Huber HM28, Operating Instructions Manual

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4.3 Mains supply unit connection
The HM28 can be operated from a regulated
plug-in mains supply unit.
Input 230 V, 50 Hz
Output 9 V DC ± 20 %, 100 mA
(7 to 14 V DC)
5 Maintenance
The HM28 requires no maintenance. It can be
cleaned with a damp cloth. Do not use cleaning
agents containing solvents!
See the relevant chapters for battery
changing and recalibration.
7 Accessories
Standard 1 9 V block battery
1 operating instructions
Option Plug-in mains supply unit
230 V, 50Hz
Leather case with carrying strap
Service set
Hand pump with variobellows 5bar
Handpump 35bar
SCS test certificate
Adapter RS232 9M-25F
Adapter NPT1/8"
Communication packet
comprising:
-
RS232-IF cable (9 pole fem.)
- Communication-software for
MS Windows
- Measuring point
administration-software for
MS Windows
6 Warning messages and faults
Fault/indication Possible cause Remedy
ERROR
OUT OF RANGE
CHANGE BATTERY
No change in
measured value
Does not switch on
Instrument
inaccurate
10% overshoot or undershoot
of measuring range
Battery voltage too low
Excess pressure applied to
pressure sensor
No power supply
Inaccurate recalibration
Not zeroed
Natural aging of the pressure
sensor
Set permissible measuring
pressure
Fit new battery
Dispatch instrument for repair
Fit new battery as required
Battery possibly not correctly installed
Plug mains supply unit in correctly
Repeat recalibration
Vent and actuate zero
Carry out recalibration