IPF
Page 5
The Zero adjustment screw is a cone-tipped, ma-
chined screw that mechanically provides a control
range for zero offsets of ±3-percent of rated unit
span.
The Span pot electronically adjusts unit full-scale
output to 100-percent of rated span. It requires
approximately 22 turns to move its wiper from one
extreme to the other, clockwise for maximum or
counterclockwise for minimum span.
Figure 1.
IPF Disassembly, Controls, and Terminals for Calibration
TERMINAL
BLOCK
DETAIL
+I -I
N-TYPE
TERMINAL
BLOCK
DETAIL
"TERMINAL CONNECTIONS"
COVER
ZERO
ADJUST SCREW
INTERNAL ASSEMBLY
REMOVAL TAB
SPAN POTENTIOMETER
RUBBER
RETAINING
STRAP
NE-TYPE
It is equipped with a slip clutch to prevent damage if
the adjustment is turned beyond the wiper stop.
Always
use clean, dry, instrument air, whether
calibrating or operating the IPF. Refer to the appen-
dix of this manual for information on filtration.
All pneumatic lines used in calibration and operation
must be “blown down” prior to their being connected
to the IPF. Any condensation or oil residue in the
lines, if introduced into the pneumatic chambers of
the IPF, may result in poor unit performance.
