MODEL 396R pH/ORP | SECTION 7.0 |
| DIAGNOSTICS AND TROUBLESHOOTING |
SECTION 7.0
DIAGNOSTICS AND TROUBLESHOOTING
7.1DIAGNOSTICS AND TROUBLESHOOTING WITH MODEL 54/81/3081 pH/ORP. The Model 54 and 54e Analyzers and Models 81 and 3081 pH Transmitters automatically search for fault conditions that would cause an error in the measured pH value, as does the Model 1054A/B pH/ORP Analyzer to a lesser degree. Refer to the respective manual for a complete description of the analyzer’s fault conditions.
Table
TABLE 7-1 Troubleshooting with Diagnostics
DIAGNOSTIC MESSAGE |
|
|
|
|
54 and 54e |
|
|
|
|
81/3081 | DESCRIPTION OF PROBLEM | REMEDY | ||
|
|
|
| |
“Calibration Warning” | 1. Aged glass. | 1. | Perform buffer calibration. | |
| 2. | Sensor not immersed. | 2. | Be sure electrode measuring tip is in |
DBMJcsBtF |
|
|
| process. |
“Cracked glass failure” | Broken or cracked glass. | Replace Sensor. | ||
7MBTT!GBJM |
|
|
|
|
“High reference imped” | 1. | Liquid junction coated. | 1. | Clean sensor; replace if necessary. |
| 2. | Reference Cell gel depleted. | 2. | Replace sensor. |
sFG!GBJM or sFG!WBso | 3. | Sensor not immersed. | 3. | Be sure electrode measuring tip is in |
|
|
|
| process. |
“Input voltage high” | pH input shorted or sensor. | Check wiring. Replace sensor if | ||
“Input voltage low” | miswired. | necessary. | ||
|
|
|
|
|
“Old glass warning” | 1. | Glass electrode worn out. | 1. | Replace sensor. |
7MbTT!WBso | 2. | Sensor not immersed. | 2. | Be sure electrode measuring tip is in |
|
|
| process. | |
|
|
|
| |
“Reference offset err” | Reference electrode poisoned. | Replace sensor. | ||
(offline only) |
|
|
|
|
Tte!Fss |
|
|
|
|
“Ref voltage high” | 1. | Reference shorted or sensor | Check wiring. Replace sensor if | |
“Ref voltage low” |
| miswired. | necessary. | |
| 2. | Sensor not immersed. |
|
|
“Sensor line open” | 1. | Open wire between sensor and analyzer. | 1. | Check sensor wiring. |
| 2. | Interconnecting cable greater than | 2. | Relocate analyzer. |
MJoF!GBJM |
| 1000 ft. |
|
|
|
|
|
|
|
“Sensor miswired” | 1. | Open wire between sensor and analyzer. | 1. | Check wiring. |
| 2. | Bad preamplifier. | 2. | Replace preamplifier. |
|
|
|
| |
“Temp error high” | 1. | Open or shorted RTD. | 1. Replace sensor. | |
“Temp error low” | 2. Temperature out of range. | 2. Check process temperature. | ||
tFMQ!IJ |
|
|
|
|
tFMQ!MP |
|
|
|
|
36