American Magnetics 135 & 136 Liquid Helium Level Instruments (CE-Marked) - Manual (Page 25)

Rev. 3 13
Installation
Verifying power requirements
2.6 Connecting the Instrument to Power
Warning
The Model 135/136 operates on 50-60 Hz power and may be
configured for 100-120 or 200-240 VAC ±10%. The power
requirements for the instrument is marked on the calibration sticker
on the bottom of the instrument. Verify that your instrument is
configured for your power source prior to plugging in the line cord.
Do not fail to connect the input ground terminal securely to an
external earth ground.
Verify that the instrument is configured for the proper operating voltage
by referring to the calibration sticker affixed to the bottom of the
instrument. If the operating voltage is correct, plug the line cord into the
appropriate power receptacle.
Caution
Do not install the instrument in a manner that prevents removal of
the line cord from the rear panel of the instrument.