SOR 534CR Pressure Transmitter - Manual (Page 2)

2/8 Form 903 (03.13) ©SOR Inc.
Calibration
Wiring 534CR - TN
Three 18” flying leads are provided for connection to a terminal strip within a cabinet or a
splice within an outlet box:
Red (+)
Black (–)
Case
ground (bare wire) should be connected to earth ground.
Formula for determining
maximum loop resistance:
Loop Voltage: 10 to 30 VDC; Output: 4 to 20 mA
}
R
L
(Max) =
V
Supply
- 10V
Two calibration screws (zero and span) are located underneath the adjustment cover. (See
) Loosen the cover screws slightly (do not remove) and rotate the cover to reveal the
adjustment screws.
Numbers on the enclosure identify the adjustment screws: 1, 2 and 3.
Adjustment #1: Zero
Adjustment #2: Span
Adjustment #3: Not used
Unless specified otherwise, the transmitter is factory calibrated to 4 mA @ 0 psi and 20 mA
at the upper limit of the adjustable range specified on the nameplate.
Units in Hazardous Locations— Prior to removal from service, make sure the
work area is declassifi ed. Failure to do so could result in severe personal
injury or substantial property damage.
process piping system: one wrench to hold the hex flats of the pressure connection, the
other to tighten the process fitting. Electrical connection may be rigid or flexible conduit
Making the Electrical Connection First
The electrical connection may be installed on an adequately supported rigid conduit
system. Use suitable locknuts (not provided) when mounting the instrument to an
unthreaded (knockout) hole. Process connection pipe or tubing may be rigid or flexible.
Securely connect the conduit pipe or fitting by holding the hex on the electrical connection
while tightening.