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ENGLISH

FEATURE DETAILS

MM2300A

Instruction Manual

A. 

 Do not attempt to measure more than 1000V.

B. 

 Do not attempt to measure more than 600V on (LOW Z) setting.

C. 

 Do not attempt to measure more than 400mA.

D. 

 Do not attempt to measure more than 10A.

E. 

Auto Power-Off (Apo)

•  Device will power off after 30 minutes non-use.

•  Press the select button to wake.

•  Disabled during Max/Min function.

•  Holding Select button while turning on disables Auto Power-Off.

F. 

Select Functionality Button

•  Switch between AC and DC.

•  Switch between “

Ω

”, “

”, “

”, and “ ”.

•  Switch between Hz and %.

•  Switch between °F and °C.

•  Wake meter during Auto Power Off.

G. 

Relative Reading Mode

•  Press to store current value.

•  Display shows the difference between the stored and live readings.

•  Press again to return to live reading.

H. 

Auto / Manual Range

•  Press repeatedly to cycle through manual ranges.

•  Press for 2 seconds to return to auto ranging mode.

•  AT is displayed on LCD only during auto ranging mode. 

I. 

Max/Min Hold

•  Press to enter Max/Min mode; the largest and smallest values will be 

saved while in this mode.

•  Press repeatedly to alternative between the maximum and minimum 

readings.

•  Press for 2 seconds to return to live reading and clear the stored 

maximum and minimum values.

J. 

Hold/Auto Hold/Backlight

•  Hold captures the current displayed value.

•  Auto Hold captures the first stable displayed value, until a new stable 

value is measured. The meter will then capture the new value and emit 

a beep (V, Ohm, Temperature and Amp functions).

•  Press to hold current input on the display.

•  Press again to enter Auto-Hold to capture stable values.

•  Press again to return to normal operation.

•  Press and hold to activate display backlight.

•  Using lights drains the battery significantly.

K. L.  Battery/Fuse Replacement

•  When  

  indicator is displayed on the LCD, batteries must be replaced.

  indicator is displayed on the LCD, batteries must be replaced.

•  Remove rubber boot, back screw and replace 2 x AAA batteries. 

•  This meter uses 440mA/1000V (69192) and 11A/1000V (69191) 

fast blow fuses.

M.  Magnetic Hanger Accessory 

(Optional, sold separately)

•  Slide magnetic adapter into protective rubber boot.

•  Attach instruments to metal for hands-free use.

N. 

Bar Graph

•  The bar graph shows an approximate analog representation 

of a measurement.

•  The bar graph responds much faster than the digital display.

•  The scale of the bar graph is zero to the maximum reading of 

the selected range.

FUNCTION INSTRUCTIONS

1. 

AC Voltage: <1000V. (Low Z) < 600V 
Features: 

AUTO HOLD

MAX/MIN

RANGE

HOLD

REL

  DO NOT attempt to measure more than 1000V
  DO NOT use (LOW Z) mode at voltages greater than 600V.

•  Use Low Impedance (LOW Z) mode to reduce ghost voltages.

•  Rotate selector to "AC" Voltage position.

•  Attach red lead to “V” input.

2. 

DC Voltage: <1000V. (Low Z) < 600V 
Features: 

AUTO HOLD

MAX/MIN

RANGE

HOLD

REL

4. 

AC/DC Current (small): < 400mA
Features: 

AUTO HOLD

MAX/MIN

RANGE

HOLD

REL

  DO NOT attempt to measure more than 400mA.

•  Attach red lead to “mAμA” input.
•  Select AC or DC current source.

5. Resistance/Diode/Continuity/Capacitance

AUTO/HOLD

0

10

20

30

40

50

60

MM2300A

®

C

E

A

G

F

D

H

J

I

M

L

K

N

B

AUTO/HOLD

0

10

20

30

40

50

60

MM2300

®

5

1

8

3

4

6
7

2

  DO NOT attempt to measure more than 10A.

•  Start with this setting if current level is unknown.
•  Meter will automatically select "A" when red lead is connected to 

"A" input. “

LEAd

” will show if connected but fuse is blown.

3. 

AC/DC Current (large): <10A
Features: 

AUTO HOLD

MAX/MIN

RANGE

HOLD

REL

  DO NOT attempt to measure more than 1000V.
  DO NOT use (LOW Z) mode at voltages greater than 600V.

•  Use Low Impedance (LOW Z) mode to reduce ghost voltages.

•  Rotate selector to "DC" Voltage position.

•  Attach red lead to “V” input.

GENERAL SPECIFICATIONS

The Klein Tools MM2300A is an auto-ranging multimeter. It measures AC/

DC voltage, AC/DC current, resistance, capacitance, frequency, duty cycle, 

and temperature. It can also test diodes and continuity.

• 

Operating Altitude:

 2000 m (6,562 ft.

• 

Relative Humidity: 

<75%

• 

Operating Temperature: 

0°C to 50°C (32°F to 122°F)

• 

Storage temperature: 

-20°C to 60°C (-4°F to 140°F) <80% R.H.

• 

Accuracy Temperature: 

18°C to 28°C (64°F to 82°F)

• 

Temperature Coeffi cient:

 0.1*(specified accuracy)/ °C

• 

Sampling Frequency: 

3 samples per second

• 

Dimensions:

 178 mm x 89 mm x 48 mm (7" x 3.5" x 1.9")

• 

Weight: 

397 g (14 oz.)

• 

Calibration: 

Accurate for one year

• 

Accuracy: 

± (% of r # of least significant digits)

• 

Ingress Protection:

 IP20 Certified

• 

Drop Protection:

 2 m (6.6 ft.)

• 

Safety Rating: 

CAT III 1000V, CAT IV 600V

• 

Electromagnetic Environment:

 EN61326-1:2013 This equipment 

meets requirements for use in basic and controlled electromagnetic 

environments like residential properties, business premises, and 

light-industrial locations.

  Specifications subject to change.

 WARNINGS 

To ensure safe operation and service of the tester, follow these instructions. 

Failure to observe theses warnings can result in severe injury or death.

•  Before each use, verify meter operation by measuring a known 

voltage or current.

•  Never use the meter on a circuit with voltages that exceed the 

category based rating of this meter.

•  Do not use the meter during electrical storms, or in wet weather.
•  Do not use the meter or test leads if they appear to be damaged.
•  Ensure meter leads are fully seated, and keep fingers away from the 

metal probe contacts when making measurements. 

•  Do not open the meter to replace batteries or fuses while the probes 

are connected.

•  Use caution when working with voltages above 60V DC, or 25V AC 

RMS. Such voltages pose a shock hazard.

•  To avoid false readings that can lead to electrical shock, replace 

batteries if a low battery indicator appears.

•  Unless measuring voltage or current, shut off and lock out power 

before measuring resistance or capacitance.

•  Always adhere to local and national safety codes. Use individual 

protective equipment to prevent shock and arc blast injury where 

hazardous live conductors are exposed.

SYMBOLS

AC Alternating Current

Warning or Caution

DC Direct Current

Dangerous levels

DC/AC Voltage or Current

Double Insulated Class II

Ground

PRESS            TO SELECT

  

 Resistance

  

  

  

  

  

  

 Diode

  

  

  

  

  

  

 Continuity

  

 Capacitance

Continuity Features:

MAX/MIN

HOLD

•  Display shows resistance.

•  Buzzer sounds if less than 40Ω

Diode Features:

MAX/MIN

HOLD

Display shows:

•  Forward voltage drop if forward biased.
•  “O.L” if reverse biased.

Resistance Features:

HOLD

REL

RANGE

MAX/MIN

A- HOLD

DO NOT measure resistance on a live circuit.

•  Ω

 = < 60MΩ

PRESS

PRESS

AC
DC

AC
DC

Summary of Contents for MM2300A

Page 1: ...ature Measurement Range Resolution Accuracy 50 to 600 C 0 1 C 1 0 3 0 C 600 to 1000 C 1 C 1 0 3 0 C 58 to 600 F 0 1 F 1 0 5 4 F 600 to 1832 F 1 F 1 0 5 4 F Overload Protection 600V RMS Thermocouple Ac...

Page 2: ...HOLD 0 10 20 30 40 50 60 MM2300 5 1 8 3 4 6 7 2 DO NOT attempt to measure more than 10A Start with this setting if current level is unknown Meter will automatically select A when red lead is connecte...

Page 3: ...ra Rango Resoluci n Precisi n 50 C a 600 C 0 1 C 1 0 3 0 C 600 C a 1000 C 1 C 1 0 3 0 C 58 F a 600 F 0 1 F 1 0 5 4 F 600 F a 1832 F 1 F 1 0 5 4 F Protecci n contra sobrecarga 600 V RMS Precisi n del t...

Page 4: ...m ticamente selecciona A cuando se conecta el cable rojo a la entrada A Aparecer la leyenda LEAd si la unidad est conectada pero el fusible est fundido 3 Corriente CA CD grande 10 A Caracter sticas AU...

Page 5: ...Mesure de la temp rature Plage R solution Pr cision 50 600 C 0 1 C 1 0 3 0 C 600 1000 C 1 C 1 0 3 0 C 58 600 F 0 1 F 1 0 5 4 F 600 1832 F 1 F 1 0 5 4 F Protection contre la surcharge 600 V valeur effi...

Page 6: ...courant c a ou c c 5 R sistance Diode Continuit Capacit AUTO HOLD 0 10 20 30 40 50 60 MM2300 5 1 8 3 4 6 7 2 NE TENTEZ PAS de mesurer des valeurs sup rieures 10 A Si le courant est inconnu d butez la...

Page 7: ...0 bis 1832 F 1 F 1 0 5 4 F berlastungsschutz 600 V RMS Genauigkeit des Thermoelements Nicht angegeben nderungen der technischen Daten vorbehalten Pr fen der Sicherung Bei Auswahl der Funktion A oder m...

Page 8: ...verbunden ist LEAd wird angezeigt falls eine Verbindung besteht aber die Sicherung ge ffnet ist 3 AC DC Strom gro 10 A Funktionen AUTO HOLD MAX MIN RANGE HOLD REL VERSUCHEN SIE NICHT mehr als 1000 V z...

Page 9: ...C 600 tot 1000 C 1 C 1 0 3 0 C 58 tot 600 F 0 1 F 1 0 5 4 F 600 tot 1832 F 1 F 1 0 5 4 F Overspanningsbeveiliging 600V RMS Nauwkeurigheid van thermokoppel Niet opgegeven Specificaties kunnen worden g...

Page 10: ...t NIET meer dan 10A Begin met deze instelling als de stroomsterkte onbekend is De meter selecteert automatisch A als de rode draad is aangesloten op ingang A LEAd wordt weergegeven indien aangesloten...

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