Chapter Eight: Maintenance and Troubleshooting
Troubleshooting
131
Overrange (>10.5 Volts) Pressure Readings
1. Verify that all vacuum fittings are tight and that the transducer is properly pumped down
below its resolution.
Low range absolute transducers (100 mmHg and below) will be overranged at
atmospheric pressure.
2. Connect another meter, either analog or digital, to the output to verify that the display of
the 670 instrument is operating correctly.
3. Press the [
SETUP
] key on the front panel of the 670 instrument.
The system responds by displaying the setup parameters.
4. Repeatedly press an arrow key, ( [
] or [
] ), until the pressure units screen
appears.
5. Use the Adjust knob to select mmHg as the pressure units.
6. Press the [
CAL
] key to enter the calibration screen.
7. Press an arrow key, ( [
] or [
] ), until the system check screen appears.
Ch 1
9.8799 Volts
SYSCHK
The SYSCHK reading should be between 9.5 and 10.5 Volts. A SYSCHK value outside
this range, indicates a problem with the pressure transducer or its cable.
8. Perform the steps outlined in the flow chart in Figure 18, page 132.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
