Instruction Manual
3-in-1 E Tester
Model: N73BZ
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Features
• 3½ digit (2000 count) LCD display
• Built-in non-contact AC voltage detector
plus flashlight
• Double moulded housing
• CATIII 1000V
• 200mA/500V resettable fused current inputs and
overload protection on all ranges
• Autoranging with auto power off
Safety
International Safety Symbols
2
This symbol, adjacent to another symbol or terminal,
indicates the user must refer to the manual for further
information.
This symbol, adjacent to a terminal, indicates that, under
normal use, hazardous voltages may be present.
Double insulation
Safety Precautions
1. Improper use of this meter can cause damage, shock, injury or death.
Read and understand this users manual before operating the meter.
2. Make sure any covers or battery doors are properly closed and secured.
3. Always disconnect the test leads from any voltage source before
replacing the battery or fuses.
4. Do not exceed the maximum rated input limits.
Input Limits
Function Maximum Input
V DC or V AC 600V DC/AC
µA,
mA AC/DC
200mA/500V fast acting
resettable fuse
Resistance, diode &
continuity test
600V DC/AC
5. Use great care when making measurements if the voltages are greater
than 25Vac rms or 35Vdc. These voltages are considered a shock
hazard.
6.
Always discharge capacitors and remove power from the device under
test before performing diode, resistance or continuity tests.
7. Remove the battery from the meter if the meter is to be stored for long
periods.
Meter Description
1. Non-contact AC voltage detector probe tip
2. Non-contact AC voltage indicator light
3. 3½ Digit (2000 count)
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4. MODE button
5. Function switch
6. Flashlight
7. Flashlight button
8. Data Hold button
9. Battery cover
10. Test leads
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Specifications
Electrical Specifications:
Function Range Accuracy
200mV,
±(0.5% rdg + 3d)
DC Voltage
2V, 20V, 200V, 600V
±(1.2% rdg + 3d)
2V, 20V
±(1.0% rdg + 8d)
AC Voltage
40-400Hz
200V, 600V
±(2.3% rdg + 10d)
200µA, 2000µA
DC Current
20mA, 200mA
±(2.0% rdg + 8d)
200µA, 2000µA
AC Current
20mA, 200mA
±(2.5% rdg + 10d)
200Ω ±(0.8% rdg + 5d)
2kΩ, 20kΩ, 200kΩ ±(1.2% rdg + 5d)
2MΩ ±(5.0% rdg + 5d)
Resistance
20MΩ ±(10.0% rdg + 5d)
Max input voltage:
600V AC/DC
Diode test: Test current 1mA max., open circuit voltage of 1.5V
typical
Continuity check: Audible signal if the resistance is <150Ω
Display: 2000 count 3½ digit LCD
Over range indication: LCD displays “OL”
Polarity: Minus (-) sign for negative polarity.
Low battery indication: “BAT” symbol indicates low battery condition
Input Impedance:
>7.5MΩ (Vdc & Vac)
AC Response
: Average responding
ACV Bandwidth:
50Hz to400Hz
Auto power off:
15 minutes (approximately)
Fuse:
mA, µA ranges; 0.2A/500V
fast acting resettable
fuse
5
Batteries:
Two 1.5V AAA
Operating Temperature: 0
o
C to 40oC (32oF to 104oF)
Storage Temperature: -10
o
C to 50oC (14oF to 122oF)
Weight: 145g
Size: 104 x 55 x 32.5mm
Standard: IEC61010 CAT III 1000V Pollution degree II, CE
Approved
Operation
AC/DC VOL TAGE ME ASUREMENT S
CAUTION: Do not measure AC/ DC voltages if a motor on the
circuit to be measured is being switched ON or OFF. Large
voltage surges may occur that can damage the meter.
1. Set the function switch to the green V position.
2. Press the MODE button to indicate “DC” or “AC” on the
display.
3. Place the black test probe tip to the negative side of the
circuit.
Place the red test probe tip to the positive side of the circuit.
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. Read the voltage in the display
DC/AC CURRENT MEASUREMENTS
1. Set the function switch to the µA/mA position.
2. For current measurements up to 2000µA DC/AC, set the
function switch to the mA position
3. Press the MODE button to indicate “DC” / “AC” on the
display.
4. Remove power from the circuit under test, then open up the
circuit at the point where you wish to measure current.
5. Place the black test probe tip to the negative side of the
circuit.
Place the red test probe tip to the positive side of the circuit.
6. Apply power to the circuit.
7.
Read the current in the display
NOTE: 0.2A/500V fast acting resettable fuse current inputs
and overload protection on mA, µA ranges. No replacement
required.
RESISTANCE MEASUREMENT
WARNING: To avoid electric shock, disconnect power to the
unit under test and discharge all capacitors before taking any
resistance measurements. Remove the batteries and unplug
the line cords.
1. Set the function switch to the Ω position.
2. Press the MODE button to indicate Ω on the display.
3.
Place the test probe tips across the circuit or part under test. It
is best to disconnect one side of the part under test so the rest
of the circuit will not interfere with the resistance reading.
4. Read the resistance in the display
CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity
on circuits or wires that have voltage on them.
1. Set the function switch to the Ω position.
2. Press the MODE button to indicate on the display
3. Touch the test probe tips to the circuit or wire you wish to check.
4. If the resistance is less than approximately 150Ω, the meter will
bleep. If the circuit is open, the display will indicate “OL”.
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DIODE TEST
1. Set the function switch to the Ω position.
2.
Press the MODE button to indicate on the display.
3.
Touch the test probes to the diode under test. Forward voltage
will typically indicate 0.4 to 0.7V. Reverse voltage will indicate
“OL”. Shorted devices will indicate near 0V and an open device
will indicate “OL” in both polarities
Non-Contact AC Voltage Measurements:
WARNING: Risk of electrocution. Before use, always
test the voltage detector on a known live circuit to
verify proper operation
1. Hold the probe tip near to the electrical supply.
2. If AC voltage is present, the detector light will illuminate.
NOTE: Electrical cable often gets twisted. For best results, rub
the probe tip along a length of the cable to ensure the tip
is close to the live conductor.
NOTE: The detector is highly sensitive. Static electricity or other
sources of energy may randomly trip the sensor. This is
normal.
Hold Button
The Data Hold function allows the meter to “freeze” a measurement
for later reference
1. Press the “DATA HOLD” button to “freeze” the display, the
“HOLD” indicator will appear.
2. Press the “DATA HOLD” button to return to normal operation.
Flashlight
Press and hold the top button to turn the flashlight on. Release the
button to turn the flashlight off.
AUTO POWE R OFF
The auto off feature will turn the meter off after 15 minutes.
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REPLACING THE BATTERY
1. Undo the screw and remove the bottom cover.
2. Replace the old batteries with 2 new
1.5V AAA
batteries (Order Code
L42AL).
3. Replace the bottom cover and tighten the screw.
REPLACING THE FUSE
1.Disconnect the test leads from the meter.
2.Remove the test leads holder and top cover screw.
3.Lift the center circuit board straight up from the connectors to
gain access to the fuse holders.
4. Remove the old fuse and place the new fuse into the holder.
5.Always use a fuse of the proper size and value (0.2A/250V fast
blow for the 200mA range).
6.Align the center board with the connectors and gently press into place.
7.Replace and secure the rear cover and screw.
WARNING: To avoid electric shock, do not operate your meter
until the fuse cover is in place and fastened securely.
Notice to customers
This symbol on the battery
indicates that the battery is to be
collected separately.
The following apply only to users
in European countries.
• This battery is designed
for separate collection at
an appropriate collection
point. Do not dispose of
as household waste
• For more information,
contact the retailer or
local authorities in charge
of waste management.
Maplin Electronics Ltd
Brookfields Way, Manvers
Wath-Upon-Dearne
Rotherham, S63 5DL
www.maplin.co.uk
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