User Guide

Handling the Cap
Handling the Test Leads
Auto/Manual Range Function ( V, only)
Autoranging: The Autoranging function automatically selects
the optimum measurement range.
Turning on the power also switches Autoranging on
(AUTO
lights up).
The range automatically switches up when the display shows
4200 counts or more, and down when the display shows less
than 400 counts. (A beep sound is generated when the 3246 is
switched to a different range.)
Manual ranging: Set a range manually.
Turn on the power while pressing the select button (AUTO is
turned off).
Range selection: Each pressing of the select button selects the
next larger range. After the largest range, pressing the select
button again returns you to the smallest range.
Press and hold down the select button (for about 1 second) to
select AC or DC in manual ranging mode, or select between
resistance measurement, continuity check, and diode check in
manual ranging mode.
The Manual ranging function is active until the 3246 is turned off.
Hold Function [ ] (Available for any measurement function.)
Press HOLD to hold the measurement value ( lights up).
In hold mode, the select button operation, the warning beep for
voltage measurement overflow, and beep for diode check judg-
ment are disabled.
To cancel the hold mode: Press HOLD again.
Auto Power Save Function [APS]
(Available for any
measurement function.)
When the measurement product is turned on, it automatically
enters Auto Power Save mode (APS lights up).
Approximately 10 minutes after completing final operation, the
measurement product automatically enters Power Save mode
with a beeping sound.
Exiting the Power Save State: turn off the power once.
Disabling Auto Power Saving: turn on the power while pressing
HOLD. (APS is turned off)
Overflow Warning Function [OF]
( V only)
When the measured value exceeds the maximum indication, a
beep sound is generated (OF lights up).
This function is disabled in hold mode.
Penlight/LCD Backlight Function
• ON: Press and hold down HOLD. The penlight and LCD
backlight will light. (The hold mode is not influenced)
• OFF: The lights will go off automatically in about 10 seconds.
Operating the Function Selector or a key will turn off the
lights in about 10 seconds after the last key operation.
• Hold down HOLD to keep the lights on.
Parts Names
Observe the following to avoid damage to the product.
• Do not pull the cap with excessive force.
• Replace the cap when not using the product.
• Selects DC/AC ( V)
(Press the select button for at least
1 second in manual ranging mode.)
• Selects mode ( ).
(Press the select button for at least
1 second in manual ranging mode.)
• Changes to the manual range func-
tion. (Turn on the power while
pressing the select button.)
• Selects range (in manual ranging
mode).
OFF
Power Off (Power is turned ON in any position other than OFF.)
V
: DC voltage function (DCV)
: AC voltage function (ACV)
Select with the select button
Resistance function
Select with the select buttonContinuity Check function
Diode Check function
Black (−)
Red (+)
• Holds the measurement
value ( lights up).
• Cancels the Auto-Power
Save function (APS).
(Turn on the power while
pressing HOLD.)
• Turns on the light.
(Press HOLD for at least
1 second.)
Penlight
Select Button
LCD DisplayFunction Selector
HOLD Button
Barrier
Test Leads
Hole for attaching your own
strap for greater portability.
LCD Display
Indicates Continu-
ity Check function
Indicates during
Resistance mea-
surement and
Continuity check
Indicates during
Voltage measure-
ment
Indicates Auto Power Save is enabled
Indicates Diode Check function
Indicates DC
voltage function
Indicates AC
voltage function
Indicates Autoranging
Indicates HOLD function
Lights up when the voltage drops below
the battery accuracy guarantee voltage
(2.3 V±0.15 V)
When using the 3246, remove the
cap and securely fasten the cap to
the rear, as shown in the figure.
Cap
When removing the cap, be careful
not to prick your finger with the tip
of the lead.
Pull
When storing the 3246 test lead (black), be sure to wind the
lead around the protrusion on the rear.
Functions
Measurement Procedures
Observe the following precautions to avoid electric
shock.
• Do not grip the 3246 or test lead between the barrier
and the tip during operation (
See "Parts Names").
• Disconnect the test leads from the measurement object
before handling the Cap.
• Always verify the appropriate setting of the Function
Selector before connecting the test leads.
• Disconnect the test leads from the measurement object
before switching the Function Selector.
• Never apply voltage to test leads when the Resistance,
Continuity or Diode Check functions are selected.
Doing so may damage the product and result in per-
sonal injury. To avoid electrical accidents, remove
power from the circuit before measuring.
Voltage Measurement
• The maximum input voltage is 600 V DC/ 600 Vrms(sin)
or 3x10
6
V•Hz. Attempting to measure voltage in excess
of the maximum rating could destroy the product and
result in personal injury or death.
• To avoid electrical shock, be careful to avoid shorting
live lines with the test leads.
• For safety, test lead connections must always be made
at the secondary side of a circuit breaker.
• The maximum rated voltage between input terminals
and ground is 600 V DC/AC. Attempting to measure
voltages exceeding 600 V with respect to ground could
damage the product and result in personal injury.
Resistance Measurement
Continuity Check
1. Move the Function Selector to the V posi-
tion.
To select DC or AC ( ), use the select
button. (During manual ranging, press the
select button for at least 1 second.)
2. Connect the test leads to the measure-
ment object, and read the indicated value.
AC Voltage
Measurement
DC Voltage
Measurement
1. Move the Function Selector to the
position.
2. Connect the test leads to the measure-
ment object, and read the indicated value.
1. Move the Function Selector to the
position and press the select button. (
lights up)
(During manual ranging, press the select
button for at least 1 second.)
2. Connect the test leads to the measure-
ment object.
When the continuity (threshold: 50±30 Ω
or less) is established, the beeping
sounds.
Diode Check
When the diode is connected in the forward direction, the dis-
play shows “-00-” with a beeping sound.
(When the forward voltage is out of the 0.3 V to 2.0 V range,
the results may be incorrect.)
When connection is reversed, the display shows “----.”
If displays for both directions are the same, the following may
have occurred:
• The diode has malfunctioned.
• The forward voltage of the diode is out of the measurement
range.
Replacing the Batteries
• To avoid electric shock when replacing the batteries,
first disconnect the test leads from the object to be mea-
sured.
• Before replacing the batteries, make sure that the Func-
tion Selector is OFF.
• When replacing the batteries, be sure to insert them
with the correct polarity. Otherwise, poor performance
or damage from battery leakage could result.
• Replace batteries only with the specified type. (Coin-
shaped lithium battery CR2032)
• After replacing the batteries, replace the cover and
screws before using the product.
• Keep batteries away from children to prevent accidental
swallowing.
• To avoid the possibility of explosion, do not short cir-
cuit, disassemble or incinerate batteries.
• Handle and dispose of batteries in accordance with
local regulations.
1. Move the Function Selector to the
position and press the select button twice.
( lights up)
(During manual ranging, press the select
button for at least 1 second.)
2. Connect the test leads to the measure-
ment object.
AnodeCathode
Forward
direction
Necessary tool:
• Phillips screwdriver
• Coin-shaped lithium battery (CR2032)
1. Turn OFF the power.
2. Turn the 3246 over and use a
Phillips screwdriver to remove
the one retaining screw from
the battery case.
3. Remove the battery case and
mount a new CR2032 battery.
Make sure the polarity is cor-
rect.
4. Mount the battery case and
tighten the retaining screw.
Screw
Battery case
2
3
4