A-3
DC VOLTS
DCV INPUT CHARACTERISTICS AND ACCURACY
DEFAULT ACCURACY
1
TEMPERATURE COEFFICIENT
FULL RESO- RESO- INPUT
±
(ppm of reading + ppm of range)
±
(ppm of reading + ppm of range)/
°
C
RANGE SCALE LUTION LUTION RESISTANCE 5 Minutes
12
24 Hours
2
90 Days
3
1 Year
3
2 Years
3
Outside T
CAL
±
5
°
C
200mV
4
±
210.00000 10 nV 100 nV >10 G
Ω
3 + 3 10 + 6 25 + 6 37 + 6 50 + 6 3.3 +1.5
2V
±
2.1000000 100 nV 1
µ
V >10 G
Ω
2 + 1.5 7 + 2 18 + 2 25 + 2 32 + 2 2.6 +0.15
20 V
±
21.000000 1
µ
V 10
µ
V >10 G
Ω
2 + 1.5 7 + 4 18 + 4 24 + 4 32 + 4 2.6 +0.7
200 V
±
210.00000 10
µ
V 100
µ
V 10 M
Ω±
1% 2 + 1.5 13 + 3 27 + 3 38 + 3 52 + 3 4.3 +1
1000 V
±
1100.0000 100
µ
V 1 mV 10 M
Ω±
1% 10 + 1.5 17 + 6 31 + 6 41 + 6 55 + 6 4.1 +1
DC VOLTAGE UNCERTAINTY =
±
[ (ppm of reading) × (measured value) + (ppm of range) × (range used)] / 1,000,000.
% ACCURACY = (ppm accuracy) /10,000.
1PPM OF RANGE = 2 counts for ranges up to 200V, 1 count on 1000V range at 6
1
⁄
2
digits.
SPEED AND ACCURACY
5
90 Days
ACCURACY
±
(ppm of reading+ppm of range+ppm of range rms noise
10
)
1PLC
DFILT On, 1PLC 0.1PLC 0.01PLC
11
RANGE 10 Readings DFILT Off DFILT Off DFILT Off
200 mV
4
25+6+0 25+6+0.6 25+30+10 100+200+15
2 V 18+2+0 18+2+0.2 18+25+1 130+200+3
20 V 18+4+0 18+4+0.3 18+20+0.5 130+200+3
200 V 27+3+0 27+5+0.3 27+20+0.8 130+200+3
1000 V 31+6+0 31+6+0.1 31+21+0.5 90+200+2
PLC = power line cycle; DFILT = digital filter
NOISE REJECTION (dB)
SPEED AC and DC CMRR
6
AC NMRR
(Number of Line Sync On
7
Line Sync Internal
Power Line Line Sync Internal 25-Reading On
7
Trigger
8
Cycles) On
7
Trigger
8
DFILT On DFILT Off DFILT Off
NPLC = 10 140 120 90 80 60
NPLC
≥
1 140 120 90 80 60
NPLC < 1 60 50 30 20 0
Effective noise is reduced by a factor of 10 for every 20dB of noise rejection (140dB
reduces effective noise by 10,000,000:1).
CMRR is rejection of undesirable AC or DC signal between LO and earth. NMRR
is rejection of undesirable AC signal between HI and LO.
DCV READING RATES
9,10
200mV, 2V, 200V Ranges
READINGS/SECOND WITH
MEASUREMENT DEFAULT READINGS/SECOND TO MEMORY READINGS/SECOND TO IEEE-488 TIME STAMP TO IEEE-488
NPLC APERTURE BITS DIGITS Auto Zero Off Auto Zero On Auto Zero Off Auto Zero On Auto Zero Off Auto Zero On
10 167 ms (200 ms) 28 7
1
⁄
2
6 (5.1) 2 (1.7) 6 2 (1.6) 6 (4.1) 2 (1.6)
2 33.4 ms (40 ms) 26 7
1
⁄
2
30 (25) 9 (7.6) 28 (23) 9 (7.3) 27 (22) 8 (7.2)
1 16.7 ms (20 ms) 25 6
1
⁄
2
58 (48) 44 (34) 54 (45) 41 (32) 49 (41) 37 (30)
0.2 3.34 ms (4 ms) 22 6
1
⁄
2
214 (186) 127 (112) 183 (162) 104 (101) 140 (126) 88 (85)
0.1 1.67 ms (2 ms) 21 5
1
⁄
2
272 (272) 150 (148) 228 (225) 129 (123) 156 (153) 100 (96)
0.02 334
µ
s (400
µ
s) 19 5
1
⁄
2
284 (287) 156 (155) 230 (230) 136 (134) 158 (156) 104 (103)
0.01 167
µ
s (167
µ
s) 16 4
1
⁄
2
417 (417) 157 (157) 317 (317) 137 (134) 198 (198) 105 (103)
0.01
11
167
µ
s (167
µ
s) 16 4
1
⁄
2
2000 (2000) 2000 (2000)
20V, 1000V Ranges
10 167 ms (200 ms) 28 7
1
⁄
2
6 (5.1) 2 (1.7) 6 2 (1.6) 6 2 (1.6)
2 33.4 ms (40 ms) 26 7
1
⁄
2
30 (25) 9 (8.2) 28 (23) 9 (7.8) 27 (22) 9 (7.7)
1 16.7 ms (20 ms) 25 6
1
⁄
2
57 (48) 42 (38) 54 (45) 43 (35) 48 (41) 39 (32)
0.2 3.34 ms (4 ms) 22 6
1
⁄
2
201 (186) 102 (113) 173 (162) 102 (99) 129 (127) 84 (83)
0.1 1.67 ms (2 ms) 21 5
1
⁄
2
201 (201) 126 (116) 175 (173) 105 (105) 129 (128) 86 (86)
0.02 334
µ
s (400
µ
s) 19 5
1
⁄
2
227 (227) 129 (129) 178 (178) 114 (114) 138 (138) 90 (90)
0.01 167
µ
s (167
µ
s) 16 4
1
⁄
2
422 (422) 130 (130) 333 (333) 117 (117) 199 (199) 95 (95)
0.01
11
167
µ
s (167
µ
s) 16 4
1
⁄
2
2000 (2000) 2000 (2000)
SETTLING CHARACTERISTICS: <500
µ
s to 10ppm of step size. Reading settling
times are affected by source impedance and cable dielectric absorption
characteristics. Add 10ppm of range for first reading after range change.
ZERO STABILITY: Typical variation in zero reading, 1 hour, T
REF
±
1
°
C, 6
1
⁄
2
-digit
default resolution, 10-reading digital filter:
ZERO STABILITY
Range 1 Power Line Cycle Integration 10 Power Line Cycle Integration
2V – 1000V
±
3 counts
±
2 counts
200 mV
±
5 counts
±
3 counts
ISOLATED POLARITY REVERSAL ERROR: This is the portion of the instrument
error that is seen when high and low are reversed when driven by an isolated
source. This is not an additional error—it is included in the overall instrument
accuracy spec. Reversal Error: <2 counts at 10V input at 6
1
⁄
2
digits, 10 power
line cycles, 10-reading digital filter.
INPUT BIAS CURRENT: <100pA at 25
°
C.
LINEARITY: <1ppm of range typical, <2ppm maximum.
AUTORANGING: Autoranges up at 105% of range, down at 10% of range.
DC VOLTS NOTES
1. Specifications are for 1 power line cycle, Auto Zero on, 10-reading digital filter, except as
noted.
2. For TCAL
±
1
°
C, following 55-minute warm-up. TCAL is ambient temperature at calibration,
which is 23
°
C from factory.
3. For TCAL
±
5
°
C, following 55-minute warm-up. Specifications include factory traceability to
US NIST.
4. When properly zeroed using REL function.
5. For TCAL
±
5
°
C, 90-day accuracy. 1-year or 2-year accuracy can be found by applying the
same speed accuracy ppm changes to the 1-year or 2-year base accuracy.
6. Applies for 1k
Ω
imbalance in the LO lead. For 400Hz operation, subtract 10dB.
7. For noise synchronous to the line frequency.
8. For line frequency
±
0.1%.
9. See Operating Speed section for additional detail. For DELAY=0, internal trigger, digital
filter off, display off (or display in “hold” mode). Aperture is reciprocal of line frequency.
These rates are for 60Hz and (50Hz).
10.Typical values.
11.In burst mode, display off. Burst mode requires Auto Zero refresh (by changing
resolution or measurement function) once every 24 hours.
12.DCV Transfer Stability typical applications are standard cell comparisons and
relative accuracy measurements. Specs apply for 10 power line cycles, 20-
reading digital filter, autozero on with type synchronous, fixed range following
2-hour warm-up at full scale to 10% of full scale, at TREF
±
1
°
C (TREF is the initial
ambient temperature). Specifications on the 1000V range are for measurements
within 5% of the initial measurement value and following measurement settling.
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