TESTO 312-4, Instruction Manual

Page: 34 / 38

8 Tips and assistance
34
8 Tips and assistance
8.1. Questions and answers
Question Possible causes/solution
Instrument switches
off after printing. Battery voltage too low.
> Replace
battery.
Display cannot be
zeroed. There is a differential pressure outside of
the range permissible for zeroing.
> Reduce the differential pressure to a
permissible value.
Saved settings and
measurement
values are no longer
present in the
instrument. A factory reset was performed or the
instrument was de-energized for a long
period.
> No remedy possible! Regularly save
the readings (PC software, printout).
8.2. Accessories and spare parts
Description Article no.
testo 316-1 gas leak detector 0632 0316
Differential pressure probe, 100 Pa 0638 1347
Differential pressure probe, 10 hPa 0638 1447
Differential pressure probe, 100 hPa 0638 1547
Differential pressure probe, 1000 hPa 0638 1647
Differential pressure probe, 2000 hPa 0638 1747
Absolute pressure probe, 2000 hPa 0638 1847
Relative pressure probe, 10 bar 0638 1741
Relative pressure probe, 30 bar 0638 1841
Relative pressure probe, 40 bar 0638 1941
Relative pressure probe, 100 bar 0638 2041
Relative pressure probe, 400 bar 0638 2141
Pipe wrap probe TC type K 0600 4593
Immersion/penetration probe type K 0604 0493
Temperature/air probe NTC 0610 9714