Teledyne 700 IR Series Instruction Manual page 44

700 IR Series
INFRARED GAS DETECTOR FOR COMBUSTIBLE AND CO
GASES
USER MANUAL
Stability Fault
Probable Causes: Failed Sensor, empty or close to empty Cal Gas Cylinder or problems with cal
gas and delivery.
• Perform AutoSpan following the instructions explicitly
• Check that cal gas value matches the AutoSpan level
• 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 Teledyne Oldham Simtronics to optimize shielding and grounding
• Add Teledyne Oldham Simtronics's RFI Protection Circuit accessory
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NP700IRIMEN
Revision E.0