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Summary of Contents for Extech Instruments MG302
- Page 1 User's Guide Wireless TRMS Multimeter and Insulation Tester Model MG302...
- Page 2 Note – Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation. OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. Note – Examples include electricity meters and primary over-current protection equipment MG302-en-GB_v2.4 6/16...
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Page 3: Safety Instructions
NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. MG302-en-GB_v2.4 6/16... - Page 4 HOLD Display hold ºF Degrees Fahrenheit ºC Degrees Celsius Maximum Minimum Serial number second Setup parameter AC +DC Alternating current + Direct current TRMS True RMS Store Recall AUTO Auto Range Auto Power off enabled Backlight Auxiliary Displays MG302-en-GB_v2.4 6/16...
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Page 5: Dc Voltage Measurements
Press the MODE button again to indicate “%”. Read the % of duty cycle in the main display. Press EXIT to return to AC volts display 10. With ACV in the main display, press and hold EXIT for 2 seconds to measure AC+DC. MG302-en-GB_v2.4 6/16... -
Page 6: Mv Voltage Measurements
Read the current in the display. AC+DC In the VAC, mV(AC), 10A(AC), mA(AC) and uA(AC) measurement modes, press the EXIT button for 2 seconds to enter AC+DC test mode. The LCD shows the AC+DC icon. Press EXIT to exit this mode. MG302-en-GB_v2.4 6/16... -
Page 7: Ac Current (Frequency, Duty Cycle) Measurements
Touch the test probe tips across the circuit or part under test. It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading. Read the resistance in the display. MG302-en-GB_v2.4 6/16... -
Page 8: Continuity Check
Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive V jack. Press the MODE button to indicate “F” Touch the test leads to the capacitor to be tested. Read the capacitance value in the display MG302-en-GB_v2.4 6/16... -
Page 9: Temperature Measurements
Hz jack. Touch the test probe tips to the circuit under test. Read the frequency on the display. Press the MODE button to indicate “%”. Read the % duty cycle in the display. MG302-en-GB_v2.4 6/16... -
Page 10: Insulation Resistance Measurements
Subsequently, the meter will internally discharge the balance of the insulation test voltage. Note: Turning the function switch to another test position or pressing the EXIT button will abort an Insulation resistance test. RANGE MG302-en-GB_v2.4 6/16... -
Page 11: Autoranging/Manual Range Selection
The main display shows the Relative value (measured value minus the stored value). AC+DC In the VAC, mV(AC), 10A(AC), mA(AC) and uA(AC) measurement modes, press the EXIT button for 2 seconds to enter AC+DC test mode. The LCD shows the AC+DC icon. Press EXIT to exit this mode. MG302-en-GB_v2.4 6/16... -
Page 12: Display Backlight
Press the EXIT button to end the recall session. CLEAR ALL DATA From the OFF position, press and hold the RANGE button while turning the function switch to any on position Release the RANGE button. The memory has been cleared. MG302-en-GB_v2.4 6/16... -
Page 13: Alarm Limits
Press the SETUP button to step through the other functions and return to the normal operating mode. The meter will “beep” if the measured value is greater than the high limit or lower than the low limit. LOW BATTERY INDICATION When the icon appears in the display, the battery should be replaced. MG302-en-GB_v2.4 6/16... -
Page 14: Maintenance
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-of-life devices to a designated collection point for the disposal of electrical and electronic equipment. WARNING: To avoid electric shock, do not operate your meter until the battery cover is in place and fastened securely. MG302-en-GB_v2.4 6/16... -
Page 15: Replacing The Fuses
70-172-40], 10A/1000V fast blow for the 20A range [SIBA 50-199-06]). 6. Replace and secure the rear cover, battery and battery cover. WARNING: To avoid electric shock, do not operate your meter until the fuse cover is in place and fastened securely. MG302-en-GB_v2.4 6/16... -
Page 16: Specifications
(20A: 30 sec max with reduced accuracy) All AC voltage ranges are specified from 5% of range to 100% of range NOTE: Accuracy is stated at 65 F to 83 F (18 C to 28 C) and less than 75% RH. MG302-en-GB_v2.4 6/16... - Page 17 ±50 digits 0mA=-25%, 4mA=0%, 20mA=100%, 24mA=125% Note: Accuracy specifications consist of two elements: (% reading) – This is the accuracy of the measurement circuit. (+ digits) – This is the accuracy of the analog to digital converter. MG302-en-GB_v2.4 6/16...
- Page 18 +(2%+5) 400.1~4000 MΩ 1MΩ +(4%+5) Note: Accuracy specifications consist of two elements: (% reading) – This is the accuracy of the measurement circuit. (+ digits) – This is the accuracy of the analog to digital converter. MG302-en-GB_v2.4 6/16...
- Page 19 This meter is intended for origin of installation use and protected, against the users, by double insulation per EN61010-1 and IEC61010-1 2 Edition (2001) to Category IV 600V and Category III 1000V; Pollution Degree 2. Copyright © 2013‐2016 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form ISO‐9001 Certified www.extech.com MG302-en-GB_v2.4 6/16...
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