GF Signet 4632 Chlorine Dioxide Analyzer System - Manual (Page 40)

40 463X Chlorine System Manual
Several factors can cause irregular or incorrect readings. The ¿ rst thing to check is to verify that the transmitter and
sensors have been installed correctly. The list below outlines possible causes and remedies.
Problem Possible Cause Remedies
Transmitter does not turn on.
Incorrect wiring.
No or low voltage supplied to transmitter.
Blown fuse.
Bad wire connections or splices.
Check wiring, power supply and wiring
connections.
Display screen is too dark or too dim.
Contrast set incorrectly or ambient temperature
is too high.
Adjust contrast in Options Menu.
LCD backlight, relays and sensors do not
work.
No power supplied to terminals 1 and 2.
Transmitter requires power to terminals
1, 2, 3 and 4.
Incorrect temperature reading.
Faulty chlorine sensor.
Bad sensor connection.
Check connections or replace sensor.
Display or Current output is erratic.
Electrical noise interfering with the
measurement.
Sensor malfunction.
Ensure system is properly grounded.
See Sensor Troubleshooting.
Output is not zero when electrode is
placed in non-chlorinated water.
Electrode not properly conditioned.
Noise interfering with the measurement.
Calibration incorrect.
Condition new sensor for 4 hours. Cap
replacement or electrolyte re¿ ll: 2 hours.
Properly ground system.
Replace sensor.
4 to 20 mA output is incorrect.
4 to 20 mA is not scaled same as Loop device.
Loop device is not scaled same as sensor.
Re-span loop device to match sensor.
Chlorine Sensor Troubleshooting (see 2630 sensor manual)
Incorrect readings
Sensor conditioning time too short. Run for 4 hours before calibrating.
Membrane cap damaged or contaminated. Clean or replace cap.
Interference from water contaminants. See Speci¿ cations data.
Low À ow rate. Check À ow.
Air bubbles on membrane.
Install À ow cell vertically with upwards
À ow.
pH outside working range
(See Speci¿ cations data).
Check pH.
Low or no electrolyte in sensor. Fill sensor with electrolyte.
Membrane cap loose. Inspect/tighten (do not use tools).
Only combined chlorine present when
measuring free chlorine.
Validate with DPD test.
Sensor not making good contact with
electronics.
Inspect and reconnect.
Defective sensor. Replace.
No pH compensation being used.
Manually enter pH value in Options or
calibrate pH sensor.
Cl sensor not calibrated. Calibrate Cl sensor.
Troubleshooting - 8630 Chlorine Transmitter
Appendix