27
5
Maintenance
5.1.8.1 Offset Calibration perform to 21 % O
2
Before offset calibration, check whether R
ki
O
2
value is equivalent to 15
(see menu 211 and
213 in chapter
5.1.3 Reading the Measured Values
).
Otherwise, proceed as described in chapter
5.1.6 Response of the Internal Resistance Reg-
Fig. 5-1 R
ki
Display
Also check the probe voltage U-O
2
. It must be in the range of +10 ... -20 mV.
To perform an offset calibration, the probe must be located in the ambient air and should run
for at least 30 minutes in a fault-free measuring mode.
No access level is required!
NOTICE
When using a LS2-HT (type 656R2015), the offset calibration can also be performed in an in-
stalled state whilst combustion is running. For this purpose, air (dry and oil-free air, instrument
air or ambient air) must be fed at connection with a volume of 40 ... 60 l/h for the duration of
the calibration.
Activate
MAINTENANCE
MODE!
select the probe for Calibration in the main
menu
.
Select
for the offset calibration.
Summary of Contents for KS1D
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