User Manual for Tektronix models including: UT33C Digital Multimeter, Digital Multimeter, Multimeter
⑨ Resistance test. (Ohm) ⑩ Frequency test. (Hertz) ⑪ Secondary measurements display ⑫ Auto range. The product selects the range with the best resolution.
مولتی متر زویی ZOYI مدل ZT-225 | فروشگاه تکترونیکس
File Info : application/pdf, 30 Pages, 348.80KB
DocumentDocumentUser Manual
All rights reserved. Specification are subject to change without notice.
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..............................................10 Measurements Instruction..................................11 Measure AC/DC Voltage..............................11 Measure AC/DC Current..............................11 Measure Resistance.....................................12 Test for Continuity........................................13 Test Diodes..................................................13 Measure Capacitance..................................14 Measure Frequency.....................................15 Measure Duty Cycle.....................................15 Measure Temperature .................................16
NCV........................................................... 16 AC+DC Voltage......................................... 17
Maintenance.......................................................18 Clean the Product.........................................18 Replace the Batteries...................................18 Replace the Fuses.......................................19
Specifications.....................................................19 General Specifications.................................19 Mechanical Specifications............................20 Environmental Specifications.......................20
Electrical Specifications......................................21
Introduction
This product is a battery-powered, true-rms, autoranging digital multimeter with a 25000 counts 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.
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
Instrument Overview
LCD Display
REL
Display freezes present reading.
Diode test.
Continuity test.
Relative value test.
Display shows maximum reading.
Display shows minimum reading.
Temperature test. (Fahrenheit/Celsius)
Duty cycle test. 3
Resistance test. (Ohm)
Frequency test. (Hertz)
Secondary measurements display
Auto range. The product selects
the range with the best resolution.
AC + DC
The product can accurately measure alternating current with
and without sinusoidal
waveforms
Low battery. Replace batteries.
Alternating current.
Direct current.
Analog bar graph
Auto power off
Main display
Don't input voltage reminder.
Measurement units.
4
Function Buttons
Selects alternate measurement modes on a rotary switch setting, including: 1. Frequency/Duty Cycle 2. DC mA / AC mA 3. DC A / AC A 4. DC A / AC A 5. Diode / Continuity 6. DC mV / AC mV 7. AC+DC Voltage / DC Voltage 8. Press and hold for 2 seconds to enter REL
model, press again to exit this mode.
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.
5
Push to toggle between the MAX and the MIN mode. To exit MAX/MIN mode, push the button for more than 2 seconds. Press to enter the manual range mode, you can choose the appropriate range according to the measured signal size; If you want to exit, hold down the button for more than 2 seconds. The screen will display "AUTO".
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 button or turn the rotary switch back to the OFF position and then to a needed position. · To disable the Auto Power Off function, hold down the SELECT button when turning on the product, you will hear four beeps if you have successfully disabled the function.
7
AC voltage750V AC DC current1000V DC AC+DC voltage A/DC voltage250mV AC DC Resistance250M Continuity, Diode Non-contact voltage Capacitance99.99mF Frequency10MHz Celsius:-20~1000, Fahrenheit:-4~1832
8
AC/DC current20A AC/DC current mA250mA AC/DC current uA2500uA
9
Input Terminals
Input terminal for AC/DC current measurements to 20A. Input port for current mA/uA measurement mA250mA,uA2500uA
Common (return) terminal for all measurements. 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
10
Measurements Instruction
Measure AC/DC Voltage
1. Connect the black test lead to the COM
Terminal and the red lead to the
Terminal.
2. According to the voltage signal to be measured,
rotate the dial to select the corresponding voltage
gear; Press RANGE button to enter manual range
mode, and press SEL button to switch AC/DC in
mV mode.
3. Touch the probes to the correct test points of the circuit to measure the voltage.
4. Read the measured voltage on the display.
*Do not measure voltage that exceeds the extremes as indicated in the Specifications. *Do not touch high voltage circuit during measurements.
Measure AC/DC Current
1. Connect the black test lead to the COM
Terminal and the red lead to the corresponding terminal. 20A or mAuA).
2. Point the arrow on the knob to the AC/DC A,mA or uA range, depending on the signal size.
11
3.Break the circuit path to be measured, connect
the test leads across the break and apply power. 4. Read the measured current on the display.
*Do not measure current that exceeds the extremes as indicated in the Specifications. *Use the 20A Terminal when you are measuring an unknown current. Then select the test port and gear according to the displayed value. *Do not input voltage at this setting.
Measure Resistance
1. Connect the black test lead to the COM Terminal
and the test lead to the
Terminal.
2. Rotate the dial to the mode.
3. Touch the probes to the desired test points of the circuit to measure the resistance.
4. Read the measured resistance on the display.
*Disconnect circuit power and discharge all capacitors before you test resistance.
*Do not input voltage at this setting.
12
Measure continuity
1. Connect the black test lead to the COM Terminal and
the red lead to the
Terminal.
2. Turn the rotary switch to Diode/Continuity mode , then press the SEL button.
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 50, which indicates a short circuit.
*Do not input voltage at this setting.
Test Diodes
1. Connect the black test lead to the COM Terminal and
the red lead to the
Terminal.
2. Turn the rotary switch to 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.
13
5. If the polarity of the test leads is reversed with
diode polarity or the diode is broken, the display
reading shows " ".
*Do not input voltage at this setting. *Disconnect circuit power and discharge all
capacitors before you test diode.
Measure Capacitance 1. Connect the black test lead to the COM Terminal and
the red lead to the
Terminal.
2. Turn the rotary switch to
.
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.
*Disconnect circuit power and discharge all capacitors before you test capacitance.
14
Measure Frequency
1. Connect the black test lead to the COM Terminal and
the red lead to the
Terminal.
2. Turn the rotary switch to
(applies to high
frequency with low voltage); or turn the rotary switch
to , press SELECT once to toggle to
the Frequency Mode (applies to low frequency with
high voltage).
3. Touch the probes to the desired test points.
4. Read the measured frequency value on the display.
Measure Duty Cycle
1. Connect the black test lead to the COM Terminal
and the red lead to the
Terminal.
2. Turn the rotary switch to
, press the Hz %
button 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
Measure Temperature
1. Connect the black thermocouple probe to the COM
Terminal and the red probe to the
Terminal.
2. Turn the rotary switch to / mode, and the display will
show the room temperature .The main display display will
show the value of , and the vice display will show the
value of .
3. Touch the probes to the desired test points.
4. Read the measured temperature on the display.
*Do not input voltage at this setting.
Test NCV
1. Turn the rotary switch to NCV mode, and the display will shows "EF".
2. Hold the product and move it around, the builtin beeper will beep when the inner sensor
detects AC voltage nearby. The stronger the
voltage is, the quicker the beeper beeps.
3. If the red test lead is inserted into the "
"
alone, and the probe of the test lead is used to
contact the mains power plug, if the buzzer alarm is
strong, it is the live wire, otherwise the earth wire or
the neutral wire. 16
AC+DC Voltage Measurement
1. Rotate the dial to the modethen connect the
black test lead to the COM Terminal and the red
lead to the
Terminal.
2. Touch the probes to the correct test points of the circuit.
3. Read the measured voltage on the display. The main display display will show the value of DC voltage, and the vice display will show the value of AC voltage.
4. Press the SEL to read the value of AC+DC Voltage.
*Do not measure voltage that exceeds the extremes as indicated in the Specifications. *Do not touch high voltage circuit during measurements.
17
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. 2. Loosen the screw on the battery door and remove the
battery door.
3. Replace the used batteries with new batteries of the same type.
4. Place the battery door back and fasten the screw. 18
Replace the Fuses When a fuse is blown or do not work properly, it shall be replaced as below: 1. Remove the test leads and turn off the product
before replacing the fuse.
2. Loosen the four screws on the back cover and the screw on the battery door, then remove the battery door and the back cover.
3. Replace the fuse with a new fuse of the same type. 4. Place the back cover and the battery door back
and fasten the screws.
Specifications
Environmental Specifications
Operating
Temperature Humidity
0~40 75%
Storage
Temperature Humidity
-20~60 80%
19
General Specifications
Display (LCD) Ranging Material Update Rate Ture RMS Data Hold Backlight Low Battery Indication Auto Power Off
25000 counts Auto/Manual ABS/PVC 3 times/second
Mechanical Specifications
Dimension Weight Battery Type Warranty
180*90*50mm 384gno battery
1.5V AA Battery * 3 One year
20
Electrical Specifications
Function
Range
DC Voltage 25.000mV (mV) 250.00mV
2.5000V
DC Voltage 25.000V
(V)
250.00V
1000.0V
AC Voltage 25.000mV (mV) 250.00mV
2.5000V
AC Voltage 25.000V
(V)
250.00V
750.0V
Resolution 0.001mV 0.01mV 0.0001V 0.001V 0.01V 0.1V 0.001mV 0.01mV 0.0001V 0.001V 0.01V 0.1V
Accuracy ±(0.05%+3) ±(0.05%+3)
±(0.3%+3)
21
Function
AC+DC voltage
(DC)
AC+DC voltage
(AC)
AC+DC voltage (AC+DC)
Range 2.5000V 25.000V 250.00V 1000.0V 2.500V 25.00V 250.0V 750V 2.5000V 25.000V 250.00V 1000.0V
Resolution Accuracy
0.0001V
0.001V 0.01V
±(0.5%+3)
0.1V
0.001V
0.01V 0.1V
±(1.0%+3)
1V
0.0001V
0.001V 0.01V
±(1.5%+3)
0.1V
22
Function
Range
DC Current 2.5000A
(A)
20.000A
DC Current 25.000mA (mA) 250.00mA
DC Current 250.00uA (A) 2500.0uA
AC Current 2.5000A
(A)
20.000A
AC Current 25.000mA (mA) 250.00mA
AC Current 250.00uA
(A) 2500.0uA
250.00
2.5000k
25.000k
250.00k Resistance
2.5000M
25.00M
250.0M
Resolution 0.0001A 0.001A 0.001mA 0.01mA 0.01uA 0.1uA 0.0001A 0.001A 0.001mA 0.01mA 0.01uA 0.1uA 0.01 0.0001k 0.001k 0.01k 0.0001M 0.01M 0.1M
23
Accuracy ±(0.5%+3)
±(0.5%+3)
±(0.8%+3)
±(0.8%+3) ±(0.5%+3) ±(0.2%+3) ±(1.0%+3) ±(5%+5)
Function Range Resolution Accuracy
9.999nF 0.001nF ±(5.0%+20)
99.99nF 0.01nF
999.9nF 0.1nF
9.999F Capacitance 99.99F
0.001F 0.01F
±(2.0%+5)
999.9F 0.1F
9.999mF 0.001mF ±(5.0%+5)
250.00Hz 0.01Hz
2.5000KHz 0.0001KHz
Frequency 25.000KHz 0.001KHz ±(0.1%+2) 250.00KHz 0.01KHz
2.5000MHz 0.0001MHz
10.000MHz 0.001MHz
Duty Cycle 1%~99% 0.1%
±(0.1%+2)
24
Function
Range Resolution Accuracy
(-20~1000) 1 Temperature
(-4~1832) 1
±(3%+5
Diode
Continuity
NCV
AC+DC voltage measurement
AC+DC 1V~1000V
25
3-Heights(TM) PDF Optimization Shell 5.9.1.5 (http://www -tools.com)