XFtp XPro User manual

XPro
Digital Multimeter
Operation Manual

XPro - Operation Manual
1
Table of Contents
Overview ........................................................................ 3
Unpacking Inspection .................................................. 4
Safety Information ........................................................ 5
Rules for Safe Operation ............................................. 6
International Electrical Symbols ................................ 8
The Meter Structure ...................................................... 9
Rotary Switch .............................................................. 10
Functional Buttons .................................................... 11
Display Symbols ......................................................... 12
Measurement Operation ............................................. 14
DC and AC Voltage Measurement ........................... 14
DC and AC Current Measurement ........................... 16
Resistance Measurement ......................................... 18
Diode Measurement ................................................. 20
Continuity Testing ..................................................... 22
Capacitance Measurement ....................................... 24
Temperature Measurement ....................................... 26
Transistor Measurement ........................................... 27
Frequency Measurement ......................................... 28
Sleep Mode ............................................................... 29
Operation of Hold Mode ........................................... 29
General Specifications ............................................... 30
Accuracy Specifications ............................................. 32
DC Voltage ............................................................... 32
AC Voltage ............................................................... 32
DC Current ............................................................... 33
AC Current ............................................................... 33
Resistance ............................................................... 34
Diodes Test ............................................................... 34
Continuity Test ......................................................... 34
Capacitance ............................................................. 35
Temperature .............................................................. 35
Transistor Test .......................................................... 36
Frequency ................................................................ 36

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Maintenance ................................................................ 37
General Service ........................................................ 37
Replacing the Fuse .................................................. 38
Replacing the Battery .............................................. 39
Warranty Information ................................................. 40

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The XFTP XPro Digital Multimeter (hereafter referred to
as “the Meter”) is a hand-held measuring instrument that
includes a large LCD.
The Meter can measure AC/DC Voltage, AC/DC Current,
Resistance, Capacitance, Temperature, Frequency,
Transistor, Diode and Continuity. It also includes Data
Hold, Full Icon Display, Overload Protection and Sleep
Mode features.
Overview
!
WARNING: To avoid electric shock or personal
injury, read the Safety Information and Rules
for Safe Operation sections carefully before
using the Meter.

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Unpacking Inspection
Open the package and remove the Meter. Check the
following items carefully to see if there are any missing
or damaged parts:
• Operation Manual
• Test Leads
• Multipurpose Socket
• Temperature Probe
• 9 Volt Battery
In the event that you find any missing or damaged
parts, please contact Trilithic for a replacement.

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Safety Information
This Meter complies with the standards IEC61010: in
pollution degree 2, overvoltage category (CAT. II 1000V,
CAT. III 600V) and double insulation.
CAT. II: Local level, appliance, PORTABLE EQUIPMENT
etc., with smaller transient voltage overvoltages than
CAT. III
CAT. III: Distribution level, fixed installation, with smaller
transient overvoltages than CAT. IV
Use the Meter only as specified in this operating manual,
otherwise the protection provided by the Meter may be
impaired.
In this manual, a Warning identifies conditions and
actions that pose hazards to the user, or may damage
the Meter or the equipment under test.
A Note identifies the information that user should pay
close attention to.
International electrical symbols used on the Meter and in
this Operation Manual are explained on Page 8.

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Rules for Safe Operation
• Inspect the case before using the Meter. Do not
use the Meter if it is damaged or the case (or part
of the case) is removed. Look for cracks or
missing plastic and pay attention to the insulation
around the connectors.
• Inspect the test leads for damaged insulation or
exposed metal. Check the test leads for
continuity. Replace damaged test leads with
identical model number or electrical specifications
before using the Meter.
• Do not apply more than the rated voltage, as
marked on the Meter, between the terminals or
between any terminal and grounding.
• The Meter is suitable for indoor use.
• The rotary switch should be placed in the right
position and no change of range should be made
during a measurement to prevent damage to the
Meter.
• When the Meter is working at an effective voltage
over 60V in DC or 30V rms in AC, special care
should be taken for danger of electric shock.
• Use the proper terminals, function, and range for
your measurements.
!
WARNING: To avoid possible electric shock or
personal injury, and to avoid possible damage to
the Meter or the equipment under test, adhere to
the following rules:

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• If the value to be measured is unknown, use the
maximum measurement position and reduce the
range step by step until a satisfactory reading is
obtained.
• Do not use or store the Meter in an environment of
high temperature, humidity, explosive, flammable
or strong magnetic field.
• The performance of the Meter may deteriorate with
exposure to high humidity.
• When using the test leads, keep your fingers
behind the finger guards.
• Disconnect circuit power and discharge all high-
voltage capacitors before testing resistance,
continuity, diodes, capacitance or current.
• Before measuring current, check the Meter’s fuses
and turn off power to the circuit before connecting
the Meter to the circuit.
• Replace the battery as soon as the battery
indicator appears. With a low battery, the Meter
might produce false readings that can lead to
electric shock and personal injury.
• Remove test leads, test clips and temperature
probe from the Meter and turn the Meter power off
before opening the Meter case.
• The internal circuit of the Meter should not be
altered to avoid damage to the Meter, accidents,
and voiding of the warranty.
• Soft cloth and mild detergent should be used to
clean the surface of the Meter when servicing. No
abrasives and solvents should be used.

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International Electrical Symbols
The following table describes the International Electrical
Symbols that are used on the device and manual.
• Turn the Meter power off when it is not in use and
take out the battery when not using for an
extended period.
• Constantly check the battery as it may leak when
it has been in extended use. Replace the battery
as soon as leaking is detected. A leaking battery
will damage the Meter.
Position Function
AC (Alternating Current)
DC (Direct Current)
Grounding
Double Insulated
Deficiency of Built-In Battery
Warning: Refer to Operation
Manual
Conforms to standards of the
European Union

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The Meter Structure
The following figure shows the structure of the Meter.
1. LCD Display
2. HOLD Button
3. Rotary Switch
4. Input Terminals
5. POWER Button

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Rotary Switch
The following table describes the functions available
from the positions of the rotary switch.
Position Function
°C Temperature Measurement
hFE Transistor Measurement
AC Voltage Measurement
DC Voltage Measurement
AC Current Measurement
DC Current Measurement
Hz Frequency Measurement
Continuity & Diode Measurement
ΩResistance Measurement
Capacitance Measurement

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Functional Buttons
The following table describes the operation of the
functional buttons.
Button Operation Performed
Power
(Yellow Button) Turn the Meter on and off.
Hold
(Blue Button)
Enter and exit the hold mode.
In hold mode, His displayed
and the present value is
shown.

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Display Symbols
Connect Test Leads
COM
:
FmVV k M
::
P
nF FkHz AmAA
P
A
:
V
PAmA
No. Symbol Description
1 hFE The unit of transistor test.
2
The battery is low.
WARNING: To avoid false
readings, replace the
battery as soon as the low
battery indicator appears.
3 AC
Indicator for AC voltage or
current. The displayed value
is the mean value.
4 Indicates a negative
reading.
5 Diode testing symbol.
6 The continuity buzzer is on.
7 Data hold is active.

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No. Symbol Description
8
Connect
Terminal
Indicator to connect test
leads into different input
terminals.
Ω, kΩ, MΩ
Ω: Ohm, the unit of
resistance
kΩ: Kil-Ohm, 1x103or
1000 Ohms
MΩ: Meg-Ohm, 1x106or
1,000,000 Ohms
mV, V
V: Volts, the unit of
voltage
mV: Millivolt, 1x10-3 or
0.001 Volts
µF, nF
F: Farad, the unit of
capacitance
µF: Microfarad, 1x10-6 or
0.000001 Farads
nF: Nanofarads, 1x10-9 or
0.000000001 Farads
µA, mA, A
A: Amperes (amps), the
unit of current
mA: Milliamp, 1x10-3 or
0.001 Amperes
µA: Microamp, 1x10-6 or
0.000001 Amperes
°C Centigrade Temperature
9
kHz
Hz: Hertz, the unit of
frequency in cycles
per second
kHz: Kilohertz, 1x103or
1,000 Hertz

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Measurement Operation
DC and AC Voltage Measurement
black red
The DC Voltage ranges are: 200mV, 2V, 20V, 200V and
1000V.
The AC Voltage ranges are: 2V, 20V, 200V and 750V.
To measure DC or AC Voltage, perform the following
steps:
1. Insert the red test lead into the HzVΩΩ
ΩΩ
Ωterminal
and the black test lead into the COM input terminal.
!
WARNING: To avoid harm to you or damage to
the Meter from electric shock, please do not
attempt to measure voltages higher than 1000V
although readings may be obtained.

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2. Set the rotary switch to an appropriate measure-
ment position in the Vor
V
range.
3. Connect the test leads across the object to be
measured. The measured value is shown on the
display.
When performing a DC or AC voltage measurement
please note the following;
• If the value of the voltage to be measured is
unknown, use the maximum measurement position
(1000 V) and reduce the range step by step until a
satisfactory reading is obtained.
• The LCD displays “1” indicating the existing
selected range is overloaded, you must select a
higher range in order to obtain a correct reading.
• In each range, the Meter has an input impedance
of approximately 10 MΩ. This loading effect can
cause measurement errors in high impedance
circuits. If the circuit impedance is less than or
equal to 10 kΩthen error is negligible (0.1% or
less).
• When a DC voltage measurement has been
completed, disconnect the connection between the
testing leads and the circuit under test.

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black red
DC and AC Current Measurement
Use proper terminals, function, and range for the
measurement. When the testing leads are connected to
the current terminals, do not parallel them across any
circuit.
The DC Current ranges are: 2mA, 200mA, 20A
The AC Current ranges are: 2mA, 200mA and 20A
To measure DC or AC current, perform the following
steps:
1. Turn off power to the circuit. Discharge all high-
voltage capacitors.
!
WARNING: Never attempt an in-circuit current
measurement where the open circuit voltage
between terminals and ground is greater than
250V. If the fuse fails during measurement, the
Meter may be damaged or the operator may be
injured.

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2. Insert the red test lead into the Aor mA terminal
and the black test lead into the COM terminal.
3. Set the rotary switch to an appropriate measure-
ment position in
A
or
A
range.
4. Break the current path to be tested. Connect the
red test lead to the more positive side of the break
and the black test lead to the more negative side
of the break.
5. Turn on power to the circuit. The measured value is
shown on the display.
When performing a DC or AC current measurement
please note the following;
• If the value of current to be measured is unknown,
use the maximum measurement position, and
reduce the range step by step until a satisfactory
reading is obtained.
• For safe operation, the measuring time for high
current (> 10A) should be less than 10 seconds and
the interval time between two measurements
should be greater than 15 minutes.
• When the current measurement has been
completed, disconnect the connection between the
testing leads and the circuit under test.

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black red
Resistance Measurement
The resistance ranges are: 200Ω, 2kΩ, 20kΩ, 2MΩand
20MΩ.
To measure resistance, perform the following steps:
1. Insert the red test lead into the HzVΩΩ
ΩΩ
Ωterminal
and the black test lead into the COM terminal.
2. Set the rotary switch to an appropriate measure-
ment position in the ΩΩ
ΩΩ
Ωrange.
3. Connect the test leads across with the object being
measured. The measured value is shown on the
display.
!
WARNING: To avoid damage to the Meter or to
the devices under test, disconnect circuit
power and discharge all the high-voltage
capacitors before measuring resistance.