Dwyer HM35 - Manual (Page 25)

24
4.4 Mains supply unit connection
The unit can be operated from a regulated
plug-in mains supply unit.
Input 100 - 240 V, 50 - 60 Hz
Output 6 VDC ± 10 %, 1,5 W
5 Maintenance and storage
The HM35 requires no maintenance. It can be cleaned with a damp cloth. Do not use
cleaning agents containing solvents!
See the relevant chapters for battery replacement und re-calibration.
During longer storage, remove the batteries from the instrument.
Do not drop below or exceed the admissible storage temperatures of -20 °C to 60 °C!
6 Warning messages and faults
Code Fault / Display Possible cause Correction
Does not switch on Power supply missing Possibly replace the batteries.
Battery possibly inserted incorrectly.
Possibly plug in power supply
correctly.
Instrument inaccurate • Re-calibration carried out
inaccurately
• Not zeroed
• Natural aging of the pressure
sensor
• Re-calibrate
• Vent and press Zero
• Have it re-calibrated
No change of the measured
value Excess pressure on sensor Send instrument to the manufacturer
for repair.
14
PRESSURE
OUT OF RANGE! Measurement range has been
exceeded by more than 10 %. Set up the permissible measurement
pressure.
13
PRESSURE
OUT OF RANGE! • Excess pressure on sensor
• Electrical fault Send instrument to the manufacturer
for repair.
06
TEMPERATURE
OUT OF RANGE! Pressure sensor exposed to
temperature outside permissible
range (< -5 °C or > 55 °C) Observe permissible operating
temperature and temperature of the
medium.
04
TEMPERATURE
OUT OF RANGE! Used outside permissible
temperature range Observe permissible operating
temperature.
15
REF. VOLTAGE
FAILURE! Internal reference voltage error Send instrument to the manufacturer
for repair.
07
NOT CALIBRATED! Incorrect calibration of the
instrument Send instrument to the manufacturer
for repair.
05 LOW BATTERY! Battery voltage too low Replace batteries
No IR communication • Line-of-sight connection
interrupted
• Separation too large
• PC-configuration
• Re-establish line-of-sight
connection
• Max. distance 50 cm
• Check IR connection