UEi Test Instruments MCP4 - Manual (Page 2)

Introduction
The MCP4 includes 5 amperage ranges to give you precise readings on
low or high amp circuits. It also includes volts and ohms readings to
give you the complete picture of your circuit path.
Features include
• 10 ranges
• 300 Amps AC
• 750 Volts AC
• Resistance to 1000 ohms
• Color-coded, high res scale-plate
• Pointer-lock switch (data hold)
• 1-1/4” jaw capacity
Safety Notes
Before using this meter, read all safety information carefully. In
this manual the word "WARNING" is used to indicate conditions
or actions that may pose physical hazards to the user. The word
"CAUTION" is used to indicate conditions or actions that may
damage this instrument.
• Always follow industry standard safety practices including protective
clothing, gloves and safety glasses when appropriate
• Do not attempt to measure any voltage that exceeds the
ca t e g o ry based rating of this meter
• Do not attempt to use this meter if either the meter or the test
leads have been damaged. Turn it in for repair at a qualified
repair facility
• Ensure meter leads are fully seated by making a quick continuity
check of the leads prior to making voltage measurements
• Keep your fingers away from the test lead’s metal probe
contacts when making measurements. Always grip the leads behind
the finger guards molded into the probes
• Use a current clamp adapter when measuring current that may
exceed 10 amps. See the accessories in UEi’s full-line ca t a l o g
• Do not open the meter to replace batteries or fuses while the
probes are connected
WARNING!
Exceeding the specified limits of this meter is dangerous and can
expose the user to serious or possibly fatal injury.
• Voltages above 60 volts DC or 25 volts AC may constitute a
serious shock hazard
• Always turn off power to a circuit (or assembly) under test
before cutting, unsoldering, or breaking the current path -
Even small amounts of current can be dangerous
• Always disconnect the live test lead before disconnecting the
common test lead from a circuit
• In the event of electrical shock, ALWAYS bring the victim to
the emergency room for evaluation, regardless of the victim’s
apparent recovery - Electrical shock can cause an unstable heart
rhythm that may need medical attention
• Higher voltages and currents require greater awareness of
physical safety hazards - Before connecting the test leads; turn
off power to the circuit under test; set the meter to the desired
function and range; connect the test leads to the meter first, then
to the circuit under test. Reapply power
• If any of the following indications occur during testing, turn
off the power source to the circuit under test:
• Arcing
• Flame
• Smoke
• Extreme Heat
• Smell of Burning Materials
• Discoloration or Melting of Components
CAUTION!
Do not attempt to remove the meter leads from the circuit under test.
The leads, the meter, or the circuit under test may have degraded to
the point that they no longer provide protection from the voltage and
current applied. If any of these erroneous readings are observed,
disconnect power immediately and recheck all settings and connections
C o n t rols and Indicators
1. Selector Switch: Is used to select the circuit function and range.
It is good practice to start with the highest range setting of the
“SELECTOR” switch for a particular function if the magnitude of
the function is unknown.
2. OHM ADJ: Used only on the “OHMS” function. The purpose of
this control is to calibrate the MCP9A to compensate for changes
in the voltage of the internal 1.5 V battery.
3. Lock Switch: Is located at the upper left side of the scale plate. It
is used to secure the pointer at the last reading when measurements
must be made in a confined or difficult-to-read loca t i o n .
4. Mechanical Zero Adjust: Is a plastic screw located on the meter
face just beneath the “LOCK” switch. This adjustment is used to set
the pointer to the zero index mark at the left side of the scale plate.
5. Input Jacks: Are a special twist lock banana type. The twist lock
feature prevents the test leads from accidentally separating from the
jacks during the taking of AC Voltage measurements.
6. Volts: The jacks located on the left side of the MCP4 are used for
taking AC and DC Voltage measurements.
7. OHMS: The jacks located on the right side of the MCP4 are used
for taking resistance measurements.
MCP4-MAN P. 1