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7.9 Setting Pen Offset Compensation On/Off (Pen model, /D1 option)
The POC function eliminates deviation (phase difference) between the pens on the time
axis. The following figure shows a side view of the recording status for the 2 pen model
(3 pen model is similar).
The initial value is ‘OFF’.
Reference pen (2nd pen)
Reference pen is
2nd pen for 2 pen model
3rd pen for 3 pen model
Chart feeding direction
Front of Recorder
Recorder as Viewed from the Side
This figure shows that, in any pen recorder (in order to prevent collision between pens)
the pens must be offset by a distance P. Therefore, points recorded at the same time are
separated on the time axis.
In the case of Pen Offset Compensation, a delay memory is used to store measurement
data, equivalent to the time offset P of the pens (other than the reference pen).
The pens will start to record these stored data when the chart is fed by the amount of P
NOTE Immediately after the recording has been started, only the reference pen
operates normally. The other pens might not seem to operate correctly, but this
is due to the time offset.
When you stop the recording, the chart will stop and therefore data stored in the
delay memory will not be recorded anymore. Therefore, these data will be lost.
Note that an asterisk will be printed in the periodic printout when POC is ‘ON’.
Enter the SET UP mode by turning ‘ON’ the power while pressing and holding the [CH
UP] (ENT) key until the SET UP display appears.
Use the  key to select the display . Press the [ENT] key.
Select ‘ON’ or ‘OFF’ using the  key. Then press the [ENT] key. The display
Before leaving the SET UP mode, you have to store your new settings. Use the  key
to select the  display, and press the [ENT] key.
Select [ ] to keep your new settings or  to abort the settings, and
press the [ENT] key. After a few seconds, the OPERATION mode will appear.