Keithley 2182, Service Manual, Page: 94 / 120

Keithley Instruments, Inc.
Cleveland, Ohio 44139
DRN.
CKD.
APP.
DATE
DATE
DATE
PART NUMBER
LTR REVISIONS APP. DATE
FORM 28777A-SBG
BRUNING 40-21 62198-SBG
SPECIFICATIONS
⌠
SPEC-2182A
A Released 29844 SZ 6/11/04
HW 6/11/04
SK 6/11/04
RKN 6/08/04
Rev A
Page 2 of 3
2182A Nanovoltmeter Specifications
Temperature (Thermocouples)
12
(DISPLAYED IN °C, °F, OR K. ACCURACY BASED ON ITS-90, EXCLUSIVE OF
THERMOCOUPLE ERRORS.)
TYPE RANGE RESOLUTION
ACCURACY
90 Day/1 Year 23°
±
5°C
Relative to Simulated
Reference Junction
J -200 to +760°C 0.001°C
±
0.2°C
K -200 to +1372°C 0.001°C
±
0.2°C
N -200 to +1300°C 0.001°C
±
0.2°C
T -200 to +400°C 0.001°C
±
0.2°C
E -200 to +1000°C 0.001°C
±
0.2°C
R 0 to +1768°C 0.1°C
±
0.2°C
S 0 to +1768°C 0.1°C
±
0.2°C
B +350 to +1820°C 0.1°C
±
0.2°C
OPERATING CHARACTERISTICS
13,14
60HZ (50HZ) OPERATION
FUNCTION DIGITS READINGS/s PLCs
DCV Channel 1, 7.5 3 (1.2) 5
Channel 2, 7.5
17,19
6 (1.7) 5
Thermocouple 6.5
18,19
18 (5.5) 1
6.5
18,19,20
45 (7.2) 1
5.5
17,19
80 20.9) 0.1
4.5
16,17,19
115 (28.0) 0.01
Channel 1/Channel 2, 7.5 1.5 (1.2) 5
(Ratio), 7.5
17,19
2.3 (1.7) 5
Delta with 24XX, 6.5
18
8.5 (5.5) 1
Scan 6.5
18,20
20 (7.2) 1
5.5
17
30 (20.9) 0.1
Delta with 622X
4.5
17
6.5
41 (28.0)
47 (40)
22
0.01
1
SYSTEM SPEEDS
13,15
RANGE CHANGE TIME
14
: <40 ms (<50 ms).
FUNCTION CHANGE TIME
14
: <45 ms (<55 ms).
AUTORANGE TIME
14
: <60 ms (<70 ms).
ASCII READING TO RS-232 (19.2K Baud): 40/s (40/s).
MAX. INTERNAL TRIGGER RATE
16
: 120/s (120/s).
MAX. EXTERNAL TRIGGER RATE
16
: 120/s (120/s).
MEASUREMENT CHARACTERISTICS
A-D LINEARITY: 0.8ppm of r 0.5ppm of range.
FRONT AUTOZERO OFF ERROR: 10mV – 10V: Add
±
(8ppm of r 500
µ
V) for <10 minutes and
±
1°C.
NOTE: Offset voltage error does not apply for Delta Mode.
AUTOZERO OFF ERROR
10mV: Add
±
(8ppm of r 100nV) for <10 minutes and
±
1°C.
100mV-100V: Add
±
(8ppm of r 10
µ
V) for <10 minutes and
±
1°C.
NOTE: Offset voltage error does not apply for Delta Mode.
INPUT IMPEDANCE
10mV-10V: >10G
Ω
, in parallel with <1.5nF. (Front Filter ON)
10mV-10V: >10G
Ω
, in parallel with <0.5nF. (Front Filter OFF)
100V: 10M
Ω±
1%
DC INPUT BIAS CURRENT: <60pA @ 23°C, -10V to 5V.
<120pA @ 23°C, 5 V to 10V.
COMMON MODE CURRENT: <50nA p-p at 50Hz or 60Hz.
INPUT PROTECTION: 150V peak to any terminal, 70V peak Channel 1 LO to
Channel 2 LO.
CHANNEL ISOLATION: >10G
Ω
.
EARTH ISOLATION: 350V peak, >10G
Ω
and <150pF any terminal to earth. Add
35pF/ft with Model 2107 Low Thermal Input Cable.