Hach Sigma 900 MAX, User Manual

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112
Maintenance
9.10 Fuse replacement information
Warning
Potential Shock and Fire hazards. Only qualified personnel should conduct the
tasks described in this section of the manual. Always disconnect power to the
sampler before performing any maintenance or service.
DANGER
For continued protection against fire, replace fuses with only fuses of specified
type and current rating.
Table 20 gives details for all the fuses in the sampler. Only the fuse located at the rear of
the 900MAX controller is user-serviceable.
Figure 39 Tightening the nuts on the bottom panel
1 10
2
11
3
12
4
13
5
14 6 15 7
16
8
17
9
Table 20 Fuse listing
Operator
accessible
Location
Reference
designator
Circuit
protection
Size Rating
Hach part
number
No
6251400
Thermal control
circuit board in
the power
control box
under the rear
cover (Fig. 40)
F1
Power supply
output
(15 VDC)
¼ x 1 ¼ inch T, 7A, 250V 6257700
F2 and F3
AC-DC Power
supply (AC)
5 x 20 mm
T, 2A, 250V 6257600
F4 and F5
Optional
controller
heater (AC)
T, 5A, 250V 6610000
Yes
Rear surface of
900MAX
controller (Fig.
38)
None
900MAX
circuits (DC)
M, 5A, 125V 8753
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
Q-Pulse Id VM373 Active 29/10/2013
Page 112 of 122