MR8740T_Quick guide_eng_20191016H.pdf - 第146页

140 Specications of the Options Measurement accuracy DC voltage 5 V range ±0.030 % of rdg. ± 700 µV T emperature coefcient Add the following value when operating the instrument in temperature ranges of 0°C to 18°C and …

139

Specications of the Options

Output accuracy

DC voltage 5 V range ±0.035% of setting ± 800 µV

Temperature

coefcient

Add the following value when operating the instrument

in temperature ranges of 0°C to 18°C and of 28°C to

40°C.

[0.1 × (output accuracy)] /°C

Output resistance 100 m

or less

Overshoot When an output changes from 0% to 100% of a setting

value

Less than 5% (reference value with resistance load)

Output settling time Time an output signal takes to settle within 0.1% of the

range value when the signal changes from 0% to 100%

of the range

5 ms (reference value with no load)

DC current 5 mA range ±0.050% of setting ± 4.0 µA

Temperature

coefcient

Add the following value when operating

the instrument in temperature ranges of

0°C to 18°C and of 28°C to 40°C.

[0.1 × (output accuracy)] /°C

1 mA range ±0.050% of setting ± 800 nA

Temperature

coefcient

Add the following value when operating

the instrument in temperature ranges of

0°C to 18°C and of 28°C to 40°C.

[0.1 × (output accuracy)] /°C

250 µA range ±0.050% of setting ± 200 nA

Temperature

coefcient

Add the following value when operating

the instrument in temperature ranges of

0°C to 18°C and of 28°C to 40°C.

[0.1 × (output accuracy)] /°C

50 µA range ±0.050% of setting ± 40 nA

Temperature

coefcient

Add the following value when operating

the instrument in temperature ranges of

0°C to 18°C and of 28°C to 40°C.

[0.1 × (output accuracy)] /°C

Overshoot When an output changes from 0% to 100% of a setting

value

Less than 5% (reference value with resistance load)

Output settling time Time an output signal takes to settle within 0.1% of the

range value when the signal changes from 0% to 100%

of the range

5 ms (reference value with short-circuited load)

Resistance Current generation

range

Voltage measurement 0.5 V range Voltage measurement 5 V range

Percent of output

Floor [

]

Percent of output

Floor [

]

5 mA range

0.09 + 0.4000 /

0.10 /

+ 0.1 0.09 + 0.0040 /

0.70 /

+ 0.1

1 mA range

0.09 + 0.0800 /

0.10 /

+ 0.1 0.09 + 0.0800 /

0.70 /

250 µA range

0.09 + 0.0200 /

0.10 /

0.09 + 0.0200 /

0.70 /

50 µA range

0.09 + 0.0040 /

0.10 /

0.09 + 0.0040 /

0.70 /

Current values

are represented in milliamperes.

Output settling time Time an output signal takes to settle within 200% of

the accuracy specication centered on the nal value

(A setting resistance and an output resistance of a

connected object are in a ratio 1:1, with no capacitive

load)

When connected-object presumption is not performed:

1.5 s or less (response coefcient of resistance

generation: 0.0002)

When connected-object presumption is performed: 100

ms or less

Specications

140

Specications of the Options

Measurement

accuracy

voltage

5 V range ±0.030 % of rdg. ± 700 µV

Temperature

coefcient

Add the following value when operating the

instrument in temperature ranges of 0°C to 18°C

and of 28°C to 40°C

[0.05 × (measurement accuracy)] /°C

5 V range

(for resistance

output function

only)

±0.030 % of rdg. ± 100 µV

Temperature

coefcient

Add the following value when operating the

instrument in temperature ranges of 0°C to 18°C

and of 28°C to 40°C

[0.05 × (measurement accuracy)] /°C

current

5 mA range ±0.040 % of rdg. ± 900 nA

Temperature

coefcient

Add the following value when operating the

instrument in temperature ranges of 0°C to 18°C

and of 28°C to 40°C

[0.05 × (measurement accuracy)] /°C

1 mA range ±0.040 % of rdg. ± 180 nA

Temperature

coefcient

Add the following value when operating the

instrument in temperature ranges of 0°C to 18°C

and of 28°C to 40°C

[0.05 × (measurement accuracy)] /°C

250 µA range ±0.040 % of rdg. ± 45 nA

Temperature

coefcient

Add the following value when operating the

instrument in temperature ranges of 0°C to 18°C

and of 28°C to 40°C

[0.05 × (measurement accuracy)] /°C

50 µA range ±0.040 % of rdg. ± 10 nA

Temperature

coefcient

Add the following value when operating the

instrument in temperature ranges of 0°C to 18°C

and of 28°C to 40°C

[0.05 × (measurement accuracy)] /°C

Effect of radiated

radio-frequency

electromagnetic eld

1% f.s. (Max.) at 3 V/m (for DC voltage output function)

Effect of conducted

radio-frequency

electromagnetic eld

1% f.s. (Max.) at 3 V (for DC voltage output function)

No accuracy is specied for AC voltage output and AC current measurement.

141

Specications of the Options

Self-diagnosis

Operation

comprehensive

test

The instrument outputs the following signals with the

voltage and current functions, measuring them using the

internal measurement circuit.

If a measured value differs from the corresponding output

setting value by more than the threshold value, the

instrument gives itself a fail judgment.

The instrument returns a judgment result, output setting

value, and measured value in response to a query.

The threshold value of 0% causes the instrument to fail to

judge.

Voltage function 0 V, .0.5 V, 5 V

Current function 0 µA, 50 µA, 55 µA, 250 µA,

275 µA, 1 mA, 1.1 mA, 5 mA

Threshold

value

Setting

range

0% to 10%

Setting resolution: 1%

Default

setting

Simple test Using the internal measurement circuit, the instrument

measures an signal outputted when a command is sent.

The instrument returns an output setting value and

measured value in response to a query.

Switching OUTPUT

terminals

Relay switching time

Operation

OPEN:

SHORT:

NORMAL:

Opens the circuit of the OUTPUT terminal.

Connects the OUTPUT terminal to ground. (10

or less with a

load current of 5 mA)

Outputs the specied signal across the OUTPUT terminal.

Default

setting

OPEN

Connected-object

presumption

Operation With the resistance generation function, the instrument presumes an output

resistance value of the connected object, capacitance value between the

OUTPUT and GND terminals, and voltage value across them.

Optimizes a resistance-generation response coefcient based on the

presumption.

When the time constant based on an output resistance value and inter-

terminal capacitance value is less than 10 ms, the inter-capacitance is

determined to be 0 pF.

Calculation

time

1.6 seconds (max.)

Offset cancel

Operation

Measures an output-circuit offset with the measurement circuit and outputs

a signal with the offset subtracted.

Default

setting

Off

Specications