WIKA CTD9300 - Handbuch (Seite 27)

9037926 03/2005
GB
27 WIKA Operating Instructions CTD 9300 Rev. 1
Temperature Dry Well Calibrators CTD 9300
3. Moduses and Functions
3.1.1.4 Ramp Program
The ramp program with the associated auxiliary parameters is
enabled in the ramp menu. It is used, e.g. for checking recording
temperature measuring instruments.
Another field of application is
the temperature change test,
which makes it possible to draw
conclusions on the
reproducibility, the hysteresis
and the long-term and short-
term stability of temperature
sensors.
If a measuring instrument is integrated in the calibrator, the
measured values of the probes can be recorded at the selected
temperature ramps. Please also refer to the section DataLogger in
Chapter Measuring Instrument Setup Menu.
Temperature Ramp Function
The temperature ramp program is switched on by selecting the UP
and/or DOWN function with the cursor. The default setting is OFF.
In the ramp program, 6 different temperature ramps can be enabled
individually or together. For this purpose, the ramps are selected
with the cursor and enabled/disabled with the SELECT key. Every
single temperature ramp can be set to any desired temperature
Fig. 13: Ramp menu
Operating Hours
The operating hours counter continuously counts the time in
hours, for which the device is switched on.
Heat units
The heat units factor is a characteristic value for the thermic load of
the device. It permits conclusions on the average working
temperature of the temperature calibrator. The average working
temperature in °C is calculated as follows by approximation:
t
average
= t
amb.
+ ( heat units x 100 / operation hours )
where t
amb.
is the ambient temperature in °C.