Toshiba LF600F - Manual (Page 95)

TOSHIBA i6,F|8A0,8,6,9,
Either AUTO or MANUAL can be set for the pulse width setting mode.
Depending on the pulse width mode, the pulse width to be set varies as shown in the table below:
Selection item Pulse width value to be set
AUTO After the count rate is set, the pulse width is automatically set to one half of the pulse
frequency at 100% output.
MANUAL Even after the count rate is set, the pulse width is not changed.
* However, if the pulse width is out of the setting range as a result of count rate
setting, the screen is automatically switched to the pulse width setting screen after
the count rate setting.
* If the count rate exceeds 1000 (pulse/s), the pulse width setting mode is limited to the AUTO
mode only and you cannot perform manual setting.
Note: Pulse width setting range
Example 1 When the range is 3600m^/h (ImVs) and the count rate is 0.00Im^
Since the pulse rate is 3600 (m^/h) / 0.00l(m^) = 3600000 pulse/h (1000 pulse/s),
the full scale frequency is 1ms.
Therefore, the pulse width can be set to 1ms x 40% = 0.4ms only.
Example 2 When the range is 3600m^/h (ImVs) and the count rate is lOOOm^
Since the pulse rate is 3600(m3/h) / 1000(m3) = 3.6 pulse/h
(0.001 pulse/s), the full scale frequency is 1000000ms.
Therefore, the pulse width 1000000ms x 40% = 400000ms. However,
since the maximum value is 500ms, the pulse width will be 500ms.
Example 3 When the range is 3600m^/h (ImVs), the count rate is Im^and the pulse width is set to
0ms
Since the pulse rate is 3600(m3/h) / l(m3) = 3600 pulse/h (1 pulse/s),
the full scale frequency is 1000ms.
Therefore, the pulse width is 1000ms x 40% = 400ms. However, since the
maximum value is 100ms in the case of AUTO setting, the pulse width becomes
100ms.
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