HP 3457A Service Manual page 21

General Information B457A
Table 1-1. Specifications
TRUE RMS AC VOLTAGE (Cont'd)
TEMPERATURE COEFFICIENT - AC COUPLED: All Ranges.
FREQUENCY PERCENT NUMBER OF COUNTS
READING |6 1/2 digits |5 1/2 digits|4 1/2 digits|3 1/2 digits
* 20Hz-100Kiiz| 0.07 150 15 1.5 0.15
1OOKH2- IMH2z 0.08 300 30 3 0.3
* For AC inputs between 3% and 10% of full-scale and < 20KHz, add .04% to percent reading.
MEASUREMENT ACCURACY - DC COUPLED: +(% of reading + number of counts)
Accuracy specified for sine-wave inputs > 10% of range with DC component < 10% of the AC com-
ponent from a source impedance of <10 KOhms, with Auto-zero ON, AC slow filter ON (ACBAND 20),
and after 2 hr warm-up. For DC component >10% of the AC component, allow an additional 1.5 sec.
ttling time for correct first reading, add .14% to the applicable percent of reading fig
ures, add 23000 to the 6 1/2 digit counts, add 2300 to the 5 1/2 digit counts, add 230 to the
4 1/2 digit counts, add 23 to the 3 1/2 digit counts.
For pre-programmed settling times, add .1% of input voltage step to accuracy specificatio
for the first reading.
HOUR: Tcal + 1°C (ACDCV Function) After 2 hour warm-up Accuracy relative to calibration std
30 mv to 30 V ranges
FREQUENCY PERCENT NUMBER OF COUNTS
OF >= 1 PLO 0.1 PLC +005 PLC -0005 PLC
READING |6 1/2 digits|5 1/2 digits]4 1/2 digits|3 1/2 digits
20Hz-45H2 : 1500 154 20 6
45Hz- 100Hz % 1500 154 20 6
100Hz-20KHz "i 1500 154 20 6
** GOOHZ-20KHz2 . 1500 2600 31
20KHz- 100KHz . 2520 256 30 r
VOOKHz-300KHz . 9300 934 98 14
BOOKHz> IMHz . 67500 6750 680 72
24 HOUR: Tcal + 1°C (ACDCV Function) After 2 hour warm-up Accuracy relative to calibration std
300 V range
FREQUENCY PERCENT NUMBER OF COUNTS
OF >= 1 PLC 0.1 PLC +005 PLC +0005 PLC
READING |6 1/2 digits]5 1/2 digits|4 1/2 digits|3 1/2 digits
20Hz-45Hz . 1500 154 20
45Hz-100Hz S 1500 154 20
100Hz-20KHz . 1500 154 20
** 400H2-20KHz - 1500 2600 264
20KHz- 100KHz A 4320 440 48
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