User Manual

STEP BY STEP PROCEDURES: 8
STEP BY STEP PROCEDURES: 7
a.Measuring DC Volts
WARNING!
Do not attempt to make a voltage measurement of
more than 600V or of a voltage level that is unknown.
Instrument set-up:
FUNC BLACK RED MIN MAX
TEST LEAD TEST LEAD READING READING
DCV COM VΩ 1mV 600V
Measurement Procedure:
1. Disconnect power to circuit to be measured.
2. Plug the black test lead into the COM input jack.
3 Plug red test lead into V/
ΩΩ
input jack.
4. Set rotary switch on 122 to desired range in DCV
function depending on the voltage to be measured.
5. Connect the test leads to the circuit to be measured.
6. Reconnect power to the circuit to be measured.
7. Read the voltage on the 122.
b. Measuring AC Volts
WARNING!
Do not attempt to make a voltage measurement of more than
1000V or of a voltage level that is unknown.
Instrument set-up:
FUNC BLACK RED MIN MAX
TEST LEAD TEST LEAD READING READING
ACV COM V/Ω 1mV 600V
Measurement Procedure:
1. Disconnect power to circuit to be measured.
2. Plug the black test lead into the COM input jack.
3. Plug red test lead into V/
ΩΩ
input jack.
4. Set rotary switch on the 122 to desired range in ACV
function depending on the voltage to be measured.
5. Connect the test leads to the circuit to be measured.
6. Reconnect power to the circuit to be measured.
c. Measuring Resistance
WARNING!
Do not attempt to make resistance measurements with
circuit energized. For best results, remove resistor
completely from circuit before attempting to measure.
NOTE:
To make accurate low ohm measurements, short ends of test leads togeth-
er and record resistance reading. Deduct this value from actual readings.
Instrument set-up:
FUNC BLACK RED MIN MAX
TEST LEAD TEST LEAD READING READING
OHM COM VΩ 1Ω 2.000kΩ
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 the V/
ΩΩ
input jack.
4. Set rotary switch on the 122 to 2k
ΩΩ
function
depending on the voltage to be measured.
5. Connect the 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 the V/
ΩΩ
input jack.
4. Set the rotary switch on the 122 to the position.
5. Connect the test leads to the circuit to be measured.
6. Listen for the buzzer to confirm continuity.
e. Data Hold
Press the DATA-H button at any time on any function or
range to freeze the reading on the LCD display. This func-
tion is very useful when measuring in locations where the
display is difficult to read.
Standard Accessories Part No.
9V Battery A009
Test Lead Set A040
Rubber Boot (122 only) A121
Optional Accessories Part No.
Deluxe Test Lead Set SDK1C
Microamp Adapter A112
Temperature Adapter A301
Carbon Monoxide Accessories A701/A702/A711
Boot Hook A120
Soft Carrying Case A255
Carrying Case for multiple instruments A901
*These accessories have not been evaluated by UL and are
not considered as part of the UL Listing of this product.
MAINTENANCE
1. Battery Replacement: The 122 will display BAT 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 122.
b. Remove the 122 from its protective boot.
c. Remove the four screws from back of 122 housing.
d. Carefully pull apart front and rear instrument housing.
e. Remove old battery and replace it with new battery.
f. Reassemble instrument in reverse order from above.
2. Cleaning your 122
Use a mild detergent and slightly damp cloth to clean the surfaces of 122.
Digital Multimeter 122
Instruction Manual
Test Products International, Inc.
9615 SW Allen Blvd., Ste. 104
Beaverton, OR USA 97005
503-520-9197 • Fax: [phone]
[e-mail]
Test Products International, Ltd.
342 Bronte Road South, Unit 9
Milton, Ontario L9T5B7
Canada
905-693-8558 • Fax: [phone]
L122M • 12/1/97 copyright © 1998 Test Products International, Inc.
STEP BY STEP PROCEDURES: 9 STEP BY STEP PROCEDURES: 10