Hioki 3257-50, Инструкция по эксплуатации

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4.2 Accuracy
46
Example accuracy calculation
Measurement range: 420.0 V AC
Accuracy specifications: ±1.2% (rdg.) ±3 (dgt.)
Measured value: 100.0 V
Since the value being measured is 100.0 V,
(A) Reading error ( % rdg.): 1.2% of 100.0 V = 1.2 V
(B) Digit error (dgt.): Maximum resolution of 0.1 V, so 3dgt. = 0.3 V
4.2 Accuracy
Accuracy guarantee for
temperature and hu-
midity
Guaranteed accuracy
period 23±5°C(73±9°F), 80%RH or less
1 year
Regulated power sup-
ply range
3.4 V or lower (until the mark
lights up)
(rdg.: displayed value, dgt.: resolution)
Voltage Measurement
Range
[V]
Accuracy
±(rdg.)±(dgt.)
Input Impedance
(Frequency range)
V
420.0 m
4.200
42.00
420.0
1000 ±0.5%±2
±0.5%±2
±0.5%±2
±0.5%±2
±0.5%±2 100 M

or more
Approx. 11M

Approx. 10M

Approx. 10M

Approx. 10M

V
*1
420.0 m
4.200
42.00
420.0
1000 ±1.5%±3*2
±1.2%±3
±1.2%±3
±1.2%±3
±1.2%±6 100M

or more
(50 to 100 Hz)
Approx. 11M

(50 to 500 Hz)
Approx. 10M

(50 to 500 Hz)
Approx. 10M

(50 to 500 Hz)
Approx. 10M

(50 to 500 Hz)
Overload protection (for one minute):
1000 VDC, 1000 Vrms(sin), or 10
7
V
•
Hz
*1: The above measurement accuracies are applied to input of
at least 10% of the full scale.
Crest factor: 3 or lower (except 420.0 mV range)
*2: The above measurement accuracy for the 420.0 mV range
is applied to sine wave inputs.