Datasheet

ManualsBrandsUNI-T ManualsClamp MetersCurrent Clamp Meter, 40MOhm, 10MHz, LCD

CONTENTS

I.Introduction---------------------------------------------1

II.Unpacking Inspection---------------------------------1

III.Rules for Safe Operation----------------------------2

IV.Electrical Symbols------------------------------------3

V.Appearance Structure--------------------------------4

VI.Display Symbols--------------------------------------5

VII.Key Functions and Automatic Shutdown-------6

VIII.Measurement Instructions------------------------7

1.DC Voltage Measurement-------------------------7

2.AC Voltage Measurement-------------------------8

3.Resistance Measurement-------------------------9

4.Diode Measurement------------------------------10

5.Conductance Detection--------------------------11

6.Capacitance Measurement---------------------12

7.Frequency Measurement------------------------13

8.Temperature Measurement---------------------14

9.DC Current Measurement-----------------------15

10.AC Current Measurement-----------------------16

IX.Technical Indicators---------------------------------17

X.Maintenance------------------------------------------22

Summary of content (18 pages)

PAGE 1
CONTENTS I.Introduction---------------------------------------------1 II.Unpacking Inspection---------------------------------1 III.Rules for Safe Operation----------------------------2 IV.Electrical Symbols------------------------------------3 V.Appearance Structure--------------------------------4 VI.Display Symbols--------------------------------------5 VII.Key Functions and Automatic Shutdown-------6 VIII.Measurement Instructions------------------------7 1.
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I.INTRODUCTION UT204A is a 3 3/4-bit AC/DC digital clamp meter (hereinafter referred to as “clampm eter”) with stable performance, safety and reliability. As a special electrician's instrument with excellent performance, machine circuit is designed on the basis of large-scale integrated circuit double-integer A/D converter with full-range overload protection circuit and specific appearance design.
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1. Please inspect clamp meter and probe before use to avoid damage or abnormal use. Please do not use the clamp meter again if probe 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 probe forehand during measurement.
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IV.ELECTRIC SYMBOLS Duplex insulation AC Diode Warning prompt Grounding DC Deficient battery Buzzing ON/OFF AC or DC To meet European Union standard. V.Appearance Structure (shown in 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.
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1. AC signal measurement instructions; 2. Negative polarity instructions; 3. DC signal measurement instructions; 4. Instructions of deficient battery charge; 5. Automatic range instructions; 6. Diode testing instructions; 7. ON/OFF detection instructions; 8. Measurement instructions of duty cycle; 9. Data maintenance instructions; 10. Measurement instructions of relative value; 11. Temperature measurement unit (℃); 12. Resistance measurement unit (ohm, kilo-ohm and mega-ohm); 13.
PAGE 6
It is a function selection key for switchover of V ,A ,Ω, , , and measurement gears by triggering. Note: Automatic shutdown function will be cancelled if pressing SELECT key for bootstrap after automatic shutdown. 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. Automatic shutdown function can be cancelled by pressing SELECT key for bootstrap.
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To set knob. Please place function knob to “V ” measurement gear. To select key functions. To set measured DC voltage to initially set value. Initially set automatic range can be set to relative range by pressing REL△ key. ●To connect load. To disconnect probe and measured circuit then remove probe from input end after all measurement operations. 2. AC voltage measurement (V～) (shown in Figure 4) Warning: Clamp meter cannot be used for conductive article of which voltage exceeds AC/DC 600V. ●To set knob.
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3. Resistance measurement (Ω) (shown in Figure 5) Warning: Be sure to cut off circuit power and discharge residual charge of all capacitors before load connection. ●To set knob. Please place function knob to “Ω, ，， “ measurement gear. ●To select key functions. To set measured DC voltage to initially set value. Initially set automatic range can be set to relative range by pressing REL△ key. ●To connect load. To gain excellent measured result by separating element from circuit.
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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. Conductance detection ( ) (shown in Figure 7) Warning: Be sure to cut off circuit power and discharge residual charge of all capacitors before load connection. ●To set knob. Please place function knob to” Ω, ，， “measurement gear. ●To select functions. To select conductance detection by pressing SELECT key; ●To connect load.
PAGE 10
Warning: Be sure to cut off circuit power and discharge residual charge of all capacitors before load connection. ●To set knob. Please place function knob to” Ω, ，， “measurement gear. ●To select functions. To select capacitance detection by pressing SELECT key; ●To connect load. 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.
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To disconnect probe and measured circuit then remove probe from input end after all measurement operations. 8.Temperature measurement (℃) (shown in Figure 10) ●To set knob. To place function knob to “℃”measurement gear. ●To select functions. ●To connect load. 1) LCD will display “OL” if failing to insert temperature sensor into temperature gear. Clamp meter will display current indoor temperature after user inserting temperature sensor.
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●To select functions. To set DC current measurement to initially set value. ●To connect load. Please do not loosen trigger suddenly. As a sensitive device, Hall element will be sensitive to heat and mechanical stress to different extents except magnetic sensitivity. Collision will cause short-term reading variation. Please open the clamp head by pressing trigger then fetch measured conductor by clamp head and loosen trigger slowly until it is closed completely.
PAGE 13
Please do not loosen trigger suddenly. As a sensitive device, Hall element will be sensitive to heat and mechanical stress to different extents except magnetic sensitivity. Collision will cause short-term reading variation. Please open the clamp head by pressing trigger then fetch measured conductor by clamp head and loosen trigger slowly until it is closed completely. Please check if measured conductor is in the middle of clamp head or not.
PAGE 14
The maximum forecast dimension of current conduits: Diameter of 26mm; Influence of electromagnetic field: Device used near electromagnetic field may display unstable or incorrect reading; 2.Environment limitation Indoor use The altitude height: 2,000m Safety rules: ICE 1010-1 CAT.II 600V CAT.III300V Hazard level: 2 Operation temperature & humidity: 0℃ to 30℃ (not more than 80%R.H.) 30℃ to 40℃ (not more than 75%R.H.) 40℃ to 50℃ (not more than 45%R.H.
PAGE 15
AC conversion type: AC conversion is to guarantee consistence with valid value by sine wave input and correction reading by way of response mode of average value. (3) Resistance (Ω) Range Resolution Accuracy Overload protection 400.0Ω 100mΩ 600Vp ±(1.2%+2) 4.000KΩ 1Ω ±(1%+2) 40.00KΩ 10Ω 400.0KΩ 100Ω 4.000MΩ 1KΩ ±(1.2%+2) 40.00MΩ 10KΩ ±(1.5%+2) (4) Diode test ( ) Range Resolution Accuracy 1mV Overload protection 600Vp 0.1Ω Overload protection 600Vp To display approximate positive pressure drop.
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(7) Frequency (Hz) Range Resolution Accuracy Overload protection 600Vp 10Hz 0.001Hz ±(0.5%+3) 100Hz 0.01Hz 1kHz 0.1Hz 10kHz 1Hz 100kHz 10Hz 1MHz 100Hz 10MHz 1kHz (Reading is only for reference.) Sensitivity: ≥300mV rms if ≤100kHz; ≥600mV rms if ＞100kHz; ≥800mV rms if ＞1MHz; (8) Temperature (℃) Range Accuracy Overload protection Plug-in -40℃ -40℃~0℃ ±(8%+5) resistance ~1,000℃ 0℃~400℃ ±(2.5%+3) of 1KΩ 400℃~1,000℃ ±(3.0%+3) Note: 1) There is no voltage protection for temperature gear.
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correct measurement can be guaranteed by following operation methods: ① Press the trigger and open clamp head to fetch measured conductor by clamp head then loosen trigger slowly until clamp head is closed completely. Please check if measured conductor is in the middle of clamp head or not. Additional reading error of ±1.
PAGE 18
B. To clean the shell periodically by dry cloth. However, it is not allowed to use detergent with abrasive or solvent components 2: Battery installation or replacement 1 6F22 9V battery shall be supplied for the product. Please install or replace the battery by following sequence: a. Please remove testing rod in the input end during shutdown. b. To let panel face downwardly, loosen screws on the cell box, extract cell cover then remove cell box. c.