8.Press F4 (CABLE) to change to the cable input. The meter will return to the First Menu Screen. Press Esc to return to the measurements screen.

System Checks

To insure that the entire system – meter, fiber optic

transmitter, and probe – are functioning properly...

1.Set the 8718B to use the fiber optic receiver input as previously described.

2.Connect the probe to the fiber optic transmitter.

3.Connect a fiber optic cable between the meter and the fiber optic transmitter.

4.Check the battery charge level in the transmitter by turning switch S1 (BATT TEST–ON) to BATT TEST. Verify that the green LED is illuminated which signifies that the battery is adequately charged for operation. If the LED fails to illuminate, charge the transmitter overnight. A full-battery charge takes approximately 16 hours.

5.Set S1 to the ON position and S2 to the NORM position.

6.Zero the 8718B using the standard procedure.

7.Move S2 ( CAL1–NORM–CAL2) to the CAL1 position. The meter should read 45-55% of the full scale rating of the probe. The actual error from the combination of the 8718B and the fiber optic transmitter is less than (±3%).

8.Move S2 to the CAL2 position. The meter should read approximately 25% higher than the CAL1 position. The exact value is not critical.

9.Set S2 to the NORM position to begin making measurements providing that all the system checks were successfully completed.

98

Operating the Meter