Twilight DT4200, Instruction Manual

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Checking the Relative Value/Performing Zero Adjustment
4.4 Checking the Relative Value/
Performing Zero Adjustment
The relative value comparing to the standard value can be
checked (relative function).
It can also be used as the zero adjustment function.
Zero adjustment eliminates the in
fl uences of the test lead wiring
resistance (continuity, resistance measurement) and the wiring
capacity (capacitor measurement).
• When the following measurement function is selected, this
function is disabled.
AUTO V, Frequency, Diode, Electric charge detection
• The DT4223 and DT4224 can display relative values for
frequency input.
Checking the relative value (REL)
Example 1: DC voltage measurement
For the DT4221, DT4222
When the standard value is measured,
press
for at least 1 second.
For the DT4223, DT4224
When the standard value is measured,
press
for at least 1 second.
[ ] lights up.
The relative value is displayed.
To cancel the state, press it for at least 1
second again.
([ ] goes off.)