7404-10 Operations Manual
Rev A 7/25/2014
Page 42 of 82
Operation of Temp or Temp/Rh 6” Recorders (RCDR316/RCDR317)
Built in 6” ink pen temperature and or humidity recorders can be purchased with CARON
incubators. The recorders are shipped installed on the outer door of the incubator from
the factory and require no installation.
Changing the chart paper:
Press and hold the “change chart” button on the recorder (#3) for approximately one
second until the pen begins to move to the left of the chart and then release the button.
Wait until the pen has completely moved off of the chart. To remove the chart paper,
unscrew (counter-clockwise) the chart “hub” knob at the center of the chart. Remove the
old chart paper and position the new one so that the correct line coincides with the time
line groove on the chart plate.
Re-attach the chart “hub” knob and fasten securely against the chart. Press and hold
the “change chart” button (#3) again for approximately one second until the pen begins
to move back onto the chart and then release the button. Check to make sure that the
pen is marking on the chart paper. If it is not, then carefully adjust the pen arm to
establish contact with the paper.
Chart recorder marking system:
This type of pen consists of a self contained ink reservoir with a porous plastic stylus
which is snapped around the outer edge of the metal pen arm. A pen cap is provided to
extend the life of the ink pen during shipping or when the recording unit is not in service.
To remove the pen cap, gently lift the pen arm away from the chart paper. Remove the
black plastic pen cap to expose the fiber tip of the ink pen and gently place the pen back
onto the chart paper. Do not let the pen arm "snap" back onto the chart paper. This will
flatten the fiber tip of the pen and will no longer give you a fine line marking on the chart
paper. Place the pen cap in a safe place for future use. If the stylus does not touch the
chart, adjustment can be made by slightly bending the metal pen arm in the center
towards the chart paper. Do not use more pressure than is necessary to create a fine
line marking on the chart paper. As the pen ink supply runs out, the pen color will
become lighter. This indicates that the pen should be replaced.
Replacement of the Pen:
Recorders that are equipped with fiber tipped cartridge pens will have a cartridge that is
color coded "red" to designate pen number one and an optional cartridge that is color
coded "blue" to designate pen number two. The pen cartridge is securely fastened 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
