7451A/7461A/7461P Digital Multimeter Operation Manual
7.1.3 Resistance Measurement (2W
, LP-2W
, 4W
, LP-4W
)
7-7
7.1.3
Resistance Measurement (2W
, LP-2W
, 4W
, LP-4W
)
•
7461A/61P
2W
and 4W
measurements
Low Power 2W
and 4W
measurements (LP-2W
/LP-4W
)
Response time:
100 M
= 5 s
(Time until the measurement value reaches within 0.1% of the final value)
1 M
/10 M
= 0.5 s
(Time until the measurement value reaches within 0.1% of the final value)
Range
Maximum
display
Resolution
Measurement
current
Measurement accuracy *1
(% of r digits)
Temperature coefficient *4
(ppm of r digits)/
C
24 hours
23
C
1
C *2
90 days
23
C
5
C
1 year
23
C
5
C
Auto-zero
ON
Auto-zero
OFF
100
119.9999
100
10 mA
0.0030+30.0
0.0060+35.0
0.0080+35.0
6.0+5.0
6.0+5.0
1000
1199.999
1 m
1 mA
0.0020+5.0
0.0060+5.0
0.0080+8.0
6.0+1.0
6.0+5.0
10 k
11.99999
10 m
100
A
0.0020+5.0
0.0060+5.0
0.0080+8.0
6.0+1.0
6.0+5.0
100 k
119.9999
100 m
10
A
0.0020+5.0
0.0060+5.0
0.0080+8.0
6.0+1.0
6.0+5.0
1000 k
1199.999
1
5
A
0.0020+10.0
0.0060+30.0
0.0080+30.0
10.0+5.0
10.0+7.0
10 M
11.99999
10
500 nA
0.0150+10.0
0.0200+30.0
0.0300+30.0
30.0+5.0 *3
30.0+7.0 *3
100 M
119.9999
100
50 nA
0.3000+100.0
0.5000+100.0
0.6000+100.0
700.0+5.0
700.0+7.0
*1
Integration time: 10 PLC, Auto-zero: ON for 2W
, Display digit: 6 1/2
The measurement cable resistance and 0.2
(internal circuit resistance error) are added to the digit error in 2W
measurement.
*2
Relative value with respect to the calibration standard
*3
15 ppm/
C is added to the temperature coefficient in the temperature range of 30
C to 50
C.
*4
The temperature coefficient in Auto-zero ON is used in the 4W
measurement.
Range
Maximum
display
Resolution
Measurement
current
Measurement accuracy *1
(% of r digits)
Temperature coefficient *4
(ppm of r digits)/
C
24 hours
23
C
1
C *2
90 days
23
C
5
C
1 year
23
C
5
C
Auto-zero
ON
Auto-zero
OFF
100
119.9999
100
1 mA
0.0030+30.0
0.0070+50.0
0.0100+60.0
6.0+5.0
6.0+8.0
1000
1199.999
1 m
100
A
0.0020+30.0
0.0070+50.0
0.0100+60.0
6.0+5.0
6.0+8.0
10 k
11.99999
10 m
10
A
0.0020+30.0
0.0070+50.0
0.0100+60.0
7.0+5.0
7.0+8.0
100 k
119.9999
100 m
5
A
0.0020+15.0
0.0070+50.0
0.0100+60.0
10.0+5.0
10.0+25.0
1000 k
1199.999
1
500 nA
0.0150+15.0
0.0450+50.0
0.0500+60.0
65.0+5.0 *3
65.0+8.0 *3
10 M
11.99999
10
50 nA
0.3000+100.0
0.6000+100.0
0.8000+100.0
700.0+5.0
700.0+8.0
*1
Integration time: 10 PLC, Auto zero: ON for 2W
, Display digit: 6 1/2
The measurement cable resistance and 0.2
(internal circuit resistance error) are added to the digit error in 2W
measurement.
*2
Relative value with respect to the calibration standard
*3
15 ppm/
C is added to the temperature coefficient in the temperature range of 30
C to 50
C.
*4
The temperature coefficient in Auto-zero ON is used in the LP-4W
measurement.
