Section 7: Diagnostics And Troubleshooting; Diagnostics And Troubleshooting - Emerson Rosemount Analytical 396P Instruction Manual

396P + 396PVP Sensors Instruction Manual
LIQ_MAN_396P_396PVP
Section 6: Diagnostics and Troubleshooting
6.1 54e/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 7-1, below, lists some of the diagnostic messages that indicate a possible sensor problem.
A more complete description of the problem and a suggested remedy corresponding to each
message is also listed.
TABLE 6-1. Troubleshooting with Advanced Diagnostics
DIAGNOSTIC MESSAGE
"Calibration Warning"
CALIbrAtE
"Cracked glass failure"
6LASS fAIL
"High reference impede"
rEF fAIL or rEF WjArn
"Input voltage high"
"Input voltage low"
"Old glass warning"
6LaSS WjArn
"Reference offset err"
(offline only)
Std Err
"Ref voltage high"
"Ref voltage low"
"Sensor line open"
LInE FAIL
"Sensor miswired"
"Temp error high"
"Temp error low"
tEMP HI
tEMP LO
Diagnostics and Troubleshooting
DESCRIPTION OF PROBLEM
1. Aged glass.
2. Sensor not immersed.
Broken or cracked glass.
1. Liquid junction coated.
2. Reference Cell gel depleted.
3. Sensor not immersed.
pH input shorted or sensor
miswired.
1. Glass electrode worn out.
2. Sensor not immersed.
Reference electrode poisoned.
1. Reference shorted or sensor miswired.
2. Sensor not immersed
1. Open wire between sensor and analyzer.
2. Interconnecting cable greater than
1000 ft.
1. Open wire between sensor and analyzer.
2. Bad preamplifier.
1. Open or shorted RTD.
2. Temperature out of range.
Get other manuals https://www.bkmanuals.com
Section 6: Diagnostics & Troubleshooting
REMEDY
1. Perform buffer calibration.
2. Be sure electrode measuring tip
is in process.
Replace sensor.
1. Clean sensor; replace if necessary.
2. Replace sensor.
3. Be sure electrode measuring tip
is in process.
Check wiring. Replace sensor if
necessary.
1. Replace sensor.
2. Be sure electrode measuring tip
is inprocess.
Replace sensor.
Check wiring and installation.
Replace sensor if necessary.
1. Check sensor wiring.
2. Relocate analyzer.
1. Check wiring.
2. Replace preamplifier. (Code 02 only)
1. Replace sensor.
2. Check process temperature.
August 2013
41