Teledyne TED 191 User Manual
Page 19
19
TELEDYNE ELECTRONIC TECHNOLOGIES
Analytical Instruments
T
ROUBLESHOOTING
S
YMPTOM
C
URE
/ R
EMARK
The displayed readings
are unstable
1) Remove the sensor tip from the T-adaptor, unscrew the “flow
diverter” and gently swab any excess moisture off the sensor cell
membrane, then flow dry gas over the membrane.
2) Check for a source of RFI emission. Relocate the instrument.
3) Check that the calibration control knob is properly locked in
position.
Instrument reads “00”
1) The sensor is not plugged in.
2) There is bad sensor/cable or cable/monitor connection.
Displayed value drifts
by 2 – 3% over 3 – 4
hours
1) Replace sensor cable.
2) Replace cable.
Alarm continuously
activates when
displayed value is less
than 18%
1) The minimum low alarm threshold is 18%. The Teledyne TED 191
will always alarm under these conditions.