H83.0.02.6C-10
Operating manual GMH 5430
page 12 of 18
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GHM GROUP
– Greisinger | GHM Messtechnik GmbH
Hans-Sachs-Str. 26 | 93128 Regenstauf | GERMANY
Phone +49 9402 9383-0 | Fax +49 9402 9383-33
www.greisinger.de
|
e
8 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:
1: external 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.
8.1 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.
9 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)
