SOR 534HS Two-Wire Pressure Transmitters - Manual (Page 2)

2/12 Form 953 (03.13) ©SOR Inc.
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: Not used
Adjustment #3: Span
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.
Calibration Procedure
The zero and span calibration procedure should be performed under ambient process
temperature conditions.
Calibration
Unit in Hazardous Locations – Prior to removal from service, make sure
that the work area is declassifi ed. Failure to do so could result in severe
personal injury or substantial property damage.
Wiring 534HS - 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.
Loop Voltage: 11 to 30 VDC; Output: 4 to 20 mA
}
R
L
(Max) =
V
Supply
- 11V
Formula for determining
maximum loop resistance:
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.