© Arun Microelectronics Ltd 2015
2 Installation
2.1 Checks on receipt of the instrument
On receipt of the instrument remove all packing material and check that all items on the delivery note have been
received. Report any damage or shortages to the Company or the Distributor who supplied the instrument. The
packing material has been specially designed to protect the instrument and should be retained for possible future
use.
2.2 Instrument Installation
Mounting
The instrument is suitable for mounting in a standard 19" rack and occupies 1U ( 1.75", 44.5mm) of the rack. The
mounting holes in the front panel are intended for retaining the instrument in the rack and will not support its
weight. Additional support is required toward the rear and various arrangements are provided by rack
manufacturers for this purpose. Support brackets may be mounted on the tapped M3 fixing holes on the sides near
the rear. If these or other arrangements are attached to these holes, ensure that the screws used are steel and
penetrate the case between 6 and 8 millimetres.
Ventilation
The instrument is ventilated by a fan mounted on the rear panel and through grilles on the right hand side of the
case. The instrument is tolerant of operation at elevated ambient temperatures up to 40 Celsius, although long-
term reliability will be enhanced by operation at the lowest possible temperature. If there are other instruments
in the rack which generate significant amounts of waste heat, try to ensure that this is deflected away from this
instrument.
Connection to the mains supply and earthing
The mains is connected via an IEC CEE22 pattern connector.
THE INSTRUMENT MUST ALSO BE CONNECTED TO EARTH BY THE STUD PROVIDED.
FAILURE TO PROVIDE THIS CONNECTION MAY RESULT IN A SHOCK HAZARD FOR THE
OPERATOR IF EXTERNAL SOURCES OF HIGH VOLTAGES ARE INADVERTENTLY CONNECTED
TO THE OTHER LEADS WHEN THE MAINS LEAD IS DISCONNECTED. SUCH MIS-
CONNECTIONS ARE COMMON IN VACUUM SYSTEMS.
2.3 Fusing
The rating of the mains fuse is printed on the rear panel next to the fuseholder. It must be replaced with a 20mm
x 5mm anti-surge fuse of the same type and rating. Such fuses are marked with a "T" next to the current rating:
ceramic fuses are generally unsuitable, even if so marked. There is provision to house a spare fuse in the fuse
drawer, which is integral to the mains connector. The inner fuse in the drawer is the one connected to the circuit.
It is necessary to disconnect the mains supply when replacing fuses.
