Fluke 744 Fluke 744 Users Manual - Page 86

Calibrating a Limit Switch, Setpoint value.

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744 Users Manual Calibrating a Limit Switch The procedure to calibrate a limit switch also uses the As Found and As Left calibration templates. Select either the 1 Pt. Switch or 2 Pt. Switch procedure in a menu after you press the As Found softkey. Figure 24 defines the terminology used in calibrating limit switches. The template to set up the limit switch procedure lets you select the following parameters: • Switch sense (normally open or closed). • For each setpoint: • Setpoint value. • Setpoint tolerance. • High limit or low limit. • Minimum deadband. • Maximum deadband. 76 Process Variable Switch B Open Deadband Switch B Closed Switch B Setpoint Reset Switch A Closed Reset Deadband Switch A Open Switch A Setpoint Switch A: Low Limit Switch B: High Limit Figure 24. Limit Switch Terminology gj24f.eps

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744
Users Manual
76
Calibrating a Limit Switch
The procedure to calibrate a limit switch also uses
the As Found and As Left calibration templates.
Select either the
1 Pt. Switch
or
2 Pt. Switch
procedure in a menu after you press the
As Found
softkey. Figure 24 defines the terminology used in
calibrating limit switches.
The template to set up the limit switch procedure lets
you select the following parameters:
•
Switch sense (normally open or closed).
•
For each setpoint:
•
Setpoint value.
•
Setpoint tolerance.
•
High limit or low limit.
•
Minimum deadband.
•
Maximum deadband.
Switch A
Open
Switch B
Setpoint
Reset
Switch A
Setpoint
Switch B
Open
Switch B
Closed
Switch A
Closed
Process
Variable
Switch A: Low Limit
Switch B: High Limit
Deadband
Deadband
Reset
gj24f.eps
Figure 24. Limit Switch Terminology