Mastech MS8239D, Руководство оператора, Страница: 8 / 12

11 12
3.2.8 Engine Rev
3.2.12 Diode
1mV
Display :read approximate
forward voltage of diode.
- Forward DC Current: approx. 1mA
- Reversed DC Voltage: approx.1.5V
- Overload Protection: 250V DC or rms AC
4. Operating Instruction
4.1 Power-up
Press the “ ON/OFF ” button to turn the meter
ON or OFF.
4.2 Data Hold
If you need data hold when measuring, you can put
on “
DATA-H ” button, it will hold the reading; if you
put the button again, data hold is not continue.
4.3 Maximum Value Hold
If you need data hold when measuring, you can put
on
“MAX. H” button, it will hold the maximum value;
if you put the button again, maximum value hold is
not continue.
4.5 Back Light
If the light is dark to make the reading
difficult when measuring, you can press
“ ” button for two seconds to turn on the
back light, which will last for 15 seconds.
Continuous pressing the button for two
seconds will turn off the back light.
4CYL 10RPM
Range
Resolution
±(
3.0% of rdg + 3 digits)
Accuracy
- Overload Protection: 250V DC or rms AC
6CYL
8CYL
10RPM
10RPM
Range
Function
4.4 Function Transform
Put down the " FUNC ." when measuring the
current and voltage. Meter will be transformed
between DC and AC range. Put
"FUNC." when
measuring the temperature, meter will transform
between and
°
F range. Put "FUNC." when
measuring the diode and continuity, meter will
transform among them.
Note:
• LED is the main source of back light. Its working
current is large, although the meter has the timer
equipment (time is 15 seconds and it will off
automatically after 15 seconds);often use back light
will shorten thebatteryife, you'd better not to use the
back light so frequently if it's not necessary.
When the battery voltage is less than 2.8V, it will
show“ ”. But if you use back light at the same time,
maybe “ ” will come up even if the battery voltage
is more than 2.8V, because the working current is
higher and the voltage will decline. (When “ ”
shows, the accuracy of the measurement can not be
assured.) You need not replace the battery. When
you use normally (back light is not using), “ ” will
not show up. You need replace it till “ ”show again.
•