HP 3457A - Page 27

General Information 3457A
TRUE RMS AC CURRENT (Cont’d)
TEMPERATURE COEFFICIENT - DC COUPLED: All Ranges.
FREQUENCY PERCENT NUMBER OF COUNTS
READING |6 1/2 digits |5 V2 digits |4 1/2 digits |3 1/2 digits
20n2-100KH: | 0.017 | 1500 | 150 15 | ts
MAXIMUM READING RATES: (Readings/Second)
INTEGRATION | DIGITS READING RATE
TIME DISPLAYED |* AC SLOW RESPONSE |* AC FAST RESPONSE
60 Hz 50 Hz 60 Hz 50 Hz
0.0005 PLC 1/2 f ja B.5:
0.005 PLC 172 . . 9.5
0.1 PLC V2 s * 9.25
1 PLC 1/2 . . 7.25
10 PLC VW/2 . 65 2.0
100 PLC 1/2 . 17 0.25
Reading Rates apply with Auto-zero ON, fixed range and preprogrammed settling times.
* ACBAND set to < 400 for AC slow response and set to > 400 for AC fast response.
FREQUENCY AND PERIOD
Measures the frequency or period of the ac component of ac or de coupled voltage or current.
The counter uses a reciprocal counting technique to provide constant resolution independent of
the input frequency.
INPUT IMPEDANCE:
1 megohm shunted by < 90 picofarads.
MAXIMUM INPUTS:
Voltage:
Input Terminals - + 450V peak.
HI or LO to Earth Ground - + 450V peak.
Current:
1.5 amps from 250 volt source. Input is fuse protected.
FREQUENCY RANGE:
Voltage Function - 10Hz to 1.5MHz
Current Function - 10Hz to 100KHz
PERIOD RANGE:
Voltage Function - 100msec to 667nsec
Current Function - 100msec to 10usec
1-20