Calibrating A Limit Switch - Fluke 741B User Manual

741B/743B
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
procedure in a menu after you press the
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.
74
or
2 Pt. Switch
As Found
Deadband
Process
Variable
Deadband
Switch A: Low Limit Switch B: High Limit
Figure 24. Limit Switch Terminology
Switch B
Open
Switch B
Setpoint
Reset
Switch B
Closed
Switch A
Closed
Reset
Switch A
Setpoint
Switch A
Open
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