Evaluation Unit AVL 4000
4-58 Service Manual
Field 8 Pneumatic components no /yes
LF Low flow 0 1
ZF Zero failure 0 1
LKF Leak failure 0 1
SF1 Pneumatic failure
Message 80 error in pneumatic components module
40 error in measuring instrument unit
20 low flow in pneumatic components module
10 communication error
SF6 Irrelevant
Z/L Displays whether zero (= zero calibration) or leak test is in progress
(0 = no, 1 = yes)
Field 9 Display field for gain factors
Setpoint values
SE 128
FE 128
OE 0 (or NO sensor temperature)
SZ 128
O2 239
PEF 490…540
The factors fluctuate violently when the tester is switched on, but should settle down to
the following values once the measuring instrument unit has stabilised (approx. 15min):
SE, FE, SZ 128 ± 10
OE 0
O2 239 ± 10
PEF must be stable and lie in the range specified above
If the values continue to fluctuate (15 min after switching on), there must be a failure in
the measuring instrument unit replace the measuring instrument unit (see section. 4.3
Dismantling the 4-/5-Gas Measuring Instrument Unit).
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