Instruction Manual
IB-106-340C Rev. 4.1
July 2004
8-4 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management
Hazardous Area Oxymitter 4000
Table 8-1. Diagnostic/Unit Alarm Fault Definitions – Membrane Keypad Only
LED Flashes Status 4-20 mA Line Fault
Self-
Clearing
HEATER T/C 1 OPEN Dependent on position 3 of SW2* 1 NO
2 SHORTED Dependent on position 3 of SW2* 2 NO
3 REVERSED Dependent on position 3 of SW2* 3 NO
4 A/D COMM ERROR Dependent on position 3 of SW2* 4 NO
HEATER 1 OPEN Dependent on position 3 of SW2* 5 NO
2 HIGH HIGH TEMP Dependent on position 3 of SW2* 6 NO
3 HIGH CASE TEMP Dependent on position 3 of SW2* 7 YES
4 LOW TEMP Depende nt on position 3 of SW2* 8 YES
5 HIGH TEMP Dependent on position 3 of SW2* 9 YES
O2 CELL 1 HIGH mV Dependent on position 3 of SW2* 10 YES
3 BAD Track O211 YES
4 EEPROM CORRUPT Dependent on position 3 of SW2* 12 NO
CALIBRATION 1 INVALID SLOPE Track O213 YES
2 INVALID CONSTANT Track O214 YES
3 LAST CALIBRATION
FAILED
Track O215 YES
** CALIBRATION
RECOMMENDED
Track O2YES
* Critical alarm conditions will render the O2 measurement as unusab le, and any of these events will cause the
4-20 mA signal to go to a user-selectable lim it of 3.5 mA or 21.6 mA (position 3 of SW2). Factory default value
is 3.5 mA. Alarms which are not “self-clearing” will require recycling of power to the electronics.
** The CALIBRATION RECOMMENDED alarm flashes the Calibration Recomm ended alarm LED on the opera-
tor’s keypad.
Table 8-2. Diagnostic/Unit Alarm Fault Definitions – LOI
Message Status
Fault
Number
Self-
Clearing
O2 T/C OPEN HEATER T/C O PEN 1 NO
O2 T/C SHORTED HEATER T/C SHORTED 2 NO
O2 T/C REVERSED HEATER T /C POLARITY REVERSED 3 NO
ADC ERROR A/D COMM ERROR 4 NO
O2 HEATER OPEN O2 HEATER OPEN 5 NO
VERY HI O2 TEMP VERY HIGH PROCESS TEMPERATURE 6 NO
BOARD TEMP HI ELECTRONICS OVERHEATED 7 YES
O2 TEMP LOW LOW PROCESS TEMPERATURE 8 YES
O2 TEMP HI HIGH PROCESS TEMPERATURE 9 YES
O2 CELL OPEN O2 CELL OPEN 10 YES
O2 CELL BAD O2 CELL FAILED 11, 13, 14 YES
EEPROM CORRUPT EEPROM FAILED 12 NO
CALIB FAILED LAST CALIBRAT ION FAILED 15 YES
LINE FREQ ERROR INCORRECT INPUT LINE FREQUENCY
DETECTED ON POWER UP
NO