9
Signametrics
2.0 Specifications
2.1 DC Voltage Measurement
Input Characteristics
•
Input Resistance
330 mV & 3.3 V Ranges: >10 G
Ω
,
•
Input Resistance
33 V & 330 V Ranges: 10.0 M
Ω
Accuracy ± (% of r Volts) [1]
Range Full
Scale
6 ½ Digits
Resolution
24 hours
23
°
C
±
1
°
C
90 Days
23
°
C
±
5
°
C
One Year 23
°
C
±
5
°
C
330 mV
330.0000 mV
100
η
V
0.003 + 4.5
µ
V
0.004 + 5.5
µ
V
0.007 + 8
µ
V
3.3 V
3.300000 V
1
µ
V
0.002 + 10
µ
V
0.0025 + 12
µ
V
0.0045 + 17
µ
V
33 V
33.00000 V
10
µ
V
0.003 + 250
µ
V
0.004 + 280
µ
V
0.007 + 330
µ
V
330 V
330.0000 V
100
µ
V
0.004 + 1 mV
0.005 + 1.2 mV
0.008 + 1.5 mV
[1] With reading rate set to 10 readings per second (rps) or slower, and within one hour of DCV
zero, using Relative control.
DCV Noise Rejection
Normal Mode Rejection, at 50, 60, or 400 Hz ± 0.5%, is better than 95 dB
for reading rates of 10 rps or lower. Common Mode Rejection (with 1 k
Ω
lead imbalance) is better
than 120 dB for these conditions.
2.2 DC Current Measurement
Input Characteristics
•
Burden Voltage
< 350 mV for all ranges
•
Protected
with 2.5A fuse ( 5x20mm, 250 V Fast)
Accuracy ± (% of r Amps) [1]
Range Full
Scale
5 ½ Digits
Resolution
24 hours
23
°
C
±
5
°
C
90 Days
23
°
C
±
5
°
C
One Year 23
°
C
±
5
°
C
3.3 mA
3.30000 mA
10
η
A
0.052 + 200
η
A
0.07 + 350
η
A
0.1 + 400
η
A
33 mA
33.0000 mA
100
η
A
0.04 + 1
µ
A
0.06 + 2
µ
A
0.1 + 3
µ
A
330 mA
330.000 mA
1
µ
A
0.05 + 30
µ
A
0.055 + 40
µ
A
0.075 + 60
µ
A
2.5 A
2.50000 A
10
µ
A
0.55 + 50
µ
A
0.6 + 200
µ
A
0.65 + 350
µ
A
[1] With reading rate set to 10 rps or slower, and within one hour of DCI zero, using Relative control.
2.3 AC Voltage Measurements
Input Characteristics
•
Input Resistance
1.0 M
Ω
, shunted by < 100 pF, all ranges
•
Crest Factor
3 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
2.3.1 AC Voltage True RMS Measurement
Range
Full Scale 6 ½ Digits
Lowest specified Voltage
Resolution
330 mV
330.0000 mV
5 mV [1]
100
η
V
3.3 V
3.300000 V
10 mV
1
µ
V
33 V
33.00000 V
100 mV
10
µ
V
250 V [2]
250.0000 V
1 V
100
µ
V
[1] Between 5 mV and 10 mV, add 100
µ
V additional error to the accuracy table below. In many
computer installations, if the DMM is not near a noisy board, usable voltage measurements of 1 mV
can be obtained.
[2] Signal is limited to 8x10
6
Volt Hz Product. For example, the largest frequency input at 250 V is
32 kHz, or 8x10
6
Volt x Hz.
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