H60.0.11.6C-16
Operating Manual GMH 3830
Page 10 of 18
_____________________________________________________
_____________________________________________________________________________
7 Output
The output can be used as serial interface (for GRS3100 or GRS3105 interface adapters) or as analogue
output (0-1V). If none of both is needed, we suggest to switch the output off, battery life then is extended.
7.1 Interface - Base Address ('Adr.')
By using an electrically isolated interface converter USB3100, GRS3100 or GRS3105 (accessory) the device
can be connected to a PC.
With the GRS3105 it is possible to connect up to 5 instruments of the GMH3000 family to a single interface
(please also refer to GRS3105-manual). 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 4.
In order to avoid transmission errors, there are several security checks implemented (e.g. CRC).
The following standard software packages are available for data transfer:
EBS20M/ -60M
:
20- / 60-channel software to record and display the measuring values
GMHKonfig
:
Software for a comfortable editing of the device (e.g. Material selection
…)
In case you want to develop your own software we offer a
GMH3000-development package
including
-
an universally applicable 32bit Windows functions library ('GMH3000.DLL') with documentation that can
be used by all 'serious' programming languages.
-
Programming examples for Visual Basic 6.0™, Delphi 1.0™, Testpoint™, Labview™
The Device has 2 Channels:
-
Channel 1: Material-moisture in % and base-address
-
Channel 2: Temperature
Supported Interface-functions:
1
2
Code
Name/Function
1
2
Code
Name/Function
x X 0
read nominal value
x x 202
read unit of display
x X 3
read system status
x x 204
read decimal point of display
x
12
read ID-no.
x
205
read extended measuring type in display
x X 176
read min measuring range
x
208
read channel count
x X 177
read max measuring range
x x 214
read scale correction
x X 178
read measuring range unit
x x 215
set scale correction
x X 179
read measuring range decimal point
x x 216
read zero displacement
x X 180
read measuring type
x x 217
set zero displacement
X 194
set display unit
x
222
read turn-off-delay
x X 199
read measuring type in display
x
223
Set turn-off-delay
x X 200
read min. display range
x
240
Reset
x X 201
read max. display range
x
254
read program identification
The measuring and range values read via interface are always in the selected display
unit (°C/°F)!
7.2 Analogue Output
– Scaling with DAC.0 and DAC.1
With the DAC.0 and DAC.1 values the output can be rapidly scaled to Your efforts.
Keep in mind not to connect low-resistive loads to the output, otherwise the output value will be wrong and
battery life is decreased. Loads above ca 10kOhm are uncritical.
If the display exceeds the value set by DAC.1, then the device will apply 1V to the output
If the display falls below the value set by DAC.0, then the device will apply 0V to the output
In case of an error (Err.1, Err.2, no sensor, etc.) the device will apply slightly above 1V to the output.
Plug wiring:
GND
The 3
rd
contact has to be left floating!
Only stereo plugs are allowed!
+Uout
8
Application in the glued timber construction acc. to DIN 1052-1 (MPA certified)
The instrument with its curve h.460 (Fir) was certified by the MPA Stuttgart (Otto Graf institute) for
applications in the glued timber construction according to DIN 1052-1 with the following equipment:
-
measuring cable GMK38
-
reciprocating piston electrode GHE91 (recommended) or impact electrode GSE91
