FCI MT100 - Power Fuse Replacement; Lithium Battery Replacement; Figure 50 - Lithium Coin Cell Battery (CR2450) Location; Table 22 - Power Fuse Summary

MAINTENANCE MT100 Multipoint Flow Meter
Power Fuse Replacement
Warning:
Make sure system power is OFF before replacing the fuse.
Input power overload protection is provided by a socketed radial lead fuse. Table 22 below summarizes the power fuse used in the MT100
Series. Figure 23 on page 26 shows the fuse location on the power supply board in the remote electronics enclosure.
To check the integrity of a radial lead fuse first turn instrument power OFF. Unscrew the fuse socket’s clear plastic cap and pull out the
fuse. Measure the fuse resistance. Any reading other than a short (i.e., open circuit) indicates a blown fuse. Replace with the appropriate
Littelfuse TR5, Series 383 fuse as listed in Table 22 below.
Table 22 – Power Fuse Summary
Qty
FCI Assembly P/Ns
Description
Fuse Mfgr P/N
FCI Fuse P/N
1
024539-01 (DC-DC Power Supply)
024555-01 (AC-DC Power Supply)
Radial lead fuse, Littelfuse TR5
Series 383, 2 A/300 V, time-lag
3831200000
022499-01
Lithium Battery Replacement
Warning:
Make sure system power is OFF before replacing the battery.
A 3-volt lithium coin cell battery powers the MT100 real time clock (RTC). Typical service life of the battery is two years. Replace the
battery every two years with a type CR2450 coin cell battery. Figure 50 below shows the location of the lithium battery on the SB4 (main)
board. Install the battery in the coin cell holder with the positive (+) side facing up.
Figure 50 – Lithium Coin Cell Battery (CR2450) Location
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