- 7 -
5.3.1.3 In the turning on state, press key“
”for about 2 seconds, this instrument is turned
off and saved current setting information.
5.3.2 Measurement
5.3.2.1 Examples and conditions
There are two ways of measurements, normal measurement(flat surface or camber ) and
continuity measurement, users can select it on the measurement mode, the selection ways and
conditions are as follows:
Example1: normal measurement 1”shortcut operation mode” (Factory setting mode)
This is a pseudo temperature compensation mode, it doesn’t need to consider the temperature
value and coefficient, as long as the following two conditions are met.
①Temperature of the material to be measured is almost the same as the standard temperature
block, use the value of the standard block at 20℃to calibrate, then measure the conductivity for
the testing material..
②The material temperature coefficient of the material to be measure is the same as the
temperature of the standard block. If users want to measure the conductivity of the unknown
material of copper and aluminium sheet, it is right to calibrate as the same temperature coefficient
in the standard block (temperature coefficient of copper and aluminium is -0.004).
2.Operation methods
①When the material to be measured is of flat surface material, refer to “measurement mode” of
the menu 5.3.4.2 to select “close camber compensation”, and set “temperature compensation
mode” of the menu 5.3.4.3 into pseudo temperature compensation. Now both the temperature
value TAof measurement interface and standard interface and temperature coefficient value a0are
display invalid “None”, that is to say it doesn’t have to consider the current temperature value and
select the temperature coefficient when measuring and calibrating. As long as calibrate the
higher/lower value before the measurement. Then return to measurement interface to measure the
conductivity of the material. (refer to 5.3.3.4～5.3.3.6 and 5.3.2.8)
②When testing pieces is of“convex”or“concave”material. Go to the “measurement interface” of
menu 5.3.4.2 select “opening curvature compensation”. For “convex” camber, first change the
hand grip φ14mm probe into “ ”style, then calibrate higher and lower value on the calibration
interface, return to the measurement interface, select the value η(φ) of curvature compensation
coefficient (refer to 5.3.2.6), adjust“ ”grip to the suitable position(refer to 5.3.2.2-b), then
measure conductivity of the camber material.
③When measuring the thin plates or small pieces(area between φ8mm～φ14mm), should
change to φ8mm（500KHz）style probe, select φ8mm-500KHz probe in the “frequency and probe”
of menu 5.3.4.6, the measuring method is the same as ①.
Example2: normal measurement2 “Different temperature operating mode”
This mode is used that calibrations and measurements can’t be operated under the
same temperature circumstance(or calibration temperature isn’t the same as that of
testing material), such as tracking the conductivity change of the material under
different temperatures, and fasting measure the conductivity under non-normal
temperature conditions. This operation mode is relatively cumbersome, but it is
suitable for any occasion, the accuracy is much higher. (refer to 6.1.2.2 “automatic
