IMC C SERIES User Manual page 46

46 Properties of the imc C-SERIES
The digital signal changes from 0 to 1 when the analog signal exceeds the VREF + VHYST/2 threshold.
The digital signal changes from 1 to 0 when the analog signal falls below the VREF - VHYST/2 threshold.
The size of the hysteresis represents the width of a range-band inside of which the signal can fluctuate
(due to signal noise and interference) without an impulse being recorded.
Ranges:
·
VREF (Threshold) = -10 V .. +10V
·
VHYST (Hysteresis) = +100 mV...+4V
·
Low pass filter: None, 20 kHz, 2 kHz, 200 Hz
4.6.3.1.5 Single-signal/ Two-signal
The single signal counter returns a simple pulse sequence. This means that the pulse count and the time
between pulses can be determined, but not the rotation direction of the incremental counter.
A two signal encoder returns two pulse sequences with a 90° offset. Along with the pulse frequency, the
rotation direction can also be indicated as positive or negative. A measurement with two-signal counters
is selected in the combobox "Measurement mode" together with the desired operation type.
4.6.3.1.6 Zero pulse (index)
The zero pulse starts the encoder channels' counter mechanism. This means the measured values are
only recorded, if an event occurs at the index-channel. If measurement without a zero pulse is selected,
the measurement starts directly upon preparing the measurement.
·
The system only takes the zero pulse into account following preparing the measurement. Restarting
the measurement does not cause a reset.
·
If the zero pulse fails to appear, the INC4 does not start measurement at all. In that case, the channels
only return zero.
·
Depending on the particular CANSAS module, the index channel can pertain to multiple channels.
With the INC4, there is one index channel for all four channels; with the ENC6, there are two index
channels for a channel group having up to three channels.
© 2018 imc Test & Measurement GmbH
Note
imc C-SERIES - Manual, Version 4 R 3 - 2018-10-19