Hioki DM7275 Series, Инструкция по эксплуатации

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155
Measurement Specifications
Accuracy specifications
Conditions of guaranteed
accuracy
Guaranteed accuracy period:
1 year
Temperature and humidity for guaranteed accuracy:
23°C ±5°C (73°F ±9°F), 80% RH or less
Warm-up time: 1 hr.
Measurement cable
Low thermal electromotive force cable (FLUKE 5440A-7005)
Voltage measurement
accuracy
DM7275-01, DM7275-02, DM7275-03:
See “Separate table 1 (DM7275)” (p. 156).
DM7276-01, DM7276-02, DM7276-03:
See “Separate table 2 (DM7276)” (p. 156).
Additional errors:
•Temperature coefficient
From 0°C to 18°C and from 28°C to 40°C, add the following value per 1°C of
temperature:
100 mV to 10 V range: ±0.05 × measurement accuracy/°C
100 V, 1000 V range: ±0.1 × measurement accuracy/°C
•Voltage coefficient error
Add the following value to the rdg. error component if the voltage display value
Vin exceeds ±300 V:
DM7275: 0.0010% × (Vin / 1000)
2
DM7276: 0.0005% × (Vin / 1000)
2
•Noise error (excluding effects of burst noise)
Integration time
T
I
Additional error
10 PLC ≤
T
I
None
1 PLC ≤
T
I
< 10 PLC 0.0001% of range ± 0.5 µV
0.2 PLC ≤
T
I
< 1 PLC 0.0003% of range ± 1 µV
0.02 PLC ≤
T
I
< 0.2 PLC 0.0010% of range ± 2 µV
•Temperature compensation error
When using temperature compensation, add the following value to the
resistance measurement accuracy’s rdg. error component:
( )
0
100[%]
1
T
T T T
α
α
− ∆
×
+ × + ∆ −
T
0
: Reference temperature [°C]
T
: Current ambient temperature [°C]
∆
T
: Temperature measurement accuracy α : Temperature coefficient [1/°C]
•Measurement cable error
Temperature difference of no greater than 1°C between the instrument and the
measurement cable/measurement target
Add individual error components if connecting cables in series.
L9207-10 Test Lead
L4933 Contact Pin Set
L4932 Test Pin Set
10 µV
L4934 Small Alligator Clip Set
L4935 Alligator Clip Set
7 µV
9243 Grabber Clip
L4936 Bus Bar Clip Set
5 µV
L4931 Extension Cable Set 3 µV
L4930 Connection Cable Set 2 µV
•Effects of radiative radio-frequency magnetic field: 3% of range at 10 V/m
•Effects of conductive radio-frequency magnetic field: 3% of range at 3 V
13
Specifications
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