Pressure Connection To The Sensors; Accuracy Check / Adjustment Service; Replacing Batteries - GREISINGER GMH 5130 Betriebsanleitung

H82.0.01.6C-03

10 Pressure Connection to the Sensors

The device is designed to be connected to the sensors of the GMSD/GMXD...-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 ... 1000 bar absolute pressure can be connected to the device.
Relative pressure sensors (types: GMSD ... MR - K51, GMSD ... BR - K51)
For measurements of over- or under pressure:
Pressure sensors GMSD 2,5 MR - K51, GMSD 25 MR - K51 and GMSD 350 MR - K51 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 - K51: 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 diameter of 4 mm to pressure port "B" and "A"; make sure to
apply higher pressure to port "B".
Absolute pressure sensors (types: GMSD ... BA - K51)
Connect plastic tube with an inner diameter of 4 mm to pressure port "A". (Port "B" is not used.)
Stainless steel sensors (types: MSD ... MRE, MSD ... BRE, MSD ... BAE)
For measurements of over-, under- or absolute pressure screw sensor to G1/2" pressure terminal or plug
plastic tube to a suitable adapter. Connection to instrument: Use cable MSD-K51.

11 Accuracy Check / Adjustment Service

You can send the device to the manufacturer for adjustment and inspection.
Calibration certificate - DKD certificate - official certifications:
If the measuring instrument is supposed to receive a calibration certificate, it has to be sent to the
manufacturer (declare test points).
If the device is certificated together with a suitable sensor very high overall accuracies are possible.
Basic settings can only be checked and – if necessary – corrected by the manufacturer.
A calibration protocol is enclosed to the device ex works. This documents the precision reached by the
production process.

12 Replacing Batteries

Before changing batteries, please read the following instruction and follow it step by step.
Not following the instruction may cause harm to the instrument or the
protection against ingress of water and dust may be lost!
Avoid unnecessary opening of the instrument!
1. Open the 3 Phillips screws at the backside of the instrument.
2. Lay down the still closed instrument, so that the display side
points upwards.
The lower half of the housing incl. the electronics should be kept
lying down during battery change.
This avoids loss of the sealing rings of the screw holes..
3. Lift upper half of housing. Keep an eye on the six function keys,
to be sure not to damage them.
4. Change carefully the two batteries (Type: AAA).
5. Check: Are the 3 sealing rings placed in the housing?
Is the circumference seal of the upper half sound and clean?
6. Close the housing, taking care that it is positioned correctly,
otherwise the sealing may be damaged. Afterwards press the two
halves together, lay the instrument with display pointing
downwards and screw it together again
Take care to screw only until you feel increasing resistance,
higher screwing force does not result in higher water
protection!
Operating Manual GMH 5130
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do not
touch
circuit
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