Equus 3320 - Auto-Ranging DMM - Manual (Page 11)

NOTE: To measure current on a particular circuit, you must open
up the circuit and connect the test leads in series with the circuit
before a reading can be obtained.
4. Disconnect one end of the wire or device, from the circuit
where current will be measured.
5. Place the RED test lead on the disconnected wire and place
the BLACK test lead at the location from which the wire was
disconnected (series connection).
6. Reconnect the battery, or apply power to the circuit being
tested.
7. Read the results on the display.
CAUTION: After the test is completed, shut the power off to
the circuit before removing the test leads and before recon-
necting any disconnected wires or devices.
NOTE: If the reading obtained is a negative number, reverse the
test leads.
F. BATTERY TEST
1. Plug the RED test lead into the "BAT." jack of the multime-
ter; plug
the BLACK test lead into the "COM" jack.
2. Determine the voltage rating of the battery to be tested.
3. Set the meter’s Function/Range Selector Switch to the
desired "Battery Test" range (see Controls and Indicators,
Item 12).
4. Place the RED test lead on the positive post of the battery
under test; place the BLACK lead on the negative post.
NOTE: If a battery is completely dead, or nearly dead (below
10% of its rated voltage), the red LED will not light.
5. Read the results using the display and the LEDs:
•
Green = fully charged (good battery)
• Yellow = low (questionable)
•
Red = discharged (bad battery)
NOTE: Battery life is directly proportional to the current
draw/load of the device that the battery is powering. The three
LEDs on the multimeter represent battery state-of-charge aver-
ages for the most commonly used devices.
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