6F8A0917
- 94 -
Pulse width
The pulse width for totalizer pulse output is set.
If Automatic setting (1:AUTO) is selected for pulse width mode, it is not necessary to set the pulse
width.
•
The pulse width must be set to a value within the range of 0.3ms to 500ms. If you try to set a
value exceeding 500 ms, the value will be forcibly changed to 500ms.
•
The pulse width must be set to 40% or less of the pulse period at 100% output. If a value
exceeding this limit is tried to set, regardless of the range described above, an error message
* H. OVER SPEC
appears and the value returns to the previously set value. Try to set a new value again.
If the pulse width is set to 0, it will be automatically set to 40% of the pulse period at 100% output.
However, if the calculation result exceeds 100ms, it will be forcibly set to 100ms.
Example 1 In the case of the following:
Range: 3,600m
3
/h (1m
3
/s)
Count rate: 0.001m
3
Since the count rate is 3,600 m
3
/h
÷
0.001(m
3
) = 3,600,000 pulses/h (1000 pulses/s),
the full-scale period is 1s
÷
1000 = 1ms.
Therefore, the pulse width can only be set to 1ms x 0.4 = 0.4ms.
Example 2 In the case of the following:
Rage: 3,600m
3
/h (1m
3
/s)
Count rate: 1000m
3
Since the pulse count is 3,600m
3
/h
÷
1000m
3
= 3.6 pulses/h (0.001 pulse/s), the
full-scale period is 1s
÷
0.001 = 1000s.
Therefore, the pulse width becomes 1000s
×
0.4 = 400s. However, since the maximum
value is 500ms, the pulse width becomes 500ms.
Example 3 In the case of the following:
Rage: 3,600m
3
/h (1m
3
/s)
Count rate: 1m
3
Pulse width is set to 0ms
Since the pulse count is 3,600m
3
/h
÷
1m
3
= 3600 pulses/h (1 pulse/s), the full-scale
period is 1s
÷
1 = 1s.
Therefore, the pulse width becomes 1s
×
0.4 = 400ms. However, in the case of
automatic setting, since the maximum value is 100ms, the pulse width becomes
100ms.
