Omega RD100B - Manual (Page 199)

11-7
Maintenance
11
11.6 Adjusting the Dot Printing Position (Dot Model)
This section explains the details of adjusting the dot printing position on the chart paper.
It is recommended that the position be adjusted once a year to assure its recording
accuracy.
Note
Dot printing position is adjusted under standard operating conditions when the recorder is
shipped from the factory. Because the chart paper may expand or contract depending on the
environment in which the recorder is used, it is recommended that the position be readjusted
before use.
Procedure
1. Warm up the recorder for at least 30 minutes.
2. Check that the operating environment such as ambient temperature and
humidity is within the normal operating conditions (see section 12.6).
3. Hold down the MENU key for 3 seconds to enter Setting mode.
4. Hold down the and keys simultaneously for 3 seconds to enter Basic
Setting mode.
5. Press the key or SHIFT + key to select P_Adj and then press the
key.
6. Press the key to select Hysteresis (center of the chart paper), Zero (left
edge of the chart paper), or Full (right edge of the chart paper) and then press
the key.
Adjust Hysteresis first followed by Zero and then Full.
Adjusting the Hysteresis
A line is drawn at the center of the chart paper. If the line appears as shown in Figure
a, increase the displayed setting. Then press the key. If the line appears as shown
in Figure b, decrease the displayed setting. Then, press the key.
To change the setting, press the key to move the cursor and key to change
the value.
Repeat this procedure until the line becomes straight.
A value change of 1 corresponds to 0.1 mm change in the dot printing position.
Up
Down Down
Up
Figure a Figure b
Adjusting Zero and Full
A line is drawn to the left edge for Zero and right edge for Full.
Increase or decrease the displayed setting so that the drawn line is aligned with the
scale line on the chart paper. Then, press the key. The procedure of changing the
setting is the same as with the adjustment of hysteresis.
The line moves after the key is pressed.
A value change of 1 corresponds to 0.1mm change in the dot printing position.
Decreasing the value moves the line to the left and increasing the value moves the
line to the right.