General Technologies CT8012 Ergonomic Digital Multimeter - Manual (Page 2)

4.2.3 DC Current measurement 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
When the battery needs replacement, the battery symbol will
appear in the lower left hand side of the LCD display. To replace the
battery, remove the screw at the back Battery Cover and replace
with a new 9 V alkaline battery type NEDA 1604 or IEC6F22.
5.2 Fuse replacement
To replace the internal fuse, turn the Fuse Cap counter clockwise,
release the Fuse Cap assembly. Take out the blown fuse and replace
with a type IEC60127-2 or UL248-14 (5 x 20mm) fast acting fuse,
rated at 200mA/250V.
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
Set the FUNCTION switch to m A and the RANGE switch to the
200mA position. Proceed to connect test leads IN SERIES with the
load in which current is to be measured, and read the measurement
on the LCD screen.
4.2.4 Resistance measurement
CAUTION: Maximum Input Voltage for these functions 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 and all capacitors are discharged.
Set the FUNCTION switch to Ω/ and the RANGE switch to
desired kΩ range, if the resistance being measured is connected to
a circuit, turn off power and discharge all capacitors before applying
probes.
Proceed to connect the test leads across the component or
circuit under test, and read the measurement on the LCD screen.
4.3 Other Functions
4.3.1 Diode test
Set the FUNCTION switch to Ω/ , and RANGE switch to 2K/
position, 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 (-).
4.3.2 Continuity Test
Set the FUNCTION switch to Ω/ , and RANGE switch to 2K/
Ω/ position, connect test leads across the circuit to be tested.
If resistance is less than approximately 100Ω, the buzzer will be
activated.
4.3.3 Display Hold
A push button switch at the back of the unit is used to hold display
readings during measurements. Pressing and holding the button,
holds the display reading. Releasing the button will resume normal
operation.
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