WIKA CTD9300 - Handbuch (Seite 13)

9037926 03/2005
13 WIKA Operating Instructions CTD 9300 Rev. 1
Temperature Dry Well Calibrators CTD 9300
2. Device Description
GB
2.3 Functional Description
The two devices have identical operating functions, independent of
the different heating principles - Peltier elements in the case of the
165 °C version and resistance heating elements in the case of the
650 °C type.
„
CTD 9300-165 for the range from -30 °C to 165 °C
„ CTD 9300-650 or the range from 40 °C to 650 °C
Both the temperature dry well calibrators are fitted with an
electronic temperature-controlled heating block. This heating block
is fitted with a 28 mm x 150 mm bore for holding the adapting
sleeve.
In this heating block, you can insert adaptor inserts, generally
referred to as adapting sleeves, with one or multiple test bores,
which act as an adapter between the probe (temperature switch,
thermocouple, thermometer or resistance thermometer) and the
heating block bore. The heating block is thermically insulated
against the housing wall.
In the central area of the graphic display
(I), the temperature of the
heating block and the set nominal value is displayed with a
resolution of 0.01 K.
The desired heating block temperature is predefined using the
block of 12 keys
(G). After confirming the new nominal value with
the ENTER key (E) and switching from measuring to control mode
with the CONTROL key (F), the control unit will start setting the
calibrator to the topical nominal temperature.
In the Info line
(K), the displayed mode will change from MEASURE
to CALIBRATE. The operating status HEAT UP, COOL DOWN and
TEMP. STABLE is displayed in the status bar
(H).
The temperature is considered STABLE when it changes by less
than 0.1 K within 5 s. Only when the ramp program is enabled does
the STABLE display depend on the set stability criteria tolerance
and duration.
In addition to the topical block temperature, the set nominal value
and the standard deviation or the minimum and maximum values of
the block temperature can be displayed. Using this information, it is
possible to draw a conclusion about the stability of the temperature
in the calibrator at first glance.