
x
x
x
200
Read min. display range
x
x
x
x
x
201
Read max. display range
x
x
x
x
x
202
Read unit of display
x
x
x
x
x
204
Read decimal point of display
x
208
Read channel count
x
216
Read offset correction
x
217
Set offset correction
x
222
Read power-off delay
x
223
Set power-off delay
x
240
Reset instrument
x
254
Read program identification
*1 = temperature of the min conductivity value
*2 = temperature of the max conductivity value

H34.0.01.6C-11 Operating Manual GMH 3430 page 10 of 10
15 Specification
Measuring units: Display ranges: Resolution:
Conductivity: 0.0 … 200.0 µS/cm 0.1 µS/cm
0 … 2000 µS/cm 1 µS/cm
0.00 … 20.00 mS/cm 0.01 mS/cm
0.0 … 200.0 mS/cm 0.1 mS/cm
Resistivity of Fluid: 0.005 … 100.0 kOhm *cm 0.001 kOhm*cm, 0.01 kOhm*cm or 0.1 kOhm*cm
Filtrate dry residue (TDS): 0 .. 1999 mg/l 1 mg/l
Salinity: 0.0.. 70.0 0.1
Temperature: -5.0 ... +100.0 °C 0.1 °C or 0.1 °F
Accuracy: (at nominal temperature = 25°C, ±1digit)
Conductivity: ±0.5 % of m.v. ±0.3 % FS or ±2 mS/cm
Resistivity of Fluid: ±0.5 % of m.v. ±0.3 % FS
Filtrate dry residue (TDS): ±0.5 % of m.v. ±0.3 % FS
Salinity: ±0.5 % of m.v. ±0.3 % FS
Temperature: ±0.2 % of m.v. ±0.3 K
Cell correction: to be set from 0.8 .. 1.2
Temperature compensation: select between
- linear temperature compensation with compensation factor from 0.3 to 3.0 %/K
- non-linear temperature compensation according to EN 27888 (DIN 38404),
reference temperatures 20°C and 25°C
or no temperature compensation
Working temperature: device: 0 to +50 °C / 0 to +95 % RH (non condensing)
meas. cell: -5 to +80 °C (peaks up to 100 °C)
Storage temperature: -20 to +70 °C
Interface: Serial interface (3.5mm jack), serial interface can be connected to RS232 or USB inter-
face of a PC via electrically isolated interface adapter GRS3100, GRS3105 or
USB3100 (accessories).
Min-/max-value memory: Max- and min- pair of values: highest and lowest value of each measuring type (conduc-
tivity, resistivity, TDS and salinity) is safed together with the corresponding temperature
Power supply: 9V-battery, type IEC 6F22 (included) or additional d.c. connector (internal pin Ø 1.9 mm)
for external 10.5-12V direct voltage supply (suitable power supply: GNG10/3000)
Power consumption: approx. 3.5 mA
Low battery warning: and ’ bAt ’
Display: 2 four-digit LCD-displays (12.4mm and 7mm high) for meas. values, min. and max.
values HOLD-function etc. as well as additional pointing arrows
Pushbuttons: 6 membrane keys for on/off switch, selection of measuring range resolution, min. and
max. value memory, HOLD-function etc.
Automatic-power-off-function: The instrument will be automatically switched off if no key is pressed/no interface com-
munication takes place for the time of the power-off delay. The power-off delay can be
set to values between 1 and 120 min.; it can be completely deactivated.
Housing: 142 x 71 x 26 mm (L x W x D), impact-resistant ABS plastic housing, membrane key-
board, transparent panel. Front side IP65, integrated pop-up clip for table top or sus-
pended use.
Weight: approx. 225 g (incl. battery and measuring cell)
Measuring cell: Two-electrode-conductivity-measuring cell with integrated temperature sensor
Electrode material: special graphite
Collar material: polysulfon
Dimensions: dia. 12 mm, length 120 mm
Warranty: 2 years for device electronics, 1 year for conductivity measuring cell
EMV: The device corresponds to the essential protection ratings established in the Regula-
tions of the Council for the Approximation of Legislation for the member countries re-
garding electromagnetic compatibility (2004/108/EG). Additional fault: <1%
16 Disposal instruction:
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.
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