Model DM-100
DM-100 Instruction Manual
Rev. 3.5
Page 23 of 41
5.
Troubleshooting Guide
If the ITM detects any functional errors the ITM will bring the mA output to 0mA and hold it there until the
problem has been resolved. If the unit has a Display, the display will show an error code. Error codes are
displayed as
FLXX
where XX is the actual error code.
The Display Error Codes are:
FL01 Auto Span Fault
FL05 ITM Memory Fault
FL06 Processor Fault
FL07 Clearing Fault
FL08 Stability Fault
FL09 Range Fault
FL10 Sensor Fault
FL11 Zero Fault
FL12 Sensor Fault 2
AutoSpan Fault (FL01)
This fault occurs when a span calibration has not been performed in the last 180 days. Execute a span
calibration to clear this fault.
Transmitter Not Responding (FL05, FL06)
•
Verify condulet has no accumulated water or abnormal corrosion.
•
Verify required DC power is applied to correct terminals. Swap with a known-good ITM to determine
if ITM is faulty.
Clearing Problem (FL07)
•
The sensor must recover to < 10% of range in < 5 min after Span calibration is complete. Verify the
cal gas is being removed at the appropriate time during span calibration.
•
Background gas may be present. Use bottled air (zero air or N
2
) if there is a known continuous
background level.
•
Check validity of span gas using pull tube or other means (check MFG date on cal gas cylinder).
Use proper cal gas regulators and tubing for highly corrosive gases.
•
Check for obstructions affecting cal gas hitting sensor face, including being wet, blocked, or corroded.
H2S sensors assemblies use 100 Series Bottom Housing Assembly with integral filter. Clean or replace
if necessary.
•
Replace the plug-in toxic sensor.
Stability Fault (FL08)
•
Verify the cal gas cylinder is not close to being empty.
•
Check validity of span gas using pull tube or other means, verify MFG date on cal gas cylinder. Use
proper cal gas regulators and tubing for highly corrosive gases.
•
If using Splashguard with Integral Cal Port, must use Calibration Wind Guard or air movement can
compromise span gas delivery
•
Check for obstructions affecting cal gas hitting sensor face, including being wet, blocked, or corroded.
H2S sensors assemblies use 100 Series Bottom Housing Assembly with integral filter. Clean or replace
if necessary.
•
Replace the plug-in toxic sensor.
