UT204A UT204A Clamp Meter Electronic Instruments说明

UT204A UT204A Clamp Meter Electronic Instruments说明

and Warnings carefully before using the meter.

Warning

UT204A is a 4000-count AC/DC digital clamp meter

with stable performance, high degree of safety and

reliability. It is designed with large-scale integrated

circuits and dual integral A/D converter as its core,

overload protection for all ranges and novel structure,

which make it a superb tool for electricians. The

meter can measure AC/DC voltage, AC/DC current,

resistance, diode, continuity, capacitance, frequency

and temperature, etc.

II. Unpacking Inspection

III. Safety Information

Please open the package box and take instrument

out. Please check if following items are deficient or

damaged or not.

1 pc

1 pair

1 pc

1.

2. Test Probes

3. Temperature probe

4. Guarantee certificate 1 pc

Please contact your supplier instantly if any

item is deficient or damaged.

The instrument is designed and manufactured in

compliance with GB4793, IEC61010-1 and IEC

1010-2-032: Double Insulation, Overvoltage CAT

Ⅱ600V & CATⅢ 300V and Pollution Degree 2.

A Warning identifies conditions and actions that

may pose hazards to the user, or cause damage

specified as follows, otherwise the protection offered

by the clamp meter would be impaired.

1. Please inspect clamp meter and test leads before

use to avoid damage or abnormal use. Please

do not use the clamp meter again if test leads or

shell insulation is damaged obviously with LCD

display failure or clamp meter cannot operate

normally.

2. It is strictly prohibited to use clamp meter before

covering rear cover and battery cell to avoid

electric shock.

3. Fingers cannot exceed the finger guard of probe

during measurement. Do not touch nude electric

wires, connector, unused input end or circuits

during measurement to avoid electric shock.

4. Function switch must be in correct position

before measurement. It is strictly prohibited to

change ranges during measurement to avoid

damage of clamp meter.

5. Do not exert more than 600V between terminal

of clamp meter and grounding to avoid electric

Shock or damage of clamp meter.

6. To operate the instrument carefully under DC 60V

or AC 30V to avoid electric shock.

7. Do not measure voltage or current which is more

than permissible input value. Be sure to place

function range switch to the maximum range

position if scope of measured value cannot be

determined. Be sure to cut off circuit power and

discharge all capacitors before measuring

of online resistance, diode or circuit. Disconnect

probe and measured circuit then remove probe

from input end of clamp meter and cut off power

after measurement.

8. Replace the battery when“ ” shows on the

LCD to ensure the measuring accuracy.To

take battery out if clamp meter has not been

used for a long time.

9. Please do not alter internal wiring of clamp meter

randomly to avoid instrument damage and safety

danger.

10.Do not store or use clamp meter in environment

of high-temperature, high-humidity, flammables,

explosives and strong current magnetic Field.

11.Please clean the instrument shell by soft cloth

and neutral detergent during maintenance. Do

not use abrasive or solvent to avoid shell

corrosion which may cause any damage to the

clamp meter or personal injury.

V.The Meter Structure (See Figure 1)

1. Input end;

2. LCD digit display;

3. Function key: To select basic functions;

4. Measurement function knob: White mark is

initially set value; Blue mark is validated after

selecting blue key;

5. Clamp head trigger: To press

the trigger to loosen clamp

head. Clamp head will be

again

trigger;

6. Hand protection: It prevents

users from touching any

dangerous area.

7. Clamp head: It is a device to

convert current to voltage. Single

conductor of measured current must pass through

center of clamp head perpendicularly;

Figure 1

tightened

if loosening the

measure AC/DC current to

VI.Display Symbols(See Figure 2)

1. Indicator for AC Measurement;

2. Indicates negative polarity;

3. Indicator for DC Measurement;

4. Low Battery Indication;

5. under Auto-Ranging Mode;

6. Indicator for Diode Test;

7. Indicator for Continuity Test;

8. Indicator for Duty Cycle Test;

9. Data Hold is Active;

10. Indicator for Relative Measurement;

11. Temperature Unit (℃);

12. Resistance Unit (Ω, KΩ and MΩ);

13. Frequency Unit (Hz);

14. Capacitance Unit (nF and µF);

15. Current Unit (A);

16. Voltage Unit (mV and V)

VII. Key Functions and Automatic

Shutdown

1.HOLD

It is to maintain displayed reading by triggering.

Displayed value will be locked for constant display

by pressing the key once. It can be pressed again

to release locking status and return to common

measurement status.

2.REL

3.SELECT

To switch over between

Note: Automatic shutdown function will be

cancelled if pressing SELECT key to wake up

the meter from the sleep mode.

4.Automatic Shutdown

Clamp meter will power off automatically

(under sleeping status) to save electric energy if

function key and knob switch fail to operate

within 15 minutes during measurement. Clamp

meter will start up automatically (under

working status) by rotating function key under

automatic shutdown status. (Please refer to Item

6 for effective key operation.)

Press down the key to use current reading as the

reference value and reset the display to "0". This

reference value is subtracted every time from

measuring results until you press the key again

to exit the mode.

Note: Automatic shutdown function will be

cancelled by pressing SELECT key for wake-up

under sleeping status.

5.Buzzer

Buzzer will beep if pressing any effective function

key under any measurement range. It will not ring

if the key is invalid. Buzzer will issue 5 warning

voices continuously about 1 minute before

automatic shutdown. It also will issue a long-term

voice before power off.

6.Key validity

Not all keys are valid under any range. As indicated

below, corresponding functions or to wake up the

meter can be achieved only when the keys are valid.

VIII. Measurement Instructions

(See Figure 3)

conductive object of which voltage exceeds

AC/DC 600V.

To set knob.

Please place function knob to

To select key functions.

The clamp meter defaults at

DC Voltage and auto-ranging

mode. Press REL △ to

access relative mode.

To connect load.

T o disconnect probe

and measured circuit then

remove probe from input

end after all measurement

operations.

Figure 3

2. AC voltage measurement ( ) (See Figure 4)

conductive article of which voltage exceeds

AC/DC 600V.

To set knob.

To select key functions.

Press SELECT button to

select AC voltage mode,

it defaults at auto

-ranging.Press

REL△ to access

relative mode.

To connect load.

~

~

Figure 4

To disconnect probe and

measured circuit then

remove probe from

input end after all measurement operations.

3. Resistance measurement ( ) (See Figure 5)

To set knob.

knob to

To select key

functions.

It defaults at Ω

To connect load.

To gain excellent measured result by separating

element from circuit.

T o disconnect probe and measured circuit then

remove probe from input end after all

measurement operations.

(See Figure 6)

discharge residual charge

of all capacitors before

load connection.

To set knob.

Please place

function knob to

To select functions.

To select diode detection

by pressing SELECT key;

To connect load.Figure 6

To gain excellent measured result by separating

element from circuit.

To disconnect probe and measured circuit then

remove probe from input end after all

measurement operations.

5. Continuity Test ( ) (See Figure 7)

discharge residual charge of all capacitors

before load connection.

To set knob.

Please place function knob to

To select functions.

To select conductance detection by pressing

SELECT key;

To connect load.

.

Buzzer will ring if

i s less than

10. It can ring or

end after all measurement operations.

6. Capacitance measurement ( ) (See

discharge residual charge of all capacitors

before load connection.

To set knob.

Please place function knob to

To select functions.

To select capacitance detection by pressing

SELECT key;

To connect load.

Figure 8

Measurement notice:

1)Be sure to reset by

pressing REL key

before measurement.

2)Instrument reading will

delay for about 30

seconds normally when

measuring large capacitance.

To disconnect probe and measured circuit then

remove probe from input end after all

measurement operations.

7.Frequency measurement (Hz) (See Figure 9)

Warning: Clamp meter cannot be used for

conductive objecte of which voltage exceeds

AC/DC 600V.

To set knob.

Please place function knob to Hz

To select key functions.

To connect load.

Figure 9

To disconnect probe and

measured circuit then

remove probe from

input end after all

measurement

operations.

Operating Manual

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