Three Button Operation With No Display Installed; Zero Adjustment; Span Adjustment - Honeywell STT750 SmartLine User Manual

4.3.

Three Button Operation with no Display Installed

When there is no Display installed, the buttons can be used to perform a Zero or Span adjustment of
the Transmitter. Caution should be taken to insure these adjustments are only made when the correct
input values are applied.

4.3.1. Zero Adjustment

This adjustment is the same as performing a Set LRV using the Display.
1. Connect a current meter or voltmeter as shown in
Transmitter.
2. Using an accurate input source, apply a signal equivalent to the Transmitter LRV.
3. Press the Down (
4. Verify that the output is now 4 mA.

4.3.2. Span Adjustment

This adjustment is the same as performing a Set URV using the Display.
1. Connect a current meter or voltmeter as shown in
Transmitter.
2. Using an accurate input source, apply a signal equivalent to the desired Upper Range Value
of the transmitter.
3. Press the Down (
4. Verify that the PV output is now 20 mA.
You can also use the MCT 202 and MCT404 Toolkit to make any adjustments to an
STT750 SmartLine Temperature Transmitter.
Revision 4
↓
) and Zero (  ) buttons together to set the Zero.
↓
) and Span ( ) buttons together to set the span.
STT750 Temperature Transmitter User's Manual
Figure 14 to monitor the PV output of the
Figure 14 to monitor the PV output of the
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