Keithley SourceMeter 2400, Service Manual, Page: 102 / 137

SPECIFICATIONS
SPEC-2425
A 24053 Released SZ 4/18/00
B 23093 Revised SZ 4/28/00
C 27953 Revised SZ 3/20/03
SJ 4/18/00
CC 4/18/00
HW 3/20/03
Rev. C
Page 2 of 3
2425 and 2425-C SourceMeter
®
Specifications
MEASURE SPECIFICATIONS
1,2
VOLTAGE MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE)
RANGE
DEFAULT
RESOLUTION INPUT RESISTANCE
ACCURACY (1 Year)
23°C
±
5°C
±
(% rdg. + volts)
200.00 mV 1 µV >10 G
Ω
0.012% + 300 µV
2.00000 V 10 µV
>10 G
Ω
0.012% + 300 µV
20.0000 V 100 µV
>10 G
Ω 0.015% + 1 mV
100.000 V 1 mV
>10 G
Ω 0.015% + 5 mV
TEMPERATURE COEFFICIENT (0°-18°C & 28°-50°C):
±
(0.15 × accuracy specification)/ °C.
CURRENT MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE)
RANGE
DEFAULT
RESOLUTION
VOLTAGE BURDEN
3
ACCURACY (1 Year)
23°C
±
5°C
±
(% rdg. + amps)
10.0000 µA 100 pA <1 mV 0.027% + 700 pA
100.000 µA 1 nA <1 mV 0.025% + 6 nA
1.00000 mA 10 nA <1 mV 0.027% + 60 nA
10.0000 mA 100 nA <1 mV 0.035% + 600 nA
100.000 mA 1 µA <1 mV 0.055% + 6 µA
1.00000 A 10 µA <1 mV 0.060% + 570 µA
3.00000 A 10 µA <1 mV 0.052% + 1.71 mA
TEMPERATURE COEFFICIENT (0°-18°C & 28°-50°C):
±
(0.10 × accuracy specification)/ °C.
CONTACT CHECK
SPECIFICATIONS
SPEED: 350µs for verification and notification.
CONTACT CHECK: 2
Ω
15
Ω
50
Ω
No contact check
failure
<1.00
Ω
<13.5
Ω
<47.5
Ω
Always contact check
failure >3.00
Ω
>16.5
Ω
>52.5
Ω
RESISTANCE MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE)
RANGE DEFAULT RESOLUTION DEFAULT TEST CURRENT
NORMAL ACCURACY (23°C
±
5°C)
1 YEAR, ±
(% rdg. + ohms)
<0.20000
Ω 4 - - Source I
ACC
+ Meas. V
ACC
2.00000
Ω
10 µ
Ω 1 A
0.17% + 0.0003
Ω
20.0000
Ω
100 µ
Ω
100 mA
0.10% + 0.003
Ω
200.000
Ω
1 m
Ω
10 mA 0.08% + 0.03
Ω
2.00000 k
Ω
10 m
Ω 1 mA
0.07% + 0.3
Ω
20.0000 k
Ω
100 m
Ω 100
µA 0.06% + 3
Ω
200.000 k
Ω
1
Ω 10
µA 0.07% + 30
Ω
2.00000 M
Ω
10
Ω 10
µA 0.11% + 300
Ω
20.0000 M
Ω
100
Ω 1
µA 0.11% + 1 k
Ω
>20.0000 M
Ω
4
- - Source I
ACC
+ Meas. V
ACC
TEMPERATURE COEFFICIENT (0°-18°C & 28°-50°C): ± (0.15 × accuracy
specification)/ °C.
SOURCE I MODE, MANUAL OHMS: Total uncertainty = I source accuracy
+ V measure accuracy (4-wire remote sense).
SOURCE V MODE, MANUAL OHMS: Total uncertainty = V source
ac I measure accuracy (4-wire remote sense).
6-WIRE OHMS MODE: Available using active ohms guard and guard sense
(except on 1A and 3A ranges). Max. Guard Output Current: 50mA. Accuracy
is load dependent. Refer to White Paper no. 2033 for calculation formula.
GUARD OUTPUT IMPEDANCE: <0.1
Ω
in ohms mode.
1. Speed = Normal (1 PLC). For 0.1 PLC, add 0.005% of range to offset specifications,
except 200mV, 1A, 3A ranges, add 0.05%. For 0.01 PLC, add 0.05% of range to offset
specifications, except 200mV, 1A, 3A ranges, add 0.5%.
2. Accuracies apply to 2- or 4-wire mode when properly zeroed.
3. 4-wire mode.
4. Manual ohms only.