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EC DECLARATION OF CONFORMITY

1

This is to certify that model 122 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

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 trans-
mitters, vehicle radios and cellular phones generate electromagnetic radia-
tion 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.

SAFETY CONSIDERATIONS

2

WARNING:  Please follow manufacturers test proce-

dures whenever possible.  Do not attempt to measure
unknown voltages or components until a complete under-
standing of the circuit is obtained.

GENERAL GUIDELINES

ALWAYS

Test the 122 before using it to make sure it is operating properly.

Inspect 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 circuit being measured.

Disconnect power to circuit, then connect test leads to the 122, then to cir-
cuit 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.

INTERNATIONAL SYMBOLS

3

CAUTION: RISK OF ELECTRIC SHOCK

AC (ALTERNATING CURRENT)

DC (DIRECT CURRENT)

REFER TO INSTRUCTION MANUAL

GROUND

DOUBLE INSULATION

ON/OFF, PUSH BUTTON SWITCH

Features and Benefits

Safety

Meets CE and IEC 1010 requirements. UL Listed.

Large LCD

Easy to read at all angles and the majority of lighting levels.

Data Hold

Freeze readings on the display.

Rubber Boot

Added protection when the instrument is dropped. (122NB does
not include boot.)

Versatile

Use accessories like a carbon monoxide attachment to expand
the capabilities of the 122.

PRODUCT APPLICATIONS

4

Perform the following with the TPI 122 and appropriate function:

HVAC/R

FUNCTION

ACV

Line voltage.

ACV or DCV

Control circuit voltage.

OHMS

Heating element resistance (continuity).

OHMS

Compressor winding resistance.

OHMS

Contactor and relay coil resistance.

OHMS

Continuity of wiring.

ELECTRICAL

FUNCTION

ACV

Measure line voltage.

OHMS

Continuity of circuit breakers.

DCV

Voltage of direct drive DC motors.

SPECIFICATIONS

a.  General Specifications

Power Supply

9 Volt Battery

Battery Life

560 hrs. Alkaline

Size (H x L x W)

33mm x 86mm x 187mm (1.3” x 3.4” x 7.4”)

Weight

340g  (12 oz)

SPECIFICATIONS (cont.)

5

IEC 1010 Over Voltage:

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

b.  DCV

Range

Resolution

Accuracy

Impedance

2000mv

1mV

±0.5% of reading, 

10M Ohm

20V

0.01V

±2 digits

200V

0.1V

600V

0.1V

c.   ACV  (45Hz to 450Hz)

Range

Resolution

Accuracy

Impedance

2000mV

1mv

200V

0.1V

±1.2% of reading,

10M Ohm

600V

1V

±3 digits

d.  OHM (Resistance,

)

Range

Resolution

Accuracy

Overload Protection

2k

0.001k

±0. 5% of reading, ±1 digit

600V DC or AC Peak

e.  Continuity Buzzer

Test Voltage

Threshold

Overload Protection

2.5V

<100

600 V DC or Peak AC

*Warning:  

Test Leads:  Use only correct type and overvoltage category rating.

MEASUREMENT TECHNIQUES

6

1.

Controls and Functions:

Push Buttons

Turns the 122 on and off.

D/H

Activates the Data Hold function.

Rotary Switch

V

Used for measurement of DC Volts.  Select
best range for the voltage to be measured.

V

Used for measurement of AC Volts.  Select
best range for the voltage to be measured.

Used for measurement of Resistance and
Continuity.

Input Jacks

COM

Black test lead connection for all functions.

V/

Red test lead connection for OHM, Continuity
Buzzer, DCV and ACV functions.

Summary of Contents for 122

Page 1: ...test leads to the circuit to be measured 6 Read the resistance value on the 122 d Continuity Buzzer WARNING Do not attempt to make continuity measurements with circuit energized Instrument set up FUNCTION BLACK TEST LEAD RED TEST LEAD OHM COM VΩ Measurement Procedure 1 Disconnect power to the circuit to be measured 2 Plug the black test lead into the COM input jack 3 Plug the red test lead into th...

Page 2: ...TION RISK OF ELECTRIC SHOCK AC ALTERNATING CURRENT DC DIRECT CURRENT REFER TO INSTRUCTION MANUAL GROUND DOUBLE INSULATION ON OFF PUSH BUTTON SWITCH Features and Benefits Safety Meets CE and IEC 1010 requirements UL Listed Large LCD Easy to read at all angles and the majority of lighting levels Data Hold Freeze readings on the display Rubber Boot Added protection when the instrument is dropped 122N...

Page 3: ...TION RISK OF ELECTRIC SHOCK AC ALTERNATING CURRENT DC DIRECT CURRENT REFER TO INSTRUCTION MANUAL GROUND DOUBLE INSULATION ON OFF PUSH BUTTON SWITCH Features and Benefits Safety Meets CE and IEC 1010 requirements UL Listed Large LCD Easy to read at all angles and the majority of lighting levels Data Hold Freeze readings on the display Rubber Boot Added protection when the instrument is dropped 122N...

Page 4: ...TION RISK OF ELECTRIC SHOCK AC ALTERNATING CURRENT DC DIRECT CURRENT REFER TO INSTRUCTION MANUAL GROUND DOUBLE INSULATION ON OFF PUSH BUTTON SWITCH Features and Benefits Safety Meets CE and IEC 1010 requirements UL Listed Large LCD Easy to read at all angles and the majority of lighting levels Data Hold Freeze readings on the display Rubber Boot Added protection when the instrument is dropped 122N...

Page 5: ...TION RISK OF ELECTRIC SHOCK AC ALTERNATING CURRENT DC DIRECT CURRENT REFER TO INSTRUCTION MANUAL GROUND DOUBLE INSULATION ON OFF PUSH BUTTON SWITCH Features and Benefits Safety Meets CE and IEC 1010 requirements UL Listed Large LCD Easy to read at all angles and the majority of lighting levels Data Hold Freeze readings on the display Rubber Boot Added protection when the instrument is dropped 122N...

Page 6: ...TION RISK OF ELECTRIC SHOCK AC ALTERNATING CURRENT DC DIRECT CURRENT REFER TO INSTRUCTION MANUAL GROUND DOUBLE INSULATION ON OFF PUSH BUTTON SWITCH Features and Benefits Safety Meets CE and IEC 1010 requirements UL Listed Large LCD Easy to read at all angles and the majority of lighting levels Data Hold Freeze readings on the display Rubber Boot Added protection when the instrument is dropped 122N...

Page 7: ...TION RISK OF ELECTRIC SHOCK AC ALTERNATING CURRENT DC DIRECT CURRENT REFER TO INSTRUCTION MANUAL GROUND DOUBLE INSULATION ON OFF PUSH BUTTON SWITCH Features and Benefits Safety Meets CE and IEC 1010 requirements UL Listed Large LCD Easy to read at all angles and the majority of lighting levels Data Hold Freeze readings on the display Rubber Boot Added protection when the instrument is dropped 122N...

Page 8: ...test leads to the circuit to be measured 6 Read the resistance value on the 122 d Continuity Buzzer WARNING Do not attempt to make continuity measurements with circuit energized Instrument set up FUNCTION BLACK TEST LEAD RED TEST LEAD OHM COM VΩ Measurement Procedure 1 Disconnect power to the circuit to be measured 2 Plug the black test lead into the COM input jack 3 Plug the red test lead into th...

Page 9: ...test leads to the circuit to be measured 6 Read the resistance value on the 122 d Continuity Buzzer WARNING Do not attempt to make continuity measurements with circuit energized Instrument set up FUNCTION BLACK TEST LEAD RED TEST LEAD OHM COM VΩ Measurement Procedure 1 Disconnect power to the circuit to be measured 2 Plug the black test lead into the COM input jack 3 Plug the red test lead into th...

Page 10: ...test leads to the circuit to be measured 6 Read the resistance value on the 122 d Continuity Buzzer WARNING Do not attempt to make continuity measurements with circuit energized Instrument set up FUNCTION BLACK TEST LEAD RED TEST LEAD OHM COM VΩ Measurement Procedure 1 Disconnect power to the circuit to be measured 2 Plug the black test lead into the COM input jack 3 Plug the red test lead into th...

Page 11: ...test leads to the circuit to be measured 6 Read the resistance value on the 122 d Continuity Buzzer WARNING Do not attempt to make continuity measurements with circuit energized Instrument set up FUNCTION BLACK TEST LEAD RED TEST LEAD OHM COM VΩ Measurement Procedure 1 Disconnect power to the circuit to be measured 2 Plug the black test lead into the COM input jack 3 Plug the red test lead into th...

Page 12: ...test leads to the circuit to be measured 6 Read the resistance value on the 122 d Continuity Buzzer WARNING Do not attempt to make continuity measurements with circuit energized Instrument set up FUNCTION BLACK TEST LEAD RED TEST LEAD OHM COM VΩ Measurement Procedure 1 Disconnect power to the circuit to be measured 2 Plug the black test lead into the COM input jack 3 Plug the red test lead into th...

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