Aztec 600 ISE ammonia and fluoride
Single-stream ion-selective analyzers Appendix B – Troubleshooting
80 OI/AXM630–EN Rev. I
Calibration failure
with slow probe
response
Probe sensing end fouled 1. Check end of probe is clean and clear of any possible fouling
2. Check pump speed and tubing
3. Check for loss of coating on reference element (Ammonia
probes only)
Pump speed too slow Check pump speed
Analyzer and / or pump tubing
obstructed or damaged
Check analyzer and pump tubing for signs of blockage or damage
Ammonia probe reference electrode
coating damaged
Replace glass electrode
Excessive mV Offset
(> ±45 mV)
Incorrect calibration solution(s) Check quality and replace / remake if necessary
Insufficient / incorrect calibration
solution supply
1. Check valve manifold fluid connections
2. Check valve electrical connections
3. Check calibration solution levels and refill if required
4. Check tubing for blockages
5. Check pump speed and pump tubing for wear
Faulty probe Ammonia
&
Fluoride
– Check end of probe is clear of any possible fouling
Fluoride – Replace membrane and recalibrate
Fault Possible Cause Remedy
Table B.1 Faults, Causes and Suggested Remedies (Continued)
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