Ac Current - Keithley 2700 Service Manual

AC SPECIFICATIONS
Function Range Resolution
Voltage 2 100.0000 mV
1.000000 V
10.00000 V
100.0000 V
750.000 V
Current 2 1.000000 A
3.00000 A
Frequency 4 100 mV 0.333 ppm
and Period to 3.33 ppm
750 V 33.3 ppm
Additional Uncertainty ±(% of reading)
Low Frequency Uncertainty
20 Hz - 30 Hz
30 Hz - 50 Hz
50 Hz - 100 Hz
100 Hz - 200 Hz
200 Hz - 300 Hz
>300 Hz
CREST FACTOR: 5 1 -2
Additional Uncertainty: 0.05
AC MEASUREMENT CHARACTERISTICS
AC Volts
MEASUREMENT METHOD: AC-coupled, True RMS.
INPUT IMPEDANCE: 1MΩ ±2% // by <100pF.
INPUT PROTECTION: 1000Vp or 400VDC. 300Vrms with plug in modules.

AC Current

MEASUREMENT METHOD: AC-coupled, True RMS.
SHUNT RESISTANCE: 0.1Ω.
BURDEN VOLTAGE: 1A <0.3Vrms, 3A <1Vrms. Add 1Vrms when used with plug in modules.
INPUT PROTECTION: 3A, 250V fuse.
Frequency and Period
MEASUREMENT METHOD: Reciprocal Counting technique.
GATE TIME: SLOW 1s, MED 100ms, and FAST 10ms.
AC General
AC CMRR 6 : 70dB.
MAXIMUM CREST FACTOR: 5 at full-scale.
VOLT HERTZ PRODUCT: <= 8 × 10
1
Calibration 3 Hz–
Cycle 10 Hz
0.1 µV 90 Days 0.35 + 0.03
1.0 µV
10 µV 1 Year 0.35 + 0.03
100 µV
1.0 µV (Temp. Coeff.)/°C 3 0.035 + .003
3 Hz–10 Hz
1.0 µA 90 Day/1 Yr. 0.30 + 0.04
10 µA 0.35 + 0.06
(Temp. Coeff.)/°C 3 0.035 + 0.006
(3 Hz–500 kHz) (333 ms–2 µs)
90 Day/ 1 Yr. 100 ppm + 0.333 ppm (SLOW, 1s gate)
100 ppm + 3.33 ppm (MED, 100ms gate)
100 ppm + 33.3 ppm (FAST, 10ms gate)
MED FAST
0.3 —
0 —
0 1.0
0 0.18
0 0.10
0 0
2 - 3 3 - 4 4 - 5
0.15 0.30 0.40
7 .
Accuracy: ±(% of reading + % of range), 23°C ± 5°C
10 Hz– 20 kHz–
20 kHz 50 kHz
0.05 + 0.03 0.11 + 0.05
0.06 + 0.03 0.12 + 0.05
0.005 + .003 0.006 + .005
10 Hz–5 kHz
0.10 + 0.04
0.15 + 0.06
0.015 + 0.006
Specifications A-5
50 kHz– 100 kHz–
100 kHz 300 kHz
0.6 + 0.08 4.0 + 0.5
0.6 + 0.08 4.0 + 0.5
0.01 + .006 0.03 + .01