UTL33
INSTRUCTION MANUAL
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• Read the safety precautions associated with the equipment being
tested and seek assistance or advice when performing
unfamiliar tasks.
• Keep your fingers away from the test lead metal probe
contacts
and bus-bars when making measurements. Always grip the
instrument and test-leads behind the hand guards (molded into
the probes).
• In the event of electrical shock, ALWAYS bring the victim
to
the emergency room for evaluation, regardless of the victim’s
apparent recovery. Electrical shock can cause an unstable heart
rhythm that may need medical attention.
International Symbols
C o n t r ols and Indicators
1. Display: 3 - 1/2 digit, 7 segment, 15 mm high LC D .
2. Back Light: (option) Push this button to turn on the back light.
3. Rotary Switch: This switch is used to select functions and desired
ranges as well as to turn on/off the meter.
4. Hold Button: When this button is pushed, the display will keep the
last reading and “ “ symbol will appear on the LCD until pushing
it again.
5. “10A” Jack: Plug in connector for red test lead for
10A measurement.
6. “COM” Jack: Plug in connector for black (negative) test lead.
7. “VΩmA” Jack: Plug in connector for red (positive) test lead for
voltage, resistance and current (except 10A) measurements.
Introduction
The UTL33 is a full featured digital multimeter. It has the measurement
functions (including temperature) needed to help technicians successfully
troubleshoot, repair and verify appliance opera t i o n .
Features include
• AC Voltage 200V/600V
• DC Voltage 200m/V/2V/20V/200V/600V
• DC current 200µA/2mA/20mA/200mA/10A
• Resistance 200Ω/2kΩ/20kΩ/200kΩ/200MΩ
• Audible continuity
• Data hold
• Impact resistant boot with a tilt stand
• Compact pocket-design fits easily in tight spaces
Safety Notes
Before using this meter, read all safety information carefully. In
this manual the word "WARNING" is used to indicate conditions
or actions that may pose physical hazards to the user. The word
"CAUTION" is used to indicate conditions or actions that may
damage this instrument.
WARNING!
Exceeding the specified limits of this meter is dangerous and can
expose the user to serious or possibly fatal injury.
• DO NOT attempt to measure any voltage that exceeds 600
volts
with this meter - UEi offers numerous alternatives for measuring
high voltage and current
• Voltages above 60 volts DC or 30 volts AC may constitute
a
serious shock hazard
• DO NOT attempt to use this meter if either the meter or the
test
leads have been damaged. Send unit in for repair by a qualified
repair facility
• Test leads must be fully inserted prior to taking measurements
• Always turn off power to a circuit (or assembly) under test
before
cutting, unsoldering or breaking the current path. Even small
amounts of current can be dangerous
• Always disconnect the live test lead before disconnecting
the
common test lead from a circuit
• When measuring high voltage, disconnect the power source
before
making test lead connections. Connect the test leads to the meter
first then to the circuit under test. Reapply power
• If any of the following indications occur during testing,
turn
off the power source to the circuit under test:
• Arcing
• Flame
• Smoke
• Extreme Heat
• Smell of Burning Materials
• Discoloration or Melting of Components
UTL33-MAN P
. 1
H
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AC Voltage Measurement
1. Connect the red test lead to the “VΩmA” jack and the black
lead
to the “COM” jack.
2. Set the rotary switch at desired AC V position.
3. Connect test leads across the source or load being
measured.
4. Read voltage value on the LCD display.
Resistance Measurement
1. Connect the red test lead to the “VΩmA” jack and the black
lead
to the “COM” jack (The polarity of red lead is positive “+”).
2. Set the rotary switch at desired AC V position.
3. Connect test leads across the resistor to be measured and
read
LCD display.
4. If the resistance being measured is connected to a circuit, turn
off
power and discharge all capacitors before applying test probes.
Diode Test
1. Connect the red test lead to the “VΩmA” jack and the black
lead
to the “COM” jack (The polarity of red lead is positive “+”).
2. Set the rotary switch at “ “ position
3. Connect the red test lead to the anode of the diode to be
tested
and the black test lead to the cathode of the diode. The approx.
forward voltage drop of the diode will be displayed. If the
connection is reversed, only figure “1” will be shown.
Transistor Test
1. Set the rotary switch to “hFE” position.
2. Determine whether the transistor under testing is NPN or PNP
and
locate the emitter, base and collector leads. Insert the leads into
proper holes of the “hFE” socket on the front panel.
3. Read the approximate “hFE” value at the test condition of
base
current 10µA and Vce 3V.
NOTE: To avoid electrical shock, remove test leads from measurement
circuits before testing a transistor.
Audible Continuity Test
1. Connect the red test lead to the “VΩmA” jack and the black
lead
to the “COM” jack.
2. Set the rotary switch at “ “ position
3. Connect test leads to two points of circuit
to be tested. If continuity
exists, built-in buzzer will sound.
Operating Instructions
DC Voltage Measurement
1. Connect the red test lead to the “VΩmA” jack and the black
lead
to the “COM” jack.
2. Set the rotary switch to the desired DC V position. If the voltage
to
be measured is not known beforehand, set range switch to the
highest range position and then reduce it until satisfactory
resolution is obtained.
3. Connect test leads across the source or load being measured.
4. Read voltage value on the LCD display along with the polarity
of
the red lead connection.
DC Current Measurement
1. Connect the red test lead to the “VΩmA” jack and the black
lead
to the “COM” jack (For measurements between 200 mA and 10A,
remove red lead to “10A” jack).
2. Set the rotary switch to the desired DC A position.
3. Open the circuit in which the current is to be measured,
and
connect test leads in series with the circuit.
4. Read current value on LCD display along with the polarity of red
lead connection.
UTL33-MAN P
. 2
4
1
2
BACK LIGHT
3
5
6
7
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S p e c i f i c a t i o n s
Accuracy is specified for a period of one year after calibration and at 64˚
to 82˚F (18˚ to 28˚C) with relative humidity to 80%.
DC Voltage
Overload protection: 250V rms. For 200 mV range and 600V DC or rms.
AC for other ranges.
DC Current
Overload protection: F 200 mA/250V fuse. (10A range unfused)
AC Voltage
Overload protection: 600V DC or rms. AC for all ranges.
Frequency range: 40Hz to 400Hz.
Response: Average responding, calibrated in rms. of a sine wave.
M a i n t e n a n c e
Periodic service
WARNING!
Repair and service of this instrument is to be performed by qualified
personnel only. Improper repair or service could result in physical
degradation of the meter. This could alter the protection from
electrical shock and personal injury this meter provides to the
operator. Perform only those maintenance tasks that you are
qualified to do.
These guidelines will help you attain long and reliable service from
your meter:
1. Calibrate your meter annually to ensure it meets
original
performance specifications.
2. Keep your meter dry. If it gets wet, wipe it dry immediately. Liquids
damage electronic circuits.
3. Whenever pra c t i cal, keep the meter away from dust and dirt, which
can cause premature wear.
4. Although your meter is built to withstand the rigors of daily use, it
can be damaged by severe impacts. Use reasonable caution when
using and storing the meter.
Cleaning and Decontamination
Periodically clean your meter’s case using a damp cloth. DO NOT use
abrasives, cleaning solvents or strong detergents, as they may damage
the
finish or affect the reliability of the structural components.
Battery and Fuse Replacement
If “ “ appears on display, it indicates that the battery should be
replaced. Always use a fresh replacement battery of the specified size
and type. Immediately remove the old or weak battery from the meter
and dispose of it in accordance with your local disposal regulations. Old
or defective batteries can leak chemicals that corrode electronic circuits.
To replace battery and fuse (200mA/250V) remove the 2 screws in the
bottom of the case. Simply remove the old, and replace with a new one.
WARNING!
To avoid electric shock, be sure to turn off the meter’s power and
disconnect both test leads from any equipment before you remove
or install batteries.
UTL33-MAN P
. 3
Maximum voltage between CAT II 600V
terminals and earth ground
Fuse protected F 200mA/ 250V
Power 9V battery, NEDA 1604 or 6F22
Display LCD, 1999 counts, updates 2-3/ sec
Measuring method Dual-slope integration A/D converter
Over range indication Only figure “1” on the display
Polarity indication “-” displayed for negative polarity
Operating environment 0˚ to 40˚C
Storage temperature -10˚ to 50˚C
Low battery indication “ “ appears on the display
Size 138 x 69 x 31 mm
Weight Approx. 170g
Range Resolution Accuracy
200 mV 100 µV ±0.5% of reading ±2 digits
2 V 1 mV
20 V 10 mV
200 V 100 mV
600 V 1 V ±0.8% of reading ±2 digits
Range Resolution Accuracy
200 µA 0.1 µA ±1% of reading ±2 digits
2 mA 1 µA
20 mA 10 µA
200 mA 100 µA ±1.5% of reading ±2 digits
10 A 10 mA ±3% of reading ±2 digits
Range Resolution Accuracy
200 V 100 mV ±1.2% of reading ±10 digits
600 V 1 V
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AC Voltage
Overload protection: 250V DC or rms. AC.
Resistance
Maximum Open Circuit Voltage: 3.2V
Overload Protection: 250V DC or rms. AC for all ranges.
Transistor “hFE” Test (0-1000)
UTL33-MAN P
. 4
Range Description
If continuity exists (about less than 1.5k), built-in buzzer
will sound.
Show the approx. forward voltage drop of the diode.
Range Resolution Accuracy
200 Ω 0.1 Ω ±0.8% of reading ±3 digits
2 kΩ 1 Ω ±0.8% of reading ±2 digits
20 kΩ 10 Ω
200 kΩ 100 Ω
600 MΩ 1 kΩ ±1.0% of reading ±2 digits
Range Test Range Test Current Test Voltage
NPN & PN P 0-1000 lb=10 µA Vce=3V
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UTL33
Digital Multimeter
Copyright © 2007 UEi UTL33-MAN 4/07
PLEASE
RECYCLE
Limited Warranty
The UTL33 is warranted to be free from defects in materials and workmanship for a period of
one year from the date of purchase. If within the warra n ty period your instrument should
become inoperative from such defects, the unit will be repaired or replaced at UEi’s option.
This warra n ty covers normal use and does not cover damage which occurs in shipment or
failure which results from alteration, tampering, accident, misuse, abuse, neglect or improper
maintenance. Batteries and consequential damage resulting from failed batteries are not
covered by warra n ty.
Any implied warranties, including but not limited to implied warranties of merchantability
and fitness for a particular purpose, are limited to the express warranty. UEi shall not be
liable for loss of use of the instrument or other incidental or consequential damages,
expenses, or economic loss, or for any claim or claims for such damage, expenses or
economic loss. A purchase receipt or other proof of original purchase date will be required
before warra n ty repairs will be rendered. Instruments out of warra n ty will be repaired (when
r e p a i rable) for a service charge.
UTL is distributed by UEi
This warranty gives you specific legal rights. You may also have other rights which vary from
state to state.
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