KYOWA WGA-910A Series Instruction Manual page 31

Checking power voltage
NOTE
Before connecting the power cable to the AC outlet, check the power voltage.
The operating power voltage of the WGA-910A is from 100 to 240 VAC, 50/60 Hz, 20 VA or less. Be sure to
keep this operating power voltage.
If the power voltage exceeds the above specified voltage range or if the power voltage terminal has potential
with excessive power voltage against the ground, no connection is made and it may cause trouble or damage
to the WGA-910A.
How to confirm the power voltage is described in the following.
(1) Measure voltage between AC receptacle terminals with a tester and confirm it is between 100 to 240VAC.
(2)Measure the voltage between the ground and each end of the AC power receptacle with a tester. Confirm one
end has 0 V and the other, 100 to 240 VAC.
(3) If the WGA-910A is used at site using apparatuses generating interfering noise, for example, induction motor,
electric welding machine, etc., power supply condition may be deteriorated due to excessive noise. Take
appropriate countermeasures against the noise by using an insulation transformer or commercially available noise-
cut transformer.
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