ZOTEK ZT111 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
Measure Temperature...................................15
Test NCV………………………………………16

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

Introduction
This product is the world's first 9999 counts palm-
size auto-ranging digital multimeter. The product
is battery-powered with true-rms, a LCD display
and a backlight.
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.
•Do not use the product around explosive gas,
vapor, or in damp or wet environments.
1

•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
①
Continuity test.
②
Temperature test
.
(Fahrenheit or Celsius)
③
Diode test.
④
Duty cycle test.
⑤
Display freezes present reading.
⑥
Resistance test.
(Ohm)
Instrument Overview
⑩
⑪⑫
⑬
①②③④⑤⑥⑦⑧
⑨
⑭
⑮
⑯
⑰
⑱

4
⑦
Frequency test. (Hertz)
⑧
Capacitance test. (Farad)
⑨
Voltage test. (Volt)
⑩
Current test. (Ampere)
⑪
Manual range. The user selects
the range.
⑫
Auto range. The product selects
the range with the best resolution.
⑬
The
product measures
both
sinusoidal
and nonsinusoidal
ac
waveforms
accurately.
⑭
Low battery. Replace batteries.
⑮
Alternating current.
⑯
Direct current.
⑰
Negative readings.
⑱
Unsafe Voltage.
Measurement units.

5
Function Buttons
① ②
①
Range/Backlight
Button
•
Push this button once to enter the
manual
range mode. In manual range
mode,
each push increases the range; when
the
highest range is reached, the next
push
will lead to the lowest range. To exit
the
manual range mode, turn the
rotary
switch.
•
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
SEL/HOLD Button
•
Push to select alternate measurement
modes on a rotary switch setting,
including:
1. DC V/AC V/Frequency/Duty Cycle
2. DC mV/AC mV/Temperature
3. Resistance/ Continuity/ Diode/
Capacitance
4. Frequency/Duty Cycle
5. DC A/AC A
6. DC μA/AC μA
7. NCV
•
Push for more than 2 seconds to hold
the
current reading on the display; long-
push
again to continue normal operation.
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
SEL/HOLD
button or turn the rotary
switch
back to the OFF position and
then
to aneeded position.
•
To disable the Auto Power
Off
function, hold down
the
SEL/HOLD button when
turning
on the product, you will hear
five
beeps if you have
successfully
disabled the function.
7

8
DC voltage
≤999.9V
AC voltage
≤750V
Frequency with high voltage
Duty Cycle from 1%~99%
DC voltage ≤99.99mV
AC voltage ≤99.99mV
Celsius:
-20~1000
Fahrenheit:
-4~1832
Ohms
≤99.99MΩ
Continuity. Beeper turns on at
＜50
Ω
Diode test. Displays above 3V
Farads
≤9.999mF
Frequency with low voltage
Duty Cycle from 1%~99%
DC A ≤9.999A
AC A ≤9.999
A
DC A ≤999.9
μA
AC A ≤999.9
μA
Non
-contact voltage test.

Input Terminals
A mA
Input
terminal for AC/DC
current
measurements
to 9.999A.
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
. Temperature
6
. Continuity
7
. Diode
8
. Duty cycle
9
. AC/DC current to 999.9μA
9

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. Press SEL to toggle between AC/DC.
4. Touch the probes to the correct test points of
the circuit to measure the voltage.
5. 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 AmA Terminal (choose based
on the value of the current to be measured).
10
*Do not measure voltage that exceeds the extremes
as indicated in the Specifications.
*Do not touch high voltage circuit during
measurements.

2. Turn the rotary switch to or .
3. Press SEL 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.
11
*Do not measure current that exceeds the extremes
as indicated in the Specifications.
*Use the A mA Terminal and the Mode when
you are measuring an unknown current. Then
switch to the VΩHz Terminal and the Mode if
necessary.
*Do not input voltage at this setting.

12
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 SEL once
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.
*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 SEL twice
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 SEL 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 low
frequency with high voltage), press SEL twice
to toggle to the Frequency Mode;or 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 low
frequency with high voltage), press SEL three
times to toggle to the Duty Cycle Mode;or turn
the rotary switch to (applies to high
frequency with low voltage), press SEL 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.
Measure Temperature
1. Connect the black thermocouple probe to the
COM Terminal and the red probe to the VΩHz
Terminal.
15

2. Turn the rotary switch to , press SEL three
times to measure temperature(℃), or press
SEL four times to measure temperature(℉).
3. Touch the probes to the desired test points.
4. Read the measured temperature on the
display.
Test NCV
1. Turn the rotary switch to .
2. Hold the product and move it around, the built-
in beeper will beep when the inner sensor
detects AC voltage nearby. The stronger the
voltage is, the quicker the beeper beeps.
16
*Do not input voltage at this setting.