396P + 396PVP Sensors Instruction Manual | Section 6: Diagnostics & Troubleshooting |
LIQ_MAN_396P_396PVP | August 2013 |
|
|
Section 6: Diagnostics and Troubleshooting
6.154e/56/1056/1057/1066/3081/4081/5081/XMT Diagnostics and Troubleshooting
Many Rosemount Analytical Instruments and Transmitters automatically search for fault condi- tions that would cause an error in the measured pH value. Refer to the applicable Instruction Manual for a complete description of the analyzer’s fault conditions.
Table
TABLE 6-1. Troubleshooting with Advanced Diagnostics
DIAGNOSTIC MESSAGE | DESCRIPTION OF PROBLEM | REMEDY |
|
|
|
“Calibration Warning” | 1. Aged glass. | 1. Perform buffer calibration. |
CALIbrAtE | 2. Sensor not immersed. | 2. Be sure electrode measuring tip |
|
| is in process. |
|
|
|
“Cracked glass failure” | Broken or cracked glass. | Replace sensor. |
6LASS fAIL |
|
|
|
|
|
“High reference impede” | 1. Liquid junction coated. | 1. Clean sensor; replace if necessary. |
rEF fAIL or rEF WjArn | 2. Reference Cell gel depleted. | 2. Replace sensor. |
| 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. |
6LaSS WjArn | 2. Sensor not immersed. | 2. Be sure electrode measuring tip |
| ||
|
| is inprocess. |
|
|
|
“Reference offset err” | Reference electrode poisoned. | Replace sensor. |
(offline only) |
|
|
Std Err |
|
|
|
|
|
“Ref voltage high” | 1. Reference shorted or sensor miswired. | Check wiring and installation. |
“Ref voltage low” | 2. Sensor not immersed | Replace sensor if necessary. |
“Sensor line open” | 1. Open wire between sensor and analyzer. | 1. Check sensor wiring. |
LInE FAIL | 2. Interconnecting cable greater than | 2. Relocate analyzer. |
| 1000 ft. |
|
|
|
|
“Sensor miswired” | 1. Open wire between sensor and analyzer. | 1. Check wiring. |
| 2. Bad preamplifier. | 2. Replace preamplifier. (Code 02 only) |
|
|
|
“Temp error high” | 1. Open or shorted RTD. | 1. Replace sensor. |
“Temp error low” | 2. Temperature out of range. | 2. Check process temperature. |
tEMP HI |
|
|
tEMP LO |
|
|
|
|
|
Diagnostics and Troubleshooting | 41 |
