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21
Refer to the following table to set the most suitable prescaling value.
Mode
Unit of display
Prescale value
Passing speed
mm/sec
1000L/60
m/sec
L/60
m/min
L
cm/sec
100L/60
cm/min
100L
km/h
0.06L
Where,
L = Distance between sensors (m)
Refer to
4-2 Setting Mode
.
Performance Characteristics
Accuracy of measurement
±
0.08% rdg
±
1 digit (ambient temperature: 23
°
C
±
5
°
C)
Measurement range
10 ms to 3200 s
Response time of HOLD input
20 ms max.
Recovery time (T
R
)
20 ms min.
ON/OFF pulse width
Sensor with transistor output: 9
m
s min.
Sensor with relay output: 15 ms min.
Response time
Output configuration
Relay output
Transistor
output
BCD and
transistor output
Linear and
transistor output
Communication
and transistor
output
Comparative output
25 ms max.
20 ms max.
35 ms max.
35 ms max.
20 ms max.
BCD output
---
---
Refer to page 93.
---
---
Linear output
---
---
---
40 ms max.
---
The response time of the HOLD input is the time required for the K3NP to
accept HOLD input after the HOLD input turns ON.
Recovery Time (T
R
)
Recovery time is the period required for the K3NP to become ready for the
next measuring operation after a measuring operation is completed. For
Transistor Output Models, comparative output remains ON during recovery
time. For other models, comparative output requires more time to turn ON.
When the comparative output terminals of the output board and the HOLD
input terminals are connected, set a sufficient recovery period, considering
the response time of the HOLD input. This is illustrated in the following dia-
gram.
SETTING
REFERENCE
Response Time of HOLD
Input
Passing Speed:
f1
Section 3-1
Summary of Contents for K3NP
Page 1: ...K3NP Period Meter Operation Manual Produced January 1998...
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