Instruction Manual
Appendix B Rev. 2.2
January 1997
B-6 Appendices Rosemount Analytical Inc. A Division of Emerson Process Management
World Class 3000
HEATEROVERHEATS.
NOTE: ON INITIAL STARTUPTHE
TEMPERATUREOF THE PROBE MAY
OVERHEATTO A NOMINAL TEMP OF
800°C.
CHECK IF THE YELLOW WIRE IS CONNECTED
TO POSITIVE AND THE RED TO NEGATIVE
ON BOTH “FROM ELECTRONICS”AND “FROM
PROBE”TERMINAL BLOCKS. (MODELS 218
AND 225 ONLY)
SET METER* ON 250 VACSCALE.
CHECK “FROM ELECTRONIC”, ANALOG
HEATERTERMINALS IF THERE IS A
PULSATINGNOMINAL 115 VAC.
CHECK “FROM PROBE”, TERMINALS AT
PROBE HEATERIF THERE IS A PULSATING
NOMINAL 44 VOLTS.
CHECK PROBE ELECTRONICS SETPOINT
HAS BEEN CHANGED ACCORDING TO
APPLICABLE ELECTRONICS PACKAGEIB.
SET METER* ON 50 VACSCALE.
CHECK IF PROBE HEATERVOLTAGE
SELECTION JUMPER JM7 INSTALLED
(REMOVE JM8).
CONNECT THE WIRING
ACCORDING TO THE
DECALS ON THE TERMINAL
COVERS.
IF THE VOLTAGEIS
CONSTANTLYON, THEN
THE TRIAC IN THE PROBE
ELECTRONICS IS SHORTED.
IF THE VOLTAGEIS
CONSTANTLYON, THEN
THE TRIAC MODULE IN
THE HPS IS SHORTED.
NO
NO
NO
YES
YES
YES
SYMPTOM
*SIMPSON MODEL 260 OR EQUIVALENTMULTIMETER. 35730003
Figure B-5. HPS Troubleshooting Flowchart, #2