Signametrics
12
2.3.4 Extended Resistance Measurements (SM2064)
Characteristics
•
Test Voltage
Adjustable between -10V and +10V in 5mV steps
Accuracy ± (% of r Amps) [1]
Range
Measurement range
Resol
ution
Current Limit [3]
90 Days
23
°
C
±
5
°
C
One Year 23
°
C
±
5
°
C
400k
Ω
1k
Ω
to 100M
Ω
10
Ω
25µA
0.2 +
50
Ω
0.33 + 9
0
Ω
4M
Ω
10k
Ω
to 1G
Ω
100
Ω
2.5µA
0.3 +
350
Ω
0.43
+
550
Ω
40M
Ω
100k
Ω
to 10G
Ω
1k
Ω
250nA
0.4 +
3k
Ω
0.55 + 4.5k
Ω
[1] With Aperture set to
≥
0.5 Sec, and within one hour from Zero (Relative control).
[2] Multiply “% of reading” by 1/Voltage Source for applied voltages below 1V
[3] Limit is reached when the test current exceeds the Current Limit, or it is below 0.04% of
this value.
2.4 AC Voltage Measurements
Input Characteristics
•
Input Resistance
1 M
Ω
, 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
2.4.1 AC Voltage True RMS Measurement
Range
Full Scale 7-½ Digits
Lowest specified Voltage
Resolution
240 mV
240.0000 mV
5 mV [1]
100
η
V
2.4 V
2.400000 V
10 mV
1
µ
V
24 V
24.00000 V
100 mV
10
µ
V
240 V
240.0000 V
1 V
100
µ
V
330 V
330.0000 V
2 V
100
µ
V
[1] Between 5 mV and 10 mV, add 100
µ
V additional errors to the accuracy table below.
[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.
