Keithley 2002, Calibration Manual, Page: 79 / 114

A-10 Specifications
AC Amps
ACI Input Characteristics
Temperature
Maximum Coefficient
rms Peak Full Scale Burden
±
(% of r % of range)/
°
C
Range Input rms Resolution Voltage 5 Outside T
CAL
±
5
°
C
200
µ
A 1 mA 210.0000 100 pA 0.35 V 0.01 + 0.001
2 mA 10 mA 2.100000 1 nA 0.45 V 0.01 + 0.001
20 mA 100 mA 21.00000 10 nA 0.5 V 0.01 + 0.001
200 mA 1 A 210.0000 100 nA 0.5 V 0.01 + 0.001
2 A 2 A 2.100000 1
µ
A 1.5 V 0.01 + 0.001
ACI Accuracy 1,2
90 Days, 1 Year or 2 Years, T
CAL
±
5
°
C, for 5% to 100% of range,
±
(% of r % of range)
Range 20Hz–50Hz 50Hz–200Hz 200Hz–1kHz 1kHz–10kHz 10kHz–30kHz 3 30kHz–50kHz 3 50kHz–100kHz 3
200
µ
A 0.35 + 0.015 0.2 + 0.015 0.4 + 0.015 0.5 + 0.015
2 mA 0.3 + 0.015 0.15 + 0.015 0.12 + 0.015 0.12 + 0.015 0.25 + 0.015 0.3 + 0.015 0.5 + 0.015
20 mA 0.3 + 0.015 0.15 + 0.015 0.12 + 0.015 0.12 + 0.015 0.25 + 0.015 0.3 + 0.015 0.5 + 0.015
200 mA 0.3 + 0.015 0.15 + 0.015 0.12 + 0.015 0.15 + 0.015 0.5 + 0.015 1 + 0.015 3 + 0.015
2 A 0.35 + 0.015 0.2 + 0.015 0.3 + 0.015 0.45 + 0.015 1.5 + 0.015 4 + 0.015
AC Current Uncertainty =
±
[ (% of reading)
×
(measured value) + (% of range)
×
(range used) ] / 100.
ppm Accuracy = (% accuracy)
×
10,000.
0.015% of Range = 30 counts at 5
½
digits.
AC magnitude: rms or Average.
AC Coupling
For AC only coupling, add the following % of reading:
20–50Hz 50–100Hz 100–200Hz
rms, Average 0.55 0.09 0.015
AC+DC Coupling
For DC>20% of AC rms voltage, apply the following additional
uncertainty, multiplied by the ratio (DC/total rms).
% of Reading % of Range
rms, Average 0.05 0.1
High Crest Factor Additional Error
±
(% of reading)
Applies to rms measurements.
Crest Factor 1 – 2 2 – 3 3 – 4 4 – 5
Additional Error 0 0.1 0.2 0.4
Average ACI Measurement
rms specifications apply for 10% to 100% of range.
Settling Characteristics <300ms to 1% of step change
<450ms to 0.1% of step change
<500ms to 0.01% of step change
Autoranging Autoranges up at 105% of range,
down at 10% of range.
AC Amps Notes
1 Specifications apply for sinewave input, AC+DC coupling, 1
power line cycle, autozero on, digital filter off, following 55-
minute warm-up.
2 Add 0.005% of range uncertainty for current above 0.5A
rms for self-heating.
3 Typical values.
4 For on-scale readings, no trigger delays, digital filter off,
normal autozero, display off, internal trigger, SREAL
format. These rates are for 60Hz and (50Hz). Rates for
400Hz equal those for 50Hz.
5 Actual maximum burden voltage = (maximum burden
voltage)
×
(I
MEASURED
/I
FULL SCALE
).
6 In burst mode, display off. Burst mode requires autozero
refresh (by changing resolution or measurement function)
once every 24 hours.
7 Using Internal Buffer.
ACI Reading Rates 3,4
Readings/Second with
Measurement Default Readings/Second to Memory Readings/Second to IEEE-488 7 Time Stamp to IEEE-488 7
PLC Aperture Bits Digits Autozero Off Autozero On Autozero Off Autozero On Autozero Off Autozero On
10 167 ms (200 ms) 29 6 1 ⁄
2
6 ( 5 ) 2 (1.7) 6 ( 5 ) 2 (1.6) 6 ( 5 ) 2 (1.6)
2 33.4 ms (40 ms) 27 5 1 ⁄
2
29 (25) 9 (7.6) 28 (23) 9 (7.4) 27 (22) 9 (7.4)
1 16.7 ms (20 ms) 26 5 1 ⁄
2
56 (48) 47 (40) 53 (43) 44 (36) 47 (38) 40 (33)
0.2 3.34 ms (4 ms) 23 5 1 ⁄
2
163 (145) 102 (91) 139 (124) 100 (89) 95 (84) 74 (66)
0.1 1.67 ms (2 ms) 22 5 1 ⁄
2
163 (156) 104 (100) 139 (133) 101 (97) 95 (91) 75 (72)
0.02 334
µ
s (400
µ
s) 20 5 1 ⁄
2
163 (163) 107 (107) 139 (139) 103 (103) 95 (95) 76 (76)
0.01 167
µ
s (167
µ
s) 19 4 1 ⁄
2
384 (384) 110 (110) 253 (253) 103 (103) 164 (164) 76 (76)
0.01
6
167
µ
s (167
µ
s) 19 4 1 ⁄
2
2000 (2000) 2000 (2000)