Teledyne 3220 - Multi-channel oxygen monitor system - Manual (Page 36)

3 Installation Model 3220
Teledyne Analytical Instruments 22
3.7 Channel Modules
Channel Modules may be removed by first unscrewing the top
(retaining) screw and then unscrewing the bottom (jack) screw. As the
jack screw is backed out, it will pull the module from its socket. When
the jack screw is free, the module may be slid out by pulling on the two
screws. In the event it is desired to remove a channel module without
disturbing the common alarm circuits, the channel module may be
switched into standby mode, by pressing the STANDBY switch (see
section 4.3), before removal. Reinstallation of the channel module may
be accomplished by sliding the module into the chassis until the top and
bottom screws can be engaged, engaging them, tightening the bottom
(jack) screw to reconnect the module, and then tightening the top
(retaining) screw.
WARNING: DISCONNECT POWER BEFORE PERFORMING ANY
OF THE FOLLOWING. THESE OPERATIONS
SHOULD ONLY BE PERFORMED BY A QUALIFIED
SERVICE TECHNICIAN.
3.7.1 Removing the Channel Module Cover
In order to perform the actions in the following sections 3.7.2, 3.7.3
and 3.7.4, the cover of the channel module must be removed. To
remove the cover:
1. Unscrew the two 6-32 screws that hold the cover in place.
2. Slide the cover out.
3.7.2 Changing the Fuse
Remove the channel module cover as in section 3.7.1. The fuse is
located as shown in the Figure 3-2.