Download VELA - User and Technical Reference manual - Retro-kit

VELA Laboratory Manual 2.4
FREQUENCY METER
Description:
Program number:
Parameter:
Input:
This program measures the frequency of pulses, or of a
waveform, which can be of any regular shape.
04
None
To pulse input. Input should be in the range +/-25 V. The
signal should have a peak amplitude of at least +1 V. Signals
of less than +1 V peak amplitude will first need amplifying,
by connecting to the channel 1 input, selecting a suitable
Frequency range:
To use this
program:
Output:
range with the three position range switch and switching the
pulse input to ‘internal’.
1Hz to 20Hz. VELA’s display flashes ‘I-II’ if the input
frequency is too high to be measured.
1 Make appropriate connections to the VELA pulse input
if necessary via the channel 1 amplifier
(see above);
1
2 press ‘RESET’;
3 press ‘04’ to select the program number;
4 press ‘ENTER’.
T1
The frequency is displayed, in Hz, on the VELA display.
This is updated once every second.
NOTE: The display shows the last non-zero count in any
previous interval.
1
r
24