User manual
H61.0.2X.6B-01 User’s Manual GMH 3210 page 8 of 12
7 Remarks to Special Functions
7.1 Display Resolution
Standard setting: 'Auto', i.e. the device automatically switches over to the optimum resolution between 1°
and 0.1°.
If temperatures to be measured are near the switching threshold, a fixed resolution may be better, e.g. for
easy recording. In such a case please select the optimum resolution manually.
Independent from this setting, type S measurings are always in 1° resolution!
7.2 Power off Time
If there won’t be pressed any key and no interface communication takes place for the time of the power off
time setting (P.Off), the device will be switched off automatically to save battery power.
If P.oFF = oFF then the automatic switch off is deactivated.
7.3 Min-/Max-value memory, Hold function
• Min-/Max-value memory: the max. and the min. value will be memorised.
• Hold function: Press button 6 to store current value.
For more Information please refer to chapter 4.2
8 Output
The output can be used as serial interface (for USB 3100, USB 3100 N, GRS 3100 or GRS 3105 inter-
face adapters) or as analog output (0-1V).
If none of both is needed, we suggest to switch the output off, because battery life then is extended.
8.1 Serial Interface
By means of the serial interface and a suitable electrically isolated interface adapter (USB 3100, USB 3100
N, GRS 3100 or GRS 3105) the device can be connected to a computer for data transfer.
With the GRS 3105 up to 5 devices of the GMH3xxx- series can be connected to one interface (see also
manual of GRS 3105). As a precondition the base addresses of all devices must not be identical, make
sure to configure the base addresses accordingly (refer menu point “Adr.” in chapter 6).
To avoid transmission errors, there are several security checks implemented e.g. CRC.
The following standard software packages are available:
GMHKonfig: Software for a comfortable editing of the device (e.g. Material selection…)
EBS 20M / 60M: 20-/60-channel software to display the measuring values
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 that can be
used by the most programming languages. Suitable for Windows XP™, Windows Vista™, Windows 7™
Programming examples Visual Basic 4.0™, Delphi 1.0™, Testpoint™
Note: The measuring and range values read via interface are always in the selected display unit
(°C/°F)!
Supported interface functions:
Code
Name/Function
Code
Name/Function
0
Read nominal value
201
Read max. display range
3
Read system status
202
Read unit of display
6
Read min. value
204
Read decimal point of display
7
Read max. value
208
Read channel count
12
Read ID-no.
216
Read offset correction
174
Delete min. value
217
Set offset correction
175
Delete max. value
218
Read corr. Factor (950..1200)
194
Set display unit
219
Set corr. factor (950..1200)
195
Set decimal point in display (255=Auto)
240
Reset
199
Read meas. type in display
254
Read program identification
200
Read min. display range