AMETEK MX CTSH - Manual (Page 53)

California Instruments Revision H 53
User Manual MX Series CTSH Compliance Test System
You may now apply a load to the CTS. Typically, this will be the 230 Volt – 50 Hz supply voltage that is
used to power the products to be tested. This voltage is routed to logical channel 0 of the A/D card, via a
differential input amplifier and a 100: 1 attenuation factor in the PACS. On the Exacq Bench menu bar,
select “Instrument”, “Volt Meter”. Thus, the Exacq Bench DVM function will display approximately 1.00 volt
for a 100 Volt AC voltage setting of the power source, such as may be used in Japan (see the example of
the DVM function below). The display should be about 2.30 Volt rms for a 230 Volt – 50 Hz input voltage.
Note that the system calibration will eliminate small errors due to hardware tolerances. Thus, the ratio is not
necessarily exactly 100:1.
Figure 3-19: Exacq DMM Screen