7
Signametrics
2.2 DC Current Measurement
Input Characteristics
Number of built-in shunts
Two
Currents greater than 2.4A
require external shunt
Protected
with 2.5A Fast blow fuse
Accuracy ± (% of r Amps) [1]
Range Full
Scale
5-½ Digits
Resolution Max
Burden
Voltage
One Year 23
C
10
C
2.4 mA
2.40000 mA
10
A
25mV
0.07 + 7
A
24 mA
24.0000 mA
100
A
250mV
0.08 + 9
A
240 mA
240.000 mA
1
A
55mV
0.07 + 60
A
2.4 A
2.40000 A
10
A
520mV
0.2 + 160
A
[1] With measurement rate set to 2rps or lower rate, within one hour from Zero (Relative control).
2.3 Resistance Measurements
2.3.1 2-wire
Accuracy ± (% of r
) [1]
Range [2]
Full Scale
5-½ Digits
Resolution Test
current
One Year
23
C
10
C
240
240.000
1 m
1 mA
0.02 + 100 m
2.4 k
2.40000 k
10 m
1 mA
0.02 + 200 m
24 k
24.0000 k
100 m
100
A
0.02 + 1
240 k
240.000 k
1
10
A
0.06 + 20
2.4 M
2.40000 M
10
1
A
0.06 + 200
24 M
24.0000 M
100
100 nA
0.2 + 25 k
[1] With measurement rate set to 2rps or lower rate, within one hour from Zero (Relative control).
[2] Test voltages are 2.4V max with the exception of the 240
ranges 240 mV.
2.3.2 4-wire
Accuracy ± (% of r
) [1]
Range [2]
Full Scale
5-½ Digits
Resolution Source
current
One Year
23
C
10
C
240
240.000
1 m
1 mA
0.02 + 50 m
2.4 k
2.40000 k
10 m
1 mA
0.02 + 100 m
24 k
24.0000 k
100 m
100
A
0.02 + 500 m
240 k
240.000 k
1
10
A
0.06 + 10
2.4 M
2.40000 M
10
1
A
0.06 + 200
[1] With measurement rate set to 2rps or lower rate, within one hour from Zero (Relative control).
[2] Test voltages are 2.4V max with the exception of the 240
ranges 240 mV.
2.4 AC Voltage Measurements
Input Characteristics
Input Resistance
1 M
, shunted by < 300 pF, all ranges
Max. Crest Factor
4 at Full Scale, increasing to 7 at Lowest Specified Voltage
AC coupled
Specified range: 10 Hz to 100 kHz
Typical Settling time
< 0.5 sec to within 0.1% of final value
Typical Settling time Fast RMS
< 0.05 sec to within 0.1% of final value
