Keithley 2182 Service Manual page 94

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