Veris 275 User Manual
275
Digital Clamp-on
Meter Instruction Manual
A. INTRODUCTION
1. Congratulations!!
Thank you for purchasing TPI products. The 275 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 slim design 275 is a hand-held, autoranging
clamp-on DMM. Extra large numerals, DC amps,
min/max, capacitance, DC microamps and duty cycle are
just a few of the features of the 275. An affordable
choice, the 275 offers measurements in all basic electrical functions with additional advanced features like noncontact voltage.
The 275 comes complete with the following accessories:
Carrying Pouch
Test Lead Set
Temperature Probe
Instruction Manual
Battery & Fuse
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..................6
2. Product Applications ..................7
3. Specifications..............................8
D. MEASUREMENT TECHNIQUES
1. Controls and Functions ............12
2. Step by Step Procedures: ........14
E. OTHER FEATURES ..........................24
F. APPLICATION NOTES ......................29
G. TROUBLE SHOOTING GUIDE ..........34
H. MAINTENANCE ................................35
I. ACCESSORIES ................................36
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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
ALWAYS
• Test the 275 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 275, then to circuit being measured.
NEVER
• Attempt to measure unknown high voltages.
• Attempt to measure DC microamps 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.
3. EC Declaration of Conformity
This is to certify that TPI Model 275 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.
4 5
INTERNATIONAL SYMBOLS
CAUTION: RISK OF ELECTRIC SHOCK
AC (Alternation Current)
DC (Direct Current)
REFER TO INSTRUCTION MANUAL
GROUND
DOUBLE INSULATION
EITHER DC OR AC
C. TECHNICAL DATA
1. Features and Benefits
Agency Meets CE and IEC 1010.
Analog Bar Displays rapidly changing input
Graph signals.
NCV Non-contact voltage detection. Detect
the presence of voltage without contacting the circuit.
P-H Captures min / max peak.
MAX/MIN Records Min/Max readings for all
functions and ranges.
REL Measurements made are displayed
relative to a stored value.
Auto Off Automatically powers off after 30
minutes of inactivity.
2. Product Applications
Perform the following tests and/or measurements with
the 275 and the appropriate function:
HV
AC/R
DCmV • Thermocouples in furnaces.
ACA • Heat anticipator current in thermostats.
ACV • Line voltage.
ACV or DCV • Control circuit voltage.
DCµµA • Flame safegaurd control current.
OHMS • Compressor winding resistance.
OHMS • Continuity of wiring.
CAP • Motor start and run capacitors.
ACA • Motor and compressor start up current.
Hz • Frequency on controls and line voltage.
TEMP • Air duct temperatures.
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
Temperature for gauranteed accuracy: 23ºC +
5ºC
DC VOLTS
Range Res. Accuracy
110mV 0.1mV
Impedance:
1V 0.001V +/-(0.5% of reading + 2 digits) 10MΩ
11V 0.01V Overload Protection:
110V 0.1V 600VDC or AC RMS
600V 1V
(45Hz to 100Hz Frequency Response 400mV Range)
AC VOLTS
(45Hz to 450Hz Frequency Response All Other Ranges)
Range Res. Accuracy
110mV 0.1mV +/-(1.2% of reading + 5 digits) Impedance:
1V 0.001V
+/-(1.2% of reading + 3 digits) 10MΩ
11V 0.01V
Overload Protection:
110V 0.1V
+/-(1.5% of reading + 3 digits) 600VDC or AC RMS
600V 1V
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DC Microamps
Range Res. Accuracy
110uA 0.01µA
+/-(0.8% of reading + 2 digits) Overload Protection:
1100uA 0.1µA 0.5A / 600V Fusee
* DC microamps are measured with the test leads in series with
the circuit under test.
DC AMPS
Range Res. Accuracy
110A 0.01A
+/-(0.8% of reading + 2 digits)
400A 0.1A e
OHM (Resistance, Ω)
Range Res. Accuracy
110Ω 0.1Ω ±(1% of reading +5 digits)
1kΩ 0.001kΩ ±(1% of reading +2 digits)
Overload Protection:
110kΩ 0.01kΩ 250VDC or AC RMS
110kΩ 0.1kΩ
1MΩ 0.001MΩ ±(3% of reading +5 digits)
11MΩ 0.01MΩ ±(3% of reading +10 digits)
110MΩ
Frequency (Hz)
Range Res. Accuracy
1111.0Hz 0.1Hz
±(1% of reading +2 digits)
11.000kHz 0.001kHz
110.00MHz 0.01kHz
Overload Protection:
1.1000MHz 0.0001MHz 250VDC or AC RMS
11.000MHz 0.001MHz
110.00MHz 0.01MHz
UL 3111 Pending
(45Hz to 100Hz Frequency Response 200A to 400A)
AC AMPS (45Hz to 450Hz Frequency Response Below 200A)
Range Res. Accuracy
110A 0.01A
+/-(3.0% of reading + 5 digits)
400A 0.1A e
Warning: Use only correct type and overvoltage
category rated test leads. Remove the
temperature probe when using the test
leads or amp clamp.
Diode Test
Test Current Over Load Protection
1.5mA MAX 250 V DC or AC RMS
Continuity Buzzer
Test Voltage Threshold Over Load Protection
3V <35Ω 250 V DC or AC RMS
Non-Contact Voltage (NCV)
Detection Range: 24VAC and above
Temperature (K-Type thermocouple)
Range Res. Accuracy
-30ºF to 1000ºF 1ºF +
(2ºF) 32.0ºF to 120ºF
+ (1%+2ºF) -3ºF to 749ºF
+
(2%+1.5ºF) 750ºF to 1000ºF
+ (2%+4ºF) -40ºF to -4ºF
Overload Protection: 60VDC or 30VAC RMS
**Celsius version of the 275 is available
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Capacitance
Range Res. Accuracy
11nF 0.001nF
±(3% of reading +5 digits)
110nF 0.01nF
1.1uF 0.0001uF Overload Protection:
11µF 0.001µF 500VDC or AC RMS
110µF 0.01µF
1.1mF 0.0001mF
11mF 0.001mF
110mF 0.01mF
±(7% of reading +5 digits)
nF= nanofarad, µF= microfarad, mF= millifarad
General
Max Voltage between any 600V
input and ground
Fuse Protection (µµA range) 0.5A/600V
Display Type 4000 Count 41 seg. bargraph
Operating Temperature 32ºF to 104ºF (0ºC to 40ºC)
Storage Temperature 14ºF to 122ºF (-10ºC to 50ºC)
Relative Humidity 80% non-condensing
Power Supply 9V (MN1604)
Battery Life 80 hrs. typical
Size (H x L x W) 32.5mm x 255mm x 65mm
(1.3in x 10in x 2.5in)
Weight 363g (0.8lbs)
Warning: Use only correct type and overvoltage
category rated test leads. Remove the
temperature probe when using the test
leads or amp clamp.
Warning: Use only correct type and overvoltage
category rated test leads. Remove the
temperature probe when using the test
leads or amp clamp.
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1. Controls and Functions: (cont.)
Rotary Switch
OFF Turns the 275 completely off.
V Used to measure DC volts.
V Used to measure AC volts.
ΩΩ
Used to measure resistance.
Used to measure continuity.
Selects diode test function.
Selects capacitance test function.
Hz Selects frequency test function.
µµ
A Selects DC microamp function.
Used to measure AC amperage.
TEMP Selects the temperature function.
Input Jacks
COM Black test lead connection for all
tests except temperature, non-contact voltage and AC Amps.
V/ΩΩ/µµA Red test lead connection for all
tests except temperature, non-contact voltage and AC Amps.
D. MEASUREMENT TECHNIQUES
1. Controls and Functions:
Push Buttons
REL Activates Relative mode. Press
and hold for 2 seconds to deactivate.
D-H Holds the reading on the display
until the button is pushed a
second time.
R-H Activates manual ranging. Press
and hold for 2 seconds to return
to auto ranging.
MAX MIN Activates record mode. Press to
cycle between maximum and minimum recorded reading. Press and
hold for 2 seconds to return to
normal mode.
P-H Activates peak hold mode. Used to
capture in-rush current.
NCV Activates the non-contact voltage
detection feature. Press and hold
while holding the jaw close to
electrical wires.
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