Model FP-700
FP-700 Instruction Manual Rev. 5.1 Page 36 of 46
• Check validity of span gas and flow rate (check MFG date on cal cylinder).
• If using Splashguard with Integral Cal Port, must use Calibration Wind Guard or air movement can
compromise span gas delivery.
• Make sure correct Cal Factor is set
• Check for obstructions through stainless steel sinter element (including being wet).
• Replace the plug-in sensor.
Clearing Fault
Probable Causes: Failed Sensor, Cal Gas not removed at appropriate time, problems w/ cal gas and delivery, or
Background combustible gases preventing clearing.
• Confirm that no combustible gasses are present in background.
• Check Bridge Voltage (should be 2.7 +/- 0.2VDC).
• Check validity of span gas and flow rate (check MFG date on cal cylinder).
• Make sure correct Cal Factor and Gas Factor is set
• Check for obstructions through stainless steel sinter element (including being wet).
• Replace the plug-in sensor.
Poor Calibration Repeatability
Probable Causes: Failed Sensor, use of wrong Cal Gas, problems w/ cal gas and delivery, or Poison or Inhibitor
Gases.
• Check for adequate Sensor Life.
• Check Bridge Voltage (should be 2.7 +/- 0.2VDC).
• 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).
• Evaluate area for presence of poisoning or inhibiting gases as listed in Section 2.3.
• Increase calibration frequency.
• Note the sensor’s serial # and report repetitive problems to Detcon’s Repair Department.
• Replace plug-in sensor.
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.
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 the presence of any other combustible 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 range and cal gas level after Restore Factory Defaults.
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