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5.
Resistance Reading for the CVT 275/
CONVECTRON
®
Sensor Tube
For the CVT 275/CONVECTRON® gauge, you can measure to see if it has the correct internal
resistance values. If the measured values differ from those shown, it is possible that your gauge
has become damaged. These measurements must be made while the gauge is at atmospheric pres-
sure; do not use a method which applies more than 10 mA to the pins or you will damage the fine
internal wires.
between pins
resistance
1 and 2
20 ohm to 30 ohm
2 and 3
50 ohm to 60 ohm
1 and 5
175 ohm to 190 ohm
Figure 11: Resistance Readings for a Good CVT 275/CONVECTRON tube
If the resistance between pins 1 and 2 measures approx. 800 ohms, it means the internal sensor
wire is broken and the CONVECTRON® gauge must be replaced.
TELEPHONE: 650-969-8811 TOLL-FREE (U.S. only): 800-446-8811 FAX: 650-965-0764 EMAIL: [email protected]
www.duniway.com
