MN35 Manual - Test Equipment Depot
Contents
1. Test Equipment 99 Washington Street Depot Melrose MA 02176 Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 517 8431 call EXT TRUMENTS ieee 1000 EXT INSTRUMENTS MiniTec Series Model MN35 Manual Ranging Mini MultiMeter MN35 MULTIMETER Introduction Congratulations on your purchase of Extech s MN35 Manual Ranging Multimeter This meter measures AC DC Voltage DC Current Resistance Temperature Battery Test Diode Test and Continuity Proper use and care of this meter will provide many 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 use hazardous voltages may be present Double insulation A This symbol adjacent to a terminal indicates that under normal Safety Precautions 1 M Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter Make sure any covers or battery doors are properly closed and ured Always remove the test leads before replacing the battery or fuses Inspect the condition of the test leads and the meter itself for any damage before operating the meter Repair any damage before use Do not exceed the maximum rated input limits Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages2. amp Amp current FG Degrees fahrenheit centigrade temperature Low battery HOLD Display hold 5 MN35 V2 0 2 05 Meter Description LCD Display Hold button Function switch COM jack 10A jack Positive jack ouahuon Note Tilt stand and battery access is on the rear of unit Operating Instructions Note If H and a blank screen appear when the meter is turned on the HOLD feature is active Press the HOLD button to exit the HOLD mode AC or DC 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 highest VAC or VDC position 3 Touch the test probes to the circuit under test and read the voltage on the display 4 Reset the function switch to successively lower positions to obtain a higher resolution reading If the polarity is reversed DC voltage only the display will show minus before the value Test Equipment Depot 99 Washington Street Melrose MA 02176 781 665 1400 800 517 8431 Fax 781 665 0780 6 MN35 V2 0 2 05 DC Current Measurements CAUTION Do not make 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 5 6 7 Insert the black test lead banana plug into the negative COM jack For
3. are considered a shock hazard Always discharge capacitors and remove power from the device under test before performing Diode Resistance or Continuity tests Remove the battery from the meter if the meter is to be stored for long periods 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 DC AC Resistance Diode Continuity 500V DC AC mA DC 250mA DC 10A DC 10A DC 15sec max every 15 min 3 MN35 V20 2 05 Specifications Function Range Accuracy DC Voltage V DC 200 0mV 2 000V a 30 00V 0 5 reading 2 digits 200 0V 600V 0 8 reading 2 digits ve wie AG 1 2 reading 10 digits DC Current A DC 200 0mA 1 5 reading 2 digits 10 00A 3 0 reading 5 digits Resistance 200 0Q 0 8 reading 4 digits 2 000kQ 20 00kQ 0 8 reading 2 digits 200 0kQ 20 00MQ 3 0 reading 3 digits Temp F 4 to 1400 F 4 to 59 F 2 5 reading 19 digits 60 to 750 F 1 0 reading 9 digits 751 to 1400F 2 5 reading 19 digits Temp C 20 to 750 C 20 to 16 C 2 5 reading 10 digits 17 to 400 C 1 0 reading 5 digits 400 to 750 C 2 5 reading 10 digits probe accuracy not included Accuracy Stated at 73 F 10 F 23 C 5 C and less than 70 Diode Test Tesi current
4. attery Read the voltage in the display Good Weak Bad 9V battery gt 8 2V 7 2 to 8 2V lt 7 2V 1 5V battery gt 1 35V_ 1 22 to 1 35V lt 1 22V 8 MN35 V2 0 2 05 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 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 ale 2 ao A WwW e gt Keep the meter dry 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 Handle the meter gently Dropping it can damage the electronic parts or the case Keep the meter clean Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents Use only fresh batteries of the recommended size and type Remove old or weak batteries so they do not leak and damage the unit If the meter is to be stored for a long period of time the batteries should be removed to prevent damage to the unit Test Equipment Depot 99 Washingto
5. current measurements up to 200mA DC set the function switch to the 200mA DC position and insert the red test lead banana plug into the V Q mA jack For current measurements up to 10A DC set the function switch to the 10A DC range and insert the red test lead banana plug into the 10A jack Remove power from the circuit under test then open up the circuit at the point where you wish to measure current 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 Apply power to the circuit Read the current in the display Resistance Measurements 1 2 3 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V Q mA jack Set the function switch to the highest Q position 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 and then set the function switch to the lowest Q position that is greater than the actual or any anticipated resistance Test Equipment Depot 99 Washington Street Melrose MA 02176 781 665 1400 800 517 8431 Fax 781 665 0780 7 MN35 V2 0 2 05 Temperature Measurements WARNING To avoid electric shock disconnect test leads from any source of voltage before making a tempera
6. n Street Melrose MA 02176 781 665 1400 800 517 8431 Fax 781 665 0780 9 MN35 V2 0 2 05 Battery Replacement any source of voltage before removing the battery fuse cover Disconnect the test leads from the meter Remove the rubber holster if in place Remove the two screws securing the rear cover using a Phillips head screwdriver 4 Lift the cover off and replace the battery observing the correct polarity 5 Insert the new battery into the battery holder 6 Replace the rear cover and secure with the screws on Fuse Replacement WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing battery fuse cover Disconnect the test leads from any circuit being measured Remove the rubber holster if in place Remove the two screws securing the rear cover using a Phillips head screwdriver Remove the rear cover 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 Replace the rear cover and secure with the screws On NOS Test Equipment 99 Washington Street Depot Melrose MA 02176 Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 517 8431
7. of 1mA maximum open circuit voltage 2 8V DC typical 4 MN35 V2 0 2 05 Continuity Check Audible signal will sound if the resistance is less than approximately lt 40Q 5Q Temperature sensor Requires type K thermocouple Input Impedance 10M2 VDC and 4 5MQ VAC Display 1999 count LCD Overrange 1 or 1 is displayed Polarity Automatic no indication for positive polarity Minus sign for negative polarity Measurement Rate 3 times per second nominal Low Battery Gs is displayed if battery voltage drops below operating voltage Batteries Requires one 9V battery NEDA 1604 or equivalent Fuses mA range 250mA 250V fast blow 10A range no protection Operating Temp 32 F to 104 F 0 C to 40 C Storage Temp 4 F to 140 F 20 C to 60 C 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 Il Pollution Degree 2 Category II includes local level appliance portable equipment etc with transient overvoltages less than Overvoltage Category Ill Symbols N AC voltage DC direct current or voltage gt Continuity and Diode test mV V millivolt volt voltage Q KQ MQ ohm kilohm megohm resistance yA mA A microamp milli
8. ture measurement Be sure that the thermocouple has been removed before changing to any other measurement function 1 2 3 Insert the type K thermocouple probe into the V Q mA and COM jacks Turn the rotary switch to the F or C position Read the temperature on the display Continuity Measurements 1 N Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V Q mA jack Observe polarity Turn the rotary switch to the Pt position Touch the test probes to the circuit or device under test If the resistance is less than approximately 40Q the buzzer will sound Diode Measurements ty 2 3 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V Q mA jack Turn the rotary switch to the Pt position Touch the test probes to the diode under test Forward voltage will indicate 0 4V to 0 7V Reverse voltage will indicate 1 Shorted devices will indicate near OmV and an open device will indicate 1 in both polarities Battery Test 1 2 3 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack Turn the rotary switch to the 1 5V or 9V BAT position Connect the red test lead to the positive side of the 1 5V or 9V battery and the black test lead to the negative side of the 1 5V or 9V b
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