CALIBRATION
CALIBRATION PROCEDURES
4 - 4
WBPEEUI110506A0
2.
The loop resistor must have a tolerance of 0.01 percent or bet-
ter in order for this procedure to be valid.
3.
If a resistor value other than a 250 ohms is used, the voltage
output will be different according to Ohms law:
4.
Throughout this procedure, the voltage values, based on a
250-ohm resistor, will be shown in parentheses following the milliam-
pere values.
1. Press the CALIBRATE key on the Type STT terminal.
2. Use the up arrow and down arrow keys to scroll through
the menu and select
D-A ADJUSTMENT.
3. Press the ENTER key.
4. The instruction,
ADJUST TO 4 mA THEN HIT ENTER
appears on the display. Use the up arrow and down arrow keys
to adjust the output to 4.000 mA (1.000 VDC) plus or minus
the tolerance for the particular transmitter listed in Table
If using a receiving device (e.g. recorder), adjust for a
zero-percent indication.
5. Press the ENTER key.
6. The message,
ADJUST TO 20 mA THEN HIT ENTER
appears
on the display. Use the up arrow and down arrow keys to
adjust the output to 20.000 mA (5.000 VDC) plus or minus the
tolerance for the particular transmitter listed in Table
. If
using a receiving device, adjust for a 100-percent indication.
7. Press the ENTER key.
Digital Mode Calibration
1. Mount and connect the transmitter in a calibration setup
such as the one shown in Figure
NOTE: Turn the - (negative) test terminal jumper screw ½-turn
counterclockwise.
2. Orient the transmitter in the same position as the final
installation.
3. Connect the pressure source to the cell.
4. Apply a pressure to the cell equal to the configured or
desired lower range value.
5. Since the transmitter configuration is for digital operation,
the milliammeter should read below four milliamperes.
V
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Summary of Contents for platinum standard PTSP Series
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