HP 3457A Service Manual page 25

3457A General Information
Table 1-1. Specifications @
TRUE RMS AC CURRENT (Cont*d)
90 DAY: Tcal + 5°C (ACI Function) After 1 hour warm-up
1 A range. (1 amp maximum input)
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 95 2800 290 32
46H2- 100H2 0.4 2800 290 32
101Hz-20KHz 0.35 2800 290 32
** GOOHZ-20KHz 0.35 2800 750 80 12
* Specifications apply within one week of AC auto-cal (ACAL 2) for stable temperature
conditions. If AC auto-cal is not used, add 0.6 to the percent of reading figures.
For 1 year specifications, add .08% to the 90 day Percent of Reading figures.
** Using AC fast filter (ACBAND 400) for frequencies above 400Hz.
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 &
20H2-100KH: | 0.017 | 150 15 | 1.5 | 0.15
MEASUREMENT ACCURACY - DC COUPLED: +(% of reading + number of counts)
After two hour warm-up.
Sine-wave inputs > 10% of range.
AC slow filter ON (ACBAND 20).
Auto-zero ON.
For pre-programmed settling times, error is 0.1% of input current step.
HOUR: Tcal + 1°C (ACDCI Function) After 2 hour warm-up Accuracy relative to calibration std
30 mA and 300 mA ranges.
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
20H2-45Hz 1.5 16000 1600 165 20
46Hz-100Hz 0.35 16000 1600 165 20
101Hz-20KHz 0.25 16000 1600 165 20
** GOOHZ-20KHz 0.6 16000 3750 375 42
21KHz-100KHz 0.9 17500 1750 180 22
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