Appendix B. Optional Enclosures
42 DigitalFlow™ GF868 Service Manual (1 and 2-Channel)
B.3 Rack Mount Fuse Replacement
If it has been determined that the fuse in the Model GF868 requires replacement, refer to Figure 10 on page 49 and
Figure 11 on page 50, and complete the following steps:
1. On the rear panel of the meter, set the power switch to the OFF position and pull the power cord out of its
receptacle.
2. Locate the black plastic fuse cover on the back panel at the bottom of the power cord receptacle and pull it straight
out.
3. Replace the defective fuse with a new one of the same rating and type. Use only 5 x 20 mm Slo-Blo fuses, having a
rating as indicated in Table 7 and on the rear panel label.
4. Reinstall the black plastic fuse cover and insert the power cord back into the receptacle. Then, position the power
switch in the ON position.
The Model GF868 flowmeter may now be placed back into service. Reconnect the main power and resume taking
measurements.
Note: Be sure to record the fuse replacement in Appendix A, Service Record.
WARNING! The main power to the Model GF868 must be disconnected before proceeding.
Table 7: Line Voltages & Fuse Ratings
Line Voltage Fuse Rating
100-120 VAC 1.0 A, Slo-Blo
220-240 VAC 0.5 A, Slo-Blo
12-28 VDC 3.0 A, Slo-Blo
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