TPI 293 User Manual
293
Digital Clamp-on
Meter Amp Plus
Instruction Manual
2
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 ............12
2. Step by Step Procedures: ........15
E. ACCESSORIES ................................26
F. MAINTENANCE ................................27
G. TROUBLE SHOOTING GUIDE ..........28
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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 293 is a clamp-on plus DMM with True RMS
capabilities. The 293 offers measurements in all
basic electrical functions, plus:
• True RMS Provides accurate and dependable
readings of non-linear loads.
• 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 293 comes complete with the following accessories:
Carrying Pouch
Test Lead Set
Instruction Manual
Battery
4
3. EC Declaration of Conformity
This is to certify that TPI Model 293 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 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, it’s 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 influence by these emissions.
CAUTION: 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.
5
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 293 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 293, 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.
!
6
INTERNATIONAL SYMBOLS
CAUTION: RISK OF ELECTRIC SHOCK
REFER TO INSTRUCTION MANUAL
GROUND
DOUBLE INSULATION
EITHER DC OR AC
!
7
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-
sinusoidal AC voltage and current
waveforms found on many controls
and circuits.
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 sta-
ble output on LCD.
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.
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2. Product Applications
Perform the following tests and/or measurements with
the 293 and the appropriate function:
HV
AC/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.
ACA • Start up current of motors, relays,
contactors and transformers.
ELECTRONIC
ACV • Measure power supply voltage.
ACA • Measure power supply current.
OHMS • Continuity of circuit breakers and fuses.
!
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3. Specifications
IEC 1010 Over Voltage:
CAT II - 1000V
CAT III - 600V
Pollution Degree 2
a. DCV
Range Resolution Accuracy Impedance
40V 0.01V ±0.75% of reading, 10MΩ
400V 0.1V ±3 digits
600V 1V
b1. ACV (45Hz to 60Hz)
Range Resolution Accuracy Impedance
40V 0.01V ±1.0% of reading, 10MΩ
400V 0.1V ±3 digits
600V 1V
b2. ACV (20Hz to 45Hz, 60Hz to 1KHz)
Range Resolution Accuracy Impedance
40V 0.01V ±2.5% of reading, 10MΩ
400V 0.1V ±3 digits
600V 1V
UL 3111-1
*Warning: Test Leads. Use only correct type and
overvoltage category rating.
!
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c. ACA
Range Res. Accuracy Freq. Response
40A 0.01A ±2% of reading, ±20 digits 45Hz to 60Hz
±4% of reading, ±20 digits 30Hz to 45Hz
±4% of reading, ±20 digits 60Hz to 1KHz
400A 0.1A ±2% of reading, ±10 digits 45Hz to 60Hz
700A 1A ±5% of reading, ±10 digits 30Hz to 45Hz
±5% of reading, ±10 digits 60Hz to 1KHz
e. OHM (Resistance, )
Range Res. Accuracy Overload
Protection
400 0.1 ±1% of reading, ±10 digits 600V DC or
4k 0.001k ±1% of reading, ±3 digits AC Peak
40k 0.01k
f. Continuity Buzzer
Test Voltage Threshold Over Load Protection
3V < 100 (100 digits) 600 V DC or Peak AC
g. Diode Test
Test Voltage Max Test Current Over Load Protection
3V Approx. 2.5mA 600 V DC or Peak AC
*Warning: Test Leads. Use only correct type and
overvoltage category rating.
!
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