28
5 Maintenance
• Once triggered the offset calibration proceeds automatically.
• After a successful calibration, the O
2
value is 21 Vol.% O
2
.
• Deactivate MAINTENANCE mode, see chapter 5.1.5 Activate/deactivate Maintenance
Mode.
Using the keys and ENTER triggers
the offset calibration
Confirm the setting with ENTER within
10 s, otherwise the value is rejected.
The U-O
2
value stabilises to values between
+10...-20mV.
The R
ki
internal probe resistance value is
15 .
Display of whether the internal probe
resistance regulation is active!
P
h
Display of the current heating capacity
R
ki
S Display of the setpoint value for the
control of the internal resistance.