CALIBRATION
CALIBRATION PROCEDURES
WBPEEUI110505A0
4 - 3
2. Orient the transmitter in the same position as the final
installation.
3. Allow the transmitter to stabilize for 15 minutes after
power up.
4. Connect the pressure source to the high pressure (+) side
of the cell through the shop calibration fixture.
5. Apply a pressure to the cell equal to the configured or
desired lower range value.
6. The milliammeter should read 4.000,
±
0.032 mA.
7. Apply a pressure to the cell equal to the configured or
desired upper range value.
8. The milliammeter should read 20.000,
±
0.032 mA.
9. If the output is not within the limits specified in Steps 6
and 8, calibrate the unit. To do so, press the CALIBRATE key
on the Type STT terminal and follow the procedure in the
Type STT Smart Transmitter Terminal Instruction
.
10. Turn the negative (-) test terminal jumper screw clockwise
until tight.
D/A ADJUSTMENT (FINE TUNING THE ANALOG LOOP)
This procedure does not require removal of the covers from the
electronics housing. Compensation for slight inaccuracies in
the four to 20-milliampere current loop (or in receiving devices
such as recorders) is accomplished by accessing the calibra-
tion menu on the Type STT terminal while it is connected to
Figure 4-2. Calibration Setup (Typical)
T0261 0A
D C P O W E R
S U P P LY
–
+
+
–
A M M E T E R
S T T
J U M P E R
S C R E W
C A S E
G R O U N D IN G
T E R M IN A L
2 50
± 0.01 %
0 .5 W
M IN
Ω
T B 1
+
+
–
–
TE ST
PW R /
O U TPU T
Содержание Platinum standard Series
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