Hioki MEMORY HiLOGGER LR8450 Instruction Manual page 46

6
Under [Slope], select the slope to count.
↑

↓
7
Under [Threshold], select the level to count.
1 V
4 V
8
Under [Filter], select whether to use the chatter prevention filter.
Set to
OFF
9
Under [Smoothing], enter the smoothing processing time (when
1 s

Principal of rotational speed measurement
Under the following conditions, the integration pulse count is internally updated at a data refresh
interval of 10 ms:
• When the range is
• When the range is
The rotational speed at time t [s] is calculated by dividing the pulse count from (t - 1) to t [s] by the
number of pulses per revolution.
r
(r/s) =
r/s: Rotational speed per second
r (r/min) =
r/min: Rotational speed per minute (with smoothing set to
Example: Number of pulses per revolution = 4
When the range is set to [r/min] and smoothing is set to t
internally updated at a data refresh rate of 50 ms.
The rotational speed at time t [s] is calculated by dividing the pulse count from (t - t
number of pulses per revolution and multiplying the result by 60.
r (r/min) =
Find Quality Products Online at:
Integrates the number of times the pulse switches from low level to high level (rising).
Integrates the number of times the pulse switches from high level to low level (falling).
 Treats voltages that are greater than or equal to 1.0 V as high level and voltages that
are greater than or equal to 0 V but less than 0.5 V as low level.
Treats voltages that are greater than or equal to 4.0 V as high level and voltages that
are greater than or equal to 0 V but less than 1.5 V as low level.
[ON] to prevent false counting due to chatter in mechanical contact (relay) output.
ON
 ,
to 60 s
[r/s]
[r/min] and smoothing is set to
Integrated pulse count at t [s] − integrated pulse count at (t − 1) [s]
Number of pulses per revolution
Integrated pulse count at t [s] − integrated pulse count at (t − 1) [s]
Number of pulses per revolution
Integrated pulse count at 1 s = P1 = 1000 c
Integrated pulse count at 2 s = P2 = 2000 c
The rotation speed at t = 2 s (r
r = (2000 - 1000) / 4 = 250 r/s
t=2
Integrated pulse count at t [s] − integrated pulse count at (t − t
Number of pulses per revolution
GlobalTestSupply
www.
[1 s]
[1 s])
) can be calculated as follows:
t=2
[s], the integrated pulse count is
0
.com
Configuring Input Channels
[Range] is set to [r/min]).
× 60
) to t [s] by the
0
) [s]
60
0
×
t
0
sales@GlobalTestSupply.com