Cameron BARTON 289A - Indicator Calibration

17
Table 3-1. Troubleshooting
Problem Possible Source Probable Cause Corrective Action
Low or no
Indication
Primary element
or DPU (refer to
DPU Manual)
Orice installed backwards
or oversized
Replace orice.
Flow blocked upstream
from run
Clean out run or open
valve.
Loss of liquid in reference
leg (liquid level)
Rell reference leg.
Density changes in process
media or reference leg
Rell reference leg with
same density liquid as
process media.
Primary element
to DPU piping
(refer to DPU
Manual)
Pressure tap holes plugged
and/or piping plugged
Clean out piping.
Bypass valve open or
leaking
Close bypass valve(s)
and/or repair leaks.
Liquids or gases trapped in
piping
Vent piping.
Block or shutoff valves
closed
Open block or
shutoff valves.
Piping leaks on HP side Repair leaks.
Low or no
Indication
(cont'd)
Bellows unit (refer
to DPU Manual)
Housing lled with solids
restricting bellows movement
Clean out housing.
Gas (liquid service) or liquid
(gas service) trapped in
housing
Vent housing.
HP housng gasket leak Replace gasket.
DPU tampered with Return BUA for repair.
Indicator,
alarm switch
mechanism
Loose linkage or movement Tighten or replace.
Out of calibration Calibrate.
Pointer loose Tighten pointer.
Dirty or corroded mechanism Clean or replace.
Wiring interfering with move-
ment
Re-route wiring.
Dirty mechanism Clean mechanism.
High
indication
Primary source Orice partially restricted or
too small
Clean out or replace.
Primary element
to DPU piping
Piping leaks on LP side Repair leaks.
Bellows unit
(Refer to DPU
Manual)
Gas (liquid service) or liquid
(gas service) trapped in
housing
Vent housing.
LP housing gasket leak Replace gasket.
Range Spring broken or
DPU tampered with
Return BUA for repair.