H31.0.31.6C-06
User’s Manual GMH3150
page 10
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6 Pressure Connection To The Sensors
The device is designed to be connected to the sensors of the GMSD...-series without a new calibration being
necessary. Therefore a great variety of replaceable sensors of e.g. –1.999...2.500 mbar relative up to
0...400.0 bar absolute pressure can be connected to the device (p.r.t. chapter 10)
Relative Pressure Sensors (Types: GMSD...MR. GMSD...BR)
•
For measurements of over- or under pressure:
Connect plastic tube with internal dia of 4 mm to pressure port "B". Port "A" will not be used!
Pressure sensors GMSD 2,5 MR, GMSD 25 MR and GMSD 350 MR allow for measurements of under
pressure up to the entire over pressure measuring range by re-plugging the tube to pressure port "A".
Please note that all values are displayed as positive values. No minus sign will be shown. (Example for
GMSD 25 MR: For tube connection "B" the measuring range covers -19.99 to 25.00 mbar. If you replug
to port "A" under pressure measurements down to -25.00 mbar could be carried out with the display
showing the value 25.00 (no minus sign).
•
For measurements of pressure differences:
Connect both plastic tubes with an internal dia of 4 mm to pressure port "B" and "A"; make sure to apply
higher pressure to port "B".
Absolute pressure sensors: (types: GMSD...BA)
Connect plastic tube with an internal dia of 4 mm to pressure port "A". (Port "B" is not used.)
Stainless steel pressure sensors: (types: GMSD...MRE, GMSD...BRE, GMSD...BAE)
For measurements of over-, under- or absolute pressure screw sensor to G1/4" pressure terminal or plug
plastic tube to a suitable adapter.
7 Error And System Messages
Display
Meaning
What to do?
Low battery power, device will only continue
operation for a short period of time
Replace battery
Battery empty
Replace battery
Mains operation without battery: wrong voltage
Check power supply, replace it when
necessary
No sensor connected
Switch off device and connect sensor
or
Err.9
Connected sensor or device defective
If second sensor available, check if device is
ok. Return defective device/sensor to
manufacturer for repair
Err.9
Measured value far out of allowable range
Check: pressure not within sensor range?
Logger data are read by the interface
When transfer completed the device will
automatically return to normal measuring
display, no remedy necessary
Battery empty
Replace battery
Mains operation without battery: wrong voltage or
polarity
Check power supply, replace it when
necessary
System error
Disconnect battery and power supplies, wait
shortly, then reconnect
No display or
confused
characters,
device does
not react on
keypress
Device defective
Return to manufacturer for repair
Err.4
Value is too low to be displayed, tara is set
Check: display below -2000 (tara?)?
Measured value above allowable range
Check: pressure not within sensor range?
-> measuring value to high
Err.1
Sensor defective
Return to manufacturer for repair
Measured value below allowable range
Check: pressure not within sensor range?
-> measuring value to low
Err.2
Sensor defective
Return to manufacturer for repair
Err.7
System error
Return to manufacturer for repair
