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YSVM-46交流直流電流電壓表電工儀表

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YSVM-46交流直流電流電壓表電工儀表

詳細(xì)介紹

YS VM46

Model name	VM46-A -□ VM46-D -□
Measuring function	Measuring of AC, DC Voltage
Rating voltage	AC 110/220V 50/60Hz
Ca¢¯eAu¨ú¨¢¨¬?¥ì¢¯©öuA¡×	rating voltage ± 10%
Permissible voltage variation range	4VA
Power consumption	7 segment LED display
Indication mode	AC:F S+0.5% rdg ± 1 digitDC:F S+0.5% rdg ± 1 digit
Sampling frequency	400ms
Response speed	double integration method
Response speed	approx. 2 sec (from 0 to Max.)
Max. Permissible input	150% of spec. by each range
Display times	2.5 times/sec

Insulation resistance		above 100 ㏁ (DC 500V Meg)
Withstａnd voltage		AC 2,000V/min
Withstａnd noise		surge wave noise by noise simulator(Pulse width 1 ㎲ ) ± 1KV
Vibration	Withstａnd vibration	10 ~ 55Hz(for 1 min of a cycle), double amplitude 0.75mm XYZ 1hr for each direction
	Malfunction	10 ~55Hz(for 1 min of a cycle), double amplitude 0.5mm XYZ 10min for each direction
Impact	Withstａnd impact	300 ㎨ (about 30G)
	Malfunction	100 ㎨ (about 10G)
Ambient temperature		-5 ~ +40 ℃
Relative humidity		45 ~ 85%

Measuring method of AC voltage

When measuring voltage V1 is below AC400V

		※ V2=		(When measuring voltage V1 is above AC 400V)
		※ When voltage intended for measurement is above AC 400V, use a potential
		(V2 voltage shall be below the max. measuring voltage)

Measuring method of DC voltage

When measuring voltage V1 is below DC300V

		※ V2=		(When measuring voltage V1 is above AC 400V)
		※ When voltage intended for measurement is above DC 300V, decide R1, R2 resistance
		value by using the magnification resistance so that V2 voltage may be below the max measuring voltage.

		All the types of voltmeter have auto zero function.
		That is, when measuring input terminal is open or short-circuit, " 000 " in indicated.
		In the case that abnormal letter appear when input is applied, it is because the
		voltage by using magnification resistance.
		When measuring DC voltage, if measuring voltage is above DC300V, separate input
		voltage by using magnification resistance.
		When measuring AC voltage, if measuring voltage is above AC400V, set the
		secondary voltage as below 400V by P.T Indication value mentioned as basic spec
		has 1:1 relations of measuring input and indication value.
		ex) Input : 0 ~ 200V Indication : 0 ~ 199.V Spec number : No. 4

		Measuring methods of voltage of current in AC are divided into two methods, average
		value(AVG) reading method and root mean square(rms) reading method. User can
		choose any method depending on his own judgement. Generally, AVG and rms
		measurement have a difference of approx 1.1 times.
		Yongsung is manufacturing rms indicating type for paractical .

in regualr wave

		(AVG)=0.637Vm(but, Vm is max value)
		Definition of average value : the method taking-out average value by each half-circle in AC wave form.

		Measuring result value of distorted wave form in measuring average value
		In the case of measuring average value, deviation of indication value can be severe
		according to the distortion rate of wave form. Wave form which is close to the regular
		wave has a little deviation in AVG or rms.