General Technologies CT8015 CT8015 Manual Range Digital Multimeter - Manual (Page 2)

4.2.3 DC Current measurement
•
Connect the black test lead to the “COM” socket and red test
lead to the “V Ω mA” socket for below 200mA currents. For
measurements between 200mA and 10 A, the red test lead
should be connected to the 10A socket.
• Set the FUNCTION/RANGE switch to the desired range in the
“A ” function. If the current range is not known beforehand, set
the switch to the highest range and work down as needed.
• Connect the test leads in series with the source or load under
measurement.
• The measurement and polarity of the current will be shown the
LCD Display when the current is flowing through the instrument.
4.2.4 Resistance measurement
CAUTION: Maximum Input Voltage for this function is 250
Vrms for less than 10 Sec., do not exceed this
rating to avoid personal injuries or damage to the
instrument. Also ensure there is no power applied
to the component or circuit and all capacitors are
discharged.
• Connect the black test lead to the “COM” socket and red test lead
to the “V Ω mA” socket.
• Set the FUNCTION/RANGE switch to the desired range in the
“Ω” function. If the resistancege range is not known beforehand,
set the switch to the highest range and work down as needed.
• Connect the test leads across the componet or circuit under
measurement.
• The measurement will be shown the LCD Display when the
probe are connected.
4.3 Other Functions
4.3.1 Diode test
CAUTION: Maximum Input Voltage for this function is 250
Vrms for less than 10 Sec., do not exceed this
rating to avoid personal injuries or damage to the
instrument. Also ensure there is no power applied
to the diode.
• Connect the black test lead to the “COM” socket and red test lead
to the “V Ω mA” socket.
• Set the FUNCTION/RANGE switch to the function.
• Proceed to connect the test leads across the diode observing the
polarity: red probe to the anode (+) of the diode and black test
lead to the cathode (-).
• The measurement will be shown the LCD Display when the diode
is connected.
4.3.2 Continuity Test
CAUTION: Maximum Input Voltage for this function is 250
Vrms for less than 10 Sec., do not exceed this
rating to avoid personal injuries or damage to the
instrument. Also ensure there is no power applied
to the circuit.
• Connect the black test lead to the “COM” socket and red test lead
to the “V Ω mA” socket.
• Set the FUNCTION/RANGE switch to the function.
• Proceed to connect the test leads across the circuit.
•
Buzzer will sound if the circuit resistance is below 100Ω.
4.3.2 Transistor Test
Set the selector switch to “hFE” position, proceed to insert the
transistor leads into the socket, observing to the type of transistor
(NPN or PNP) and pinout. Read hFE on the LCD display.
5. MAINTENANCE
CAUTION: Before attempting battery removal or replacement,
disconnect test leads and remove the instrument
from any energized circuit to avoid shock hazard.
5.1 Battery Replacement
•
To replace the battery, remove the screw of the back Battery Cover
(back of the case) and remove the battery.
• Replace with a new 9 V alkaline battery type NEDA 1604 or
IEC6F22 observing the proper polarity from the diagram on the
label inside the battery compartment.
• Reinstall the battery cover and tighten the securing screw.
5.2 Fuse replacement
•
Remove the screw of the back Battery Cover (back of the case)
and remove the battery.
• Remove the screws at the bottom of the case and of the battery
compartment.
• Replace new fuses only with the identical type and rating.
F1=200mA: Type IEC60127-2 or UL248-14 (5 x 20mm)
fast acting fuse, rated at 200mA/250V.
F2=10A: Type IEC60127-2 orUL248-14 (6.3x25.4mm)
fast acting fuse, rated at 10A/250V.
• Reinstall the back cover, and replace the four screws,
• Reinstall the battery observing the polarity on the battery compart-
ment label, the battery cover and tighten the securing screw.
5.3 Cleaning
Periodically wipe the case with a soft damp cloth and mild household
cleanser. Do not use abrasives or solvents. Ensure that no water gets
inside the instrument to prevent possible shorts and damage.
6. WARRANTY
One year limited warranty, excluding batteries and fuses. For details
see Standard Warranty Information in our webpage or you may request
a printed copy.
© Copyright 2001 General Technologies
General Technologies Corp.
#121 - 7350 72nd Street Tel.: (604) 952-6699
Delta, BC Fax: (604) 952-6690
Canada V4G 1H9 www.generaltechnologies.net