How To Toggle the Span On and Off
Chapter Five: Operation in Leakage Mode
142
How To Toggle the Span On and Off
Once a sensor has been spanned, use this procedure to toggle between undoing the span, and then
re-instating the span. This procedure does not apply to capacitance manometers. When the span
is toggled off, the factory-defined span is used for the display of pressure. Refer to How To
Perform Sensor Calibration/MFC Setup, page 190, to view whether the factory-defined or user-
defined span is in effect.
1. Repeatedly press the [
DISPLAY MODE
] key until the 146 unit is in Leakage Mode.
The system responds by scrolling through modes.
2. Press the [
SPAN
/.] key, then the [
OFF
/
GAIN
] key, followed by [1], [2], [3], or [4].
The system responds by bypassing the user-defined span for the sensor on the channel
number selected.
3. Press the [
SPAN
/.] key, then the [
ON
/
LEAD
] key, followed by [1], [2], [3], or [4].
The system responds by undoing the previous command, and restoring the channel’s
user-defined span.
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