To
Measure
Safety Warnings and Cautions
Rotate
Dial To
“SEL”
Select Button Operation
Connect Leads
to Input Jacks
COM
INPUT
AC/DC Voltage
WARNING : Don’t measure any RMS voltage higher than 600V DC or AC, to prevent injury or damage to
meter and equipment.
• Display shows voltage polarity (connected with red test probe) when measuring DC voltage.
• When you can’t determine the size range of signal to be tested, please switch the function measuring range to
the maximum position, then gradually select lower ranges until the correct range is found.
Toggles between
AC (
) & DC (
) Voltage
BLACK
LEAD
RED
LEAD
AC Current
600A
WARNING : To prevent injury or damage to meter or equipment, do not make current measurements if
voltage exceeds 600V.
• Use trigger to open clamp head. Measure one lead/wire at a time. Measuring multiple wire will cause invalid
readings. Align in the center of the clamp head for accurate readings.
• When you can’t determine the size range of signal to be tested, please switch the function measuring range to
the maximum position, then gradually select lower ranges until the correct range is found.
OPEN
OPEN
AC Current
6A to 60A
OPEN
OPEN
Resistance
WARNING : When measuring resistance or circuit continuity, to avoid injury or meter damage, turn off the
power to circuit and discharge all capacitors.
• The resistance measured on a circuit is usually different from the rated value of resistance. This is because
the test current of the meter will flow through all possible channels between test probes.
• When measuring the resistance more than 1MΩ, the reading will be stable after several seconds. This is
normal for high resistance measuring.
• When there is no input (for example, open circuit), the display will show “OL”, which means that the measured
value is out of range.
Toggles between
Resistance ( )
Capactiance ( )
Diode (
)
Continuity ( )
BLACK
LEAD
RED
LEAD
Capactiance
WARNING : When measuring capacitance, to avoid injury or meter damage, turn off the power to the circuit
to be measured discharge all capacitors.
• When measuring bulk capacitors with this meter, readings will stabilize after a few seconds.
BLACK
LEAD
RED
LEAD
Diode
WARNING : When measuring diodes, to avoid injury or meter damage, turn off the power to the circuit to be
measured discharge all capacitors.
• Insert red probe to “INPUT” and insert black probe to “COM” jack. At this time, red probe polarity is “+”.
• Red probe connects to the anode of diode and black probe is connects to the cathode of diode. Display will
display forward voltage drop.
BLACK
LEAD
RED
LEAD
Continuity
WARNING : When measuring resistance or circuit continuity, to avoid injury or meter damage, turn off the
power to the circuit to be measured and discharge all capacitors.
• Connect probe to two points of circuit.
• If the measured circuit resistance is less than about 50Ω, the buzzer will sound continuously. Between 50Ω to
90Ω the buzzer may sound. Over 90Ω there will be no audible tone.
BLACK
LEAD
RED
LEAD
Non-Contact
Voltage
• Do not use non-contact voltage detector to determine if there is voltage in the wire. Detection operation could
be affected by socket design, insulation thickness, type and other factors.
• Voltage indicator light may also light when voltage is present on the meter’s input jack or from external
interference sources such as motors, flashlights etc.
PRESS
OPEN
OPEN
Temperature
Fahrenheit
WARNING : Don’t input voltage higher than 30V in temperature measurement position, to prevent electric
shock or meter damage.
- Temp
LEAD
+ Temp
LEAD
Temperature
Celsius
- Temp
LEAD
+ Temp
LEAD
WARNING
To avoid electric shock or personal injury, please read SAFETY INSTRUCTIONS, WARNINGS
and CAUTIONS carefully before use.
SAFETY INSTRUCTIONS: Read Before Use
The UTL291 digital clamp-on meter has been designed and evaluated according to International Electro
Safety Standard IEC-1010 (61010-1@IEC: 2001) concerning safety requirements for electronic measuring
instruments and hand-held digital multimeters. It meets the requirements for CAT III 600V of IEC1010 &
pollution degree 2.
▶
Users should use the meter strictly according to the provisions of this manual. Otherwise, the war-
ranty for the meter may become invalid.
▶
In the user guide,
WARNING
indicates possible dangerous conditions for the user.
▶
In the user guide,
CAUTION
indicates possible damage to the meter could occur.
WARNING
To avoid possible electric shock or personal injury as well as damage to the meter or measured objects,
please use the meter according to the following procedure methods:
▶
Check the case before using the meter. Don’t use the meter when the case is damaged. Check to see
if the case is cracked or lacks plastic parts. Please pay special attention to joint insulating layer.
▶
Check to see if the test leads have insulation damage or exposed bare metal. Check test lead continu-
ity. If the test leads are damaged, please replace them with a new set before using the meter.
▶
Measure known voltage with the meter to verify that the meter is working properly. If the meter is
working abnormally, stop using it immediately. A protective device may be damaged. If there is any
doubt, please have the meter inspected by a qualified technician.
▶
Do not test voltage exceeding rated voltage marked on the meter.
▶
When testing voltage exceeding 30v AC voltage RMS, 42v AC peak or 60v DC, be particularly careful
to avoid electric shock.
▶
When measuring, use correct jack, function and measuring range.
▶
Do not use the meter in explosive gas, vapor or dusty environments.
▶
When using the probe, fingers should be behind the probe protection guard device.
▶
When connecting circuits, please connect the common test line first, then connect the charged test
line. When disconnecting circuits, please disconnect the charged test line first, then disconnect the
common test line.
▶
When measuring do not touch unused input jacks, exposed bare wires, connectors or circuits being
measured.
▶
If the meter is not used in accordance with the instructions, the meter’s safety protection function
may become invalid.
▶
When the battery low voltage indicator “
” displays, replace the battery at once. A low battery
will cause meter reading errors and may result in electric shock or personal injury.
▶
Before opening case or battery cover, remove the test leads from the meter.
AUTOMATIC POWER-OFF
The meter will automatically enter sleep mode after 30 minutes of no activity. To disable auto power-off
press and hold “SEL” while turning the meter on.
GENERAL MAINTENANCE
Warning
To avoid personal injury or damage to the meter, DO NOT wet the inner parts of the meter.
Clean the meter case with damp (not wet) cloth and a small amount of detergent. Do not use abrasives
or chemical solvents.
REPLACE BATTERIES
Warning
To avoid incorrect readings and possible electric shock or personal injury, when “
”
appears on the display, replace the battery immediately. Turn off the meter and disconnect the test probe
from the meter before opening the back cover to replace batteries. Gain access to batteries by using a
screwdriver to loosen the battery cover screw on the back of the meter and removing the cover.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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