Page 84 - PBL71 OI/AXM630-EN AZTEC 600 SS (WIRO)

Aztec 600 ISE ammonia and fluoride
Single-stream ion-selective analyzers Appendix B – Troubleshooting
Fault
Possible Cause
Remedy
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
& – Check end of probe is clear of any possible fouling Fluoride
Fluoride – Replace membrane and recalibrate
Table B.1 Faults, Causes and Suggested Remedies (Continued)
80 OI/AXM630–EN Rev. J