Operator`s manual

Signametrics 12
2.3.4 Extended Resistance Measurements (SM2064)
Characteristics
• Test Voltage Adjustable between -10V and +10V in 5mV steps
Accuracy ± (% of reading + Amps) [1]
Range
Measurement range
Resol
ution
Current Limit [3] 90 Days
23°C ± 5°C
One Year 23°C
± 5°C
400kΩ 1kΩ to 100MΩ 10Ω
25µA
0.2 +
50Ω 0.33 + 9 0Ω
4MΩ 10kΩ to 1GΩ 100Ω
2.5µA
0.3 +
350Ω 0.43 + 550Ω
40MΩ 100kΩ to 10GΩ 1kΩ
250nA
0.4 +
3kΩ 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 MΩ, 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 ηV
2.4 V 2.400000 V 10 mV
1 µV
24 V 24.00000 V 100 mV
10 µV
240 V 240.0000 V 1 V
100 µV
330 V
330.0000 V 2 V
100 µV
[1] Between 5 mV and 10 mV, add 100 µV 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.