Casella CEL Thermohygrograph standard model - Manual (Page 6)

Refer to the diagram supplied (or the one above) for the required
switch positions.
3.4 Fitting/Replacing the Chart
1. Remove the chart drum and its lid as described earlier.
2. Slide the chart retaining clip upwards and remove any existing chart.
3. Wrap a new chart around the drum, ensuring that its ends overlap at
the point where the clip fits.
Make sure the paper is as low as possible on the drum so that the
base line on the chart aligns at the overlap.
Failure to observe these points will cause an error in the recording.
4. Carefully replace the clip, making sure that the chart does not move.
5. Pull the pen lifter outwards, moving the pens away from the spindle.
6. Lower the clock drum on to the spindle, this is a push fit.
7. Replace the chart drum lid, aligning the slot in the lid with the chart
clip.
3.5 Fitting/Replacing the Pens
1. Take one pen out of each sachet.
The short-reach pen with black ink (M118004) fits the short arm and
records temperature.
The long-reach pen with red ink (M119003) fits the long arm and
records relative humidity.
Leave the other pens sealed for future use.
2. Gain access to the pens by removing the glazing from the window
in the case nearest to them.
Preparation
OFF 1 DAY 7 DAY 31 DAY
1 1 1 1 2 2 2 2 3 3 3 3
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Page 6 of 12
THERMOHYGROGRAPH standard
User Manual