ZOTEK ZT100 User manual

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Specifications are subject to change without notice.
User Manual

LIMITED WARRANTY
AND LIMITATION OF LIABILITY
Customers enjoy one-year warranty
from the date of purchase.
This warranty does not cover fuses,
disposable batteries, damage from
misuse accident, neglect, alteration,
contamination, or abnormal conditions
of operation or handling, including
failures caused by use outside of the
product's specifications, or normal wear
and tear of mechanical components.

Table of Contents Page
Introduction..........................................................1
Safety Information................................................1
Instrument Overview............................................3
LCD Display...................................................3
Function Buttons............................................5
Rotary Switch.................................................7
Input Terminals..............................................9
Measurements Instruction..................................10
Measure AC/DC Voltage..............................10
Measure AC/DC Current..............................10
Measure Resistance.....................................11
Test for Continuity........................................12
Test Diodes..................................................12
Measure Capacitance..................................13
Measure Frequency.....................................14
Measure Duty Cycle.....................................15
Maintenance.......................................................17

Clean the Product.........................................17
Replace the Batteries...................................17
Replace the Fuses.......................................18
Specifications.....................................................19
General Specifications.................................19
Mechanical Specifications............................19
Environmental Specifications.......................20
Electrical Specifications......................................21

Introduction
This product is a battery-powered, auto-ranging
digital multimeter with a 4000 counts LCD display
and a backlight. It can be used to measure AC/DC
voltage, AC/DC current, resistance, capacitance,
frequency, duty cycle, diode, and continuity.
Safety Information
To avoid possible electrical shock, fire, or
personal injury, please read all safety information
before you use the product. Please use the
product only as specified, or the protection
supplied by the product can be compromised.
•Examine the case before you use the product.
Look for cracks or missing plastic. Carefully look
at the insulation around the terminals.
•The measurement must be made with correct
input terminals and functions and within the
allowable measuring range.
1

•Do not use the product around explosive gas,
vapor, or in damp or wet environments.
•Keep fingers behind the finger guards on the
probes.
•When the product has already been connected
to the line being measured, do NOT touch the
input terminal that is not in service.
•Disconnect the test leads from the circuit before
changing the mode.
•When the voltage to be measured exceeds 36V
DC or 25V AC, the operator shall be careful
enough to avoid electric shock.
•Misuse of mode or range can lead to hazards,
be cautious. “ ” will be shown on the display
when the input is out of range.
•Low level of a battery will result in incorrect
readings. Change the batteries when battery
level is low. Do not make measurements when
the battery door is not properly placed.
2

3
LCD Display
Instrument Overview
①
Low battery. Replace batteries.
②
Display freezes present reading.
③
Continuity test.
④
Diode test.
⑤
Duty cycle test.
⑥
Resistance test. (Ohm)
⑩
⑪
⑫
⑬
①②③④⑤⑥
⑦
⑧
⑨
⑭
⑮

4
⑦
Frequency test. (Hertz)
⑧
Capacitance test. (Farad)
⑨
Voltage test. (Volt)
⑩
Current test. (Ampere)
⑪
Auto range. The product selects
the range with the best resolution.
⑫
Alternating current.
⑬
Direct current.
⑭
Negative readings.
⑮
Relative mode.
Measurement units.

5
Function Buttons
① ②
①
Push once to hold the current reading on the
display; push again to continue normal
operation.
Push for more than 2 seconds to turn on the
backlight; long
-push again to turn off or the
backlight automatically turns off after 2
minutes.

②
Selects alternate measurement modes on a
rotary switch setting, including:
1. Resistance/Diode/Continuity/Capacitance
2. Frequency/Duty Cycle
3. DC A/AC A
4. DC mA/AC mA
Push for more than 2 seconds to enter the
relative mode. The product will store the
present reading as a reference for
subsequent readings. The display is zeroed,
and the stored reading is subtracted from all
subsequent readings. Long
-push again to
exit the relative mode.
6

Rotary Switch
Turn
off the product at this position.
•
The product automatically
powers
off after 15 minutes of inactivity.
•
The built-in beeper beeps 5
times
1 minute before auto power off.
•
To restart the product from
auto
power off, press the
SELECT
botton or turn the rotary
switch
back to the OFF position and
then
to aneeded position.
AC
voltage ≤1000V
DC
voltage ≤750V
7

8
Ohms
≤40MΩ
Diode test. Displays above 3V
Continuity. Beeper turns on at
＜50
Ω
Farads
≤200μF
Frequency with low voltage
Duty Cycle from 1%~99%
DC A ≤10A
AC A ≤10
A
DC A ≤
400mA
AC A ≤
400mA

Input Terminals
10A
Input
terminal for AC/DC
current
measurements
to 10A.
COM
Common (return) terminal for all
measurements.
VΩHz
Input
terminal for the measurements of:
1
. AC/DC voltage
2
. Resistance
3
. Capacitance
4
. Frequency
5
. Duty cycle
6
. Continuity
7
. Diode
8
. AC/DC current to 400mA
9

10
Measurements Instruction
Measure AC/DC Voltage
1. Connect the black test lead to the COM
Terminal and the red lead to the VΩHz Terminal.
2. Turn the rotary switch to or to .
3. Touch the probes to the correct test points of
the circuit to measure the voltage.
4. Read the measured voltage on the display.
Measure AC/DC Current
1. Connect the black test lead to the COM
Terminal and the red lead to the VΩHz Terminal
or the 10A Terminal (choose based onthe value of
the current to be measured).
2. Turn the rotary switch to or .
*Do not measure voltage that exceeds the extremes
as indicated in the Specifications.
*Do not touch high voltage circuit during
measurements.

11
3. Press SELECT to toggle between AC/DC.
4. Break the circuit path to be measured, connect
the test leads across the break and apply power.
5. Read the measured current on the display.
Measure Resistance
1. Connect the black test lead to the COM
Terminal and the test lead to the VΩHz Terminal.
2. Turn the rotary switch to ,and the display
will show “ ”.
3. Touch the probes to the desired test points of
the circuit to measure the resistance.
4. Read the measured resistance on the display.
*Do not measure current that exceeds the extremes
as indicated in the Specifications.
*Use the 10A Terminal and the Mode when you
are measureing an unknown current. Then switch
to the VΩHz Termianl and the Mode if necessary.
*Do not input voltage at this setting.

Test for Continuity
1. Connect the black test lead to the COM
Terminal and the red lead to the VΩHz Terminal.
2. Turn the rotary switch to , press SELECT
twice to toggle to the Continuity Mode.
3. Touch the probes to the desired test points of
the circuit.
4. The built-in beeper will beep when the
resistance is lower than 50Ω, which indicates a
short circuit.
Test Diodes
1. Connect the black test lead to the COM
Terminal and the red lead to the VΩHz Terminal.
12
*Do not input voltage at this setting.
*Disconnect circuit power and discharge all
capacitors before you test resistance.
*Do not input voltage at this setting.

2. Turn the rotary switch to , press SELECT
once to toggle to the Diode Mode.
3. Connect the red probe to the anode side and
the black probe to the cathode side of the diode
being tested.
4. Read the forward bias voltage value on the
display.
5. If the polarity of the test leads is reversed with
diode polarity or the diode is broken, the display
reading shows “ ”.
Measure Capacitance
1. Connect the black test lead to the COM
Terminal and the red lead to the VΩHz Terminal.
2. Turn the rotary switch to , press SELECT
three times to toggle to the Capacitance Mode.
13
*Do not input voltage at this setting.
*Disconnect circuit power and discharge all
capacitors before you test diode.

3. Connect the red probe to the anode side and
the black probe to the cathode side of the
capacitor being tested.
4. Read the measured capacitance value on the
display once the reading is stablized.
Measure Frequency
1. Connect the black test lead to the COM
Terminal and the red lead to the VΩHz Terminal.
2. Turn the rotary switch to (applies to high
frequency with low voltage).
3. Touch the probes to the desired test points.
4. Read the measured frequency value on the
display.
14
*Disconnect circuit power and discharge all
capacitors before you test capacitance.

Measure Duty Cycle
1. Connect the black test lead to the COM
Terminal and the red lead to the VΩHz Terminal.
2. Turn the rotary switch to (applies to high
frequency with low voltage), press SELECT once
to toggle to the Duty Cycle Mode.
3. Touch the probes to the desired test points.
4. Read the measured duty cycle value on the
display.
15

Maintenance
Beyond replacing batteries and fuses, do not
attempt to repair or service the product unless you
are qualified to do so and have the relevant
calibration, performance test, and service
instructions.
Clean the Product
Wipe the product with a damp cloth and mild
detergent. Do not use abrasives or solvents.Dirt
or moisture in the terminals can affect readings.
*Remove the input signals before you clean the
product.
Replace the Batteries
When “ ” is shown on the display, batteries shall
be replaced as below:
1. Remove the test leads and turn off the product
before replacing the batteries.
16