Keithley 2000 User Manual page 217

2000 6½-Digit Multimeter Specifications
DC Operating Characteristics
Function Digits
3, 4
DCV (all ranges), 6½
3, 7
DCI (all ranges), 6½
3, 5
and Ohms 6½
3, 5
(<10M range) 5½
5
5½
5
5½
5
4½
2, 6
DC System Speeds
3
: 50/s.
RANGE CHANGE
3
: 45/s.
FUNCTION CHANGE
3, 10
: <30 ms.
AUTORANGE TIME
ASCII READINGS TO RS-232 (19.2k BAUD): 55/s.
MAX. INTERNAL TRIGGER RATE: 2000/s.
MAX. EXTERNAL TRIGGER RATE: 500/s.
DC General
LINEARITY OF 10VDC RANGE: ±(2ppm of reading + 1ppm of
range).
DCV, , TEMPERATURE, CONTINUITY, DIODE TEST
INPUT PROTECTION: 1000V, all ranges.
MAXIMUM 4W LEAD RESISTANCE: 10% of range per lead
for 100 and 1k ranges; 1k per lead for all other ranges.
DC CURRENT INPUT PROTECTION: 3A, 250V fuse.
SHUNT RESISTOR: 0.1 for 3A, 1A and 100mA ranges. 10 for
10mA range.
CONTINUITY THRESHOLD: Adjustable 1 to 1000 .
AUTOZERO OFF ERROR: Add ±(2ppm of range error + 5µV)
for <10 minutes and ±1°C change.
OVERRANGE: 120% of range except on 1000V, 3A and Diode.
2
Speed and Noise Rejection
8
Readings/s PLCs
5 10
30 1
50 1
270 0.1
0.01 PCL
500 0.1
1000 0.04
2000 0.01
DC Notes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
RMS Noise
Rate Readings/s Digits 10V Range
10 PCL 5 6½ < 1.5 µV
1 PCL 50 6½
0.1 PCL 500 5½
2000 4½ < 150 µV
Add the following to "ppm of range" uncertainty:1V and 100V,
2ppm; 100mV, 15ppm; 100 , 15ppm; <1M , 2ppm; 10mA and
1A, 10ppm; 100mA, 40ppm.
Speeds are for 60 Hz operation using factory default operating
conditions (*RST). Autorange off, Display off, Trigger delay = 0.
Speeds include measurement and binary data transfer out the
GPIB.
Auto zero off.
Sample count = 1024, auto zero off.
Auto zero off, NPLC = 0.01.
Ohms = 24 readings/second.
1 PLC = 16.67ms @ 60Hz, 20ms @ 50Hz/400Hz. The frequency
is automatically determined at power up.
For signal levels >500V, add 0.02ppm/V uncertainty for the
portion exceeding 500V.
Add 120ms for ohms.
Must have 10% matching of lead resistance in Input HI and LO.
For line frequency ±0.1%.
For 1k unbalance in LO lead.
Relative to calibration accuracy.
Specifications are for 4-wire ohms. For 2-wire ohms, add 1
additional uncertainty.
For rear inputs, add the following to Temperature Coefficient
"ppm of reading" uncertainty: 10M 70ppm, 100M 385ppm.
Operating environment specified for 0° to 50°C and 50% RH at
35°C.
12 13
NMRR CMRR
60 dB 140 dB
< 4 µV 60 dB 140 dB
< 22 µV – 80 dB
– 80 dB
JMM 8/8/01
Rev. E