TPI Amp Plus Manuel utilisateur

Func. Range Res.

DCV 40V 0.01V

400V 0.1V

600V 1V

ACV 40V 0.01V

400V 0.1V

600V 1V

ACA 40A 0.01A

400A 0.1A

700A 1A

DCA 40A 0.01A

400A 0.1A

700A 1A

OHM 400Ω0.1Ω

4kΩ0.001kΩ

40kΩ0.01kΩ

Frequency

1KHz 0.1Hz

10KHz 0.001KHz

Continuity Test Voltage Threshold

3V < 100Ω(100 digits)

Diode Test Test Voltage Max Test Current

3V Approx. 2.5mA

296 SPECIFICATIONS ±0.75% Basic DCV Accuracy

Test Products International, Inc.

296

Digital Clamp-on

Meter Amp Plus

Instruction Manual

Test Products International, Inc.

9615 SW Allen Blvd., Ste. 104

Beaverton, OR USA 97005

503-520-9197 • Fax: 503-520-1225

[email protected]

Test Products International plc

2 Newcourt Business Park

Perry Road

Harlow, Essex CM18 7PR

England

Tel: 01279 439647 • Fax: 01279 450553

L296M • 12/1/97

WARRANTY

Please refer to product warranty card for

warranty statement.

TABLE OF CONTENTS

A. INTRODUCTION

1. Congratulations ............ 3

2. Product Description.......... 3

3. Declaration of Conformity .... 4

B. SAFETY CONSIDERATIONS ...... 5

C. TECHNICAL DATA

1. Features and Benefits ........ 7

2. Product Applications ........ 8

3. Specifications .............. 9

D. MEASUREMENT TECHNIQUES

1. Controls and Functions ...... 13

2. Step by Step Procedures: .... 16

E. ACCESSORIES ................ 30

F. MAINTENANCE ................ 31

G. TROUBLE SHOOTING GUIDE .... 32

G. TROUBLE SHOOTING GUIDE

Problem Probable Causes

Does not power up

•Dead or defective battery

•Broken wire from battery

snap to PCB

Won’t display current readings

•Open fuse

• Open test lead

•Improperly connected to

circuit under test

All functions except ohms read high

•Very weak battery that will

not turn on the low battery

indicator on the LCD

AC Volts do not read

•Very weak battery that will

not turn on the low battery

indicator on the LCD

A. INTRODUCTION

1. Congratulations!!

Thank you for purchasing TPI products. The

Amp Plus is easy to use and is built to last.

It is backed by a 3 year limited warranty.

Please remember to complete and return

your product warranty registration card.

2. Product Description

The 296 is a clamp-on plus DMM with True RMS and

Harmonics capabilities. The 296 offers measurements in

all basic electrical functions, plus:

•True RMS Provides accurate and dependable

readings of non-linear loads.

•HDR Mode Determines if a signal is clean or

distorted.

•Bar Graph When measuring frequency, bar

graph indicates current level.

•TRIM Mode Smooths out unstable readings.

•Peak Mode For start-up and inrush currents.

•Sleep Mode Preserves battery life.

•Data Hold Holds the reading on the display for

easy viewing.

The 296 comes complete with the following accessories:

Carrying Pouch Instruction Manual

Test Lead Set Battery

F. MAINTENANCE

1. Battery Replacement: The 296 will display a bat-

tery symbol when the internal 9 Volt battery needs

replacement. The battery is replaced as follows:

a. Disconnect and remove all test leads

from live circuits and from the 296.

b. Loosen the screw from the back of the

296 battery cover.

c. Remove the battery compartment cover.

d. Remove old battery and replace with new battery,

observing the correct polarity.

e. Reassemble the instrument in reverse

order from above.

2. Cleaning your 296:

Use a mild detergent and slightly damp cloth to

clean the surfaces of the 296.

3. EC Declaration of Conformity

This is to certify that TPI Model 296 conforms to the

protection requirements of the council directive

89/336/EEC, in the approximation of laws of the member

states relating to Electromagnetic compatibility and

73/23/EEC. The Low Voltage Directive by application of

the following standards:

EN 50081-1 1992 Emissions Standard

EN 50082-1 1992 Immunity Standard

EN 61010-1 1993 Safety Standard

EN 61010-2-031 1995 Safety Standard

EN 61010-2-032 1995 Safety Standard

To ensure conformity with these standard, this instru-

ment must be operated in accordance with the instruc-

tions and specifications given in this manual.

CAUTION: Even though this instrument complies with

the immunity standards, it’s accuracy can be affected

by strong radio emissions not covered in the above

standards. Sources such as hand-held radio trans-

ceivers, radio and TV transmitters, vehicle radios and

cellular phones generate electromagnetic radiation

that could be induced into the test leads of this instru-

ment. Care should be taken to avoid such situations or

alternatively, check to make sure that the instrument is

not being influence by these emissions.

CAUTION: Please follow manufacturers test proce-

dures whenever possible. Do not attempt to measure

unknown voltages or components until a complete

understanding of the circuit is obtained.

E. ACCESSORIES*

Standard Accessories Part No.

9 Volt Alkaline Battery A009A

Test Lead Set A040

Soft Carrying Pouch A200

Optional Accessories Part No.

Deluxe Test Lead Set SDK1C

IEC 1010 Deluxe Test Lead Kit TLS2000BC

Hard Carrying Case A201

*These accessories are not approved from UL.

B. SAFETY CONSIDERATIONS

WARNING: Please follow manufacturers test

procedures whenever possible. Do not attempt to

measure unknown voltages or components until a

complete understanding of the circuit is obtained.

GENERAL GUIDELINES

ALWAYS

•Test the 296 before using it to make sure it is

operating properly.

•Inspect the test leads before using to make sure there

are no breaks or shorts.

•Double check all connections before testing.

•Have someone check on you periodically if

working alone.

•Have a complete understanding of the circuit

being measured.

•Disconnect power to circuit, then connect test leads to

the 296, then to circuit being measured.

NEVER

•Attempt to measure unknown high voltages.

•Attempt to measure current with the meter in

parallel to the circuit.

•Connect the test leads to a live circuit before

setting up the instrument.

•Touch any exposed metal part of the test lead assembly.

l. Disable Sleep Mode

1. Set the 296 to the OFF position.

2. Push and hold down the HOLD button while

turning the rotary switch to the desired function.

3. Release the HOLD button.

4. Check the LCD to see if the HOLD function is

activated. If “H” is on the display, push the HOLD

button to deactivate the DATA HOLD mode.

5. Sleep mode is now deactivated.

INTERNATIONAL SYMBOLS

CAUTION: RISK OF ELECTRIC SHOCK

AC (ALTERNATION CURRENT)

DC (DIRECT CURRENT)

REFER TO INSTRUCTION MANUAL

GROUND

DOUBLE INSULATION

EITHER DC OR AC

i. Data Hold

Press the HOLD button at any time on any function

to freeze the reading on the LCD display. This

function is very useful when measuring in locations

where the display is difficult to read.

j. Trim

(Average sensing mode for ACV, ACA, OHM, Diode

and Continuity.)

Press the TRIM button when measuring unstable

signals to stabilize the reading. The 296 will aver-

age the measured value approximately every 1.25

seconds to obtain a clearer picture of the current

or voltage being measured.

k. Peak Mode

1. Set the 296 to the ACA function.

2. Push the RNG button and select the desired

measurement range.

3. Push the TRIM button until PEAK shows on LCD.

4. Allow the LCD to stabilize to zero.

5. Clamp the jaws around a single conductor to the

device to be measured.

6. Apply power to the device under test.

7. Read the PEAK current on the LCD immediately

after the test.

C. TECHNICAL DATA

1. Features and Benefits

Agency UL Listed to U.S. and Canadian Safety

Standards. Meets CE and IEC 1010.

True RMS Needed to accurately measure non-sinu-

soidal AC voltage and current waveforms

found on many controls and circuits.

HDR Mode Determines if a signal is clean or distorted.

Displays the harmonic distortion ratio on

ACV and ACA at line voltage and 60 Hz.

4000 Count Improves the resolution on all functions

and ranges.

Data Hold Maintains the reading on the display for

hard to reads areas.

Peak Mode Measure the inrush current of motors,

relays and solenoids.

Trim Mode Averages the readings for more stable out-

put on LCD.

Record Mode Records Min/Max and Average value of the

function being measured.

Sleep Mode Automatically powers down after 10

minutes of inactivity.

Frequency Measures the frequency of the current

being measured.

Dual Display When measuring frequency, the bar graph

indicates the current level.

Bar Graph Shows rapidly changing input signals

that the normal display will not.

h. Measuring Frequency

CAUTION!

Do not attempt to make frequency measurements with

test leads. The 296 measures the frequency by clamp-

ing the jaw around one conductor (wire). Clamping

around more than one wire will result in erroneous

readings.

Instrument set-up:

FUNC BLACK RED MIN MAX

TEST LEAD TEST LEAD READING READING

FREQ NOT USED NOT USED 0.5Hz 10KHz

Measurement Procedure:

1. Disconnect power to circuit to be measured.

2. Set the rotary switch to the FREQ function.

3. Clamp the jaws around one conductor of the circuit

to be measured.

4. Reconnect power to circuit to be measured.

5. Read the frequency on the 296.

Note:

The current of the frequency being measured is

displayed on the bar graph.

Optional Modes:

•HOLD: Freezes the reading on the LCD.

•RANGE: Manually ranges the instrument.

2. Product Applications

Perform the following tests and/or measurements with

the 296 and the appropriate function:

HVAC/R

ACA •Heat anticipator current in thermostats.

ACV •Line voltage.

ACV or DCV •Control circuit voltage.

OHMS •Heating element resistance (continuity).

OHMS •Compressor winding resistance.

OHMS •Contactor and relay coil resistance.

ACA •Motor and compressor start up current.

OHMS •Continuity of wiring.

Hz/FREQ •Frequency on control and line voltages.

REC •Record min/max voltage of controls

and line voltages.

ALL •Bar graph to indicate rapid fluctuations.

ELECTRICAL

ACV •Measure line voltage.

ACA •Measure line current.

OHMS •Continuity of circuit breakers.

DCV •Voltage of direct drive DC motors.

DCA •Current of direct drive DC motors.

ACA •Start up current of motors, relays,

contactors and transformers.

ALL •Harmonics detection on line voltages.

ELECTRONIC

ACV •Measure power supply voltage.

ACA •Measure power supply current.

OHMS •Continuity of circuit breakers and fuses.

g. Measuring Diodes

CAUTION!

Do not attempt to make diode measurements with

circuit energized. The only way to accurately test a

diode is to remove it completely from the circuit before

attempting to measure it.

Instrument set-up:

FUNC. BLACK RED MIN MAX

TEST LEAD TEST LEAD READING READING

COM V/Ω0.001V 2.000V

Measurement Procedure:

1. Disconnect power to circuit to be measured.

2. Plug the black test lead into COM input jack.

3. Plug red test lead into the V/Ωinput jack.

4. Set the rotary switch to the function.

5. Connect the black test lead to the banded end of

the diode and the red test lead to the non-banded

end of the diode.

6. Reading on the display should be between 0.5 and

0.8 volts.

7. Reverse test lead connections in 5 above.

8. Reading on the display should be OFL (Overload).

NOTE: If diode reads 0 in both directions, diode is

shorted. If diode reads OFL in both directions, diode

is open.

3. Specifications

IEC 1010 Over Voltage:

CAT II - 1000VDC, 600VAC

CAT III - 600V

Pollution Degree 2

※INSTALLATIONⅠ·Ⅱ·Ⅲ

INSTALLATION CATEGORY(OVERVOLTAGE

CATEGORY) Ⅰ

: Signal level, special equipment or parts of

equipment, telecommunication, electronic

etc., with smaller transient overvoltages

than INSTALLATION CATEGORYⅡ

INSTALLATION CATEGORY(OVERVOLTAGE

CATEGORY) Ⅱ

: Local level, appliances, PORTABLE

EQUIPMENT etc., with smaller transient

overvoltages than INSTALLATION

CATEGORYⅢ

INSTALLATION CATEGORY(OVERVOLTAGE

CATEGORY) Ⅲ

: Distribution level, fixed installation, with

smaller transient overvoltages than

INSTALLATION CATEGORYⅣ.

UL 3111-1

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