Strain Gauge Transducer Test - GE Corometrics 170 Series Service Manual

Strain Gauge Transducer Test

6-22
Functional Checkout Procedure: Strain Gauge Transducer Test
1. Inspect a strain gauge as follows:
Unscrew the plastic dome from the transducer and check for any cracks or
contaminants on the transducer.
Visibly assess the condition of the cable, strain relief, and the connector
pins.
2. Connect the strain gauge to the
monitor. Verify the following on the monitor:
The UA value may read negative numbers indicating baseline pressure is
off scale. In this case, the message
the strip chart paper.
After approximately 20 seconds, the message
margin of the strip chart paper.
3. Select the monitor's
monitor:
The UA value is 0 mmHg.
The UA trend is a continuous line at 0 mmHg on the strip chart paper.
The message
4. Apply gentle pressure on the strain gauge diaphragm and verify that the UA
value and trend respond to the input. Increasing force should produce an
increasing value and vice versa.
5. Disconnect the strain gauge from the front panel of the monitor. Verify the
following on the monitor:
The UA value is blank.
The UA trend stops plotting on the strip chart paper.
After approximately 20 seconds, the message
chart paper.
170 Series Monitor
2000947-004
input receptacle on the front panel of the
UA
BASELINE PRESSURE OFF SCALE
button and verify the following on the
UA Reference
prints on the strip chart paper.
UA REF
prints on
prints on the center
IUP
prints on the strip
UA INOP
Revision C