Casella CEL Thermohygrograph standard model - Manual (Page 5)

3. PREPARATION FOR USE
Once you have removed the THERMOHYGROGRAPH standard from the
packing you should have
¤ THERMOHYGROGRAPH standard,
¤ Tool kit,
¤ Document showing settings for the clock,
¤ Chart drum with lid,
¤ User Manual,
¤ Calibration certificate (supplied only with M109015).
Make sure that all foam packing is removed from inside the
THERMOHYGROGRAPH case. Also make sure that the rubber band which
holds the pen arms together is removed.
3.1 Removing/Replacing the Drum
Before attempting to remove or replace the drum, it is important to move the
pens out of the way by pulling the pen lifter control outward.
To remove the chart drum, first open the top of the unit. Then take off the lid
of the drum by simply pulling it upwards. The drum can now be pulled out by
holding the inside walls of the drum and lifting. Note that the drum may be
fairly tight in a new unit.
To replace the drum, carefully locate it on the clock drive shaft and firmly
push it home.
3.2 Fitting/Replacing the Battery
After removing the drum, the battery access cover can be found on the side
of the clock, at the rear of the unit.
To open the battery compartment, use either a coin or flat headed
screwdriver to rotate the cover a quarter turn anti-clockwise. The clock uses
a single AA (MN1500 or LR6) alkaline battery, which should be inserted with
the positive end facing outwards. To refit the battery cover, push it into the
battery compartment, ensuring that the slot is vertical. Turn the cover a
quarter turn clockwise to lock it.
3.3 Setting the Clock speed
With the chart drum removed set the three dip-switches in the clock base to
suit your requirements.
Preparation
Page 5 of 12
THERMOHYGROGRAPH standard
User Manual