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Pressure Measurement Amplifier DMV 4000
7. Programme accessibility / barring:
7.1 Keypad lock/unlock
The DMV 4000 allows all accessibility levels to be password protected.
To lock/unlock the keypad, press and hold the keys
and
simultaneously for 2 seconds. With
keypad locked, if the user presses a key, the instrument displays the message „Lock“.
The keypad lock is retained in the event of power failure.
7.2 Output lock/unlock
The analogue and alarm outputs are switched to the OFF status by pressing and holding the keys
and
simultaneously for 2 seconds. With the outputs locked, when displaying the process
variables, the instrument displays the message “block” instead of “Unit”. To unlock the outputs press
the keys simultaneously again.
The output lock is retained in the event of power failure.
8. Commissioning
Listed below is a step-by-step breakdown for start-up and commissioning purposes. In order to
warrant an exact measurement, the connected pressure sensor needs to be calibrated in conjunction
with the DMV 4000. During the calibration procedure, the pressure sensor must be at operating
temperature and not subjected to any pressure influences.
1. Confirm no supply voltage.
2. Connect DMV 4000 according to wiring diagram ( page 4
)
3. Connect supply voltage. After approx. 3 seconds the DMV 4000 is ready for operation.
