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DC OPERATING CHARACTERISTICS
FUNCTION
DIGITS
DCV (all ranges),
DCI (all ranges), and
2W Ohms (<10M range)
DC SYSTEM SPEEDS
2, 6
RANGE CHANGE
3
: 50 / s.
3
FUNCTION CHANGE
: 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: 400 / s.
DC GENERAL
LINEARITY OF 10VDC RANGE: ±(2ppm of reading + 1ppm of range).
DCV, Ω, TEMPERATURE, CONTINUITY, DIODE TEST INPUT PROTECTION: 1000V, all ranges.
MAXIMUM 4WΩ LEAD RESISTANCE: 10% of range per lead for 100Ω and 1kΩ ranges; 1kΩ per lead for all other ranges.
DC CURRENT INPUT PROTECTION: 3A, 250V fuse.
SHUNT RESISTOR: 0.1Ω for 3A, 1A and 100mA ranges. 10Ω for 10mA range.
CONTINUITY THRESHOLD: Adjustable 1Ω to 1000Ω.
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
10 PLC
5
1 PLC
50
0.1 PLC
500
0.01 PLC
2000
DC Notes
1. Add the following to ppm of range accuracy specification based on range:1V and 100V, 2ppm; 100mV, 15ppm; 100Ω, 15ppm; <1MΩ, 2ppm; 10mA and 1A, 2ppm;
100mA, 20ppm.
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 1kΩ unbalance in LO lead.
14. Relative to calibration accuracy.
15. Specifications are for 4-wire ohms or 2-wire ohms with REL function.
2
READINGS/s
6
1
⁄
2 3, 4
5
1
2 3, 7
6
⁄
30
6
1
⁄
2 3, 5
50
5
1
⁄
2 3, 5
270
5
1
⁄
2 5
500
5
1
⁄
2 5
1000
1
2 5
4
⁄
2000
RMS NOISE
DIGITS
10V RANGE
1
6
⁄
< 1.5 µV
2
6
1
⁄
< 4 µV
2
5
1
⁄
< 22 µV
2
4
1
⁄
< 150 µV
2
PLCs
8
10
1
1
0.1
0.1
0.04
0.01
NMRR
12
CMRR
13
60 dB
140 dB
60 dB
140 dB
—
80 dB
—
80 dB
Specifications
A-5
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