WIKA CTD9300 - Handbuch (Seite 52)

9037926 03/2005
Temperature Dry Well Calibrators CTD 9300
4. Operating the Calibrator
GB
52 WIKA Operating Instructions CTD 9300 Rev. 1
Connect the device to a power circuit with minimum risk of a power
failure, since it will no longer be possible to supply cooling air in
the case of a power failure.
4.2 Starting Procedure
If the calibrator is not used for an extended period of time, a small
amount of humidity may collect due to the hygroscopic
characteristic of the magnesium oxide used as insulating material
in the heating system.
After transporting or storing the device in a humid environment,the
heating elements must thus be heated slowly when starting the
calibrator. During the drying process, the device will not have
attained the isolation voltage required for protection class I.
The nominal startup value is T
anf
= 120 °C at a dwell time of
t
h
= 15 min.
4.3 Initial Use
Checks prior to initial use
Prior to initial use, the devices must be moved to their standard
upright operating position. When installing the device, make sure
that the fan on the bottom can circulate a sufficient rate of air. Do
not use soft, resilient surfaces.
Remove all highly combustible material from the vicinity of the
device and ensure that the device cannot come into contact with
easily inflammable or explosive media.
Proceed as follows:
„
Check the technical data specified on the type label.
„ Always place the CTD 9300 in an upright position. Otherwise
uniform temperature distribution in the block cannot be
ensured.
„ Do not use any filling media.