Amprobe Test-Leads - Manuale

1
• This instrument is EN61010-1 certified for Installation Category shown
on the front of the Instrument. Installation Category II and Category III
instruments are recommended for use with local level power distribution,
appliances, portable equipment, etc, where only smaller transient over
voltages may occur, and not for primary supply lines, overhead lines and
cable systems.
• Do not exceed the maximum overload limits per function (see specifica-
tions) nor the limits marked on the instrument itself.
• Exercise extreme caution when: measuring voltage >20V // current >10mA
// AC power line with inductive loads // AC power line during electrical
storms // current, when the fuse blows in a circuit with open circuit
voltage >600 V // servicing CRT equipment.
GENERAL PROCEDURES:
1. When connecting or disconnecting test leads to/from a circuit, always
first turn off power to device or circuit being tested and discharge all
capacitors.
2. If the magnitude of a signal to be measured is not known, set selector
switch to highest range first and reduce until satisfactory reading is
obtained.
3. Strictly observe the max input limits.
DC and AC VOLTAGE MEASUREMENT
1. Connect red test lead to V-Ω Input and black lead to COM.
2. Push the DC/AC button to select either DC or AC. The corresponding
symbol is displayed.
3. Set function/ range switch to the desired voltage range.
4. Touch Probe tips across voltage source (in parallel with circuit).
5. Read value (and polarity for DC measurements – positive implied;
negative indicated) on the LCD.
DC and AC CURRENT MEASUREMENT
1. Connect red test lead to the mA or A input jack for current measure-
ments up to rating shown on front of the meter. Connect black test lead
to COM input jack.
2. Push DC/AC button or select the proper switch position for the DC or AC
mode. The corresponding symbol will appear on the display.
3. Set the Function/Range switch the desired current range, corresponding
to the input jack used.
4. Open circuit in which current is to be measured. Securely connect test
leads in series with the load.
5. Turn on power to circuit being tested.
6. Read current value on LCD.
Note: Each current input has a protective fuse installed. If fuse blows,
replace with fuse of the same rating.
RESISTANCE MEASUREMENT
1. Turn off power to the resistance to be measured and discharge capaci-
tors. Any voltage present during a resistance measurement will cause
inaccurate readings.
2. Connect red test lead to V - Ω Input and black test lead to COM Input.
3. Set Function/Range Switch to the desired position.
4. Connect test leads to resistance or circuit to be measured.
5. Read resistance value on Digital Display. Open circuits will be displayed as
an overload condition.
Note : For low resistance values, measure resistance of test leads first
by contacting probe tips, and deduct this value from actual measurement.
CAPACITANCE MEASUREMENTS
1. Discharge all voltage from the capacitor before measuring its value
(across a 100kΩ resistor).
2. Insert the capacitor in the Cx slots or touch capacitor leads with probe
tips (red test lead connected to Cx input and black lead to COM input).
3. Set the Function/Range switch to the capacitance range that gives the
most accurate reading.
4. Read the capacitance value on the display. If “OL” appears in highest
range, the capacitor is too large to be measured.
Safety Information
P/N 2729779 Rev 002
10/07 English
EXPLANATION OF SYMBOLS

Direct current

Alternating current

Ground connection

Attention! Refer to Operating Instructions

Dangerous voltage may be present at terminals

This instrument has double insulation
CERTIFICATIONS AND PRECAUTIONS
• Inspect DMM, test leads and accessories before every use. Do not use any
damaged part.
• Never ground yourself when taking measurements.
• Do not touch exposed circuit elements or probe tips.
• Always measure current in series with the load – NEVER ACROSS a
voltage source. Check fuse first.
• Never replace a fuse with one of a different rating.
• Do not operate instrument in an explosive atmosphere.
• Verify the Meter’s operation by measuring a known signal of the type
being measured. If in doubt, have the Meter serviced.
• When making voltage measurements, make sure these ranges function
correctly. Take a reading of a known voltage first.
• In Clamp meters, never measure current with the test leads inserted in
the input jacks
• This instrument must not be used on uninsulated conductors at a voltage
greater than 600V AC/DC.
• Do not use this or any piece of test equipment without proper training.
Range overload is indicated by “OL” or “ 1.” in the display with all other digits
blanked. Take immediate steps to remove the cause of overload. Select higher
range. If in highest range, interrupt measurement. Overload indication is
normal in the OHMS range with open circuit or too high a resistance.
MEASURING PROCEDURES