200Amp AC Clamp Meter + NCV
Contents
1. The Diode symbol will appear in the display Press the MODE button to select the Continuity mode The continuity symbol will appear in the display If the resistance is lt 150 ohms the tone will sound 6 MA250 EU EN V3 2 6 11 Capacitance Measurements WARNING To avoid electric shock discharge the capacitor before measuring 1 Rotate the function switch to the CAP capacitance position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive als jack 3 Touch the black test probe tip to one side of the device Touch the red test probe tip to the other side of the device 4 Read the capacitance value in the display Type K Temperature Measurements Rotate the function switch to the F or C temperature position Insert the Temperature Probe into the input jacks Place the temperature probe tip s where needed PO E a Read the temperature on the display Note In case of an open input or a temperature overrange the meter will display OL 7 MA250 EU EN V3 2 6 11 Data Hold To freeze the LCD reading press the HOLD button The HOLD icon appears on the LCD Press the HOLD button again to return to normal operation Relative Press the REL button REL will appear in the display to zero the reading and create a reference point All future reading will be the difference between the actual reading and the stored REL reading In2. the REL mode autoranging is disabled and measurements are limited to the range active when the REL button was pressed Press the REL button to exit the mode Note Relative does not function in Frequency or Duty Cycle mode Automatic Power Off In order to conserve battery life the meter will automatically turn off after approximately 30 minutes To turn the meter on again change the position of the function switch Low battery indication When the icon appears in the display the battery should be replaced Refer to the battery replacement procedure in the maintenance section 8 MA250 EU EN V3 2 6 11 Maintenance WARNING To avoid electrical shock disconnect the meter from any circuit remove the test leads from the input terminals and turn OFF the meter before opening the case Do not operate the meter with an open case Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent do not use abrasives or solvents If the meter is not to be used for 60 days or more remove the battery and store it separately Battery Replacement 1 Remove the 2 Phillips head screws that secures the rear battery cover 2 Open the battery compartment 3 Replace the 2 AAA batteries 4 Secure the battery compartment door You as the end user are legally bound EU Battery ordinance to return all used batteries disposal in the household garbage is prohibited You can hand over your used batteries accumula
3. User s Guide EXTECH INSTRUMENTS A FLIR COMPANY 200Amp AC Clamp Meter NCV Model MA250 OFF auto Power or Mone Hz REL 200A AC Clamp Meter AUTO Introduction Congratulations on your purchase of this Extech MA250 Clamp Meter This meter measures AC Current AC DC Voltage Resistance Capacitance Frequency Diode Test Duty Cycle and Continuity Special features include Thermocouple Temperature and Non Contact Voltage detection The double molded case is designed for heavy duty use This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Safety International Safety Symbols This symbol adjacent to another symbol or terminal indicates the user must refer to the manual for further information voltages may be present AN This symbol adjacent to a terminal indicates that under normal use hazardous Double insulation This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury This CAUTION symbol indicates a potentially hazardous situation which if not CAUTION avoided may result damage to the product PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level Note Examples include protected electron
4. battery or fuses Inspect the condition of the test leads and the meter itself for any damage before operating the meter Repair or replace any damage before use Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard Always discharge capacitors and remove power from the device under test before performing Diode Resistance or Continuity tests Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the recessed electrical contacts Other means should be used to ensure that the terminals are not live If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired AAC 200A V DC V AC 600V DC AC Resistance Capacitance Frequency Diode 250V DC AC Test Continuity Temperature 3 MA250 EU EN V3 2 6 11 Description Meter Description Current clamp NCV LED indicator Clamp opening trigger MODE button HZ button LCD Display Negative input jack Non Contact Voltage Detector HOLD button Function Switch Relative Button Battery compartment rear Positive input jack Display icons Description 2008 AC Clamp Meter EX maz50 AUTO gt HOLD RELKMQHzZ WF ncia aa ws A AC n a ams eps C F A HNI Fahrenheit and Celsius units Temperature u M k Unit of measure prefixes
5. ement rate Thermocouple sensor Input Impedance AC bandwidth AC response Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Battery Auto power OFF Dimensions amp Weight Safety Approvals 30mm 1 18 approx 4 000 count LCD Threshold lt 150Q Test current lt 0 5mA Test current of 0 3mA typical Open circuit voltage 1 5VDC typical Battery symbol is displayed OL display 2 readings per second nominal Type K thermocouple required 10MQ VDC and VAC 50 to 400Hz VAC Average responding 5 C to 40 C 41 F to 104 F 20 C to 60 C 4 F to 140 F Max 80 up to 31 C 87 F decreasing linearly to 50 at 40 C 104 F lt 80 2000meters 7000ft maximum Two AAA 1 5V batteries After approx 30 minutes 200x66x37mm 7 9x2 6x1 5 205g 7 2302 For indoor use and in accordance with the requirements for double insulation to IEC1010 1 2001 EN61010 1 2001 Overvoltage Category III 600V Pollution Degree 2 Copyright 2011 Extech Instruments Corporation a FLIR company All rights reserved including the right of reproduction in whole or in part in any form www extech com 11 MA250 EU EN V3 2 6 11
6. ic circuits OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy consuming equipment to be supplied from the fixed installation Note Examples include household office and laboratory appliances OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations 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 2 MA250 EU EN V3 2 6 11 SAFETY NOTES Do not exceed the maximum allowable input range of any function Do not apply voltage to meter when resistance function is selected Set the function switch OFF when the meter is not in use Remove the battery if meter is to be stored for longer than 60 days WARNINGS Set function switch to the appropriate position before measuring When measuring volts do not switch to current resistance modes Do not measure current on a circuit whose voltage exceeds 600V When changing ranges always disconnect the test leads from the circuit under test CAUTIONS Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter Always remove the test leads before replacing the
7. nano milli micro mega and kilo HOLD Data Hold AUTO Autoranging DC Direct Current AC Alternating Current U Low battery R Relative V Volts Voltage Q Ohms Resistance A Amperes Current F Farad Capacitance Hz Hertz Frequency Duty Ratio F and C n m Continuity test gt Diode test MA250 EU EN V3 2 6 11 Operation NOTES Read and understand all Warning and Caution statements in this operation manual prior to using this meter Set the function select switch to the OFF position when the meter is not in use Non Contact Voltage Detector WARNING Risk of Electrocution Before use always test the Voltage Detector on a known live circuit to verify proper operation 1 Rotate the Function switch to any measurement position 2 Place the detector probe tip on the conductor to be tested 3 If AC voltage is present the NCV detector light will turn on with a steady red light NOTE The conductors in electrical cord sets are often twisted For best results move the probe tip along a length of the cord to assure placing the tip in close proximity to the live conductor NOTE The detector is designed with high sensitivity Static electricity or other sources of energy may randomlly trip the sensor This is normal operation AC Current Measurements WARNING Disconnect the test leads before making clamp measurements Rotate the Function switch to the 200A position 2 Pre
8. ss the trigger to open jaw Fully enclose only one conductor 3 Read the current value in the display 4 Ifthe value is less than 40A rotate the function switch to the 20A position to improve resolution 5 MA250 EU EN V3 2 6 11 AC DC Voltage Frequency Duty Cycle Measurements CAUTION Do not measure voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter D Rotate the function switch to the V position Press the MODE button to select AC or DC Voltage Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack Touch the black test probe tip to the negative side of the circuit Touch the red test probe tip to the positive side of the circuit Read the voltage value in the display Press the Hz button to display Frequency Press the Hz button to display Duty Cycle Resistance Diode Continuity Measurements Note Remove power from the device under test before making resistance measurements 1 2 Set the function switch to the Q position Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack Touch the black test probe tip to one side of the device Touch the red test probe tip to the other side of the device Read the resistance value in the display Press the MODE button to select the DIODE mode
9. tors at collection points in your community or wherever batteries accumulators are sold Disposal Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle 9 MA250 EU EN V3 2 6 11 Specifications r Accuracy AC Current 20 00 AAC 0 01A 2 5 8 digits 50 60H 200 0 AAC 2 8 8 digits AC Voltage 4 000 VAC 0 001V 50 to 400Hz EE 40 00 VAC 0 01V 1 8 8 digits 0 1V 2 5 8 digits 0 1mV 0 8 2 digits 0 001V 0 01V 1 5 2 digits 0 1V 2 0 2 digits 0 12 1 0 4 digits 0 001kQ 0 01kQ 1 5 2 digits 0 1kQ 0 001MQ 2 5 3 digits 0 01MQ 3 5 5 digits 0 01nF 4 0 20 digits 0 1nF 600 VAC DC Voltage 400 0 mvDC 600 VDC z 0 01uF 3 0 5 digits Capacitance 100 0uF 0 1uF Frequency 10 to 10kHz 0 01Hz 1 5 2 digits Sensitivity 15V rms Duty Cycle 0 5 to 99 0 0 1 1 2 2 digits Pulse width 100us to 100ms Frequency 10Hz to 10kHz Temperature 4 0 to 1400 F 0 1 lt 400 h EDES Type K 20 to 760 C 1 gt 400 Ave Oe Specification does not include probe accuracy Range of supplied probe is 22 to 572 F 30 to 300 C 400 0 VAC 4 000 VDC 40 00 VDC 400 0 VDC 4 000kQ 40 00kQ 400 0kQ 4 000MQ 40 00MQ 400 0nF 40 00uF 10 MA250 EU EN V3 2 6 11 General Specifications Clamp jaw opening Display Continuity check Diode test Low Battery indication Over range indication Measur
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