Honeywell DR4300 Alignment of Pen at Zero and Span, Procedure for Aligning Pen at Zero and Span

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 8-15to align the pens.

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

Step	Press			Action/Result
1		until you can see:
	SET
	UP		Upper Display
			ALIN
			Lower Display
			PEN
2		until you can see:
	FUNC
			Upper Display
			(value)	(approximately 60 on the upper display)
			Lower Display
			PEN0
		Wait until pen stops moving downscale.

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	Turn off the power to the recorder.
4	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).
5	Align the tip of pen 2 with the zero line on the chart and tighten the locking
	screw.
6	Align the tip of pen 1 with the zero line on the chart and tighten the locking
	screw.
7	Turn on the power and repeat Step 2.

188 DR4300 Circular Chart Recorder Product Manual 12/03