Instruction manual
Contents
1. AC Current 40mA 0 01mA 1 5 of rdg 3 mA 400mA 0 1mA digits Overload protection F 500mA 250V fuse for mA range Maximum input current 400mA dc or 400mA ac rms for mA range Resistance Function Range Resolution Accuracy 400 09 0 19 0 5 of rdg 3 digits 4 000kQ 10 Resistance 40 00kQ 10Q 5 no Q 400 0kQ 1000 0 5 of rdg 2 digits 4 000MQ 1kQ 40 00MQ 10kQ 1 5 of rdg 3 digits Overload protection 600V dc or 600V ac rms Capacitance Function Range Resolution Accuracy Capacitance lt 10nF 5 0 of rdg 50 dk 50nF 10pF digits 10 digits 3 0 of rdg 10 digits 500nF 100pF ae nE 3 0 of rdg 5 digits 100uF 100nF Overload protection 600V dc or 600V ac rms Dioda Test Function Range Resolution Accuracy Diode Test gt 1V 0 001V 1 0 uncertainty Overload protection 600V dc or 600V ac rms Test Condition Forward DC current approximately 1mA Reversed DC voltage approximately 1 5V Continuity Check Function Range Resolution Description Continuntiy Test 4009 0 10 Continuity beeper lt on 500 Overload protection 600V dc or 600V ac rms Test Condition Open circuit voltage approx 0 5V WITH AUTO POWER OFF FUNCTION GENERAL SPECIFICATIONS Environment conditions 600V CAT II Pollution degre2. 1 Press HOLD key short press Fixes the display on the current value DH is displayed 2 Asecond short press returns the meter to normal mode Select Key 1 Switches between dc and ac voltage or current 2 Disables automatic power off feature BATTERY SAVER The Meter enters the sleep mode and blanks the display if the Meter is on but not used for 30 minutes Press the HOLD key or rotate the rotary switch to wake the metes ip To disable the Sleep mode hold down the SELECT function key while turning the meter on BEEPER INDICATION When press the function key and if it is valid a beep will be emitted The buzzer will sound five times one minute before auto power off And a long sound to show the auto power off In the continuity measuring status if the resistance is smaller than 50 Q the buzzer will sound BATTERY amp FUSE REPLACEMENT To replace the Meter s battery If the sign BATT appears on the LCD display it indicates that the battery should be replaced Remove the screw on the back cover and open the battery case Replace the exhausted batteries with two new 1 5V batteries of the same type SR44 To replace the Meter s fuse Fuse rarely need replacement and blow almost always as a result of operator s error Open the case and replace the blown fuse with the same rating specified F 500mA 250V 5x20 WARNING Before attempting to open the case always be sure that test leads have been disconnected fro
3. For continuous protection against fire replace fuse only with ratings F 500mA 250V 5x20 Quick Acting Never use the meter unless the back cover is in place and fastened completely Do not use abrasives or solvents on the meter To clean it use only a damp cloth and mild detergent GENERAL DESCRIPTION This compact digital multimeter is designed to measure AC and DC voltage AC and DC current Resistance Capacitance Diode and to perform audible continuity checks with accuracy and ease Small and light weight with a carrying case and test leads wound on its body this instrument will provide you years of satisfactory service SPECIFICATION Accuracy is specified for one year after calibration at operating temperatures of 18 C to 28 C with relative humidity at 0 to 75 Accuracy specifications take the form of of Reading Number of Least Significant Digits Voltage Function Range Resolution Accuracy DC Millivolt 1 0 of rd mV as gamy h 0 digits i 4V imV DC Voltage 40V 10mV 0 5 of rdg 3 V 400V 100mV digits 600V 1V 4V imV AC Voltage 40V 10mV 1 0 of rdg 3 V 400V 100mV digits 600V 1V 1 Frequency Range 40Hz 500Hz 2 Response Average calibrated in rms of sine wave gt gt gt 2 3 Overload Protection 600V dc or 600V ac rms Current Function Range Resolution Accuracy DC Current 40mA 0 01mA 1 5 of rdg 3 mA 400mA 0 1mA digits
4. Pocket Multimeter M320 USER S MANUAL SAFETY INFORMATION Measurement category Il is for the measurements performed on circuits directly connected to the low voltage installation This meter has been designed according to IEC 1010 concerning electronic measuring instruments with an overvoltage category CAT II and pollution degree 2 Follow all safety and operating instructions to ensure the meter is used safely and is kept in good condition With proper use and care your digital multimeter will give you years of satisfactory service DURING USE Never exceed the protection limit indicated in the specifications for each range of measurement Never use the meter to measure voltages that might exceed 600V above earth ground in category II installations Always be careful when working with voltages above 60V dc or 30V ac rms Keep fingers behind the probe barriers while measuring Do not perform resistance measurements on live circuits Inspect test leads and probes for cracks breaks or crazes in the insulation before using the meter SAFETY SYMBOL Caution refer to the instruction manual Incorrect use may result in damage to the device or its components AC Alternating Current DC Direct Current AC or DC Earth ground Double insulated 2 Eyipa Fuse CE Conforms to European Union directives MAINTENACE Before opening case always disconnect test leads from all energized circuits
5. e 2 Altitude lt 2000m Operating temperature 0 40 C 32 F 122 F Storage temperature 10 60 C 14 F 140 F MAX Voltage between terminals and earth ground 600V AC rms or 600V DC Fuse Protection F 500mA 250V 5x20 Sample Rate 3 times sec for digital data Display 3999 LCD display Automatic indication of functions and symbols Range selection automatic Over Range indication LCD will display OL Low battery indication The BATT is displayed when the battery is under the proper operation range O Polarity indication displayed automatically O Power source 3V O Battery type SR44 O Dimensions 120 L x70 W x18 H mm O Weight 110g Approx battery included gt gt gt 4 5 lt lt lt OPERATING INSTRUCTION Voltage Measurement 1 Set rotary switch to the V range 2 Press the SELECT key to select DCV or ACV measuring mode 3 Connect the black and red test leads to the circuit being measured 4 Read the displayed value The polarity of red test lead connection will be indicated when making a DCV measurement Current Measurement 1 Turn off power to the circuit Discharge all high voltage capacitors 2 Set the rotary switch to the mA range 3 Press the SELECT key to select DCA or ACA measuring mode 4 Break the circuit path to be tested Touch the black probe to the more negative side of the break touch the red probe to the more positive side of the break Reversing the leads
6. m measurement circuits Close case and tighten screws completely before using the meter to avoid electrical shock hazard ACCESSORIES Battery 1 5V SR44 7 lt lt lt Carrying Case Operating manual 2 WLS040
7. will give a negative reading but will not damage the Meter 6 Turn on power to the circuit then read the display 7 Turn off power to the circuit and discharge all high voltage capacitors Remove the Meter and restore the circuit to normal operation Capacitance Measurement 1 Set the rotary switch to 4k range 2 Connect the test leads to the capacitor being measured and read the displayed value Resistance Measurement 1 Set the rotary switch to Q range 2 Connect the test leads to the circuit or resistor being measured and read the displayed value Diode Test 1 Set the rotary switch to PF range 2 For forward bias readings on any semiconductor component place the red test lead on the component s anode and place the black test lead on the component s cathode 3 The meter will show the approx forward voltage of the diode Audible Continuity Test 1 Set the rotary switch toe range 2 Connect the test leads to the resistance in the circuit being measured 3 When the test lead to the circuit is below 50Q a continuous beeping will indicate it KEY FUNCTION Hold Key Data Hold mode makes the meter stop updating the display Enabling Data Hold function in auto range mode makes the meter switch to Manual ranging mode but the full scale range remains the same Data Hold function can be cancelled by changing the measurement mode pressing RANGE key or push HOLD key again To enter and exit the Data Hold mode
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