Table of Contents
Advertisement
Installation and
Initial Checks
2.1 Installation
2.1.01 Introduction
2.1.02 Rack Mounting
2.1.03 Inspection
2.1.04 Line Cord Plug
2.1.05 Line Voltage Selection and Line Fuses
Installation of the model 7270 is very straightforward. The instrument can be
operated on almost any laboratory bench or be rack mounted at the user's
convenience. With an ambient operating temperature range of 0 C to 35 C, it is
highly tolerant to environmental variables, needing only to be protected from
exposure to corrosive agents and liquids.
The model 7270 uses forced-air ventilation and as such should be located so that the
ventilation holes on the side and rear panels are not obstructed. This condition is best
satisfied by leaving a space of at least 2" (5 cm) between these panels and any
adjacent surface.
An optional accessory kit, part number K02005, is available from
SIGNAL RECOVERY to allow the model 7270 to be mounted in a standard 19-inch
rack.
Upon receipt the model 7270 Lock-in Amplifier should be inspected for shipping
damage. If any is noted, SIGNAL RECOVERY should be notified immediately and
a claim filed with the carrier. The shipping container should be saved for inspection
by the carrier.
The model 7270 is fitted with a standard IEC 320 input socket on its rear panel and a
suitable line cord is supplied.
Before plugging in the line cord, ensure that the model 7270 is set to the voltage of
the AC power supply to be used.
A detailed discussion of how to check and, if necessary, change the line voltage
setting follows.
CAUTION: The model 7270 may be damaged if the line voltage is set for 110 V
AC operation and is turned on with 220 V AC applied to the power input
connector.
The instrument can operate from any one of four different line voltage ranges, 90-
110 V, 110-130 V, 200-240 V, and 220-260 V, at 50-60 Hz. The change from one
range to another is made by repositioning the plug-in barrel selector internal to the
line input assembly on the rear panel of the unit. Instruments are normally shipped
from the factory with the line voltage selectors set to 110-130 V AC, unless they are
destined for an area known to use a line voltage in the 220-260 V range, in which
case, they are shipped configured for operation from the higher range.
2
Chapter
2-1
Advertisement
Table of Contents
