99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Back to the Extech MN35/36 Product Page
User’s Manual
MiniTecTM Series
Model MN35
Manual Ranging Mini 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
Safety Precautions
1. Improper use of this meter can cause damage, shock, injury or death.
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
5. Do not exceed the maximum rated input limits.
6. Use great care when making measurements if the voltages are greater
7. Always discharge capacitors and remove power from the device under
8. Remove the battery from the meter if the meter is to be stored for long
9. To avoid electric shock, do not measure AC current on any circuit
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
Read and understand this user manual before operating the meter.
damage before operating the meter. Repair any damage before use.
than 25VAC rms or 35VDC. These voltages are considered a shock
hazard.
test before performing Diode, Resistance or Continuity tests.
periods.
whose voltage exceeds 250V AC.
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.)
Input Limits
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MN35 V2.0 2/05
Specifications
Function Range Accuracy
DC Voltage (V DC)
(40 - 400Hz)
DC Current (A DC)
Resistance
Temp °F
Temp °C
Accuracy Stated at 73
Diode Test Test current of 1mA maximum, open circuit voltage
200.0mV
2.000V
20.00V
200.0V
600V
200.0V AC Voltage (V AC)
600V
200.0mA
10.00A
200.0Ω ±(0.8% reading + 4 digits)
2.000kΩ
20.00kΩ
200.0kΩ
20.00MΩ ±(3.0% reading + 3 digits)
-4 to 1400°F
-20 to 750°C
RH
2.8V DC typical
±(0.5% reading + 2 digits)
±(0.8% reading + 2 digits)
±(1.2% reading + 10 digits)
±(1.5% reading + 2 digits)
±(3.0% reading + 5 digits)
±(0.8% reading + 2 digits)
-4 to 59°F; ±(2.5% reading + 19 digits)
60 to 750°F ±(1.0% reading + 9 digits)
751; to 1400°F; ±(2.5% reading + 19
digits)
-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)
oF
±10oF (23oC ±5 oC) and less than 70%
4
MN35 V2.0 2/05
Continuity Check Audible signal will sound if the resistance is less than
approximately <40Ω ± 5Ω
Temperature sensor Requires type K thermocouple
Input Impedance 10MΩ (VDC) and 4.5MΩ (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 “ ” 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
Storage Temp -4
o
F to 104oF (0oC to 40oC)
o
F 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.
Symbols
AC (voltage)
•))) Continuity and Diode test
mV, V millivolt, volt (voltage)
Ω, kΩ, MΩ ohm, kilohm, megohm (resistance)
µA, mA, A microamp, milliamp, Amp (current)
º
F, ºC Degrees fahrenheit, centigrade (temperature)
º
Low battery
HOLD Display hold
DC (direct current or voltage)
5
MN35 V2.0 2/05
Meter Description
1. LCD Display
2. Hold button
3. Function switch
4. COM jack
5. 10A jack
6. Positive jack
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.
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 200mA DC position and insert the red test lead banana plug into
the V/Ω/mA jack.
3. 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.
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.
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 V/Ω/mA jack.
2. Set the function switch to the highest 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 and then set the function switch to
the lowest Ω 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 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 V/Ω/mA and COM jacks.
2. Turn the rotary switch to the
o
F or oC position.
3. Read the temperature on the display.
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 40Ω 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 “1. ”. Shorted
devices will indicate near 0mV and an open device will indicate “1. ”
in both polarities.
Battery Test
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 1.5V or 9V BAT position.
3. 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 battery.
4. Read the voltage in the display.
Good Weak Bad
9V battery: >8.2V 7.2 to 8.2V <7.2V
1.5V battery: >1.35V 1.22 to 1.35V <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.
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.
Test Equipment Depot, 99 Washington Street, Melrose, MA 02176
781.665.1400 | 800.517.8431 | Fax: 781.665.0780
9
MN35 V2.0 2/05
Battery Replacement
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. 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.
Fuse Replacement
WARNING: To avoid electric shock, disconnect the test leads from
any source of voltage before removing battery/fuse cover.
1. Disconnect the test leads from any circuit being measured.
2. Remove the rubber holster (if in place).
3. Remove the two screws securing the rear cover using a Phillips head
screwdriver. Remove the rear cover.
4. Remove the old fuse by gently pulling up on it.
5. Install the new fuse by gently pushing it into the holder.
6. Always use a fuse of the proper size and value; 250mA/250V fast blow.
7. Replace the rear cover and secure with the screws.
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Back to the Extech MN35/36 Product Page
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