Drawing Number: 21114
Revision: NR
OPERATION MANUAL FOR
ICP
HIGH PRESSURE SENSOR
Series 108B
5
Use a high pressure pump with dial reference gage or
a dead weight tester to apply pressure in desired
increments to full scale. Dump pressure after taking
the reading and before proceeding to the next higher
pressure level.
With a 2000 second discharge TC, 1% of the signal
will be lost in 20 seconds, so it is imperative that the
pressure setting and recording of output be
accomplished quickly.
A calibration graph can then be plotted using output
voltage vs. input pressure.
5.0
OPERATION
Select desired mode of circuit connection and turn
power unit on. Observe fault monitor meter at the
front panel of the power unit.
Normal operation is indicated by an approximate
midscale reading. Shorted cable or connections are
indicated by a zero reading (red area). Open cable or
connections are indicated by a full-scale (yellow area)
reading.
Allow instrument several minutes to warm up and
thermally stabilize.
When output from power unit is connected to readout
equipment, a drifting of the voltage signal will be
noticed. This is normal. It is due to the charging of
the coupling capacitor in the power unit and will
cease within several minutes.
6.0
POLARITY
The series 108B produces a positive-going output
voltage for increasing pressure at the diaphragm.
7.0
MAINTENANCE
The small size and sealed construction of the series
108B precludes field maintenance and repair.
ICP is a registered trademark of PCB Piezotronics