IPF
Page 6
1. Orient IPF as it will be positioned in the applica-
tion. That is, if unit is to be oriented vertically
when installed, orient vertically to calibrate.
2. With zero air input (supply off), connect 1/4-inch
pneumatic tubing between appropriate output
port of regulated instrument air supply and
calibrated pressure gauge #1 (accuracy of ±2%
of span). Connect another hose from gauge to
port labeled “SUPPLY” on IPF.
3. Connect 1/4-inch pneumatic tubing between IPF
port labeled “OUTPUT” and appropriate port of
pressure gauge #2 (accuracy of ±0.1% of span),
and from that gauge to appropriate pneumatic
load.
4. Run current source wiring through conduit
opening in housing, and to front panel of IPF.
For NE-type units:
Route wiring through
conduit opening in external sub-housing/terminal
block assembly.
5. Connect positive lead of adjustable current
source to +
I
terminal of IPF. Connect negative
source lead to –
I
IPF terminal.
A dc milliammeter may also be connected to
verify level of current input.
6. When connections are complete, apply 0% of
appropriate input current; 4 mA for 4-20 mA
units, or 10 mA for 10-50 mA units.
7. Apply appropriate, filtered, instrument-quality air
to supply line; 20 or 35 psi (40 kPa, or 1.4 bar).
Verify appropriate supply pressure by checking
Supply Pressure field of unit model number.
Figure 2.
IPF Calibration Setup
DC
MILLIAMMETER
ADJUSTABLE
CURRENT SOURCE
PRESSURE GAUGE
#1
(ACCURACY ±2%)
PRESSURE GAUGE
#2
(ACCURACY ±0.1%)
REGULATED
INSTRUMENT
AIR SUPPLY
OUTPUT PORT
SUPPLY PORT
IPF
–I
+I
+
–
PNEUMATIC
TEST LOAD
+
–
