- 6 -
6. AC110V/220V selector switch
7. Fuse
8. Power plug
9. RS232 interface
3. SPECIAL FUNCTIONS
3.1 Auto Power Off
The meter has two
powers
off function. In normal conditions when the meter is power on, if there is no operation
on any of the buttons or function keys within 30 mints, the meter will be automatically powered off. Five mints
before auto power off, the audible five beepers give indication that the meter is gong to be power off.
3.2 Setting Upper and Lower Limits for Measurement
The upper and lower measurement limits can be set up in the following steps:
1.
Set the upper limit: power on the meter
select range
press SET button
press SELECT button to
start the upper setting mode (“
” appears on secondary display)
press
buttons to adjust
the value
press SET button to validate the new input.
2.
Set the lower limit: power on the meter
select range
press SET button
press SELECT button to
start the lower setting mode (“
” appears on secondary display)
press
buttons to adjust
the value
press SET button to validate the new input.
3.
After setting up the upper and lower limits, measurement can be carried out and the LCD will have 3 kinds of
displays to the results:
a)
If the measuring value exceeds the upper limit, the LCD displays the measuring value on the primary
display and “
” on the secondary display.
b)
If the measuring value exceeds the lower limit, the LCD display the measuring value on the primary
display and “
” on the secondary display.
c)
If the measuring value is between and upper and lower limit, the LCD displays the measuring value on
the primary display and “
” on the secondary display.
3.3 Set up the Time for Measurement
1.
Press TIMER button to set enter the setup of time. The secondary display displays “0.00.00”
2.
Press SELECT button and the last digit of “0.00.00” on the secondary display glitters, which means this digit
can be adjusted. Use the
buttons to adjust the digit value. (The first digit from the left is hour, the
second and third are minute, the fourth and fifth are second.)
3.
Press TIMER button to validate the new setup. By now the measuring time is set.
3.4 Analog Bar Graph
The function of analog bar graph is imitating the analog needle of the meter but without the overshoot. The bar
graph refreshes data 40 times per second. Because the graph responds 10 times faster than the digital display, it is
widely used in the application of peak value test and zero calibration. It is also commonly used in observing the
rapid variation of input signals. The bar graph has 23 segments. The number of lit segments is relative to the
full-scale value of the selected range. One unit of the bar graph represents 4000 counts/bar except when in the
relative mode. The polarity is indicated at the left of the bar graph.
3.5 Square Wave Output
The square wave output is a very useful function. With adjustable square wave frequency and duty cycle, users
can carry out the pulse wave modulation (PWM) output, and adjust the voltage control, timer control and clock
