H61.0.12.6C-03
User’s Manual MH3111
page 6 of 8
3 Measuring Of Water Level – Display Unit [m]
When using suitable waterproof pressure sensors the unit [m] for meters of water can be set in the menu
“Unit“. 10m of water are roughly 1 bar over pressure. Measurings can be made e.g. like described below :
•
With one abs. pressure sensor (SL oFF!): Press ‚Tara‘ when sensor is at ambient air and then bring
sensor to the depth to be measured. The display shows now the depth in [m].
•
With one rel pressure sensor: bring tube connection for lower press. in contact to ambient air by means
of a tube (no water contact!) and bring the sensor with its open press. connection for higher pressure to
water depth to be measured (display and is compensated for pressure changes in ambient air).
4 The Serial Interface
By means of the serial interface and a suitable electrically isolated interface adapter (GRS3100, GRS3105 or
USB3100) the device can be connected to a computer for data transfer. With the GRS3105 up to 5 devices
of the MH3xxx- series can be connected to one interface (see also manual of GRS3100, GRS3105 or
USB3100). To avoid transmission errors, there are several security checks implemented e.g. CRC.
The following standard software packages are available:
EBS9M
:
9-channel software to display the measuring values
EASYCONTROL
: Universal multi channel software (EASYBUS-, RS485-, or MH3000- operation
possible) for real-time recording and presentation of measuring data of one MH3xxx
device in the ACCESS®-data base format
In case you want to develop your own software we offer a
MH3000-development package
including:
•
a universally applicable Windows functions library ('MH3000.DLL') with documentation that can be used
by the most programming languages.
•
Programming examples Visual Basic 4.0, Testpoint (Keithley Windows measuring software)
The device has 1 channel:
-
Channel 1: current measuring value (base address)
Note:
The measuring display range values read back from the interface are always in the
selected measurement unit (mbar, bar...)!
Supported functions:
Code
Name/Function
Code
Name/Function
0
Read measurement value
200
Read min display range
3
Read system state
201
Read max display range
6
Read min value
202
Read display range - unit
7
Read max value
204
Read display range - decimal point
12
Read ID number
208
Read # of channels
176
Read min measuring range
214
Read Scale adjustment[%]
177
Read max measuring range
216
Read Offset adjustment
178
Read measuring range unit
222
Read power off time (Conf-P.oFF)
179
Read measuring range decimal point 223
Set power off time (Conf-P.oFF)
180
Read kind of measuring of sensor
240
Reset
199
Read kind of measuring of display
254
Program version
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+49 5605 803-0 •
+49 5605 803-54 •
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