Caron 7000-75 - Manual (Page 31)

7000-50 & 7000-75 Series Operations Manual Rev A 1/6/2014 Page 31 of 71
to the metal pen arm using a special "U" clip tab. For ease of replacement, it is
suggested that the two screws that hold the pen arm be loosened and the pen
cartridge and metal pen arm be removed as an assembly. Unsnap the plastic "U" clip
tab of the pen cartridge from the metal pen arm, remove and discard the old pen
cartridge. Replace the new cartridge by opening the hinge and snapping it securely
around the metal pen arm. Refer to the image below:
Pen Arm Calibration:
To check and/or adjust the recording pen(s) calibration to the outer most temperature
graduation of the chart, press and hold the "change chart" button (#3) until the pen
begins to move off of the chart. Once the pen(s) has moved off of the chart, again
press and hold the "change chart" button (#3) until the pen begins to move back onto
the chart. The pen should briefly stop at the outer most temperature graduation of the
chart before continuing onto the chart to begin recording. If the pen does not stop
exactly at this location on the chart, it can be adjusted or "calibrated" by using the left
(#1) or right (#2) arrow buttons.
When the pen moves back onto the chart and briefly stops, you will have
approximately five seconds in which to adjust the pen’s position using the left and right
arrow buttons of Figure 3.
On multiple pen recorders, each pen will move (one at-a-time) onto the chart briefly
stopping at the outer most temperature graduation of the chart at which time the pen’s
position can be adjusted by using the left (#1) or right (#2) arrow buttons. When the
time to adjust the position of the first pen has expired, the second pen will move onto
the chart briefly stopping at the outer most temperature graduation of the chart at
which time the second pen’s position may be adjusted.
Each time the chart paper or fiber tip pen cartridge is changed, you should make sure
that each pen stops at the outer most temperature graduation of the chart paper.
Otherwise, this pen offset will cause the unit to record an incorrect temperature on the
chart.