HTC CM-2007 Manuale - Pagina 3

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prevent the electric shock.

 Function choosing switch: Used to select the function, range or turn

on or turn off the clamp meter.

Function

Description

ACA measurement.

ACV, D CV m easur e ment . P ress " SELECT" t o s wi t ch t he m easur e ment m ode. P r e ss " Hz/DUTY" t o s wi t c h t o F r e quency/Dut y c ycl e m easurement m ode

NCV

Non-contact voltage test.

Press "SELECT" to switch to Diode, Continuity,

Capacitance and Resistance measurement mode.

Frequency measurement.

Temperature measurement. Press "SELECT" button to switch

℃ ℉

to ℃ or ℉.

 Function key.

LIGHT button: Backlight and Clamp light control key. Press

LIGHT button more than 2 seconds, backlight and clamp light will be

on. Press this button again, the backlight and clamp light will be off.

The backlight will auto turn off after 5 seconds if not pressing it again.

SELECT button: Function selection key. Press this button to select the

measurement mode: Under "

" mode, choose DC or AC. Under

" mode, choose "

" "

", "

HOLD button: Press "HOLD" button, the current testing value will

be kept displayed on the LCD, and press this button again to cancel this

function. When this function works, user cannot do any new test.

REL button: Press this button to clear the readings and enter into the

Relative measurement mode and a "REL" symbol will be displayed on

the LCD. Press this button again to cancel this function.

 LCD: Displaying measurement value and unit.

V/Ω input terminal: Measurement inputs positive terminal (red

test lead).

COM input terminal: Measurement inputs negative terminal (black

test lead).

 Carrying belt.

4.2 ACA MEASUREMENT

(1) Turn the rotary switch to

Ω"

measurement.

range.

(2) Open the clamp jaw and grip one

wire and get the reading directly.

To get the most precise reading, should user put the wire in the

middle of the close jaw

Note:

Firstly users should select the highest range, if users are

not sure about the range of current under test, and then select the

proper range based on displaying value.

No.

Symbol

Description

Indicates negative readings.





AC measurement.



DC measurement.



Auto

Auto range.

Null.





Diode test.



Continuity beeper is on.

HOLD

Data hold



REL

Relative measurement.





Low battery indication.

hFE

Null.

℃，℉

℉ null.

NCV

Non-contact voltage testing.

nF，uF

○

MΩ，kΩ，Ω

mV, V

uA， mA， A

Hz，kHz，MHz

(refer to the picture 3).

DO NOT input the current higher than the limit, or it

would damage the meter.

4.3

ACV MEASUREMENT

(1)

Turn the function swift to

range.

(2)

Insert the black test lead into "COM"

terminal, and the red one into "V/Ω" terminal.

(3)

Connect the test leads into the circuit and get

the measurement value from the LCD. (refer to

picture 4)

Note:

1. DO NOT input the voltage over the limit, or it would damage

the meter.

2. Be careful while measuring a high voltage circuit. Do not touch

the high voltage circuit.

4.4 DCV MEASUREMENT

(1) Turn the function swift to DCV range.

(2) Insert the black test lead into "COM" terminal, and

the red one into "V/Ω" terminal.

(3) Connect test leads to the test point. LCD will display

polarity and voltage of the test point connected by the

red test lead. (refer to picture 5)

Note:

1. DO NOT input the voltage over the limit, or it would damage

the meter.

2. Be careful while measuring a high voltage circuit. Do not touch

the high voltage circuit.

4.5 NCV MEASUREMENT

NCV Static electricity or other sources of energy

may randomly trigger the sensor. The result is only

for reference.

4.5.1 Turn the rotary switch to NCV position.

4.5.2 Hold the top of the meter very close to the

voltage

source

under

test.

4.5.3 If voltage is present, the NCV LED will flicker rapidly or

intermittently

NOTE:

1. Even no indication when NCV test, there might still voltage be.

(picture 4)