Keithley 2000, Calibration Manual

Page: 67 / 88

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