CALIBRATION
REZERO PROCEDURE
4 - 6
WBPEEUI110506A0
and the temperature alarm can also be adjusted during
rerange.
NOTE: The transmitter output is based on the values entered in this
procedure. The terminal will not reject invalid ranges; therefore, it is
imperative that the operator know the range limits specified for the
transmitter. Refer to Table
for the proper ranges.
REZERO PROCEDURE
This procedure zeroes the transmitter only and does not com-
pensate for slight inaccuracies in the four to 20-milliampere
current loop. To adjust for these inaccuracies, refer to
ADJUSTMENT (FINE TUNING THE ANALOG LOOP)
.
By pressing the REZERO key on the Type STT terminal, the
transmitter can be zeroed without performing a complete
bench calibration. There is no effect on the span of the
transmitter.
VERIFYING CALIBRATION WITH THE EZ CAL OPTION
NOTE: The EZ CAL option is for zero and span validation only. Do
not use it to make large adjustments to the zero or span of the trans-
mitter. The EZ CAL option provides no means to indicate if an error
is made.
1. If not installed, refer to the
for installation
procedures.
2. Open the dust cover on the EZ CAL option.
3. Connect the pressure source to the cell.
4. Apply a pressure to the cell equal to the configured lower
range value.
5. Turn and hold the adjustment screw on the EZ CAL option
in the zero direction (indicated on the EZ CAL option) for at
least three seconds. The transmitter automatically adjusts the
output to zero percent.
6. Apply a pressure to the cell equal to the configured upper
range value.
7. Depress the span lock and turn and hold the adjustment
screw on the EZ CAL option in the span direction (indicated on
the EZ CAL option) for at least three seconds. The transmitter
automatically adjusts the output to 100 percent.
Summary of Contents for platinum standard PTSP Series
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