Keithley 2790 - Page 119

HW 11/04/03
Rev. D
2790 SourceMeter

Switch System Specifications
MAINFRAME FUNCTION SPECIFICATION
AC MEASUREMENT SPECIFICATIONS
1
All Ranges
Accuracy: ±(% of reading + % of range), 23°C ±5 °C
Function Range Resolution
All Ranges
Calibration Cycle
3 Hz-
10 Hz
13
10 Hz-
20 kHz
20 kHz-
50 kHz
50 kHz-
100 kHz
100 kHz-
300 kHz
Voltage
2
100.0000 mV 0.1 µV 90 Days 0.35 + 0.03 0.05 + 0.03 0.11 + 0.05 0.6 + 0.08 4.0 + 0.5
1.000000 V 1.0 µV
10.00000 V 10 µV 1 Year 0.35 + 0.03 0.06 + 0.03 0.12 + 0.05 0.6 + 0.08 4.0 + 0.5
100.0000 V 100 µV
750.000 V 1.0 µV
(Temp. Coeff.)/°C
3
0.035 + 0.003 0.005 + 0.003 0.006 + 0.005 0.01 + 0.006 0.03 + 0.01
3 Hz-10 Hz 10 Hz-3 kHz 3 kHz – 5 kHz
Current
2
1.000000 A 1.0 µA 90 Day/1 Year 0.30 + 0.04 0.10 + 0.04 0.14 + 0.04
3.00000
14
A 10 µA 0.35 + 0.06 0.15 + 0.06 0.18 + 0.06
(Temp. Coeff.)/°C
3
0.035 + 0.006 0.015 + 0.006 0.015 + 0.006
(3 Hz-500 kHz) (333 ms-2 µs)
100 mV 0.333 ppm 90 Day/1 Year 80 ppm + 0.333 ppm (SLOW, 1s gate)
Frequency
4
and Period
to 3.33 ppm 80 ppm + 3.33 ppm (MED, 100ms gate)
750 V 33.3 ppm 80 ppm + 33.3 ppm (FAST, 10ms gate)
Additional Uncertainty ±(% of reading)
Low Frequency Uncertainty MED FAST
20Hz - 30Hz 0.3 —
30Hz - 50Hz 0 —
50Hz - 100Hz 0 1.0
100Hz - 200Hz 0 0.18
200Hz - 300Hz 0 0.10
> 300Hz 0 0
CREST FACTOR
5
: 1–2 2–3 3–4
Additional Uncertainty: 0.05 0.15 0.30
AC MEASUREMENT CHARACTERISTICS
AC Volts
MEASUREMENT METHOD: AC-coupled, True RMS.
INPUT IMPEDANCE: 1MΩ ±2% // by <100pF.
INPUT PROTECTION: 1000Vp or 400VDC
, 300Vrms with 7702
module.
AC Current
MEASUREMENT METHOD: AC-coupled, True RMS.
SHUNT RESISTANCE: 0.1Ω.
BURDEN VOLTAGE: 1A <0.3Vrms, 3A <1Vrms. Add 1Vrms when
used with 7702 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
7
.
AC OPERATING CHARACTERISTICS
7
60Hz (50Hz) Operation
Function Digits Readings/s Rate Bandwidth
6.5
8
2s/Reading SLOW 3 Hz-300kHz
6.5
8
1.4 (1.1) MED 30 Hz-300kHz
6.5
9
4.8 (4) MED 30 Hz-300kHz
ACV, ACI
6.5
9
35 (28) FAST 300 Hz-300kHz
6.5 1 (1) SLOW 3 Hz-300kHz
5.5 9 (9) MED 30 Hz-300kHz
4.5 35 (35) FAST 300 Hz-300kHz
Frequency,
Period
4.5
10
65 (65) FAST 300 Hz-300kHz