General Tools and Instruments DMM51FSG - Manual (Page 7)

C-3 MEASURING DC CURRENT
1) Connect the black test lead to “COM” jack. When measuring 2A or below,
connect the red test lead to “A” jack. When measuring 10A or below, connect
the red test lead to “10A” jack.
2) Set the rotary switch to “A ”.
3) Connect the test leads in series with the object to be measured, the LCD
display the measuring value and polarity of red test lead.
CAUTION
1) If magnitude of the current is unknown, always start with the highest range
and reduce until satisfactory reading is obtained.
2) If “1” is shown on the LCD, which means the meter is overloaded, then set the
measuring range to higher.
C-4 MEASURING AC CURRENT
1) Connect the black test lead to “COM” jack. When measuring 2A or below,
connect the red test lead to “A” jack. When measuring 10A, connect the red
test lead to “10A” jack.
2) Set the rotary switch to“A~”.
3) Connect the test leads in series with the object to be measured.
CAUTION
1) Please refer to “DC Current Caution” 1, 2.
C-5 MEASURING RESISTANCE
1) Connect the black test lead to “COM” jack and red test lead “
Ω” jack.
2) Set rotary switch to“
Ω”.
3) Connect the test leads across with the object to be measured.
CAUTION
1) If “1” is shown on the LCD, which means the meter is overloaded, then set a
higher measuring range. If resistance is above 1M
Ω, the reading will only be
steady after a few seconds which is normal for measuring high value of
resistance.
2) “1” is displayed when open circuit or no input.
3) Make sure all objects, circuit and components to be measured are without
voltage.
4) 200M
Ω short circuit has 10 digits which need to be deducted after the reading
when making measurement. For example, when measuring 100M
Ω, it displays
101.0, 10 digits need to be deducted.
C-6 MEASURING DIODE AND CONTINUITY BEEPER
1) Connect the black test lead to “COM” jack and red test lead to “V” jack.
2) Set the rotary switch to “
”
3) Connect the test lead across with the object being measured. LCD appears the
measuring value.
4) Connect the test lead to two ends of the object being measured, the beeper
sounds if the resistant value between the two ends is less than 70
Ω.
DMM51FSG Manual FINAL-091908:Layout 1 9/19/08 4:03 PM Page 7