Keithley 2001 Repair Manual

A-6
AC VOLTS (cont’d)
SETTLING CHARACTERISTICS:
Normal Mode (rms, avg.) <300ms to 1% of step change
<450ms to 0.1% of step change
<500ms to 0.01% of step change
Low Frequency Mode (rms) <5s to 0.1% of final value
COMMON MODE REJECTION: For 1k
Ω imbalance in either lead: >60dB for line
frequency
± 0.1%.
MAXIMUM VOLT•Hz PRODUCT: 2 × 10
7
V•Hz (for inputs above 20V).
AUTORANGING: Autoranges up at 105% of range, down at 10% of range.
AC VOLTS NOTES
1. Specifications apply for sinewave input, AC + DC coupling, 1 power line cycle, digital filter off,
following 55 minute warm-up.
2. Temperature coefficient applies to rms or average readings. For frequencies above
100kHz, add 0.01% of reading/ ° C to temperature coefficient.
3. For 1% to 5% of range below 750V range, and for 1% to 7% of 750V range, add 0.01% to range
uncertainty. For inputs from 200kHz to 2MHz, specifications apply above 10% of range.
4. Add 0.001% of reading × (VIN/100V)
2
additional uncertainty above 100V rms.
5. Typical values.
6. For DELAY=0, digital filter off, display off (or display in “hold” mode). Internal Trigger,
Normal mode. See Operating Speed section for additional detail. Aperture is reciprocal of
line frequency. These rates are for 60Hz and (50Hz). Applies for rms and average mode.
Low frequency mode rate is typically 0.2 readings per second.
7. For overrange readings 200–300% of range, add 0.1% of reading. For 300–400% of range,
add 0.2% of reading.
8. In burst mode, display off. Burst mode requires Auto Zero refresh (by changing resolution
or measurement function) once every 24 hours.
9. AC peak specifications assume AC + DC coupling for frequencies below 200Hz.
10.Specifications apply for 10 reading digital filter. If no filter is used, add 0.25% of range
typical uncertainty.
11.Subject to peak input voltage specification.
OHMS
TWO-WIRE AND FOUR-WIRE OHMS (2W and 4W Ohms Functions)
TEMPERATURE
COEFFICIENT
MAXIMUM MAXIMUM
± (ppm of reading +
FULL DEFAULT CURRENT
1
OPEN LEAD OFFSET ppm of range)/ ° C
RANGE SCALE RESOLUTION RESOLUTION SOURCE CIRCUIT
12
RESISTANCE
2
COMPENSATION
3
Outside T CAL ± 5 °
20 Ω 21.000000 1 µΩ 10 µΩ 9.2 mA 5 V 1.7 Ω± 0.2 V 8 + 1.5
200
Ω 210.00000 10 µΩ 100 µΩ 0.98 mA 5 V 12 Ω± 0.2 V 4 + 1.5
2k
Ω 2100.0000 100 µΩ 1m Ω 0.98 mA 5 V 100 Ω –0.2 V to +2 V 2.5 + 0.2
20 k
Ω 21.000000 1 m Ω 10 m Ω 89 µ A 5 V 1.5 k Ω –0.2 V to +2 V 4 + 0.2
200 k
Ω 210.00000 10 m Ω 100 m Ω 7 µ A 5 V 1.5 k Ω 11 + 0.2
2M
Ω
4
2.1000000 100 m Ω 1 Ω 770 nA 5 V 1.5 k Ω 25 + 0.2
20 M
Ω
4
21.000000 1 Ω 10 Ω 70 nA 5 V 1.5 k Ω 250 + 0.2
200 M
Ω
4
210.00000 10 Ω 100 Ω 4.4 nA 5 V 1.5 k Ω 4000 + 10
1G
Ω
4
1.0500000 100 Ω 1k Ω 4.4 nA 5 V 1.5 k Ω 4000 + 10
2-WIRE ACCURACY
7
± (ppm of range)
RANGE 20
Ω 200 Ω 2 k Ω
ADDITIONAL UNCERTAINTY
(inside T
CAL ± 5 ° C) 300 ppm 30 ppm 3 ppm
TEMPERATURE COEFFICIENT
(outside T
CAL ± 5 ° C) 70ppm/ ° C 7ppm/ ° C 0.7ppm/ ° C
RESISTANCE ACCURACY
5
± (ppm of reading + ppm of range)
RANGE 24 Hours
6
90 Days
7
1 Year
7
2 Years
7
20 Ω 29 + 7 52 + 7 72 + 7 110 + 7
200
Ω 24 + 7 36 + 7 56 + 7 90 + 7
2k
Ω 22 + 4 33 + 4 50 + 4 80 + 4.5
20 k
Ω 19 + 4 32 + 4 50 + 4 80 + 4.5
200 k
Ω 20 + 4.5 72 + 4.5 90 + 4.5 130 + 5
2M
Ω
4
50 + 4.5 110 + 4.5 160 + 4.5 230 + 5
20 M
Ω
4
160 + 4.5 560 + 4.5 900 + 4.5 1100 + 5
200 M
Ω
4
3000 + 100 10000 +100 20000 + 100 30000 + 100
1G
Ω
4
9000 + 100 20000 +100 40000 + 100 60000 + 100
RESISTANCE UNCERTAINTY =
± [ (ppm of reading) × (measured value) + (ppm
of range) × (range used) ] / 1,000,000.
% ACCURACY = (ppm accuracy) / 10,000.
1PPM OF RANGE = 2 counts for ranges up to 200M
Ω and 1 count on 1G Ω range
at 6
1
⁄ 2 digits.
SPEED AND ACCURACY
9
90 Days
ACCURACY
± (ppm of reading+ppm of range+ppm of range rms noise
12
)
1PLC 0.1PLC
11
0.01PLC
8,11
RANGE DFILT Off DFILT Off DFILT Off
20
Ω 52+ 7+0.6 52+ 30+10 110+200+ 35
200
Ω 36+ 7+0.6 36+ 30+10 110+200+ 35
2k
Ω 33+ 4+0.2 33+ 24+ 1 130+230+ 5
20 k
Ω 32+ 4+0.2 32+ 24+ 2 130+230+ 5
200 k
Ω 72+ 4.5+0.5 72+ 25+ 4 150+300+ 10
2M
Ω
4
110+ 4.5+ 2 110+ 25+15 150+300+150
20 M
Ω
4
560+ 4.5+ 5 560+ 30+20 560+300+150
200 M
Ω
4
10,000+100+ 40 10,000+120+80 10,000+700+250
1G
Ω
4
20,000+100+ 40 20,000+120+80 20,000+700+250
PLC = Power Line Cycles. DFILT = Digital Filter.
SETTLING CHARACTERISTICS: For first reading following step change, add the
total 90-day measurement error for the present range. Pre-programmed
settling delay times are for <200pF external circuit capacitance. For 200M
Ω
and 1G Ω ranges, add total 1 year errors for first reading following step
change. Reading settling times are affected by source impedance and cable
dielectric absorption characteristics.
OHMS MEASUREMENT METHOD: Constant current.
OFFSET COMPENSATION: Available on 20
Ω – 20k Ω ranges.
OHMS VOLTAGE DROP MEASUREMENT: Available as a multiple display.
AUTORANGING: Autoranges up at 105% of range, down at 10% of range.

Keithley 2001 Specifications

General

Model	2001
Category	Multimeter
Manufacturer	Keithley
Type	Digital Multimeter
Digits of Resolution	7.5
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Connectivity	GPIB, RS-232
Display	VFD
Resistance Accuracy	0.008% + 2.0 mΩ
Frequency Accuracy	±0.01%
DC Current Range	10 μA to 3 A
AC Current Range	10 μA to 3 A
Power Supply	100 V to 240 V AC, 45 Hz to 66 Hz