UEi Test Instruments DL99B - Manual (Page 3)

6. Peak Hold Push-Button: Used to capture the highest AC or DC
inductive amp reading.
7. Clamp Lever: Opens and closes current clamp jaw.
8. DC A Zero: Used to establish the “zero reference” when preparing
to make DC amperage measurements. Magnetic fields in the iron
core of the jaws will be interpreted as a current reading if not
electronically compensated when measuring DC amps.
9. Rotary Function Switch: Used to power the meter on and off, or
to select on of these available measurement functions:
• Inductive AC or DC current using the clamp
• Volts AC or DC at the test lead inputs
• Resistance or continuity at the test lead inputs
10. Off Position: Turns the meter off. Always store your meter in the
off position. If the meter will not be used for a month or more,
remove the batteries.
11. Display: Communicates function, range, and value information to
the user.
12. Common Terminal: The black test lead is plugged into this
terminal to supply the ground or “low” reference for voltage and
resistance measurements.
13. Volt / Ohm ( Ω) Terminal: The red lead is plugged into this
terminal for AC/DC volts, ohms, and continuity measurements.
14. Maximum Input Statements: MAX 600V indicates that a
maximum of 600 Volts can be applied between the two terminals or
between earth ground and any terminal for CAT III, 1000 V CAT II.
LCD Display Functional Description
1. Peak Hold: Indicates the meter is displaying the maximum inductive
AC or DC current value recorded.
2. Continuity: Indicates the meter is in the continuity measurement
mode and will sound a tone when measuring resistance below
approximately 40 ohms.
3. Hold: Indicates the value displayed is frozen on screen (the “DATA
HOLD” push-button is pressed).
4. BAT (Low Battery Indicator): This symbol appears when the
battery needs replacement.
Note: A low battery will adversely affect accuracy
Controls and Indicators
1. Clamp: Wrapped around a single conductor when measuring
inductive AC or DC current. Opens to 1-1/4” (32 mm).
CAUTION!
The clamp uses a high-tension spring to close the jaw. DO NOT allow
fingers or objects to become pinched in the base as jaw closes.
2. Conductor Alignment Marks: Used to aid in the visual
alignment of a conductor when measuring inductive amperage.
Greatest accuracy is achieved when the conductor inside the clamp
is centered at the intersection of these marks.
3. Hand Guard: Used as a point of reference for the operator’s safety.
WARNING!
Always keep your hands and fingers behind the hand guards when
measuring current on exposed conductors. Contact may result
in serious safety
ground or “low” reference for all measurements.
4. Data Hold Push-Button: Freezes the value displayed on the
digital read-out.
5. Range / Worklight - Backlit display Push-Button: Used to
switch from low to high range in the function selected. Note that AC
and DC voltage auto-range from 400 to 1000 volts when more than
400 volts are applied. Push and hold for 5 seconds to activate the
worklight and back light of the display.
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