ページを印刷する-- open circuit voltage: approximate 2.8V
3.2.10 Frequency Testing
Rrange
200KHz
-- Overload Protection: 250V DC or rms AC
-- Sensitivity:: 200mV rms and input no more than 10V rms
3.2.11 Temperature Testing
Range
Resolution
-20℃
to
1℃
1000℃
-- over-load Protection: 250V DC or rms AC
4. OPERATING INSTRUCTIONS
4.1 DATA HOLD
If you need data hold when measuring, you can put on "H", it will hold the reading; if you put the button again, data hold stops.
4.2 BACK LIGHT
If the dark circumstance light makes the reading difficulty when measuring, you can put on "
NOTE:
1. LED is the main source of back light, its working current is large, although the meter has the timer equipment (time limit is 5 seconds and it
will turn off automatically after 5 seconds; often use of back light will shorten life of battery, you'd better not use the b ack light so frequently if
it not necessary.)
2. When the battery voltage is less than 7V, it will show "
voltage is more than 7V, because the working current is higher and the voltage will decline. You need not replace the battery when you use
normally (back light is not being used), "
4.3 PREPARATION FOR MEASUREMENT
4.3.1 Put on the "POWER" button switch. If the battery voltage is less than 7V, display will show "
time.
4.3.2 The "
" besides the input jack shows that the input voltage or current should be less than specification on the sticker of meter to
protect the inner circuit from damaging.
4.3.3 Select a range properly for the item to be measured and set the rotary switch accordingly.
4.4 MEASURING VOLTAGE
4.4.1 Connect the black test lead to COM jack and the red to V/Ω/CAP jack.
4.4.2 Set the rotary switch at the desired V
4.4.3 Connect test leads across the source or load under
measurement.
4.4.4 You can get reading from LCD. The polarity of the red lead connection will be indicated along with t he voltage value when making DC
voltage measurement.
NOTE:
1.
When only the figure'1' or '-1' is displayed, it indicates over-range situation and the higher range has to be selected.
2.
When the value scale to be measured is unknown beforehand, set the range selector at the highest position.
3.
"
" means you can't input the voltage more than 1000V DC or 7000V rms AC, it's possible to show higher voltage, but it may dest roy
the inner circuit.
4.5 MEASURING CURRENT
4.5.1 Connect the black test lead to COM jack and the red to the mA jack for a maximum 200mA current , for a maximum 10A current, move the
red lead to the 10A jack.
4.5.2 Set the rotary switch at the desired A
4.5.3 Connect test leads in series with the load under measurement.
4.5.4 You can get reading from LCD. The polarity of the red lead connection will be indicated along with the current value when m aking DC
current measurement.
NOTE:
1.
When only the figure'1' or '-1' is displayed, it indicates over-range situation and the higher range has to be selected.
2.
When the value scale to be measured is unknown beforehand, set the range selector at the highest position.
3.
"
" means the socket mA's maximum current is 200mA and 10A's maximum current is 10A, over current will destroy the fuse.
4.6 MEASURING RESISTANCE
Resolution
100Hz
±(1.5% of rdg + 10 digits)
Accuracy
-20~0 ℃
0~400 ℃
400~1000 ℃
" will not show up.
or V~ range position.
or A~ range position.
Accuracy
±(5.0% of rdg + 5 digits)
±(1.0% of rdg + 3 digits)
±(2.0% of rdg + 3 digits)
", but if you use back light at the same time, maybe "
5
" to open the back light.
" will come up even if
", the battery should be replaced at this