Revision 8 SLG 700 SmartLine Level Transmitter User’s Manual Page 97
4.2 Three-Button Operation
The SLG 700 optional three-button interface provides a user interface and operation capability
without exposing the transmitter electronics. Figure 4-1 shows the location of the three-button
option and the labels for each button.
The buttons are accessible by loosening the rightmost screw and rotating the covering
nameplate.
Three-button operation without display
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 ensure these adjustments are only
made when the correct level is present for the setting.
Zero Adjustment
This adjustment is the same as performing a Set LRV using the Display.
1. Connect a current meter or voltmeter to monitor the PV output of the Transmitter (optional,
applicable to HART Transmitters only).
2. Set the level to the desired LRV position.
3. Press the Down (↓ ) and Zero ( ) buttons together to set the Zero.
4. Verify that the output is now 4 mA (optional, applicable to HART Transmitters only).
Span Adjustment
This adjustment is the same as performing a Set URV using the Display.
1. Connect a current meter or voltmeter to monitor the PV output of the Transmitter (optional,
applicable to HART Transmitters only).
2. Set the level to the desired URV position.
3. Press the Down (↓) and Span ( ) buttons together to set the span.
4. Verify that the output is now 20 mA (optional, applicable to HART Transmitters only).
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