Type 2500
23
Figure
15. Direct-Acting Left-Hand-Mounted Type 2503 Controller
BD4466–A
CD2114–E
A1890–1/IL
al tolerances, etc.), use only replacement parts
manufactured or furnished by Fisher Controls.
WARNING
When replacing the sensor assembly,
the displacer may retain process fluid or
pressure. Personal injury or property
damage may occur due to sudden re-
lease of the pressure. Contact with haz-
ardous fluid, fire, or explosion can be
caused by puncturing, heating, or re-
pairing a displacer that is retaining pro-
cess pressure or fluid. This danger may
not be readily apparent when disassem-
bling the sensor assembly or removing
the displacer. Before disassembling the
sensor or removing the displacer, ob-
serve the more specific warning pro-
vided in the sensor instruction manual.
Troubleshooting
When troubleshooting, open loop conditions must exist
unless otherwise stated. When monitoring the process
variable, use the most accurate level indicating device
available. The output signal measuring device should
have corresponding accuracy.
Table 6 lists some common operating faults, their
probable causes, and corrective action.
Removing Controller/Transmitter from
Sensor
WARNING
To avoid injury in the following steps,
turn off the supply pressure and careful-
ly release any pressure trapped in the
controller/transmitter before breaking
any pressure connection. Provide a by-
pass for the control device if continuous
operation is required during mainte-
nance.
1. Disconnect the supply and output pressure tubing
from the controller or transmitter. For a controller/
transmitter with an indicator, remove the pointer as-
sembly by referring to the section entitled Replacing
the Bourdon Tube.
To Next Page
Loading...
Need help?
General
