8-FUNCTION
DIGITAL MULTIMETER
WITH NCV DETECTION
USER’S MANUAL
DMM30
Please read this manual carefully and thoroughly before using this product.
TABLE OF CONTENTS
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
What’s in the Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 –4
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 –6
Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Install Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . 7 – 11
General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Holding Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Measuring AC or DC Voltage . . . . . . . . . . . . . . . . . 7 –8
Measuring DC Current . . . . . . . . . . . . . . . . . . . . . . 8 –9
Measuring Resistance . . . . . . . . . . . . . . . . . . . . . . . . . 9
Checking for Continuity . . . . . . . . . . . . . . . . . . . . 9 – 10
Checking the Integrity of a Diode . . . . . . . . . . . . . . . . 10
Checking Battery Voltage . . . . . . . . . . . . . . . . . . 10 – 11
Using the NCV Detector . . . . . . . . . . . . . . . . . . . . . . . 11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 – 12
Operating & Maintenance Tips . . . . . . . . . . . . . . . . . . . . 13
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . 15
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KEY FEATURES
• 8 functions, 22 ranges
• Measures AC/DC voltage, DC current and resistance
• Also checks continuity, diode integrity and battery voltage
• Non-contact voltage (NCV) detection
• ETL certified safe for CAT II 600V use
• Jumbo 3-1/2 digit (2000 count) LCD with 7/8 in. (22mm) high digits
• Powered by “9V” battery (included)
• Low battery indication • 1-year limited warranty
WHAT’S IN THE PACKAGE
The meter is supplied in a blister pack. A cavity on the blister card
contains a pair of double-insulated test leads. A “9V” battery is
pre-installed in a compartment in the back of the unit.
PRODUCT OVERVIEW
Fig. 1 shows the labels and positions of the controls, LCD and physical
structures of the DMM30. Fig. 2 shows all possible indications on the
LCD. Familiarize yourself with the functions and meanings of all
controls, indications and connectors
before moving on to the Setup
Instructions and Operating Instructions.
1) LCD 2) HOLD button
3) Rotary function switch
4) 10A input jack
5) COM jack
6) jack (for all inputs except
currents >200mADC)
7)
NCV
button
8) NCV detector and visual indication
9) Battery compartment (on back)
10) Flip-up stand (on back)
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Fig. 1. The controls, display and
physical features of the DMM30
1) Low battery indicator
2) Indicates that the displayed
value is a held reading
3) Measured value
4) Negative polarity indicator
SAFETY INSTRUCTIONS
Warning
To avoid possible electric shock or personal injury, and to avoid
damaging the meter or the equipment under test:
• Do not use the meter in any way not detailed in this manual or the
meter's safety features may be compromised.
• Before using the meter, inspect the case. Do not use the meter if it is
damaged. Look for cracks or missing plastic. Pay particular attention
to the insulation around the connectors.
•
WARNING
Inspect the test leads for damaged insulation or
exposed metal. Check the test leads for continuity. Replace damaged
test leads before using the meter.
• Verify the meter’s operation by measuring a known voltage. Do not
use the meter if it operates abnormally. Protection may be impaired.
When in doubt, have the meter serviced.
•
WARNING
Do not apply more than the rated voltage, as marked
on the meter, between the and
COM
jacks or between any jack
and ground. Also do not input more than the rated current, as
marked on the meter, through the
10A
jack.
•
WARNING
Do not measure voltages above 600V in Category II
installations.
•
WARNING
Do not attempt to measure voltage with the rotary
function switch in any or Ω position. Never attempt to measure
current with the rotary function switch in any , or Ω position.
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Fig. 2. All possible
display indications
• Use caution when working with voltages above
42VAC
RMS
, or 60VDC. These voltages pose a shock hazard.
• Use the proper terminals, function and range for all measurements.
•
WARNING
Do not operate the meter around explosive gas, vapor,
or dust.
•
WARNING
When using the probes, keep your fingers behind the
finger guards. Do not touch the metal probes of the test leads when
making a measurement.
• When making connections, connect the black (–) test lead before
connecting the red (+) test lead; when disconnecting, disconnect the
red (+) test lead before disconnecting the black (–) test lead.
• Disconnect circuit power and discharge all high-voltage capacitors
before measuring/testing resistance, continuity, diodes, or
capacitance.
• For all DC functions in both auto and manual ranging mode, to avoid
the risk of shock due to possible improper reading verify the
presence of any AC voltages by first using the AC function. Then
select a DC voltage range equal to or greater than the AC range.
• Before measuring current, turn off power to the circuit before
connecting the meter.
• Do not operate the meter with the case (or part of the case)
removed.
• Use only (1) “9V” battery, properly installed in the battery
compartment, to power the meter. Do not use rechargeable
batteries.
• Replace the battery as soon as the low battery indicator “ ”
appears. Operated with a weak battery, the meter might produce
false readings that could lead to electric shock and personal injury.
• Remove the test leads from the meter before opening the meter
case or battery compartment.
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