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| Calibration Fail (CF) |
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Faulty Solenoid Valve |
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Run Solenoid Check cycle in Diagnostics – check status and connections of solenoid valve. |
| Calibration Fail (CF) |
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Empty or Contaminated Standards Solutions Container |
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Check to make sure CAL standard bottle is full, check CAL tubing to make sure it is not pinched. Replace CAL standard with fresh solution and try again. |
| Calibration Fail (CF) |
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Strength is too low. |
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Replace reagent solution. Re-gel/replace hydrazine sensor. |
| Calibration Fail (CF) |
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Strength is too high. |
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New sensor – needs to rinse down. Let sensor run on sample for 5 hours – repeat calibration. |
| Calibration Fail (CF) |
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Strength is close to zero. |
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Replace reagent solution. Re-gel/replace hydrazine sensor. |
| Readings are not accurate – too low. |
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Old/bad reagent. Poor sensor performance. Bad calibration. |
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Replace reagent solution. Re-gel/replace hydrazine sensor. Check CAL log and run another CAL if last result is not good. |
| Readings are not accurate – too high. |
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Poor sensor performance. Bad calibration. Hydrazine leak in sample system. |
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Let sensor run on sample water for 1-2 hours; then run another CAL. Re-gel/replace hydrazine sensor. Check CAL log and run another CAL if results are not good. Bench test sample water. |
| Current outputs (4-20mA) not functioning correctly. |
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Disconnected wiring at transmitter or along wire path. DCS/recording system not set up properly. Bad CPU board. |
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Check outpuTt set-up to make sure values are entered properly. Run Diagnostics – O/PmA check and check output coming directly from transmitter. Replace CPU board if output is not correct. |
| Alarms not functioning correctly. |
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Disconnected wiring at transmitter or along wire path. DCS/recording system not set up properly. Bad DIO board. |
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Check alarm set-upT to make sure values are entered properly. Run Diagnostics – Relay Check cycle and check alarm output directly from transmitter. Replace DIO board if output is not correct. |
| Display read “HOT” |
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Sample temperature over specified range (>131F). Faulty thermistor. |
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Check sample temperature. Replace sensor. |
| Display read “TEMP” |
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No thermistor response. |
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Replace sensor. Check thermistor connection at transmitter and sensor |
| Display read “OVR” |
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Signal from sensorT too high – sample concentration over maximum range (>1ppm) |
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Check sample concentration. Check sensor connections. |
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