Safety User’s Manual Specifications This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information. This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present Double insulation 1. Improper use of this meter can cause damage, shock, injury or death. Read and understand this user manual before operating the meter. 2. Make sure any covers or battery doors are properly closed and ured. 3. Always remove the test leads before replacing the battery or fuses. 4. Inspect the condition of the test leads and the meter itself for any damage before operating the meter. Repair any damage before use. 5. Do not exceed the maximum rated input limits. 6. Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC. These voltages are considered a shock hazard. 7. Always discharge capacitors and remove power from the device under test before performing Diode, Resistance or Continuity tests. 8. Remove the battery from the meter if the meter is to be stored for long periods. 9. To avoid electric shock, do not measure AC current on any circuit whose voltage exceeds 250V AC. Input Limits Function Maximum Input VDC, VAC 600V AC/600V AC Resistance, Diode, Continuity 500V DC/AC mA DC 200mA DC 10A DC 10A DC (15 seconds max. every 15 min.) Frequency 250V DC/AC Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website at www.extech.com for contact information. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. Function Range Accuracy DC Voltage (V DC) 400.0mV ±(0.5% reading + 4 digits) MiniTecTM Series Model MN36 Auto-Ranging Mini MultiMeter 4.000V 40.00V 400.0V ±(0.8% reading + 4 digits) 600V AC Voltage (V AC) 50-60Hz 4.000V 40.00V 3999 400.0V 40-400Hz ±(0.8% rdg + 4 d) ±(1.2% rdg + 5 d) ±(2% rdg + 5 d) 600V DC Current 400.0µA 4000µA 40.00mA ±(1.2% reading + 4 digits) 200.0mA 10A Introduction Congratulations on your purchase of Extech’s MN36 Auto-Ranging Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Temperature, Diode Test and Continuity. Proper use and care of this meter will provide many years of reliable service. AC Current (40 to 400Hz) 40.00mA ±(2.5% reading + 4 digits) ±(1.5% reading + 5 digits) 200.0mA 10A Resistance ±(3% reading + 5 digits) 400.0Ω 4.000kΩ Specifications Stated at 73oF ±10oF (23oC ±5 oC) and less than 70% RH Diode Test Test current of 0.6mA maximum, open circuit voltage 1.5V DC typical Continuity Check Audible signal will sound if the resistance is less than approximately <8Ω Temperature sensor Requires type K thermocouple Input Impedance 10MΩ (V AC/DC) Display 3999 count LCD Overrange “OL” is displayed Polarity Automatic (no indication for positive polarity); Minus (-) sign for negative polarity. Measurement Rate 3 times per second, nominal Low Battery “ ” is displayed if battery voltage drops below operating voltage Batteries Requires (2) AAA batteries Fuses mA range; 250mA/250V fast blow 10A range, no protection Operating Temp 32oF to 104oF (0oC to 40oC) Storage Temp -4oF to 140oF (-20oC to 60oC) Relative Humidity Maximum relative humidity 80% for temperatures up to 31°C decreasing linearly to 50% relative humidity at 40°C. Operating Altitude 7000ft (2000 meters) maximum Weight 5.4 oz. (153g). Size 5.43” x 2.83” x 1.5” (138mm x 72mm x 38mm) Safety For indoor use and in accordance with Overvoltage Category II, Pollution Degree 2. Category II includes local level, appliance, portable equipment, etc., with transient overvoltages less than Overvoltage Category III 400.0µA 4000µA 40.00kΩ Accuracy ±(1.2% reading + 4 digits) 400.0kΩ 4.000MΩ Capacitance 20.00MΩ ±(3.0% reading + 5 digits) 4.000nF Not specified 40.00nF 400.0nF ±(3.0% reading + 10 digits) 4.000µF 40.00µF Not Specified 100µF Frequency 10.00Hz 100Hz 1.000kHz ±(1.0% reading + 4 digits) 10Hz to 1MHz 10.00kHz 100.0kHz Sensitivity: 5.0Vrms 1.000MHz Temp °F Temp °C 5.000MHz -40 to 1400°F Not specified -40 to 650°F; ±(1.0% rdg + 10 digits) 651 to 1400°F; ±(3% rdg + 10 digits) -20 to 400°C; ±(1.0% rdg + 10 digits) -20 to 750°C 400 to 750°C; ±(3% rdg + 10 digits) (probe accuracy not included) Symbols •))) mV, V Ω, kΩ, MΩ µA, mA, A o o F, C H AC (voltage) DC (direct current or voltage) Continuity and Diode test millivolt, volt (voltage) ohm, kilohm, megohm (resistance) microamp, milliamp, Amp (current) Degrees fahrenheit, centigrade (temperature) Low battery Display hold Meter Description 1. 2. 3. 4. 5. 6. 7. 8. LCD Display DATA HOLD button SELECT button Function switch Positive input jack COM jack 10A jack Rubber boot 1 2 3 3999 4 5 6 7 8 Note: Tilt stand and battery access is on the rear of unit. Resistance Measurements 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive Ω jack. 2. Set the function switch to the Ω position. 3. 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. 4. Read the resistance in the display. Capacitance Measurements 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive CAP jack. 2. Turn the rotary switch to the position. 3. Touch the test probes to the circuit or device under test and read the capacitance on the display. Frequency Measurements 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive HZ jack. 2. Turn the rotary switch to the Hz position. 3. Touch the test probes to the circuit or under test and read the frequency or duty cycle on the display. Temperature Measurements WARNING: To avoid electric shock, disconnect test leads from any source of voltage before making a temperature measurement. Be sure that the thermocouple has been removed before changing to any other measurement function. 1. Insert the type K thermocouple probe into the Temp and COM jacks. 2. Turn the rotary switch to the oF or oC position. 3. Read the temperature on the display. Auto Power Off 1. This meter will automatically shut off after approximately 15 minutes of operation. If the meter shuts off, rotate the function switch to OFF and on again (or press the HOLD button) to resume operation. 2. To disable the auto power off, hold the SELECT button while turning power on or press the SELECT button after auto power off has turned the meter off. Maintenance WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery/fuse cover. WARNING: To avoid electric shock, do not operate your meter until the battery/fuse cover is in place and fastened securely. This Multimeter is designed to provide years of dependable service, if the following care instructions are performed. 1. Keep the meter dry. 2. Use and store the meter in mild ambient conditions. Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts. 3. Handle the meter gently. Dropping it can damage the electronic parts or the case. 4. Keep the meter clean. Wipe the case occasionally with a damp cloth. DO NOT use chemicals, cleaning solvents or detergents. 5. Use only fresh batteries of the recommended size and type. Remove old or weak batteries so they do not leak and damage the unit. 6. If the meter is to be stored for a long period of time, the batteries should be removed to prevent damage to the unit. UL LISTED The UL mark does not indicate that this product has been evaluated for the accuracy of its readings. Operating Instructions Voltage Measurements 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack. 2. Turn the rotary switch to the V position. 3. Press the SELECT button to select either AC or DC. 4. Touch the test probes to the circuit under test and read the voltage on the display. Current Measurements CAUTION: Do not make high current measurements on the 10A scale for longer than 15 seconds followed by a 15 minute cool down period. Exceeding 15 seconds may cause damage to the meter and/or the test leads. 1. Insert the black test lead banana plug into the negative COM jack. 2. For current measurements up to 200mA DC, set the function switch to the µA or mA position and insert the red test lead banana plug into the mA jack. 3. For current measurements up to 10A DC, set the function switch to the 10A range and insert the red test lead banana plug into the 10A jack. 4. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current. 5. 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. 6. Apply power to the circuit. 7. Read the current in the display. Battery and Fuse Replacement Continuity Measurements 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V/Ω/mA jack. Observe polarity. 2. Turn the rotary switch to the •))) position. 3. Touch the test probes to the circuit or device under test. If the resistance is less than approximately 30Ω the buzzer will sound. Diode Measurements 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V/Ω/mA jack. 2. Turn the rotary switch to the •))) position. 3. Touch the test probes to the diode under test. Forward voltage will indicate 0.4V to 0.7V. Reverse voltage will indicate “OL”. Shorted devices will indicate near 0mV and an open device will indicate “OL” in both polarities. Data Hold Press the Hold button to freeze the reading in the display. “H” will appear in the LCD. Press the key again to release the display. Low Battery If the + - low battery icon appears in the display, replace the batteries to maintain proper operation. Auto-Ranging The meter will auto range to the optimum range to provide the best resolution and accuracy for the input signal. WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery/fuse cover. 1. Disconnect the test leads from the meter. 2. Remove the rubber holster (if in place). 3. Remove the two screws securing the rear cover using a Phillips head screwdriver. 4. Batteries: Lift the cover off and replace the batteries observing the correct polarity. Insert the new batteries into the battery holder. 5. Fuse: Remove the old fuse by gently pulling up on it. Install the new fuse by gently pushing it into the holder. Always use a fuse of the proper size and value; 250mA/250V fast blow. 6. Replace the rear cover and secure with the screws. Support Hotline (781) 890-7440 Tech support: Ext. 200; Email: [email protected] Repair/Returns: Ext. 210; Email: [email protected] Website: www.extech.com Specifications subject to change without notice Extech Instruments Corporation 285 Bear Hill Rd. Waltham, MA 02451 Copyright © 2004 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form Model MN36 V2.1 505