PROF 502212370, Инструкция по эксплуатации

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8 9
RESISTANCE MEASUREMENTS
REPLACING THE BATTERIES
REPLACING THE FUSES
CONTINUITY CHECK
DIODE TEST
BATTERY TEST
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
WARNING: To avoid electric shock, disconnect the test leads from any
source of voltage before removing the battery door.
WARNING: To avoid electric shock, disconnect the test leads from any
source of voltage before removing the fuse door.
WARNING: To avoid electric shock, do not operate your meter until the
battery door is in place and fastened securely.
WARNING: To avoid electric shock, never measure continuity on circuits
or wires that have voltage on them.
1. Set the function switch to the highest Ω position.
2. Insert the black test lead banana plug into the negative
(COM) jack
Insert the red test lead banana plug into the positive Ω
jack.
3. Touch the test probe tips across the circuit or part under
test. It is best to disconnect one side of the part under
test so the rest of the circuit will not interfere with the
resistance reading.
4. Read the resistance in the display and then set the
function switch to the lowest Ω position that is greater than the actual or
any anticipated resistance. The display will indicate the proper decimal
point and value.
1. When the batteries become exhausted or drop below the operating
voltage, “BAT” will appear in the right-hand side of the LCD display. The
batteries should be replaced.
2. Follow instructions for installing batteries. See the Battery Installation
section of this manual.
3. Dispose of the old batteries properly.
1. Disconnect the test leads from the meter and any item under test.
2. Open the fuse door by loosening the screw on the door using a Phillips
head screwdriver.
3. Remove the old fuse from its holder by gently pulling it out.
4. Install the new fuse into the holder.
5. Always use a fuse of the proper size and value (0.2A/250V fast blow for
the 200mA range, 10A/250V fast blow for the 10A range).
6. Put the fuse door back in place. Insert the screw and tighten it securely.
1. Set the function switch to the position.
2. Insert the black lead banana plug into the negative (COM) jack
Insert the red test lead banana plug into the positive (
Ω ) jack.
3. Touch the test probe tips to the circuit or wire you wish to check.
4. If the resistance is less than approximately 30
Ω , the audible signal will
sound. If the circuit is open, the display will indicate “1”.
1. Insert the black test lead banana plug into the negative COM jack and the
red test lead banana plug into the positive diode jack.
2. Turn the rotary switch to the / position.
3. Touch the test probes to the diode under test. Forward voltage will
indicate 400 to 700mV. Reverse voltage will indicate “I”. Shorted devices
will indicate near 0mV. Shorted devices will indicate near 0mV and an
open device will indicate “I” in both polarities.
1. Insert the black test lead banana plug into the negative COM jack and the
red test lead banana plug into the positive V jack.
2. Select the 1.5V or 9V BAT position using the function select switch.
3. Connect the red test lead to the positive side of the 1.5V or 9V battery and
the black test lead to the negative side of the 1.5V or 9V battery.
4. Read the voltage in the display.
Good Weak Bad
9V battery: >8.2V 7.2 to 8.2V <7.2V
1.5V battery: >1.35V 1.22 to 1.35V <1.22V
WARNING: To avoid electric shock, do not operate your meter until the fuse
door is in place and fastened securely.