Micromod RetroPAK: MOD 30 Installation Manual - Manual (Page 28)

MOD 30ML Replacement for MOD 30 Instruments
REPLACEMENT PROCEDURE
3.6 INSTALLING NEW MOD 30ML REPLACEMENT INSTRUMENT
After removing a MOD 30 instrument, the replacement instrument can be installed
in the same panel or bezel opening and connected to the existing MOD 30 cables
using the following procedures.
3.6.1 Mounting
1. If the replacement instrument is not in its housing, insert the instrument and
tighten the screws to draw the front panel tight against the housing. It is
recommended that the housing be mounted with the instrument installed.
This improves the housing rigidity and helps prevent the possibility of
distortion when the mounting screws are tightened.
2 . From the front of the panel, insert the instrument into the panel or bezel
opening.
3 . From the back of the panel, insert mounting brackets into the slots in the
top and bottom of the housing
.
4 . Tighten retaining screws to hold instrument in place. Use torque of 5 inch-
pounds (0.6 Nm), or turn each screw 1-1/2 turns after contact is made with
the back of the panel.
5 . Remove the back cover from the mounted instrument and install the static
drain clip on the back of the housing (the clip is supplied with the
instrument). Locate the clip near the upper right corner as shown in Figure
3-3. This location aligns the clip with a recess in the back cover allowing
the cover to seat properly against the back of the housing with the clip
installed.
6 . Connect the MOD 30 J1 cable to the J1 location in the back cover, Figure
3-4. The cable is attached to the cover using two mounting screws as
shown in Figure 3-2 (cable mounting screws are supplied with the
instrument). Two cables are used when a math unit is replaced; connect
the second cable to location J2
.
7 . Mount the back cover with attached cable on the instrument housing. The
cable connectors must mate with the connectors on the instrument circuit
board
.
8 . Connect the existing drain wire to the static drain clip on the back of the
replacement instrument. The drain wire must connect the replacement
instrument to all other instruments and to ground.
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