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4 K400 Issue No. 1
2INSTALLATION
2.1 Preparation
General
• Remove the instrument from the carrying case and use it on a flat, stable
surface. To avoid any possible damage, either to the instrument or the unit
under test, the dry well of the instrument must be used in the vertical position.
• The fan system at the base of the instrument must be free from any obstruction.
• The dry well must be completely clean.
• Carefully read the SAFETY section of this manual.
2.2 Power Supply
CAUTION:
B
EFORE OPERATING, CHECK THAT THE POWER SUPPLY SELECTOR SWITCH
SETTING MATCHES THE POWER SUPPLY VOLTAGE.
The DBC series of calibrators operate from an a. c. power supply of 100 to 120 Vac
or 220 to 240 Vac, 50-60 Hz.
CAUTIONS:
1T
HE POWER SUPPLY MUST PROVIDE CONNECTION TO A PROTECTIVE GROUND
TERMINAL.
2T
HE INSTRUMENT MUST, AT ALL TIMES, BE CONNECTED TO THE SUPPLY EARTH
(
GROUND).
2.3 Temperature Probes
WARNING
AFTER USE, THE PROBES WILL BE VERY HOT. HANDLE WITH
CARE AND WAIT FOR THE PROBES TO COOL COMPLETELY.
The temperature probe to be tested must be correctly placed in the dry well to
produce accurate test results:
• Check the probe diameter and operating range and use reduction inserts with
the correct sized holes (the hole diameter should comply with EA-10/13
guidelines). A large temperature difference between probe and dry well causes
large measuring errors. This difference increases as the difference between
the diameters increases.
• Always clean the probes, before use.
• Do not force the probes into the dry well, insert the probe down to the bottom of
the dry well.