B-5
Appendix B - Fitting/Calibrating/Testing New Modules
3 If Optical Modules are fitted (option UH1, UH2 or URU), unscrew the optical
shield from each input and output connector.
4 Withdraw the outer cabinet sleeve back and out of the instrument.
5 Remove the clamp screws along the top and bottom right-hand side of the chassis
which secure blanking plates and modules.
CAUTION Modules must be removed and fitted in the correct sequence to prevent damage:
CAUTION From Front to back when removing.
CAUTION From back to front when fitting.
6 Withdraw modules and blanking plates from the instrument.
7 Fit all existing modules plus the new module(s) and blanking plates back into the
instrument in the order shown in Figure B-1 and Table B-2.
8 Secure each module with the two clamp screws.
9 Replace the Optical Shields (if optical module fitted), then fit the Outer Cabinet
Sleeve and Rear Panel feet as a reversal of the removal procedure.
Testing
1 Power on the instrument and check for a sensible display.
2 Carry out the instrument selftests (see page 3-5). If the new module also needs to
be calibrated (see Table B-1), this must be done before running the selftests. Use
the procedures which follow to calibrate the module.
3 You can now carry out the required Performance Tests. When all Performance
Tests have been successfully completed, return the instrument to it’s original
module configuration.
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