HOW
TO'
MAKE
MEASUREMENTS
Before making any measurements always examine the instrument
and accessoriesused with theinstrumentfordamage, contamination
(excessivedirt,grease, ect.) and defects. Examine the test leads for
cracked orfrayed insulation and make surethe lead plugs fit snugly
into the instrumentjacks. If any abnormal conditions exist do not
attempt to make any measurements.
VOLTAGE RlEASUREMENTS
1. Insert the black and red test leads into the COM and V-R input
terminals respectively.
2. Select the desired AC voltage range (V-
),
or DC voltage range
(V-).
WARNING
To avoid possible electric shock, instrument damage and
/
or
equipment damage,donot attempt totakeany voltagemeasurements
if the voltageis above
1
OOOVdc
/
750Vac. lOOOVdc
and
750Vacare
the maximum voltages that this instrument is designed to measure.
The"COM"terminal potential shouldnot,exceed500Vmeasured to
ground.
A
3.
Connect thetest lead tips in parallel with the circuit to bemeasured
(e.g. across a load or power supply). Be careful not to touch any
energised conductors. Note the reading.
4.
When allmeasurements arecompleted, disconnectthe test leadsfrom
the circuit under test. Remove test leads from the multimeter.
For
DC
voltage readings, the RED lead tip should beconnected to
the positiveside of thecircuit, the BLACK leadto thenegativeside.
A minussign on the left hand sideof theLCDwill appear if theleads
areconnected the other way round.
CURRENT MEASUREMENTS
These are made in series with the test circuit. All the current to be
measured flows through the multimeter.
WARNING
Donot attempt to measurecurrents inhigh energy circuitscapable
of delivering greater than 600V. Since the fuse is rated at 600V
damageor injurycould occur. The20Ainput terminal isprotected
by a20AI600Vhigh energy,fastblow fuse. The
mA
input terminal
is protected by a 500mAl600V fast blow fuse.
Do not exceed the limits of each current input terminal. This is 20A
(maximum time limit of 30seconds for currents greater than 10A)for
the 20A terminal and 200mA for the mA terminal.
All current ranges are fused. If a current greater than 20A on the 20A
rangeorgreater than500mA onall otherranges flows, thefusewillblow
causing an open circuit between the current measuring terminals.
1. Insert the BLACK test lead in the COM input terminal.
2. Formeasuring currents less than 200mA, connect the REDtest lead
to the mA input terminal. For measuring currents between
200mA
and 20A connect the RED test lead to the 20A terminal.
3.
Select the desired AC current range or DC current range.
4.
Switch OFFordisconnectthe circuitto bemeasured from all power
:
sources,connect themultimeter in serieswith theconductorin which
the current to be measured flows.
5. Switch ON the circuit. Note the reading.
6. Switch OFFordisconnect the circuitand removethetest leads from
multimeter.
