User manual

Measuring frequency and period
The Model 2000 can make frequency measurements from 3Hz to 500kHz on voltage
ranges of 100mV, 1V, 10V, 100V, and 750V. Period measurements can be taken from 2µs
to 333ms on the same voltage ranges as the frequency.
The instrument uses the volts input terminals to measure frequency. The AC voltage
range can be changed with the RANGE
and keys. The signal voltage must be greater
than 10% of the full-scale range.
CAUTION The voltage limit is subject to the 8 × 10
7
V•Hz product.
Trigger level
Frequency and Period use a zero-crossing trigger, meaning that a count is taken when
the frequency crosses the zero level. The Model 2000 uses a reciprocal counting technique
to measure frequency and period. This method generates constant measurement resolution
for any input frequency. The multimeter’s AC voltage measurement section performs input
signal conditioning.
2000-900 (J - Aug 2010) BOOK.fm Page 26 Wednesday, October 12, 2011 12:29 PM