Bitronics QTWIE2, Руководство пользователя

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ML0030 August 2009 Copyright 2009 Bitronics, LLC
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3.0 INSTALLATION
WARNING - INSTALLATION AND MAINTENANCE SHOULD ONLY BE
PERFORMED BY PROPERLY TRAINED OR QUALIFIED PERSONNEL.
3.1 Initial Inspection
Bitronics' instruments are carefully checked and "burned in" at the factory before shipment.
Damages can occur, however, so please check the instrument for shipping damage as it is
unpacked. Notify Bitronics immediately if any damage has occurred, and save any
damaged shipping containers.
3.2 Power Requirements
WATT/VAR meters are normally configured for 115V ac, 60Hz power. 230V ac, 50/60Hz
and Universal (AC/DC) are available when requested at the time of order. Power is
connected to the two labeled terminals at the rear of the case as shown in Figure 4 found
on Appendix page A2. Both terminals are electrically isolated from the meter case and
from the electronic circuitry. Variations of the ac supply voltage of +/- 20% will not affect
the performance of the instrument. The power supply and regulators provide constant dc
power to the modules independent of variations in ac supply voltage over this range. If the
supply voltage drops below the point at which the regulators can function properly, the
watchdog timer will cause the displays to flash as described previously.
3.3 Overcurrent Protection
A UL listed 1.5 Ampere non-time delay (M) fuse is to be series connected in the
ungrounded (hot) side of mains input as part of installation of this product.
3.4 Mains Disconnect
Equipment shall be provided with a Mains
Disconnect, that can be actuated by the operator
and simultaneously open both sides of the mains
input line. The Disconnect shall be UL
Recognized and acceptable for the application.
3.5 Instrument Mounting
The instrument may be mounted into a standard
4" panel opening as shown in Figure 2. Adapter
plates are available for larger panel openings.
Figure 3 shows the overall dimensions of the
WATT/VAR meter. WARNING - DO NOT
overtighten the nuts on the mounting studs,
HAND tighten with a standard nut driver, 12 inch-
pounds is recommended, MAXIMUM torque is 15
inch-pounds.
Figure 2 - Mounting Dimensions