Klein Tools MM325 User manual

INSTRUCTION MANUAL
ENGLISH
600V
10A
2M
Ω
• LEAD ALERT
PROTECTION
• DATA HOLD
• AUDIBLE
CONTINUITY
• BATTERY TEST
• DIODE TEST
• AUTO
POWER-OFF
FRANÇAIS p. 25
ESPAÑOL pág. 13
Manual-Ranging
Digital Multimeter
5000573
MM325
CAT III
600V
2m

2
GENERAL SPECIFICATIONS
Klein Tools MM325 is a manual-ranging multimeter that measures
AC/DC voltage, DC current, and resistance. It can also test batteries,
diodes, and continuity.
• Environment: Indoors. DO NOT expose to moisture, rain, or snow.
• Operating Altitude: 6562 ft. (2000m)
• Relative Humidity: <80% non-condensing
• Operating Temp: 32° to 104°F (0° to 40°C)
• Storage Temp: 14° to 140°F (-10° to 60°C)
• Accuracy: Values stated at 65° to 83°F (18° to 28°C)
• Temp Coefcient: 0.1 x (Quoted Accuracy) per °C above 28°C
or below 18°C, corrections are required when ambient working
temp is outside of Accuracy Temp range
• Dimensions: 6.41" × 3.13" × 1.83" (162.7 × 79.4 × 46.6 mm)
• Weight: 8.8 oz. (250 g)
• Calibration: Accurate for one year
• Standards: IEC EN 61010-1, 61010-2-030, 61010-2-033.
IEC EN 61326-1, 61326-2-2.
Conforms to UL STD.61010-1, 61010-2-030, 61010-2-033.
Certified to CSA STD.C22.2 NO. 61010-1, 61010-2-030,
61010-2-033.
• Pollution degree: 2
• Accuracy: ± (% of reading + # of least significant digits)
• Drop Protection: 6.6 ft. (2m)
• Safety Rating: CAT III 600V, Class 2, Double insulation
CAT III: Measurement category III is applicable to test and
measuring circuits connected to the distribution part of the
building’s low-voltage MAINS installation.
Specifications subject to change.
ENGLISH

3
ELECTRICAL SPECIFICATIONS
Function Range Resolution Accuracy
DC Voltage
(V DC)
200.0mV 0.1mV
±(0.5% + 3 digits)2000mV 1mV
20.00V 0.01V
200.0V 0.1V ±(0.8% + 3 digits)
600V 1V
AC Voltage
(V AC)
50 to 60Hz
200.0V 0.1V ±(1.0% + 3 digits)
600V 1V ±(1.2% + 5 digits)
DC Current
(A DC)
200.0μA 0.1μA
±(1.0% + 5 digits)20.00mA 10μA
200.0mA 100μA
10.00A 10mA ±(2.0% + 5 digits)
Resistance
200.0Ω 0.1Ω
±(0.8% + 3 digits)
2000Ω 1Ω
20.00kΩ 0.01kΩ
200.0kΩ 0.1kΩ
2000kΩ 1kΩ ±(1.0% + 3 digits)
Battery Test 9V 10mV ±(1.0% + 2 digits)
1.5V 1mV
• Diode Test: Approx. 1.0mA, open circuit voltage 2.0V DC
• Continuity Check: Audible signal <50Ω
• Battery Test: 9V (approx. 20mA, 450Ω load);
1.5V (approx. 15mA, 100Ω load)
• Sampling Frequency: 2 samples per second
• Overload: "OL" indicated on display, overload protection
600V RMS in all settings
• Polarity: "-" on display indicates negative polarity
• Display: 3 ½ digit, 2000 Count LCD

4
WARNINGS
To ensure safe operation and service of the meter, follow these
instructions. Failure to observe these 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.
• Use only with CAT III or CAT IV rated test leads.
• Probe assemblies to be used for MAINS measurements should
meet EN61010-031 standard, rated CATIII 600V, 10A or better.
• 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 while the probes
are connected.
• Use caution when working with voltages above 25V AC RMS
or 60V DC. Such voltages pose a shock hazard.
• To avoid false readings that can lead to electrical shock,
replace batteries when a low battery indicator appears.
• Do not attempt to measure resistance or continuity on a live
circuit.
• Always adhere to local and national safety codes. Use personal
protective equipment to prevent shock and arc blast injury
where hazardous live conductors are exposed.
SYMBOLS ON METER
AC
Alternating Current
DC
Direct Current
Resistance (in Ohms) Ground
Diode Audible Continuity
Fuse (with rating below symbol) Double Insulated Class II
Backlight Read Instructions
Warning or Caution: To ensure safe operation and service of this
meter, follow all warnings and instructions detailed in this manual.
Risk of Electrical Shock: Improper use of this meter can lead to risk
of electrical shock. Follow all warnings and instructions detailed in
this manual.
SYMBOLS ON LCD
H
Data Hold Audible Continuity
Diode Low Battery
Hazardous Voltage Auto Power-Off
ENGLISH

5
FEATURE DETAILS
1
6
2
7
1. 2000 count LCD display
2. Function selector switch
3. "10A" jack
4. "COM" jack
5. "VΩ" jack
6. "HOLD" (Data Hold) button
7. Backlight button
8. Lead Alert LEDs
NOTE: There are no user-serviceable parts inside meter.
3 54
8

6
ENGLISH
OPERATING INSTRUCTIONS
CONNECTING TEST LEADS
Do not test if leads are improperly seated. Results could cause
intermittent display readings. To ensure proper connection, firmly
press leads into the input jack completely.
INCORRECT
CORRECT
FUNCTION BUTTONS
ON/OFF
Power-ON: Rotate the Function Selector switch
2
from the OFF
setting to any measurement setting.
Power-OFF: Rotate the Function Selector switch
2
to the OFF setting.
Auto Power-OFF: By default, the meter will automatically Power-
OFF after 15 minutes of inactivity. Reactivate meter by pressing any
button. To deactivate the automatic Power OFF feature, power the
meter ON with the "HOLD" button
6
depressed. When automatic
Power OFF is deactivated, the Auto Power-OFF symbol will not
be visible in the display.
HOLD (DATA HOLD)
Press the "HOLD" button
6
to hold the measurement on the display.
Press again to release the display and return to live measuring.
BACKLIGHT
Press and hold the Backlight button
7
for more than one second
to turn the backlight on or off. Backlight automatically turns off
after approximately 3 minutes.
LEAD ALERT LEDs
When the Function Selector switch
2
is rotated to a measurement
setting, the Lead Alert LEDs
8
will illuminate green to ensure that
the test leads are inserted into the appropriate jacks. The lights will
automatically turn off after 2 minutes. To disable the Lead Alert LEDs
8
, power the meter ON while holding the Backlight button
7
.
NOTE: Lead Alert function will reactivate by default when the meter
powers OFF or when the Function Selector switch is rotated.

7
OPERATING INSTRUCTIONS
TESTING IN CAT III / CAT IV MEASUREMENT LOCATIONS
Ensure the test lead shield is pressed firmly in place. Failure to use
the CAT III / CAT IV shield increases arc-flash risk.
TESTING IN CAT II MEASUREMENT LOCATIONS
CAT III / CAT IV shields may be removed for CAT II locations. This
will allow testing on recessed conductors such as standard wall
outlets. Take care not to lose the shields.
0.7" (18 mm)
5/32"
(4 mm)
5/32
(4 mm)
AC VOLTAGE (LESS THAN 600V)
1. Insert RED test lead into VΩ jack
5
, and BLACK test lead into
COM jack
4
, and rotate Function Selector Switch
2
to the
highest V AC ( ) setting (600V).
2. Measure voltage and rotate the Function Selector Switch
to successively lower V AC ( ) settings to obtain higher
resolution measurements.
NOTE: The hazardous voltage indicator will appear for voltages >30V.
NOTE: Do not attempt to measure more than 600V or 200mA.
Red leadBlack lead

8
DC CURRENT 200mA to 10A
1. For DC currents more than 200mA and less than 10A, insert
RED test lead into 10A jack
3
, and BLACK test lead into COM
jack
4
, and rotate Function Selector Switch
2
to the
10A DC setting.
DC VOLTAGE (LESS THAN 600V)
1. Insert RED test lead into VΩ jack
5
, and BLACK test lead into
COM jack
4
, and rotate Function Selector Switch
2
to the
highest V DC ( ) setting (600V).
2. Measure voltage and rotate the Function Selector Switch
to successively lower V DC ( ) settings to obtain higher
resolution measurements.
NOTE: When in a voltage setting and the test leads are open,
readings of order mV may appear on the display. This is noise and
is normal. By touching the test leads together to close the circuit
the meter will measure zero volts.
NOTE: The hazardous voltage indicator will appear for voltages >30V.
NOTE: Do not attempt to measure more than 600V or 200mA.
Red lead Black lead
Red leadBlack lead
ENGLISH

9
OPERATING INSTRUCTIONS
DC CURRENT LESS THAN 200mA
1. For mA DC currents less than 200mA, insert RED test lead into VΩ
jack
5
, and BLACK test lead into COM jack
4
, and rotate Function
Selector Switch
2
to the highest mA DC setting (200mA).
2. To measure current: Remove power from circuit, open circuit at
measurement point, connect meter in-series in the circuit using
the test leads, and apply power to circuit.
NOTE: If measuring mA, the Function Selector Switch
2
may
be rotated to successively lower mA DC settings to obtain higher
resolution measurements.
Red leadBlack lead
Do not attempt to measure more than 10A.
When measuring currents greater than 6A, a measurement
time of 30 seconds followed by 10 minutes of recovery time
is recommended.
RESISTANCE MEASUREMENTS
1. Insert RED test lead into VΩ jack
5
, and BLACK test lead into
COM jack
4
, and rotate Function Selector Switch
2
to the
highest Ω setting (2MΩ).
2. Remove power from circuit.
3. Measure resistance by connecting test leads to circuit and
rotating the Function Selector Switch
2
to successively
lower Ω settings to obtain higher resolution measurements.
NOTE: When in a Resistance setting and the test leads are open
(not connected across a resistor), or when a failed resistor is under
test, the display will indicate O.L. This is normal.
DO NOT attempt to measure resistance on a live circuit.
Red leadBlack lead

10
ENGLISH
DIODE TEST
1. Insert RED test lead into VΩ jack
5
and BLACK test lead into COM
jack
4
, and rotate Function Selector Switch
2
to the setting.
2. Touch test leads to diode. A reading of 200-700mV on display
indicates forward bias, OL indicates reverse bias. An open
device will show OL in both
polarities. A shorted device
will show approximately 0mV.
BATTERY TEST
1. Insert RED test lead into VΩ jack
5
and BLACK test lead into
COM jack
4
, and rotate Function Selector Switch
2
to the 1.5V
or 9V battery test setting.
2. Connect BLACK lead to negative, and RED lead to positive
terminal of battery.
3. Measure voltage on display,
batteries in good condition
should be within approx. 10%
of rated voltage.
Red leadBlack lead
Red leadBlack lead
OPERATING INSTRUCTIONS
CONTINUITY
1. Insert RED test lead into VΩ jack
5
and BLACK test lead into COM
jack
4
, and rotate Function Selector Switch
2
to the setting.
2. Remove power from circuit.
3. Test for continuity by connecting conductor or circuit with test
leads. If resistance is measured less than 100Ω, an audible
signal will sound and display will show a resistance value
indicating continuity. If circuit is
open, display will show "OL".
DO NOT attempt to measure continuity on a live circuit.
Red leadBlack lead