5.4.2. Relative Measurement (REL)
The relative measurement feature lets you measure values relative to a reference value and then
measure the difference between the actual value and the reference value.
Follow the steps to set a reference value:
1. Take a reading of your reference value
2. Press the REL-button to activate the REL-Mode, REL appears on the display
3. The measured reference value will be shown in the left secondary display
4. Take your further measurements and see the differences between the reference and the actual
values in the primary display.
5.4.3. Instruction for Buttons
FUNC
Used to switch between different measurement functions.
Press this button to turn on or off the backlight.
Press this button to arouse the meter from Sleep after the meter turns off
autimatically.
MAX/MIN
Press the button, the display will show the symbol" MAX" and the maximum
reading. Press the button again, the display will show the symbol" MIN " and the
minimum reading. Press the button once more, the display will show the
flickering " MAX" and " MIN " along with the present reading. Press and hold for
more than 1 second to exit the MAX MIN mode, the meter will return to normal
operation.
Hz/Duty
In AC voltage (or AC current) measurement mode, press this button to switch
among AC voltage (or AC current), frequency and duty cycle measurements.
When the Function/Range switch is in the" Hz/Duty" position, press this button
to switch between frequency and duty cycle measurements.
USB
Press this button to enable the data transmission from meter to PC, the symbol"
USB " will appear on the display and auto power off will be disabled.
Power Supply Selector Switch
-
When the switch is in " AC " position, the meter is powered by AC 230V / 50Hz.
-
When the switch is in " DC" position, the meter is powered by six 1.5V batteries (UM-3) located
in the battery compartment of the meter.
Power Switch
Used to turn on or off the meter.
Power Socket
Used to connect the meter to a 230V / 50Hz power source via power cord.
Line-Power Fuse Holder
Line-power fuse: F 250mA/250V; 5x20mm
USB Connector
This USB connector is internally optically isolated and is used to connect the meter to USB port of
computer for data transmission.
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