UEi DL250 User Manual

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UEi DL250 User Manual

INSTRUCTION MANUAL

DL250

1-800-547-5740 • Fax: (503) 643-6322 www.ueitest.com • email: info@ueitest.com

Introduction

The DL250 Digital Clamp-on is the all-in-one test-tool that's designed to make quick work of HVAC/R service and industrial maintenance. Whether you're measuring flame safeguard current, motor inrush current, run/start capacitors, recording time-stamped temperature highs and lows, or performing general electrical troubleshooting, the DL250 has you covered! It's convenient size, teardrop jaw design and ergonomic controls add speed, comfort and flexibility to your measurement tasks.

HVAC Trade

Check current draw in motors and compressors

Use MIN/MAX recording in the temperature mode to assess efficiency

Test run/start capacitors

Confirm low voltage control signals

Measure flame safeguard device current draw

Confirm power sources

Analyze temperature and power data with the aid of the time stamp

Electrical Trade

Check for energized circuits

Balance loads

Evaluate electrical contacts

Capture motor in-rush current readings

Determine peak power demand periods

Verify line voltage stability

Monitor motors and other loads for excess hear

Check motor run/start capacitor values

Features include:

400 Amps Ac

600 Volts AC and DC

Resistance to 40 Megohms

Continuity

Capacitance to 10,000 microfarods

Temperature to 750˚F (400˚C)

.01 µA DC resolution for flame safeguard circuit testing

Diode check function

Time-stamped record function

Auto ranging with manual ranging capability

MIN/MAX and data hold

1 1/3” jaw capacity

CE and UL listed CAT III

Three year limited warranty

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 25 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

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

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International Symbols

Controls and Indicators

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1.Clamp: Used to measure inductive AC current. Opens to 1.25" (32 mm).

NOTE: The clamp uses a high tension spring to close the jaw. Do not allow fingers or objects to become pinched in the base as jaw closes.

2.Conductor Alignment Marks: Used to aid in the visual alignment of a conductor when measuring inductive amperage. Greatest accuracy is achieved when the conductor inside the clamp is centered at the intersection of these marks.

3.Hand Guard: Used as a point of reference for the operators safety.

WARNING!

Always keep your hands and fingers behind the hand guards when measuring current on exposed conductors. Contact may result in serious injury.

4.Range and Time Stamp Push-button: Switches meter from auto to manual ranging. Also initiates the time stamp function when used in conjunction with MAX / MIN/Recording.

5.Hold Push-button: Freezes the value displayed on the digital read-out. This function does not work while recording is in progress. Also turns on back light and work area light.

6.MAX/MIN Push-button: Use to cycle through recorded and present values, and the time stamp function.

7.Clamp Lever: Opens and closes current clamp jaw.

8.Mode Push-button: Toggles the color-coded optional functions indicated on the rotary function switch (AC to DC volts, ohms to continuity and degrees centigrade to fahrenheit, frequency to duty cycle).

9.Rotary Function Switch: Used to power the meter on and off, or to select the available measurement functions:

Measures inductive AC current using the clamp

Measures capacitance at the test lead inputs

Measures volts AC or DC Volts at the test lead inputs

Measures resistance or continuity at the test lead inputs

Measures Hz and Duty Cycle

Measures temperature with the K-type thermocouple and adapter plug at the test lead inputs

Measures DC microamps using the test lead inputs

CAUTION!

When taking DC current and micro amp measurements, this meter must be connected in SERIES with the circuit (or circuit element) under test. NEVER CONNECT THE TEST LEADS ACROSS A VOLTAGE SOURCE while the rotary switch is set to the microamps position. This can cause damage to the circuit under test or this meter.

10.Off Position: Turns the meter off. Always store your meter in

the off position. If the meter will not be used for a month or more, remove the batteries.

11.Display: Communicates function, range and value information to the user. (See items 16 through 30)

12.400 µA MAX FUSED: Indicates that the DC µA ranges are fuse protected.

13.Common Terminal: The black test lead is plugged into this terminal to supply the ground or “low” reference for all measurements.

14.MAX 600V : Indicates the maximum voltage potential that can be applied at the terminals.

WARNING!

DO NOT Exceed 1000 volts DC or AC-RMS at either the common or multifunctional input ports, as measured from earth ground.

15.V! µA TEMP Terminal: The red lead is plugged into this terminal. It is used for AC/DC volts, ohms, continuity, microamps, diode, capacitance and temperature measurements.

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The following describes the indicators displayed by the LCD.

21 22 23 24 25 26 27

16

17

28

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29

16. BAT this symbol appears when the battery needs replacement.

NOTE: A low battery will adversely affect accuracy.

17.AC: Indicates that alternating current/voltage is being measured.

18.Minus (—): I n d i cates the value measured has a negative polarity.

19.DC: Indicates that direct current/voltage is being measured.

20.AT: Indicates the meter is in the autoranging mode.

21.MAX: Indicates the meter is displaying the maximum value recorded.

22.R Indicates the meter is currently recording the maximum and minimum values.

23.MIN: Indicates the meter is displaying the minimum

value recorded.

24. ))): Indicates the meter is in the continuity measurement mode.

25. Indicates the meter is in the diode test mode.

26.D.H.: Indicates the value displayed is held on screen (the data hold button is pressed).

27.R.H.: Indicates the meter is in the manual ranging mode (the Range button has been pressed).

28.Function and Units of Measurement:

Symbol

Function or Value

°C

Degrees Centigrade

°F

Degrees Fahrenheit

µF

Micro Farads

mV

Millivolts

V

Volts

µA

Micro Amps (Test Lead

 

Measurement Ranges)

A

Amps (Inductive Clamp Ranges)

M

Mega (Value x 1,000,000)

K

Kilo (Value x 1,000)

!

Ohms (Resistance Value)

29.OFL: This symbol appears when the input value exceeds the meters selected range or overall specification.

Operating Instructions

Auto Power Off

The instrument automatically shuts off after 30 minutes of inactivity. The meter is considered active when there is a change of at least 10 digits during the period (i.e., the meter senses a change from 24.04 volts to 24.14 volts)

To disable this function; press and hold the "MIN/MAX" or the "RANGE" button while turning the meter on. This function will be active in all modes, including RECORD and TIME STAMP, unless it is disabled.

Auto / Manual Range

This instrument is capable of providing either auto (instrument controlled), or manual (operator controlled) ranging. In the autorange mode, the meter automatically selects the range that gives you the best resolution of the value measured. For example, if you were measuring a 9 volt battery that actually put out 9.6 volts, the meter would

automatically display “9.60”, although it has the ability to display “9” or “9.6” for the same battery. The far left, or most significant digit, can only display “0” through “3”, so “9.600” could not be displayed, instead the symbol “0.FL” would appear on the display indicating the measured value exceeded the range selected. The meter automatically enters the autoranging mode when it is first turned on, or if a new function is selected using the rotary dial. In the autoranging mode, the symbol “AT” appears on the display.

Although the autoranging mode is easy to use, there are times that you may prefer the manual ranging mode. For example, suppose you were measuring a series of connectors you know had either 24 or 120 volts AC on them. If your goal was to see which terminal had what voltage applied, the task would go faster and easier if you set the meter to hold the 400 volt range. To select manual range control, press the “RANGE” push-button for approximately 1/2 second. As you release the button, the symbol “R.H” appears at the top of the display, and an audible tone sounds to alert you that the meter has changed ranges or modes. Each subsequent time the RANGE button is pressed, the range increases one step, and a tone sounds until it reaches its highest range. The next press of the range hold button will return the meter to its lowest range.

Recording MIN/MAX

After selecting the mode and range you will be using, you can enable the MIN/MAX recording function. This function allows you meter to store the highest and lowest readings obtained in the following modes:

AC Amps

Temperature

AC and DC Volts

DC microamps

• Ohms

 

 

You may recall and cycle through the high and low readings or view the measurement currently being make while you are in the record mode. Pressing the “MIN/MAX” button locks the meter in the range it was in at that moment and begins the recording precess. Be sure you are in a range that can display the minimum and maximum values you are monitoring (you may prefer to select this range manually). Each time a new high or low value is recorded, an audible beep sounds.

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