Troubleshooting - testo 400 Bedienungsanleitung

Problem
No CO 2 display in
instrument
Incorrect CO 2 display
CO 2 display is slow
testo AG
Postfach 11 40, 79849 Lenzkirch
Testo-Straße 1, 79853 Lenzkirch
Telefon: (07653) 681-0
Fax: (07653) 681-100
E-Mail: info@testo.de
Internet: http://www.testo.com
Possible cause
- Probe not connected
- Probe not in
socket 1 (testo 454)
- Cable/plug defect
- battery empty
- Probe not recognised
- Probe defect (does not
flash)
- Probe calibration is
incorrect
- Faulty calibration
Diffusion mode:
slow gas exchange
Background
high power
consumption of the
probe
EEPROM could be
defect
Old software
version
Impact, age
Impact, age
Waiting times during
calibration are too
short
Pump movement
may have been too
quick
Pipes/connections
in gas path leak or
are clogged
Absorption filter is
worn
Filter in probe is
clogged
0973.0411/06.97/T/wh/12.07.2004
4
CO P
2

Troubleshooting

Remedy
Connect
Use socket 1
Repair
Recharge battery
Repair
Update software
Service
Calibrate
Wait longer
Check
Replace
Replace
Service
ROBE