SECTION 5: INSTALLATION AND COMMISSIONING
GENERAL
1When these units are used for indirect connection to datel and data networks, private circuits, PSTN and PBXs, the following caution must be complied with.
1.1When connection is made to the ALARMS port, take note that these ports do not provide insulation sufficient to meet the needs of BS EN 41003:1993. Apparatus connected to these ports should either be approved to BS EN 41003, or have previously been evaluated against British Telecommunications PLC (Post Office) Technical Guides 2 or 26 and given permission to attach to British Telecommunications networks. Other usage will invalidate any approval given to the apparatus. The ports are labelled in accordance with clause 5.2 of BS EN 41003 as follows:
'ALARMS - SAFETY WARNING See Instructions for use'
1.2In addition, if these ports are accessible for connection to other equipment external to the host equipment, this port must be suitably labelled. Interconnection directly or by way of other apparatus to the ports labelled 'SAFETY WARNING See instructions for use' with a port not so marked may produce hazardous conditions on the network and advice should be sought from a competent engineer before such a connection is made.
VOLTAGE MONITOR SETTINGS
Note: The exact monitor settings for individual units are measured and recorded prior to despatch from the factory, using precision voltmeters.
2In order to avoid spurious fault reports, ensure that the following are observed when carrying out voltage measurement tests.
2.1Check that fuse FS2 is correctly inserted.
2.2Wait five minutes after connection of the dc power supply to allow the monitor circuits to stabilise.
2.3When observing the operating voltage of a monitor setting:
2.3.1Change the power supply voltage slowly and gradually by 0.05 V steps, pausing between each step.
2.3.2When a 0.05 V step results in monitor operation, record the voltage indication immediately prior to that step; this is the monitor operating voltage. (Ignore any change in voltmeter reading after operation.)
2.4When recording any apparent discrepancy in the service log (Appendix A), note both the reading observed and the voltmeter type used, together with its accuracy rating (e.g. 'Fluke 75: ± 0.14 V' or 'Fluke 77: ±0.09 V'). Note that many portable multimeters are less accurate than might be suggested by the number of digits displayed.
PRE INSTALLATION TEST
3If required, a pre installation test may be carried out prior to the installation and commissioning. This is basically a
Note: A full pre installation test may not be possible, as specialised test equipment is required.
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