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DM-810A • DM-820A • DM-830A • DML-430A
9
Using the Features (cont’d)
Note: When using the REC function, pressing RANGE will cause the meter to exit this mode.
DM-820A and DM-830A Only
EF:• Set the meter to any current or voltage function. Press and hold until the meter displays “EF” to
detect the electric field that surrounds current-carrying conductors. Signal strength is displayed as a
series of dashes on the display.
Use the tester’s built-in antenna (located along the top, near the LCD) for tracing live circuits or •
locating a break in a wire.
For more precision, such as distinguishing between current-carrying and ground wires, connect a •
test lead to the + input terminal and use it as a probe for direct contact verification of a signal.
DM-830A and DML-430A Only
Low Impedance AutoCheck™ Mode:• In this mode, the meter automatically selects the proper
measurement based on the input.
If there is no input, “Auto” appears on the display.•
If the voltage is above approximately 1.5 volt DC or 3 volt AC up to the rated 1000 volts, voltage •
is displayed.
If both AC and DC voltages are present, the larger voltage is displayed.•
If no voltage is present and there is resistance less than 60 MΩ, resistance is displayed. If the •
measured resistance is below the continuity threshold (between 20 Ω and 300 Ω), then the
continuity tone will sound.
This mode features low input impedance to mask stray or “ghost” voltage pickup. The input imped-
ance is approximately 3 kΩ at low voltage, increasing to approximately 460 kΩ at 1000 V.
The symbol “LoZ” indicates that the meter is in a low impedance mode. Do not use the AutoCheck™
mode on circuits that could be damaged or activated by such low input impedance. Instead use the
selector to select the high impedance AC or DC volt modes to minimize loading for such circuits.
Range-Lock and Function Feature: While in the AutoCheck™ mode, press the SELECT button
momentarily to lock the displayed function. Press the RANGE button momentarily to lock the dis-
played measurement range.
Energized Circuit Alert: If the resistance mode is locked in the AutoCheck™ mode and the leads
are placed across an energized circuit, the meter will emit an audible warning tone.
T1-T2:• Press momentarily to select the desired temperature display: T1, T2, T1
T2
, or T1-T2
T2
.
dBm-Ω (DM-830A only): •In dBm mode, press momentarily to select the reference impedance. Refer
to the “Specifications” section for the available values.
Blue Feature Buttons (DML-430A only): •Refer to the “Data Storage Function” section for an
explanation of these features.
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