MAINTENANCE
ST100A Series Flow Meter
90
Fluid Components International LLC
Power Fuse Replacement
Warning:
Make sure system power is OFF before replacing the fuse.
Input power overload protection is provided by a clip-mounted SMT fuse.
below summarizes the ST80/ST80L power fuse. Open
the blind lid (refer to instructions in
) to access the power fuse. The fuse is on the opposite side of
the P1 power connector near the edge of the power supply board. See
below. Although a plastic shield covers this area of the
board, the fuse remains accessible.
Figure 67 – Fuse Location, Power Supply Board
(a) AC Power
(b) DC Power
C01425-1-1
SMT Fuse (in clip):
Schurter UMZ 250,
2 A/250 VAC
Power Connector (Opposite Side)
SMT Fuse (in clip):
Schurter UMZ 250,
2 A/125 VDC
Power Connector (Opposite Side)
Checking/Replacing the Fuse
To check the SMT fuse first turn instrument power OFF. Replace a fuse with obvious damage (e.g., burnt, broken). Take a resistance
reading across the fuse (fuse clip ends). See
above. Any reading other than a short (i.e., open circuit) indicates a blown fuse.
Replace with the appropriate Schurter UMZ 250 fuse as listed in
below. Reinstall the blind lid.
Table 26 – Power Fuse Summary
Qty
FCI Assembly P/Ns
Description
Mfgr. P/N
FCI P/N
1 025806-01 (AC-DC Power Supply) SMT fuse (in clip), Schurter UMZ 250,
2 A, 250 VAC/125 VDC, time-lag
3404.2419.11
026095-02
1 025810-01 (DC-DC Power Supply)
Summary of Contents for ST100A Series
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