Clear Data; Measurement Principle; Principle Of Resistance Measurement; Principle Of Current Measurement - ADInstruments AD6412 Manual

_______________________________________________________________________________

9. Clear Data

Press MODE key to enter the access mode of the stored data. Pressing down SET +
MODE combination key may automatically clear all the stored data. That is, press down
SET key while pressing down MODE key.
The display after a clearing operation is shown Figure 12.
In HOLD state, it is required to press down POWER key or SET key to quit from HOLD
state; then press MODE key to enter the access data mode, and followed by pressing
down SET + MODE combination key to clear all the stored data.
In the setting state of alarm critical value, it is required to press down POWER key or SET
key for 3 sec to quit from the setting state of alarm critical value before pressing MODE
key to switch to the access data mode; then press down SET + MODE combination key to
clear all the stored data
VIII. Measurement Principle

1. Principle of Resistance Measurement

The basic principle of AD6412 in the measurement of resistance is to measure the loop
resistance, as shown in the figure below. The jaw part of the Meter is comprised of voltage
coil and current coil. The voltage coil provides excitation signal, and will induce a potential
E on the measured loop. Under the effects of the potential E, the current I can generate on
the measured loop. The Meter will measure E & I, and the measured resistance R can be

2. Principle of Current Measurement

The basic principle of AD6412 in the measurement of current is the same with that of the
©Copyright Abacanto Digital SA.
obtained by the following formula.
Manual de usuario AD6412
AD Instruments
40