QES Labs VARIABLE GM, Owner'S Manual

Page: 3 / 14

3
LOCATION AND VENTILATION
The Variable Gm Compressor must be installed in a stable location with ample
ventilation. It is strongly recommended, when rackmounting this unit, that you allow
enough clearance on the top and bottom of the unit such that a constant air flow is
allowed. The unit is cooled by the air motion (thermal conduction),
heat
spontaneously flows from a hotter to a colder body.
Good ventilation is of the utmost importance.
UNPACKING
Unpack the unit carefully by removing all the custom foam packing material, then
make sure that all supplied accessories are present.
Carefully examine all items for any possibility of shipping damage.

Variable Gm 3U rackmount compressor

External P.S.U.

PSU umbilical cable

2-pc. IEC mains power cords
If the unit is damaged or fails to operate, notify your shipper and us or your local
authorities immediately.
It is prudent to retain the shipping materials for future use.
INSTALLATION
Make sure your mains voltage supply agrees with the voltage this unit is set for.
Make sure that the unit has the proper fuse installed and that the mains switch is OFF.
Connect the input cables to the 3-pin XLR female connectors on the rear panel.
The Input XLRs are transformer coupled balanced wired as follows:
PIN 1 : Ground,
PIN 2 : Hot (positive going phase),
PIN 3 : Cold (negative going phase).