Dawson Tools DDM230C Manuale utente
Dawson DDM230C
True RMS Multimeter with Bar Graph Display
User’s Manual
1
Table of Contents
LIMITED WARRANTY AND LIMITATION
OF LIABILITY...................................................3
Out of the Box.............................................3
Accessories .................................................4
Safety Information......................................4
Certification ................................................8
INTRODUCTION ........................................... 8
Overview.....................................................8
Components and Buttons ...........................9
Components............................................9
Buttons and Symbols ............................10
LCD Display ...........................................11
USING THE METER..................................... 12
Display Hold..............................................12
Switch between Modes ............................12
Relative Measurement .............................13
Max/Min Measurement ...........................13
2
Switch between Functions ........................14
Backlight...................................................14
Auto Off ....................................................14
NCV (Non-Contact Voltage Detector).......14
DC and AC Voltage Measurement ............15
Resistance
.............................................16
Continuity .................................................16
Diode ........................................................16
Capacitance..............................................17
Frequency and Duty Ratio ........................17
Current......................................................17
SPECIFICATIONS ........................................ 18
General Specifications ..............................18
Technical Specifications............................19
MAINTENANCE AND REPAIR ..................... 26
Battery Replacement................................26
Test Leads Replacement ...........................27
CONTACT DAWSON................................... 27
FEATURES...................................... Back Page
3
LIMITED WARRANTY AND
LIMITATION OF LIABILITY
This instrument from Dawson Tools Inc. will be free from defects
in workmanship and material for three years from the date of
original purchase. This warranty does not cover defects resulting
from damage caused by the user such as drops, neglect, misuse,
unauthorized alteration, usage outside of specified conditions,
contamination, or improper repair/maintenance. To receive
service on the instrument if it becomes necessary during the
warranty period, contact your nearest Dawson authorized service
center at (800) 898-6991 or visit www.DawsonTools.com to
obtain a return authorization (within the US only). A return
authorization is necessary before returning any instrument to
Dawson; no service will be provided without a return
authorization. The user is responsible for properly packing the
unit and charges such as shipping, freight and insurance charges.
The extent of Dawson's liability is limited solely to the
repair/replacement of the instrument. The above warranty in its
entirety is inclusive and no other warranties, written or oral, are
expressed or implied.
Out of the Box
Check the Meter and accessories thoroughly before using
the Meter. Contact your local distributor if the Meter or
any components are damaged or malfunction.
4
Accessories
Test Leads
1 pair
9V 6F22 Battery
User’s Manual
1pc
Safety Information
WARNING
TO REDUCE THE RISK OF FIRE, ELECTRICAL SHOCK,
PRODUCT DAMAGE OR PERSONAL INJURY, PLEASE
FOLLOW THE SAFETY INSTRUCTIONS DESCRIBED IN THE
USER MANUAL. READ THE USER MANUALS BEFORE
USING THE METER.
WARNING
TO ENSURE SAFE OPERATION AND LIFE OF THE METER,
DO NOT PLACE THE METER IN ANY ENVIRONMENT WITH
HIGH PRESSURE, HIGH TEMPERATURE, DUST, EXPLOSIVE
GAS OR VAPOR.
5
Avoid shaking, dropping or any kind of
impacts when using or transporting the Meter.
To avoid electric shock or personal injury,
repairs or servicing not covered in this manual
should be performed only by qualified
personnel.
Avoid direct exposure to sunlight to ensure
extended life of the Meter.
Do not place Meter in a strong magnetic field;
this may cause false readings.
Use only the batteries indicated in the
Technical Spec.
Avoid exposing batteries to humidity. Replace
batteries as soon as the low battery indicator
appears.
Please keep the original packing for future
shipping purposes (ex. Calibration)
After opening the box, check for any damage
during delivery.
Check the terminals every time before
operating the Meter. Do not operate the
Meter if the terminals are damaged or one or
more functions are not working properly.
6
Check the test leads before operation. Leads
must be in good condition; check if leads are
well covered by insulator, and if wires are not
exposed.
Use the original test leads included in the
package for best performance and safety. If
necessary, use the compatible leads with
same specifications of the originals’.
Safety Symbols on the Meter
Important safety information, please refers
to the user manual
Earth ground
Indicates compliance with requirements for
double insulation
Important Safety Information
Never use the Meter to measure voltages that
might exceed 600V DC/AC above earth
ground.
In Manual Mode, if the circuit value is
unknown, start the Meter at the maximum
range and then adjust accordingly.
7
Always be careful when working with voltages
above 60V DC or 30V AC RMS. Keep fingers
behind the probe barriers while measuring.
Never connect the Meter leads across a
voltage source while the rotary switch is in
the resistance, diode or continuity mode.
Doing so can damage the Meter.
Inspect test leads and probes for cracks,
breaks or crazes on the insulation before
using the Meter.
Remove the leads from the circuit first before
switching between functions.
Do not power on the circuit when measuring
resistance, capacitance or diodes.
Do not measure the capacitance before the
capacitors are discharged.
Do not operate the Meter near explosive gas,
vapor or under dust.
Stop the operation if the Meter or test leads
appeared damaged or do not function
properly.
Unless the battery cover and the Meter case
are firmly closed, do not use the Meter.
8
Repair or maintenance should be
implemented by trained personnel.
Certification
CAT IV: This meter has meet IEC1010-1
standard with an overvoltage category (600V
CAT IV) and pollution degree 2.
The Meter is compiled to EMC
requirements.
Introduction
Overview
Dawson DDM230C is a portable, hand-held yet
professional meter that features True RMS measurement
display, AC/DC current, AC/DC voltage, Frequency,
Capacitance, Resistance, Continuity, Duty Ratio, and
Diode Testing. This Meter is easy to use even with one
hand, suitable for professional users or amateurs, and
ideal for school or home use.
9
Components and Buttons
Components
1. NCV LED Indicator
2. LCD Display
3. Buttons
4. Function Rotary Switch
5. Input
6. Voltage Sensing Area.
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