CODEL Energy Tech 401 Installation, Operation And Maintenance Manual page 121

4.4 Modulation
frequency out
range
4.5. Set Cal out of
range
Issue: A Revision: 1 Date: 24/07/19
Chopper motor speed Adjust
out of range motor speed
of
Monitor
waveform across
10 &11 in power
supply
oscilloscope
Calibrated with Calibrate
incorrect target value or correct
under fluctuating gas value
level
Poor alignment / Proceed
window contamination / low detector level
path obscuration
Tx gas cell drive failure Proceed
low detector level
D2 detector/circuit Check D2 signal
failure level
Monitor D2 signal
from Rx
Transmitter gas cell Replace Tx gas
failure cell
Receiver gas cell failure Replace Rx gas
cell
Ref: 100606
Section 6
Maintenance
chopper Mod. Frequency in
range
Unable to adjust
ref. 30 – 45Hz –
waveform OK
<30 or >45Hz –
using
waveform
incorrect
with Cal factor in range
target
Cal factor out of
range
as for Cal factor in range
Cal factor out of
range
as for Cal factor in range
Cal factor out of
range
OK
Not OK
OK
Not OK
Cal factor in range
Cal factor out of
range
Cal factor in range
Cal factor out of
range
No further action
Proceed to next test
Contact your CODEL supplier
Contact your CODEL supplier
No further action
Proceed to next possible
cause
No further action
Proceed to next possible
cause
No further action
Proceed to next possible
cause
Proceed to next possible
cause
Proceed to next test
Contact your CODEL supplier
Contact your CODEL supplier
No further action
Proceed to next possible
cause
No further action
Contact your CODEL supplier
Page: 121