TPI 126 User Manual

126

Digital Multimeter

Instruction Manual

TABLE OF CONTENTS

A. INTRODUCTION

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

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

3. EC Declaration of Conformity . . . . . . . .4

B. SAFETY CONSIDERATIONS . . . . . . . . . . . .5

C. TECHNICAL DATA

1. Features and Benefits . . . . . . . . . . . . .6

2. Product Applications . . . . . . . . . . . . . .7

3. Specifications . . . . . . . . . . . . . . . . . . .8

D. MEASUREMENT TECHNIQUES

1. Controls and Functions . . . . . . . . . .10

2. Step by Step Procedures:

a) Measuring DC Volts . . . . . . .13

b) Measuring AC Volts . . . . . . .15

c) Measuring DC Amps . . . . . .16

d) Measuring AC Amps . . . . . .17

e) Measuring Resistance . . . . .19

f) Measuring Diodes . . . . . . . .20

g) Continuity Buzzer . . . . . . . .21

h) Data Hold . . . . . . . . . . . . . .21

i) Record Mode . . . . . . . . . . .22

page

E. ACCESSORIES . . . . . . . . . . . . . . . . . . . . .23

F. MAINTENANCE . . . . . . . . . . . . . . . . . . . .24

G. TROUBLE SHOOTING GUIDE . . . . . . . . . .25

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A. INTRODUCTION

1. Congratulations!!

Thank you for purchasing TPI brand products. The meter 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 126 is a hand-held autoranging DMM. The 126
measures ACV, DCV, ACA, DCA, Resistance, Diodes and
Continuity.

The 126 also features:

• REC Records Min/Max readings during

specified measurement intervals.

• AC/DC Toggles between AC/DC volts and Amps.

• RANGE Allows the user to manually range the

126 instead of autoranging.

• Data Hold Holds the reading on the display for

easy viewing.

• Auto Off Preserves battery life.

The 126 comes complete with the following accessories:

126 Instrument
Rubber Boot
Test Lead Set
Instruction Manual
Battery

3. EC Declaration of Conformity

This is to certify that TPI model 126 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
EN61010-1 1993 Safety Standard
EN61010-2-031 1995 Safety Standard
EN61010-2-032 1995 Safety Standard

To ensure conformity with these standards, this instrument
must be operated in accordance with the instructions and
specifications given in this manual.

CAUTION:

Even though this instrument complies with the
immunity standards, the accuracy can be affect­ed by strong radio emissions not covered in the
above standards. Sources such as hand held
radio transceivers, radio and TV transmitters,
vehicle radios and cellular phones generate
electromagnetic radiation that could be induced
into the test leads of this instrument. Care
should be taken to avoid such situations or
alternatively, check to make sure that the
instrument is not being influenced by these
emissions.

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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

W

AYS

AL

• Test the 126 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 complete understanding of circuit being

measured.

• Disconnect power to circuit then, connect test

leads to the 126, 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.

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INTERNATIONAL SYMBOLS

DANGEROUS VOLTAGE

AC (ALTERNATING CURRENT)

DC (DIRECT CURRENT)

REFER TO INSTRUCTION MANUAL

GROUND

FUSE

DOUBLE INSULATION

ON/OFF, PUSH BUTTON SWITCH

C. TECHNICAL DATA

1. Features and Benefits

Agency Approval Meets CE and IEC 1010 requirements.

Record Records Min/Max values.

Range Allows you to either manual range or

use auto range to select the appropri­ate range.

Auto Off Preserves battery life. LCD shows oFF

when in this mode. Automatically
powers down after 30 minutes of
inactivity.

3 Year Covered by a standard 3 year warranty.
Warranty

2. Product Applications

Perform the following tests and/or measurements
with the TPI 126 and the appropriate function:

HVAC/R

FUNCTION
DCmV • Thermocouples in furnaces or gas

applications.

DCV • Thermocouples in furnaces of gas

applications. DC controlled circuits.

ACA • Heat anticipator current in thermostats.

ACV • Line voltage.

ACV or DCV • Control circuit voltage.

DCµA • Flame safeguard control current.

OHMS • Heating element resistance (continuity).

OHMS • Compressor winding resistance.

OHMS • Contactor and relay coil resistance.

OHMS • Continuity of wiring.

DCmV • Temperature with optional temperature

adapter (A301).

ELECTRICAL

FUNCTION
ACV • Measure line voltage.

OHMS • Continuity of circuit breakers.

DCV • Voltage of direct drive DC motors.

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3. Specifications

IEC 1010 Over Voltage:

CAT II - 1000V
CAT III - 600V
Pollution Degree 2

UL 3111-1

a. DCV

Range Resolution Accuracy Impedance

400mV 0.1mV ±0.3% of reading, 10MΩ
4V 0.001V ±3 digits
40V 0.01V
400V 0.1V
1000V 1V

b. ACV (45 to 450 Hz)

Range Resolution Accuracy Impedance

4V 0.001V ±0.8% of reading, 10MΩ
40V 0.01V ±3 digits
400V 0.1V
750V 1V

c. DCA

Range Resolution Accuracy Overload Protection

400µA 0.1µA ±0.8% of reading, Fuse
4mA 0.001mA ±3 digits 0.5Amp/600V
40mA 0.01mA
400mA 0.1mA

*Warning: Use only correct size, voltage and current rated fuses.
Test Leads: Use only correct type and overvoltage category rating.

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d. ACA

Range Resolution Accuracy Overload Protection

400µA 0.1µA ±0. 8% of reading, Fuse
4000µA 1µA ±3 digits 0.5Amp/600V
40mA 0.01mA
400mA 0.1mA

e. OHM (Resistance,Ω)

Range Resolution Accuracy Overload Protection

400Ω 0.1Ω ±0. 5% of reading, 600V DC or
4kΩ 0.001kΩ ±3 digits AC Peak
40kΩ 0.01kΩ
400kΩ 0.1kΩ
4MΩ 0.001MΩ ±1% of reading,
40MΩ 0.01MΩ ±3 digits

f. Diode Test

Test Voltage Max Test Current Over Load Protection

3V Approx. 30µA 600 V DC or Peak AC

g. Continuity Buzzer

Test Voltage Threshold Over Load Protection

3V < 50Ω 600 V DC or Peak AC

h. General Specifications

Max. Volt. between 1000V
any Input and Ground
Fuse Protection mA: 0.5Amp/600VAC
Display Type 4,000 Count, 2 times per second update
Operating Temp. 0° to 40°C (32° to 104°F)
Storage Temp. -10° to 50°C (14° to 122°F)
Relative Humidity 0% to 80%
Power Supply 2 Each 1.5 Volt “AA” Batteries
Battery Life 200 hrs. Typical
Size (H x L x W) 33mm x 86mm x 187mm (1.3in x 3.4in x 7.4in)
Weight 340g (12oz)

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