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Chapter 5 Maintenance
5-1
5.0 Introduction
WARNING: There are no user adjustments, or serviceable parts, inside the SQM-160.
For maintenance or repair, contact
Sigma Instruments
1318 Duff Drive
Fort Collins, CO 80524 USA
970-416-9660
5.1 Fuse Replacement
WARNING: Remove the power cable before replacing the fuse.
The SQM-160 is shipped with a ½ A Fuse for use with 90–120 VAC. If your line voltage
is 180–240 VAC, replace the fuse with the ¼A fuse included with your SQM-160.
WARNING: Always replace the Line Fuse with the same size and type fuse
specified above.
Fuse 1/2 A SB at 120VAC
Fuse 1/4 A SB at 240VAC
Line Fuse
Manufactured By
Σ
Model No. SQM-160
Ser No. 80901
instruments
Sigma
Sensor 1 Sensor 2
RS-232
Option A Card
Relay I/O
Option B Card
220
110
10
Ground
Rate Thick
3 4 5 6