IMC C SERIES User Manual

© 2018 imc Test & Measurement GmbH
imc C-SERIES - Manual, Version 4 R 3 - 2018-10-19
48 Properties of the imc C-SERIES
4.6.3.3 Mode (Time measurement)
Time measurement
The time measurement mode allows the definition of edge conditions between which the time
interval is to be measured.
The following combinations are possible:
positive edge
>
negative edge:
negative edge
>
positive edge:
positive edge
>
positive edge:
The combination negative edge
>
negative edge:
is not allowed
To ensure a high time resolution for the measurement results, suitable scaling must be set for the
measurement. An input range (INC4) or Max. time (s) (ENC-6) specifies the maximum time interval
which can be measured between the selected starting and stopping edge. The time between the
signal edges may not be greater than the selected input range. If the maximum time interval is
exceeded during measurement, the system returns the input value range end instead of the true
measured value.
Input range
Time resolution
Input range
Time resolution
1 ms
31,25 ns
250 ms
8 µs
2 ms
62,50 ns
500 ms
16 µs
4 ms
125 ns
1 s
32 µs
8 ms
250 ns
2 s
64 µs
16 ms
500 ns
4 s
128 µs
30 ms
1 µs
8 s
256 µs
60 ms
2 µs
16 s
512 µs
120 ms
4 µs
30 s
1024 ms
Time resolution of INC4
The time resolution corresponds to the value of an LSB (Least Significant Bit).
During sampling intervals when no time measurement was possible (because either a starting or
stopping edge was missing), the last valid return value continues to be returned until a time
measurement is completed. If there is no valid return value, zero is returned. If more than one time
measurement is completed during a single sampling interval (due to multiple starting and stopping
edges), the last time measured is returned.
Above is illustrated a measured signal from which time readings are taken. Each reading starts at a
positive edge in the signal and is stopped at a negative edge. The "up" arrows indicate the times at
which the system returns a result. The returned values in this case are T1 –twice; T2 –twice; and T3.

IMC C SERIES Specifications

General

Brand	IMC
Model	C SERIES
Category	Measuring Instruments
Language	English