2. Symbols………………………………
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1. jaw opening 25mm Measuring enviroment temperature 5 C 35 C Storage temperature 10 C S0 C AC Current Range Resolution Accuracy 2000mA ImA 3 0 5 20A 10mA 2 5 5 200A 0 1A 2 5 5 600A 1A 3 0 5 Measuring frequency range 50Hz 60 Hz Max input current 120 of full value time lt 60 seconds It can t guarantee the accuracy if the current is lower than 200mA AC Voltage Range Resolution Accuracy 600V 1V 2 0 5 Input impedance 10M Measuring frequency range 40Hz 400 Hz Max input voltage AC 600V virtual value DC Voltage Range Resolution Accuracy 600V 1V 1 2 2 Input impedance 10M Q Max input voltage DC 600V Resistance Range Resolution Accuracy 2000 Q 1 2 5 Overload protection 250V DC or AC virtual value Test voltage is about 2 8V The open circuit voltage of the two test leads is about 2 5V short circuit current is about 1 6mA Diode and continuity test Range Remark Test condition forward current is approx ImA Reverse circuit voltage is approx 2 5V Open circuit voltage is approx 2 5V short circuit current is about 1 6mA indicate forward a voltage drop of diode the buzzer will beep 0 when conductance resistance approx lt 30Q A Warning Before opening the back cover make sure the test lead doesn t connect to the circuit an2. Cotent 1 Safety PPeeeeereere ere e re eee eee eee ee eee ee eee eee eee eee eee eee eee ee eee PAS o T 3 Cautions TETTETETT ere ere ere ere eee eee eee ee eee ee eee eee eee eee ee ee ee ee AS Mamtenanier iiie eenen anene ea EEEE RE 5 O Summaryeteteeeeteetreetterteretetterterteretesenseeereereerteneeneeet 6 Instrument structure creer ett ett tte t cece et ct cece nee ces ccc ccc ccc cescecceeens J Operationss s sssseesseeseesseseeseeesscneeessenseeseeeneceseenaeees 8 Technic specifications Perea ee ere ere ere eee eee ee eee eee ee eee eee eee eee eee ee eee ee eee Q Warnings s s eseesssescesseeseeeseceeesseseeseeeeecnseessenaeees 10 Accessory s sssssstestessessseesecssceseesseeeeceececessenseeeeeeneens Safety HD90A is designed and produced according to the safety standard of electronic test instrument and hand held current clamp meter IEC1010 1 and IEC1010 2 03 strictly follow to the standard of double insulation DC 600V CAT or 300V CATIII and pollution degree 2 Symbols DC ac Q 1 buzzer low battery A warning o double insulation CAT II A high voltage earth H data holds Cautions Only the leads supplied with the instrument guarantee compliance with the safety standard They must be in a good condition and they must be replaced with an identical model Check the instrument amp leads before use the multimeter If any unusual condition appears such as breakage of testing en
3. amage the instrument with higher voltage 4 The open circuit voltage of the two test leads is about 2 5V short circuit current is about 1 6mA Circuit continuity test 1 Insert the red test lead into the V jack and the black one into the COM jack At this time the polarity of the red lead is of the inner circuit 2 Set the Function Range switch to the o position connect the test lead to the ends of being tested circuit If the resistance between the two ends is lower than 309 the inner buzzer beeps to idciate it is continuity 3 The open circuit voltage of the two test leads is about 2 5V short circuit current is about 1 6mA Technic specification Accuracy reading digit one year guarantee Enviroment temperature 23 C 5 C Relative humidity lt 75 Temperature coeficient 0 1 x accuracy 1 C General characteristic Max voltage between the voltage input end and earth DC 600V CAT II or 300V CATIII Display model LCD display max reading 1999 Measurement principle double integration A D transform Range select manual Measurement speed 2 5 3 times sec Polarity display it displays as inputting negative polarity Overloading display only 1 appears on the display screen Data hold function H is shown on the top of LCD Low battery display it displays on the left of LCD Power supply 2X 1 5V Dimensions 170 x 65 x 27 mm Weight approx 140g without battery Max
4. d metal part no LCD display and deformation or fracture of the meter s shell do not conduct any measuring When the meter is on test don t touch the available input end You must be very careful when measuring voltage over DC 60V amp AC 30V Do not touch the exposed part of the test leads If the voltage value is unknown select the highest range Don t attempt to take any voltage measurement that exceeds the limits Don t measure the voltage over allowed input value Keep the test lead and the circuit under test in open circuit mode Before measuring the resistance on circuit remove power from the circuit being tested and let the capacitor release all the charge Before the capacitance test please let the capacitor release all the charge Don t keep the meters exposed in strong light hot temperature or moisture Don t touch the exposed wire joints and the circuit under test Maintenance Make sure the test lead is removed from the measuring circuit before opening the back cover of the instrument For cleaning the instrument use a wet cloth and a little scour Never use solvents Please ask the trained technicians or with their help to do calibration or repairs If there is any unusual condition please stop using at once and send to repair Description HD90A is 3 1 2 digital clamp meter with steady performance safety and reliability full function The instrument has a unique and more attractive o
5. d exmine if the back cover is fastened as you use the instrument If there is the sy me on the display screen it indicates that the battery needs to replace and do as the following 1 Disconnect the test lead and the tested circuit Rotate the Function Range to the position OFF and pull the test lead out of the input jack 2 Use the screwdrive to screw the screw on the battery cover and open the cover 3 Take out the old battery and replace it with the new one 4 Close the battery cover and fasten the screw Accessories User s manual one piece Test lead one piece Power supply 2X 1 5V two pieces Warranty card one piece
6. jaw then you can get the current value of the lead You can t measure two or three leads simultaneously 3 Set the tested object in the center of the jaw to ensure the measurement accuracy 4 Read the measuring result on the LCD screen Remark If you don t know the current range of the tested object please set the Function Range to 600A position and then cut down gradually untill you get the satisfying resolution DC Voltage measurement 1 Insert the red test into the V jack and the black one into the COM jack 2 Set the Function Range switch to the DC Voltage position and connect the test lead to the power or load to be tested the polarity of the terminal connected to the red test lead will be displayed on LCD at the same time 3 Read the measuring result on the LCD screen Remark 1 If the tested voltage mage is unknown set the Function Range switch to the Max range then cut down gradually until you get the satisfying resolution 2 Ifthe LCD only displays 1 it indicates overrange the Function Range switch should be set to a higher position 3 Don t input voltage over 600V it is possible to display higher voltage but it is dangerous to the inner line of the instrument 4 Specially pay attention to your safety as measuring high voltage AC Voltage measurement 1 Insert the red test lead into the V jack and the black one into the COM jack 2 Set the Function Range switch to the AC vo
7. ltage position and connect the test lead to the power or the load to be tested 3 Read the measuring result on the LCD screen Remark Consult the remark 1 2 3 and 4 of DC voltage Resistance measurement 1 Insert the red test lead and the black one to the V and COM jack respectively 2 Set the Function Range switch to the related Q position and connect the test lead to the tested object 3 Read the measuring result on the LCD screen Remark 1 If the tested resistance value is over the max vualue of the seclected range the symbol 1 will appear on the LCD 2 When measuring on circuit resistance cut off all the power supply first of the tested circuit and let the capacitor release all the storage charge completely 3 The open circuit voltage of the two test leads is about 2 5V short circuit current is about 1 6mA 7 Diode measurement 1 Inset the red test lead and the black one into V COM jack respectively V is the positive pole of the circuit 2 Set the Function Range switch to the position PF connect the test leads to the two ends of the tested diode it displays the forward inductance voltage unit is Q it displays overloading when the diode connected in reverse Remark 1 It displays overloading when the two test leads on open circuit 1 appears in the screen 2 The current through the tested device is about 1mA 3 Max input protection is 250V it will d
8. utline molding is more beautiful and convenient operation The instrument applies high performance A D transformer all the components are SMD surfaced And all the range positions have overloading protection function not easy to damage AC current is measured through the clamp jaw with four positions of 2000mA 20A 200A 600A the rest input through the test lead and can test AC Voltage DC Voltage Resistance Diode and continuity The meter has HOLD key to read and record for the users during the measurement Instrument structure 1 AC Current jaw pick up AC current 2 Function Range switch select function and range 3 Display 3 1 2 digits word height 15mm 4 Voltage Resistance Diode and Continuity test jack when having resistance measruement the red lead positive pole inputs into terminal 5 COM jack the black lead negative pole inputs into terminal except AC Current 6 Data hold press HOLD key the meter s LCD will hold the last measuring reading and display symbol JH press it again the instrument return to the normal measuring state 7 Jaw trigger press down the trigger to open the jaw release it to close the jaw 8 Jaw central position mark make the tested cable through the center of the jaw as much as possbile Operation AC current measurement 1 Set the Function Range switch to AC Current position 2 Press down the trigger to open the jaw and insert the lead into the clamp jaw Close the
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