Hach 900 MAX ユーザーズマニュアル

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Page 100
Re-installing the Bottom Panel
8990mnt.fm
Section 7
To open the controller:
1.
Remove the 17 screws from around the perimeter of the controller 
back panel.
2.
Carefully pull open the bottom panel and let the attached connectors 
swing out of the way.
3.
If necessary for the repair being performed, unplug the appropriate 
connectors. Always note each connector location before unplugging 
anything. Re-installing a plug into the wrong connector can cause 
extensive damage.
Note: The front panel gasket has a light coating of grease to help ensure a watertight 
seal. Do not contaminate the grease or gasket area with dirt or debris during 
servicing. Always replace the gasket if it is damaged or missing. Never 
reassemble the case without the gasket properly installed.
7.6 Re-installing the Bottom Panel
Note: Always follow the procedure 
below when re-installing the 
sampler bottom panel. Improper 
panel installation may result in 
damage to 
the instrument. 
1.
Hand tighten each nut until it makes contact with the panel.
2.
Tighten the nuts in sequence shown in 
 to 5 in.-lb (0.56 N-m).
3.
Repeat the tightening procedure in the same sequence to 10 in.-lb 
(1.13 N-m).
Figure 30
Tightening the Nuts on the Bottom Panel
1
10
2
11
3
12
4
13
5
14
6
15
7
16
8
17
9