Chapter 1. Calibration
10 DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Service Manual
1.6.2 Testing the Alarm Relays
Note: The procedure for testing Alarm Relay A is identical to that for testing Alarm Relays B and C. However, make sure
that the ohmmeter is connected to the desired normally-open or normally-closed contact of the currently
selected relay. See Figure 4 on page 9 for the correct pin numbers on the option card terminal block.
4. Pressing
[F1] (CLOSE) should yield an ohmmeter reading of about zero. Pressing [F2] (OPEN) should yield an infinite
ohmmeter reading.
5. Press [F3] to EXIT.
6. Repeat the above procedure until both the normally-open and normally-closed contacts for all three alarm relays
have been tested. Then, proceed to Procedure Options below.
Procedure Options
You have completed testing the alarm relays. Do one of the following:
• To calibrate/test additional slots, press [F4] (EXIT) and proceed to the appropriate section.
• To leave the Calibration Menu, press [EXIT] twice.
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