Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com
Specifications are subject to change without notice.
SPEC-2636_2636 Rev. A / September 2007
Page 5 of 8
Model 2635/2636
System SourceMeter
®
Specifications
3. METER SPECIFICATIONS
VOLTAGE MEASUREMENT SPECIFICATIONS
Specifications Category
Specifications
RANGE DISPLAY
RESOLUTION
9
INPUT
IMPEDENCE
ACCURACY (1 Year)
23°C ± 5°C
± (% rdg. + volts)
200.00 mV
1 µV
> 10 G
ȍ
0.015% + 225 µV
2.00000 V
10 µV
> 10 G
ȍ
0.02% + 350 µV
20.0000 V
100 µV
> 10 G
ȍ
0.015% + 5 mV
Voltage Measurement
Accuracy
8,9
200.000 V
1 mV
> 10 G
ȍ
0.015% + 50 mV
Temperature
Coefficient
± (0.15 × accuracy specification)/°C
• For temperatures (0°–18°C & 28°–50°C)
CURRENT MEASUREMENT SPECIFICATIONS
9
Specifications Category
Specifications
RANGE DISPLAY
RESOLUTION
10
VOLTAGE
BURDEN
11
ACCURACY (1 Year)
23°C ± 5°C
± (% rdg. + amps)
100.00 pA
12,13
1 fA
< 1 mV
0.15% + 120 fA
1.00000
nA
12,14
10 fA
< 1 mV
0.15% + 240 fA
10.0000 nA
100 fA
< 1 mV
0.15% + 3 pA
100.000 nA
1 pA
< 1 mV
0.06% + 40 pA
1.00000 øA
10 pA
< 1 mV
0.025% + 400 pA
Current Measurement
Accuracy
10.0000 øA
100 pA
< 1 mV
0.025% +1.5 nA
8
Add 50µV to source accuracy specifications per volt of HI lead drop
9
De
-rate accuracy specifications for NPLC setting < 1 by increasing error term. Add appropriate % of range term using table below
NPLC Setting
200 mV
Range
2 V – 200 V
Ranges
100 nA Range
1 µA – 100 mA
Ranges
1 A – 1.5 A
Ranges
0.1
0.01%
0.01%
0.01%
0.01%
0.01%
0.01
0.08 %
0.07%
0.1 %
0.05%
0.05%
0.001
0.8 %
0.6 %
1
%
0.5 %
1.1 %
10
Applies when in single channel display mode.
11
Four-wire remote sense only.
12
10-NPLC, 11-Point Median Filter, < 200V range, measurements made within 1 hour after zeroing. 23°C ± 1°C
13
Under default specification conditions: ±(0.15% + 750 fA).
14
Under default specification conditions: ±(0.15% + 1 pA).
