Alignment Of Pen At Zero And Span; Table 8-15 Procedure For Aligning Pen At Zero And Span - Honeywell DR4300 Product Manual

DR4300 Circular Chart Recorder

8.6 Alignment of Pen at Zero and Span

Introduction
If the pen trace does not track at the correct chart increment with a known input value, you can use the
following procedure to adjust the pen travel at zero and span (full scale) to compensate for the effects of
humidity on the chart size.
If the recorder has 2 pens, be sure Input1 (INP 1) is on the display. If it is not on display, press FUNC
key to toggle input for display.
Procedure
Follow the procedure in Table 8-15 to align the pens.
Step
1
SET
UP
2
FUNC
If the pen tip is greatly out of position, follow Steps 3 through 7. (Unless a pen arm has been
replaced, this probably will not be necessary.) If pen position requires only minor adjustment, go to
Step 8.
3
4
5
6
7
188

Table 8-15 Procedure for Aligning Pen at Zero and Span

Press
until you can see:
Upper Display
ALIN
Lower Display
PEN
until you can see:
Upper Display
(value)
Lower Display
PEN0
Wait until pen stops moving downscale.
Turn off the power to the recorder.
To place the pen tips in approximately the correct position, loosen the screw
holding the pen 1 (purple) arm to the servo shaft and move the pen arm to
access the locking screw for the pen 2 (red) arm (if applicable).
Align the tip of pen 1 with the zero line on the chart and tighten the locking
screw.
Align the tip of pen 2 with the zero line on the chart and tighten the locking
screw.
Turn on the power and repeat Step 2.
DR4300 Circular Chart Recorder Product Manual
Action/Result
(approximately 60 on the upper display)
4/00