Monitoring The External Event Operation; Maximizing Pen Life; Table 5-29 Maximizing Pen Life - Honeywell DR4500A Product Manual

Operation - Monitoring the External Event Operation

5.14 Monitoring the External Event Operation

Event pen function
If Function prompt "PEN 1IN" under Set-up prompt "PEN 1" has been configured as DGTL1 or DGTL2,
the pen (channel) operates as an "event pen" and tracks the remote contact (switch) closure by way of the
digital 1 or digital 2 input wired to the alarm output/digital input printed circuit board.
Event pen operation
When the switch opens, the pen for the channel tracks at the configured OFF position (0-100%) on the
chart.
When the switch closes, the pen tracks at the configured ON position (0-100%) on the chart and tracks at
this position until the switch is opened.
Thus, the "Event Pen" record makes it easy to monitor the on/off operation of an external event.

5.15 Maximizing Pen Life

Steps for maximizing pen life
T able 5-29 lists nine steps that will help to maximize the life of your chart pen.
8 7 H
Step
1
Store the chart paper in a cool, clean dry place where the temperature does not exceed 40°C
(104°F) and the humidity is below 65% RH.
2
Do not expose the pen tip and chart paper to abrasive chemicals or dust that cause excessive
pen wear.
If the recorder is used in a dusty atmosphere, provide a positive 'clean air purge' to minimize
3
dust particle accumulation on the chart paper.
4
Periodically clean the pen arm using a cotton swab dipped in alcohol. This is more important
when the recorder is located in a dusty environment and no 'clean air purge' is used.
5
Never let the pen tip ride on the chart plate when the paper is not present. Use the pen lifter to
raise the arm when changing the paper.
6
Keep the door closed while recording.
7
Always insert the pen arm tip into the shipping sponge when storing or shipping the recorder.
8
Be sure that the chart paper lays flat against the chart plate. Any ripple in the paper will cause
light pen printing.
9
Be sure the chart hub assembly is pushed onto the motor shaft so that it is flush with the chart
plate.
146 DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual

Table 5-29 Maximizing pen life

Action
Release M
April 2017