Description
20
Testboy
®
TV 441
Description
The measuring instrument serves to check the earth resistance of earthing systems such as foundation, rod or ring
earth electrodes. This can be performed with a two-pole or three-pole measurement. The measuring instrument
can also be used to measure the earth voltage.
The measuring instrument is fitted with a large, background illuminated LC display from which to read off the
measured value. The measuring instrument can save up to 100 groups of measured data which are retained after
interruption of the power supply. The measuring instrument can be used to measure maximum, minimum and
averages and for relative measurements. It is fitted with an automatic deactivation function.
Description of the test instrument
(1) Rotary switch
Switch between measurement of the earth voltage and two-pole or three-pole
measurement of the earth resistance.
(2) APS button
Activates or deactivates the automatic deactivation function.
(3) LIGHT button
Activates or deactivates the background illumination.
(4) CLEAR button
Deletes data.
(5) LCD
Displays the measured data and various symbols.
(6) READ button
Displays the measured data.
(7) MEMO button
Saves the measured data
(8) MEASURE button
Activates or deactivates the measurement of the resistance.
(9)
button
Selects a memory cell to save the measured data
(10) MAX/MIN/AVG button
Switches between the measurement of maximum, minimum and average.
(11) ENTER button
Confirms the saving or reading out of data.
(12) REL button
Selects relative measurement.
(13)
button
Selects a memory cell to save the measured data
(14) Jack E
Connects the measurement pole.
(15) Jack P/S
Connects the auxiliary earthing rod
(16) Jack C/H
Connects the auxiliary earther
