Detcon IR-700 - Manual (Page 36)

Model IR-700
IR-700 Instruction Manual Rev. 3.1 Page 32 of 40
 If using Splashguard with Integral Cal Port, must use Calibration Wind Guard or air movement can
compromise span gas delivery.
 Verify correct Gas Type and Gas Factor is entered.
 Check validity of span gas and flow rate (check MFG date on cal cylinder).
 Check for obstructions through stainless steel sinter element (including being wet).
 Replace the plug-in IR sensor, and/or bottom housing.
Clearing Fault
Probable Causes: Failed Sensor, Cal Gas not removed at appropriate time, problems with cal gas and delivery,
or Background combustible gases preventing clearing
 Perform AutoSpan following the instructions explicitly.
 Remove calibration adapter and gas connections.
 Confirm no combustible gasses in background.
 Check validity of span gas and flow rate (check MFG date on cal cylinder).
 Check for obstructions through stainless steel sinter element (including being wet).
 Replace the plug-in IR sensor, and/or bottom housing.
Poor Calibration Repeatability
Probable Causes: Failed Sensor, use of wrong Cal Gas, problems w/ cal gas and delivery, Sensor Corrosion
 Check for adequate Sensor Life.
 Increase calibration frequency to quarterly.
 Verify correct Gas Type and Gas Factor is entered.
 Check validity of span gas and flow rate (check MFG date on cal cylinder).
 Check for obstructions through stainless steel sinter element (including being wet).
 Replace the plug-in IR sensor, and/or bottom housing.
Unstable Output/ Sudden spiking
Possible Causes: Unstable power supply, inadequate grounding, or inadequate RFI protection
 Verify Power source is stable.
 Verify field wiring is properly shielded and grounded.
 Contact Detcon to optimize shielding and grounding.
 Add Detcon’s RFI Protection Circuit accessory.
Nuisance Alarms
 Check condulet for accumulated water and abnormal corrosion on terminal blocks.
 If nuisance alarms are happening at night, suspect condensation in condulet.
 Add or replace Detcon’s Condensation Prevention Packet P/N 960-202200-000.
 Investigate presence of other combustible hydrocarbon gases that may be causing sensor response.
Processor and/or Memory Faults
 Recycle power in attempt to clear problem
 Restore Factory Defaults – This will clear the processor’s memory and may correct problem.
 Remember to re-enter all customer settings for cal gas level, set gain, Serial ID after Restore Factory
Defaults.
 If problem persists, replace the Intelligent Transmitter Module.
Unreadable Display