Hộp điện trở chuẩn IET Labs HARS-X-4-0.01
HARS-X Series Resistance Decade Box Basic Specifications (Full specifications can be found on datasheet)
Accuracy: ≤1 MΩ steps: ±(0.01% + 2 mΩ) 10 MΩ steps: ±0.03% after subtraction of zero resistance, at 23°C; traceable to SI
Zero Resistance: <1 mΩ per decade at dc for ≤1 MΩ decades: 10 MΩ decade: ≈3 mΩ at dc
Maximum Voltage to Case: 2000 V peak Switches:
Continuous rotation 11 positions marked "0"-"10" Multiple solid silver-alloy contacts
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Resistance per step
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Total decade resistance
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Stability (±ppm/yr)
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Long-term stability (±ppm/3 yrs)
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Temperature coefficient (±ppm/°C)
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Resistor type
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HARS-X
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HARS-X2
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Max current
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Max voltage (per step)
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Max power (per step)
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Max current
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Max voltage (per step)
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Max power (per step)
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1 mΩ
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10 mΩ
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50
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75
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50
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Resistance wire
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8 A
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5 mV
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0.04 W
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9:A
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9 mV
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0.08 W
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10 mΩ
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100 mΩ
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50
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75
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20
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4 A
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40 mV
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0.16 W
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6.3 A
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63 mV
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0.4 W
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100 mΩ
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1 Ω
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50
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75
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20
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1.6 A
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0.16 V
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0.25 W
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2.2 A
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0.3 V
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0.5 W
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1 Ω
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10 Ω
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20
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25
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20
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Wirewound, non-inductive
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0.8 A
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0.8 V
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0.6 W
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1.1 A
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1.1 V
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1.2 W
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10 Ω
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100 Ω
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20
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25
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15
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0.25 A
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2.5 V
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0.6 W
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0.35 A
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3.5 V
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1.2 W
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100 Ω
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1 kΩ
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20
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25
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5
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80 mA
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8 V
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0.6 W
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110 mA
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11 V
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1.2 W
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1 kΩ
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10 kΩ
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20
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25
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5
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23 mA
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23 V
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0.5 W
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35 mA
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35 V
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1.2 W
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10 kΩ
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100 kΩ
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20
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25
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5
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7 mA
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70 V
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0.5 W
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11 mA
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110 V
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1.2 W
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100 kΩ
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1 MΩ
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20
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25
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5
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2.3 mA*
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230 V*
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0.5 W*
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3 mA*
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500 V*
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1 W*
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1 MΩ
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10 MΩ
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20
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25
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5
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0.7 mA*
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700 V*
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0.5 W*
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1 mA*
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1000 V*
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1 W*
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10 MΩ
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100 MΩ
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50
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100
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10
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Metal oxide film
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0.1 mA*
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1000 V*
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0.1 W*
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0.1 mA*
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1000 V*
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0.1 W*
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