Agilent Technologies DC140 Uživatelský manuál stáhnout pdf (Strana 5)

Digital multimeter specifications (continued)

DC specifications (continued)

Table 1. DC accuracy specifications ± (% of reading + % of range)

Function Range

Resolution

Test

current

or burden

voltage

24 hours

23 ºC ± 1 ºC

90 days

23 ºC ± 5 ºC

1 year

23 ºC ± 5 ºC

Temperature

coefficient

0 to 18 ºC

28 to 55 ºC

Low-

resistance

100 mΩ

1000 mΩ

10 Ω

100 Ω

1000 Ω

0.01/0.001 mΩ

0.1/0.01 mΩ

1/0.1 mΩ

10/1 mΩ

0.1/10 mΩ

1,0000 A

100.00 mA

10.00 mA

—

0.25 + 0.05

0.25 + 0.03

0.09 + 0.03

—

Continuity 1.0000 kΩ 100 mΩ 0.83 mA 0.04 + 0.005 0.04 + 0.005 0.05 + 0.005 0.0050 + 0.0005

Diode

1.0000 V 0.0001 V 0.83 mA 0.04 + 0.005 0.04 + 0.005 0.05 + 0.005 0.0050 + 0.0005

Capacitance

1.000 nF

10.00 nF

100.00 nF

1.000 µF

10.00 µF

100.0 µF

1000 µF

10000 µF

0.001 nF

0.01 nF

0.1 nF

0.001 μF

0.01 μF

0.1 μF

1 μF

0.75 µA

current

source

0.75 µA

8.3 µA

83 µA

0.83 mA

—

2.0 + 0.8

1.0 + 0.5

2.0 + 0.5

0.02 + 0.001

1. 20% over-range on all ranges, except for 1000 V

range.

2. Relative to calibration standards.

3. Any current measurement greater than 500 mA will have a temporary thermo-effect. If you wish to measure a lower current or offset current im-

mediately after a high-current measurement, ensure that the U3606A has cooled down.

4. Specifications stated are for 2-wire resistance measurements using Null math operation. Without Null, add a 0.2 Ω error. To eliminate noise interfer-

ence which may be induced by the test leads, a shielded test cable is recommended for resistances above 100 kΩ.

5. Specifications stated are for 4-wire low-resistance measurements. The test current is sent from the FORCE terminals and the resistance is measured

by the SENSE terminals.

The contact strength may influence the measuring result significantly. Ensure that the connection of the test point is firm to avoid resistance due to

contact leads.

The accuracy is specified after source compensation due to environment temperature changes. Initiate the compensation by exiting and entering the

Lo-Ω function or by disabling and enabling the output.

The measuring current will be reduced automatically when the product of the test current and resistance exceed 7.5 V. Refer to the test current and

resistance as shown below:

Test current Maximum test resistance Test current Maximum test resistance

4 mA < 1200 Ω 8 mA < 938 Ω

5 mA < 1200 Ω 9 mA < 834 Ω

6 mA < 1200 Ω 10 mA < 750 Ω

7 mA < 1072 Ω — —

6. Specifications stated are for the voltage measured at the input terminals only. The test current (1 mA) is typical. Variation in the current source will

create some variation in the voltage dropped across a diode junction.

7. Specifications stated are for open test lead measurements and film capacitor or better using the Null math operation.

For the total measurement accuracy, add the probe error. The contact strength will significantly influence the measuring

result. Ensure proper contact at the test point you want to measure.

1 2 3 4 5 6 7 8 9 10 ... 18 19

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