1-800-547-5740 • Fax: (503) 643-6322
www.ueitest.com • email: info@ueitest.com
DL297T
INSTRUCTION MANUAL
Introduction
The DL297T is an autoranging, true RMS digital multimeter that’s
packed full of functions, features, and outstanding value. This meter is
unbeatable for portable power generator maintenance and electrical
troubleshooting. Use temperature and frequency functions along with
the process monitoring features to take on those tasks that you face
daily in your technologically advanced workplace.
Features include
• 1000 V DC / 750 V AC
• UL and CE listed
• Measures volts, amps, resistance, temperature, frequency
and continuity
• Compare mode (CMP) for quick Go/No-Go tests
• HI/LO allows you to quickly recall upper and lower limits
• Relative mode (REL) displays change of value
• Record mode stores minimum, maximum and average
values for 24 hours
• Hold features freezes the data on the display
• Fast responding analog bar-graph
• Low battery indicator and auto power-off with manual overdrive
• Ruggedized to withstand a ten foot drop
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.
• Always follow industry standard safety practices including protective
clothing, gloves and safety glasses when appropriate
• Do not attempt to measure any voltage that exceeds the
ca t e g o ry b ased rating of this meter
• Do not attempt to use this meter if either the meter or the test
leads have been damaged. Turn it in for repair at a qualified
repair facility
• Ensure meter leads are fully seated by making a quick continuity
check of the leads prior to making voltage measurements
• Keep your fingers away from the test lead’s metal probe
contacts when making measurements. Always grip the leads behind
the finger guards molded into the probes
• Use a current clamp adapter when measuring current that may
exceed 10 amps. See the accessories in UEi’s full-line ca t a l o g
• Do not open the meter to replace batteries or fuses while the
probes are connected
WARNING!
Exceeding the specified limits of this meter is dangerous and can
expose the user to serious or possibly fatal injury.
• DO NOT try to measure any voltage that exceeds 1000 DC or
750 AC volt peak
• Voltages above 25 volts AC or DC may constitute a
serious shock hazard
• 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
• 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
• Higher voltages and currents require greater awareness of
physical safety hazards - Before connecting the test leads; turn
off power to the circuit under test; set the meter to the desired
function and range; 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
CAUTION!
Do not attempt to remove the meter leads from the circuit under test.
The leads, the meter, or the circuit under test may have degraded to
the point that they no longer provide protection from the voltage and
current applied. If any of these erroneous readings are observed,
disconnect power immediately and recheck all settings and connections
International Symbols
DL297T-MAN P. 1
Operating Instructions
Disabling the Auto Power Off Function
To disable the auto power off function for long-term measurements,
turn the meter on while holding down the “HOLD” push-button. Auto
power-off will be disabled until the meter is manually turned off.
“CMP” Mode
Set the function and range switch to the desired location and turn
on the meter. Depress the “CMP” push-button. You are now in the
compare mode.
Now press the “EDIT” push-button. The “1” at the right side of the
LCD will begin to blink and the arrow at the right of the bar graph will
come on. This indicates that the value you put in will be the highest
acceptable reading. Using the arrow push-buttons found on the “CMP,
REL, % and REC” buttons, enter the HI value that you want your
readings to be compared to.
Once the value is entered, press the “HI/LO” push-button. Now the
arrow at the left of the bar graph will come on. This indicates that the
value you put in will be the lowest acceptable reading. Using the
arrow push-buttons, enter the LO value that you want your readings
compared to.
Press the “EDIT” push-button to exit the mode. From this point on, all
readings will be compared to the stored values and displayed on the
LCD in one of three ways:
• “LO” - The reading is lower than the LO stored value
• “PASS” - The reading is between the stored values
• “HI” - The reading is higher than the HI stored value
“REL” Mode
Set the function and range switch to the desired location. In the “REL”
mode, the meter displays the difference between the stored value and
the measured value.
Turn on the meter and press the “REL” push-button. “REL” will appear
on the LCD and the bar graph pointer will be positioned at the center of
the scale.
Press the “EDIT” push-button to exit the mode.
All measurements will be displayed as the difference between the stored
value and the measured value. Negative readings are lower than the
stored value. Positive readings are higher than the stored value. Pushing
the “REL” button again exits the mode.
“%” Mode
Set the function and range switch to the desired location. In the “%”
mode, the meter displays the difference in percentage between the
stored value and the measured value.
Turn the meter on and press the “%” push-button. The “%” sign will
appear on the LCD and the bar graph pointer will be positioned at zero
on the scale.
Press the “EDIT” push-button. Using the arrow buttons, enter the value
you want the readings displayed as a percentage of. Once the value is
entered, press the “EDIT” push-button to exit the mode.
C o n t rols and Indicators
1. Digital Display: Readings are displayed on a 4-4/5 digit,
50,000 count (primary display) and 5,000 count
(secondary display).
2. “CMP”, “REL” and “%” Push-buttons: These three functions
allow you to evaluate a stored reference value or values in the
meter by comparing “CMP” or in relation to “REL” or as a
percentage “%”.
3. REC Push-button: Function allows you to record minimum,
maximum and average values for a series of measurements on
the same function and range.
4. RANGE Push-button: Puts the meter in manual range mode.
holding it down for two seconds exits this mode.
5. Hold Push-buttons: Freezes the reading on the LCD for all
functions and ranges.
6. ON/OFF Push-buttons: Turns the meter on and off. If the rotary
switch or a push-button is not activated within 30 minutes, the
meter automatically turns itself off.
7. A Input Jack: The red test lead is plugged into this jack for
measuring current on the 10 AC or DC amp functions.
8. mAµA Input Jack: The red test lead is plugged into this jack for
measuring current on the 4m and 400m AC or DC amp functions.
9. VΩHz Input Jack: The red test lead is plugged into this jack for
all AC V, DC V, Ohm, Continuity Buzzer, and Diode test functions.
10. COM Input Jack: The black test lead is plugged into this jack for
all measurements except temperature.
6
DM397-MAN P. 2
7
2
3
4
5
1
8
9
10
All measurements will be displayed as the difference in percentage
between the stored value and the measured value. Negative readings
are lower than the stored value. Positive readings are higher than the
stored value. Pushing the “%” button again exits the mode.
“REC” Mode
This function allows you to record minimum, maximum and average
values for a series of measurements on the same function and range.
Set the function and range switch to the desired location and turn
on the meter. Press the “REC” push-button. “REC” will appear on
the display.
The meter will beep every time a new maximum or minimum value is
recorded. Press the “REC” button to scroll through the stored minimum,
maximum and average values. This meter can only record in this mode
for 24 hours.
Hold the “REC” button for two seconds to exit this mode.
Disabling the Beeper
Hold down the “REC” push-button while turning on the meter.
Changing the Temperature Function from ˚C to ˚F
Set the meter to ˚C mode. Hold down the “%” push-button while
turning the meter on. ˚F will appear on the LCD.
Measuring DC Volts
WARNING!
To avoid the risk of electrical shock, instrument damage and/or
equipment damage, input voltages must not exceed 1000 V DC.
Do not attempt to take any unknown voltage measurement that may
be in excess of 1000 V DC.
1. Set function switch to the desired DC V range. If you do not know
the value of the voltage to be measured, always start with the
highest range and reduce the setting as required to obtain a
satisfactory reading.
2. Plug the red test lead into the “VΩ” input jack and the black lead
into the “COM” input jack of instrument.
3. Disconnect the power from the circuit to be tested.
4. Connect the test leads to the circuit to be tested.
5. Reapply power to the circuit. The measured voltage will appear on
the display of the instrument.
6. If the red test lead is connected to the negative (or lower voltage)
side of the circuit, a minus sign will appear on the left side of
the display.
7. Disconnect power to the circuit before removing test leads from
the circuit.
Maximum Input: 1000 DC V
Measuring AC Volts
WARNING!
To avoid the risk of electrical shock, instrument damage and/or
equipment damage, input voltages must not exceed 750 V peak AC.
Do not attempt to take any unknown voltage measurements that may
be in excess of 750 V peak AC .
1. Set function switch to the desired AC V range. If you do not know
the value of the voltage to be measured, always start with the
highest range and reduce the setting as required to obtain a
satisfactory reading.
2. Plug the red test lead into the “VΩ” input jack and the black lead
into the “COM” input jack of instrument.
3. Disconnect the power from the circuit to be tested.
4. Connect the test leads to the circuit to be tested.
5. Reapply power to the circuit. The measured voltage will appear on
the display of the instrument.
6. Disconnect power to the circuit before removing test leads from
the circuit.
Maximum Input: 750 AC V peak
Measuring DC Current (amps)
CAUTION!
The current functions are protected by a fuse of 600 volt rating. To
avoid damage to the instrument, current sources having open circuit
voltages greater than 600 volts DC or peak AC must not be measured.
NOTE: When taking current measurements, the meter must be
connected in SERIES with the circuit, or circuit element under test.
Never connect the test leads across a voltage source (in parallel).
This can cause damage to the circuit under test or to the meter.
DL297T-MAN P. 4
Function Range Resolution Accuracy
400 mV 100 µV ±0.3% of reading, ±2 digits
4 V 1 mV ±0.3% of reading, ±1 digit
DC V 40 V 10 mV
400 V 0.1 V
1000 V 1 V ±0.75% of reading, ±3 digits
Function Range Resolution 50-60Hz 45Hz-1KHz 1-10KHz 10-30KHz
4 V 1 mV ±2.5% of NA NA
40 V 10 mV ±0.75% reading
AC V 400 V 0.1 V +3 digits ±5 digits ±2.5% of reading
750 V 1 V ±5 digits
1. Set function switch to the desired DC A range. If you do not know
the value of the voltage to be measured, always start with the
highest range and reduce the setting as required to obtain a
satisfactory reading.
2. Plug the red test lead into the “A” input jack and the black lead
into the “COM” input jack of instrument.
3. Disconnect the power from the circuit to be tested.
4. Connect the test leads to the circuit to be tested.
5. Reapply power to the circuit. The measured voltage will appear on
the display of the instrument.
6. Disconnect power to the circuit before removing test leads from
the circuit.
NOTE: “ µ A” and “mA” ra n g es are protected by a 2 amp, 600 volt fuse
“A” range is protected by a 15 amp, 600 volt fuse
Measuring AC Current (amps)
CAUTION!
The current functions are protected by a fuse of 600 volt rating. To
avoid damage to the instrument, current sources having open circuit
voltages greater than 600 volts DC or peak AC must not be measured.
NOTE: When taking current measurements, the meter must be
connected in SERIES with the circuit, or circuit element under test.
Never connect the test leads across a voltage source (in parallel).
This can cause damage to the circuit under test or to the meter.
1. Set function switch to the desired AC A range. If you do not know
the value of the voltage to be measured, always start with the
highest range and reduce the setting as required to obtain a
satisfactory reading.
2. Plug the red test lead into the “A” input jack and the black lead
into the “COM” input jack of instrument.
3. Disconnect the power from the circuit to be tested.
4. Connect the test leads to the circuit to be tested.
5. Reapply power to the circuit. The measured voltage will appear on
the display of the instrument.
6. Disconnect power to the circuit before removing test leads from
the circuit.
NOTE: “ µ A” and “mA” ra n ges are protected by a 2 amp, 600 volt fuse
“A” range is protected by a 15 amp, 600 volt fuse
Measuring Resistance (ohms, continuity)
CAUTION!
Turn off power and discharge all capacitors on circuit to be tested
before attempting in-circuit resistance measurements. Failure to do so
may end up in equipment or instrument damage.
The resistance measuring circuit applies a know value of constant
current through the unknown resistance and then measures the voltage
developed across it. Therefore, remove all power to the circuit under
test when making resistance measurements. If any voltage is present in
the test circuit, an erroneous reading will result. The meter may be
damaged if voltage excess of 600 V AC is present.
NOTE: When measuring critical low ohm values, touch tips of test
leads together and record the reading. Subtract this reading from
any additional measurement to obtain the most accurate value.
1. Set the function switch to the desired “Ω” position.
2. Insert the black test lead into the “COM” input jack and the red
test lead into the “VΩHz” input jack.
3. Connect the test leads to the circuit to be measured.
4. The measured resistance will appear on the display.
DL297T-MAN P. 5
Function Range Resolution Accuracy
400 0.1 µA ±0.5% of reading, ±1 digit
4000 1 µA
40 0.01 mA
4000 0.001 A
10 0.01 ±1.0% of reading, ±5 digits
µA
mA
A
Function Range Resolution Accuracy
400 0.1 µA ±1.0% of reading, ±5 digit
4000 1 µA
40 0.01 mA
4000 0.001 A
10 0.01
µA
mA
A
Function Range Resolution Accuracy
400 0.1 Ω ±0.5% of reading, ±10 digit
4 K 1 Ω ±0.5% of reading, ±3 digit
Ω 40 K 10 Ω
400 K 0.1 Ω
4 M 1 KΩ
40 M 10 KΩ ±1.0% of reading, ±10 digit
Audible Continuity Buzzer
1. Set the function switch to the “ “ position.
2. Insert the black test lead into the “COM” input jack and the red
test lead into the “VΩHz“ input jack.
3. Connect the test leads to the circuit to be tested.
4. The meter will emit a continuous tone for resistances of less
than 100 ohms.
Diode Test
1. Set the function switch to the “ “ position.
2. Insert the black test lead into the “COM” input jack and the red
test lead into the “VΩHz“ input jack.
3. Touch the red test lead to the Anode (+ side, non-banded end)
and the black test lead to the Cathode (- side, banded end).
4. If the diode is good, the reading should indicate 0.3 to 0.8 on the LC D .
5. Reverse the red and black leads on the diode. If the LCD reads
“OFL” (the overload sign), the diode is good.
NOTE: A defective diode will read “OFL” (the overload sign) or
“0.00” no matter how the test leads are connected.
Microwave Diodes
Most microwave diodes cannot be tested by a DMM with a diode test
function. This is because the meter does not supply enough power to
turn these diodes on. UEi offers an accessory test lead (model ATL60)
that boosts the power output so that microwave diodes can be
adequately tested.
Measuring Frequency
1. Set the function switch to the “Hz“ position.
2. Insert the black test lead into the “COM” input jack and the red
test lead into the “VΩHz“ input jack.
3. Connect the test leads to the circuit to be measured.
4. The meter will display the frequency measured.
Maximum Input: 500 DC V RMS
Measuring Temperature
1. Set the function switch to the “˚C“ position.
2. Plug a K-type thermocouple probe (not included, consult
distributor for proper model for application) into the socket on
the instrument, observing the proper polarity.
3. Turn on the meter.
NOTE: This instrument automatically defaults to the Centigrade
(˚C) scale. To measure in Fahrenheit (˚F), hold down the “%”
push-button before turning on the meter.
4. The temperature reading appears on the LCD display.
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:
• Calibrate your meter annually to ensure it meets original
performance specifications
• Keep your meter dry. If it gets wet, wipe dry immediately.
Liquids can degrade electronic circuits
• Whenever practical, keep the meter away from dust and dirt
that can cause premature wear
• 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
Periodically clean your meter’s case using a damp cloth. DO NOT use
abrasive, flammable liquids, cleaning solvents, or strong detergents as
they may damage the finish, impair safety, or affect the reliability of the
structural components.
Clean the input terminals as follows:
1. Turn the meter off and remove all test leads.
2. Shake out any dirt that may be in the terminals.
3. Soak a new swab with alcohol and work the swab around in
each terminal.
DL297T-MAN P. 6
Function Range Resolution Accuracy
Hz 20 KHz 1 Hz ±0.2% of reading, ±2 digits
200 KHz 10 Hz (2,000 counts)
Function Resolution Accuracy
-40˚ to 2498˚F 1˚F ±(5.5˚F + 1 digit) from -4˚ to 570˚F
±3.0% of reading for all other temperatures
-40˚ to 1370˚C 1˚C ±(3.0˚C + 1 digit) from -20˚ to 300˚C
±3.0% of reading for all other temperatures
To Measure AC or DC Current
1. Turn off power to the circuit and discharge all high-voltage ca p a c i t o r s .
2. Insert the black lead into the “COM” terminal and the red lead
into an input terminal appropriate for the measurement range.
NOTE: To avoid blowing the meter’s 440mA fuse, use the mAµA
terminal only if you are sure that the current is less than 400mA. It is
best to start in the higher ra n ge when unsure to take the initial
m e a s u r ement. 400mA is displayed as 0.4000A in the 5.000A ra n ge .
3. Open the circuit path to be tested.
4. Touch the red lead to the more positive side of the break and the
black lead to the more negative side. (Reverse connections will
only display a negative reading for DC current, but will not
damage the meter).
5. Turn on the power to the circuit and read the display.
6. After measuring the current, turn off power to the circuit and
discharge all high-voltage capacitors.
7. Disconnect the meter and restore the circuit to normal operation.
Wrong Input Warning Feature
If the display shows “L EA d” or “FUSE”, be sure the meter is set up
correctly and test the meter’s fuses as described under Auto Fuse
D e t e c t i o n. If the rotary switch is not correctly set to one of the current
measuring positions, the beeper warns you by making a chirping sound.
This warning is intended to stop you from attempting a measurement other
than current when the test leads are plugged into a current terminal.
Placing the probes in parallel with a powered circuit when the leads are
plugged into a current terminal can damage the circuit you are testing and
b l ow the meter’s fuses. This is due to the fact that in the current range the
resistance through the amps terminals is low, and the meter acts like a
short to your circuit.
Auto/Manual Range Operation
Press the “RANGE” push-button momentarily to select manual and the
meter will stay in the range it is in when the LCD icon “AUTO” turns off.
Press the button momentarily again to step through the ranges. Press
and hold the “RANGE” push-button for two seconds or more to
resumes auto ranging.
Auto Power Off
The auto power off feature has two steps. The first step has the meter
automatically go to the power saving mode to extend the battery life
after approximately 15 minutes with no activity. When the meter enters
this mode, the meter beeps waring tones every minute. To turn on the
meter, press any button or move the rotary switch to any position. The
second step is to automatically turn the meter completely off. This
occurs approximately 15 minutes after the meter entered the power
saving mode. To turn the meter back on after a complete power off you
must rotate the selector to OFF, and then to the required range.
You can disable auto power off by using the setup menu. Both the auto
off time and the power saving mode beep alert time can be adjusted
from the setup menu.
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:
• Calibrate your meter annually to ensure it meets original
performance specifications
• Keep your meter dry. If it gets wet, wipe dry immediately.
Liquids can degrade electronic circuits
• Whenever practical, keep the meter away from dust and dirt
that can cause premature wear
• 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
Periodically clean your meter’s case using a damp cloth. DO NOT use
abrasive, flammable liquids, cleaning solvents, or strong detergents as
they may damage the finish, impair safety, or affect the reliability of the
structural components.
Clean the input terminals as follows:
1. Turn the meter off and remove all test leads.
2. Shake out any dirt that may be in the terminals.
3. Soak a new swab with alcohol and work the swab around in
each terminal.
DM397-MAN P. 9
Rotary Switch
µA
A
mA
I n p u t
mAµA
mAµA
A
R a n g e s
500.00µA, 5000.0µA
50.000mA, 500.00mA
5.0000A, 10.000A
-
Battery and Fuse Replacement
1. Unplug the test leads and remove the rubber boot from the instru-
m e n t .
2. Remove the screws in the rear of the instrument and separate the
front and rear housing.
3. Replace the batteries and/or fuses with the same type and size as
the one removed.
4. Snap the front and rear housing back together and reinstall
the screws.
5. Reattach the rubber boot.
S p e c i f i c a t i o n s
Standard Accessories
Standard
Battery, 9 Volt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AB9
Fuse (2A, 600 V RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AF112
Fuse (15A, 600 V RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AF113
Test Lead Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ATL140
Rubber Boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AH180
DL297T-MAN P. 10
Operating temperature 32˚ to 104˚F (0˚ to 40˚C)
Storage temperature -4˚ to 140˚F (-20˚ to 60˚C)
Relative humidity 0 to 80% RH
Battery type 9 V, NEDA 1604, 6F22 or 006P
Battery life 200 hours, alkaline battey
Size (with boot) 21.5 oz
Safety Meets or exceeds IEC348, CSA C22.2 No. 231, ISA DS82,
and UL1244
Limited Warranty
The DL297T is warranted to be free from defects in materials and workmanship for a period
of five years 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 r able) for a service charge. Return the unit postage paid and insured to:
1-800-547-5740 • FAX: (503) 643-6322
www.ueitest.com • Email: info@ueitest.com
This warranty gives you specific legal rights. You may also have other rights which vary from
state to state.
DL297T
Digital Multimeter
Copyright © 2007 UEi DL297T-MAN 1/07
PLEASE
RECYCLE
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