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4.
Preparation for use
The voltage supply has to be in the range from 100 V to 240 V, the frequency in range from 47 to 63 Hz.
The 1427 decade is a laboratory device. Its accuracy is valid at a temperature of 23 °C
±
5
°
C.
The Instrument is aimed for the use in horizontal or slope position. The angle of slope is determined by its
bottom foots.
After unpacking put the instrument on a flat desk.
If the instrument was stored out of range of reference temperatures:
Let it stabilize for at least one hour.
4.1
Switching on
Switch on the mains.
The mains switch is located at the rear panel.
After the switching on internal tests are performed for approx. 3 s. During this time the model
name of the instrument and the manufacturers name are shown at the display.
After finishing the tests, the setting of the decade operation is performed. Factory setting is the resistance
mode, value 100
Ω ( 100
°
F, 100
°
C ).
4.2
Warm-up period
After 10 min. warm-up period the decade meets its specified accuracy.
The decade can operate immediately after the switching on.
Note:
Perform recalibration only if the warm-up period is finished.
Summary of Contents for 1427
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