Crenova MS8233D Digital Multimeter Instruction Manual

MS8233D
Digital Multimeter

MS8233D Digital Multimeter

Instruction Manual

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INTRODUCTION

Crenova MS8233D is a reliable mult-function digital multimeter for safe, easy and fast electrical measurements. This high-performance handheld multimeter is equipped with a 6000-count LCD display o give clear and accurate readings. It is designed to measure DC/AC voltage, DC/AC current, resistance, capacitance, frequency, duty cycle, test diode and continuity, and trace live wires. MS8233D. aiso comes with advanced features, such s auto power off, NCV (Non- Contact Voltage) detector, back light, data hold, and more practical measuring modes and functions. It is an Ideal tool for laboratory, school, factory, and home use.

SAFETY NOTES

The Mater conforms to [ECEI010-1 CAT Il 600V safety standard. To prevent electric shock, fire, personal injury or property damage, please read all safety information and all instructions carefully before you use the Meter

1. D0 not use the Meter with damaged housing, rubber holster, terminals, probes, test leads, and accessories or after the Meter malfunctions or is dropped or damaged in any manner, please contact our customer service for a replacement.
2. Before measuring voltage higher than 36V DC or 25V rams AC, check the connection and insulation of test leads to avoid electric shock.
3.  Limit operation to the specified measurement category, voltage, or amperage ratings. Do not apply more than the rated voltage, between the terminals or between each terminal and earth ground.
4. Use the correct terminals, function, and range for measurements. Do not change the range when testing the circuit.
5. Always use probes, test leads, and accessories, that have the same measurement category, voltage, and amperage ratings as the Metra.
6. Remove test leads from the Meter before changing function mode or range. Do not touch the metal probe when testing the circuit.
7. To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance.
8. Tur off the power and remove test leads from the Meter before replacing the batteries or fuse. Install the batteries and lock the battery door before operating the Meter.
9. Always adheres to local and national safety codes. Use personal protective equipment (such as rubber in suiting gloves, goggles, lame-resistant protective clothing etc.) to prevent shock and are blast injury where hazardous live conductors are exposed.
10. Do not use the Meter around explosive gas, vapor, o in damp or wet environments.
11. D0 not expose the Meter to magnetic fields, extreme heat, or expose to direct sunlight for long periods of time.

Safety and Electrical Symbols

| DANGERI HIGH VOLTAGE!
Risk Electric Shock.
---|---
| Earth
| Low Battery
**| DC (Direct Current)
| Fuse
| WARNING!
Refer to Instruction Manual,
| Double Insulation
| DC and AC (Direct and Alternating Current)
**| AC  (Alternating Current )
****| conform o European Union Directives

PRODUCT OVERVIEW

(1) Technical Specifications
Model: 532350
LCD Digital Display: 6000 counts (3 5/6), auto polarity indication
Sampling Rate: opprox. 3 times per second
Measuring Technology: A/D converter
Over Range Indication: “OL” appaars on the screen
Low Battery Indication: &l appears on the screen
Operating Environment: 0°C to 40°C, relative humidity < 75%
Storage Environment: -20°C to 60°C, relative humidity < 85%
Power Supply: 2 x 15V AAA batteries
Fuse Type: fuse FST for mARA input terminal: 95 20jmm, 600MA, 250V
fuse FS2 for 10A input terminal: (¢S 20)mm, 108, 250V
Size: 167mm x 74mm x 42mm
Weight: approx. 210g (batteries are included)
Box Contonts:

(2) Product Description

1. 6000-Count LCD display
2. Function selection button (FUNC”)
3. “RANGE” button
4. “MAX/MIN® button
5. Dote hold/Backlight button (HOLD/ )
6. Function selection switch
7. 410A” input terminal
8. “COM: jack
9. “V/Q/Hz/Live/mA/uA/ input terminal
10. NCV sensing area

(3) Display

| Auto Poner Off
---|---
| DC Measurement
| AC Measurement
| Auto Range
| Diode/Continuity Test
| Data Hold
| NGV Non-Contact AG Voltage Measurement)
| Minimum Value
| Maximum Value
| Low Buttery
| Duty Cybele, High Voltage
| Resistance/Frequency Units
| Capacitance/Voltage/Cunene Uris

(4) Function Buttons
1. Function selection button (“FUNC”)
Rotate the function selection switch to desired setting, short press this button to select:
~Resistance, diode or continuity mode,
~Frequency or duty cycle mode,
-DC or AC current mode,
NGV or Live detector mode, according to your needs.
When measuring AC voltage or AC current, you can also short press this button to quick measure the frequency.
After the Meter is auto powered off, short press this button to wake it up.
To tum off the APO (auto power off)function, long press this button and rotate the switch to turn on the Meter.

2. “RANGE” button
After rotating the switch to desired setting (the Meter is powered on), short press once to enter manual range mode. You can short press this button few times to change the range until it meets your demands. Long press to exit manual range mode (the Meter is back to auto range mode)
3.”MAX/MIN” button
After the Meter s powered on, short press this button to show maximum value. Press it again to show minimum value, Long press to exit.
Note: The Meter will stay in the same measurement function/mode/range when the screen displayed maximum o minimum value.
*4. Data hold/Backlight button (HOLD/ )**
Short press o tur on/of data hold (display hold) made, “ ” will opera on the screen when the mods is turned on. Long press to power on/off backlight, the back light will automatically tum off after 15 seconds.

WARNING
To prevent possible electric shock, fire, or personal injury, do not use data hold mode to determine if a circuit is live or measure unknown voltage In a circuit, When data hold mode is turned on, the LCD screen will keep original data even you measure different voltage.

OPERATING INSTRUCTIONS

Always check the battery status before using the Meter, select the correct measurement function/range/mode. I the Meter is out of power, will appear on the display. Please kindly note the sign ” beside the terminals, it warns that test voltage and current cannot exceed the specified value in this manual or on the product.

1.DC/AC Voltage Measurement
11 According to your actual requirements, rotate the function selection switch to DC voltage or AC voltage setting
12 Insert the black test lead into “COM’ jack and red test lead into jack.
13 Connect the Meter in parallels with the circuit using test loads.
14 Read measurement results on the display.

Note:
~Do not measure the voltage over 600V, it will cause personal injury and Meter damage.
“If “OL” shows on the screen, it means ‘over range”.
“When finished, remove the test leads from the tested circuit and the Meter
“When measuring & high voltage (above DC/AC 30V), high voltage symbol shows on the screen, use personal protective equipment to prevent shock and arc blast injury whirs hazardous live conductors are exposed.

2.DC/AC Current Measurement
31 Trots the function selection swath to A, mA, o A (current setting
22 Shot pres the NG button t0 choose 51 AC current mode,
23 Insert the lack stood it “COM” k. the red tst 10A” ock (mo. 108 or* , feck (mar. 600mA)
24 Connect the Miter n-sates 1 the et using the steads.
25 Road measurement ousts on the deploy

Note:
-Do not use the current jack to measure a voltage.
-Before measuring the current, you should turn off the circuit power, and check if the input terminal and range/mode function are correct. To measure an unknown current, switch to A (current) setting and use “10A” jack first, then change the setting and jack if needed.
-Overload input or wrong operation will blow the fuse. To protect the Meter and user, measuring time shall not exceed 10 seconds, and please allow the Meter to recover for more than 15 minutes before the next measurement.

3. Resistance Measurement
3.1 Rotate the function selection switch to “Ω” (resistance) setting, connect the test leads across the tested resistance.
3.2 Insert the black test lead into “COM” jack, and the red test lead in to jack.
3.3 Read measurement results on the display.

Note:
-To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all high-voltage capacitors before testing resistance.
-When the test leads are not connected across a resistor, or when a failed resistor is under test, the display will indicate “OL”.
-For low resistance measurement, the resistance of test leads is from 0.10 to 0.39, it may bring errors. Please subtract test lead resistance from the actual resistance to get an accurate reading.
-When tested resistance is more than 1MQ, the Meter will take few seconds to obtain the accurate reading. It is normal for high resistance measurement.
-Do not input voltage when measuring the resistance.

4. Capacitance Measurement
4.1 Rotate the function selection switch to “ ” (capacitance) setting, connect the test leads to the tested capacitor. Make sure the polarity of the red test lead is “+”.
4.2 Connect the black test lead to “COM” jack and the red test lead to jack.
4.3 Read measurement results on the display.

Note:
-If “OL” shows on the screen, it means “over range”.
-When measuring the capacitance less than 20nF, the Meter may display a residual reading. It caused by the distributed capacitance of test leads.
The residual reading should be subtracted from the measurement result to get an accurate value.
-Capacitor leakage or breakdown will lead to unstable readings on the screen. When measuring large capacitance, the Meter will also take few seconds to stabilize. It is normal for large capacitance measurement.
-To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all high-voltage capacitors before testing capacitance.

5. Diode and Continuity Test
5.1 Rotate the function selection switch to resistance/diode/continuity setting, short press the “FUNC” button to select diode or continuity mode. ( Resistance is the default mode in this setting.)
5.2 Insert the black test lead into “COM” jack and the red one into “ ” jack.
5.3 Connect the test leads to the tested diode, make sure the polarity of the red test lead is “+”, the black test lead is “-“. When the reading is a close approximation of positive voltage drop of the diode, it indicates forward bias. “OL” on the screen indicates reverse bias.
5.4 For continuity test, connect the test leads to the circuit to be tested. If the resistance is less than around §0 + 20Q, the buzzer beeps.

Note:
-To avoid electric shock, injury, or damage to the Meter, disconnect circuit power  and discharge all high-voltage capacitors before diode and continuity test.
-In diode setting, the Meter can measure the voltage drop of a diode and its PN junction. For a properly constructed silicon semiconductor, the reading of forward voltage drop should be between 0.5V and 0.8V, the reverse voltage drop shows “OL” on the screen (refers to open circuit). It means the polarity of the black test lead is “+” the red test lead is “-“.

6. Frequency and Duty Cycle Measurement
6.1 Rotate the function selection switch to frequency/duty cycle setting, and connect the test leads or shield cable across the signal source or circuit load to be tested.
6.2 Connect the black test lead to “COM” jack and the red lead to jack.
6.3 Short press the “FUNC” button to select frequency or duty cycle mode.
6.4 Read measurement results on the display.

Note,
-For frequency measurement, the measuring range of input voltage is listed below:
1OHz – 100kHz: 1V rms < input voltage = 20V rms,
1OOkHz – 10MHz: 3V rms ¢ input voltage s 20V rms.
-For duty cycle measurement:
10% – 90%, suitable for 10Hz – 1kHz square wave,
30% – 70%, suitable for 1kHz – 10kHz square wave,
3V pp § input voltage s 20V pp.
When measuring the frequency, do not input voltage that is greater than 20V rms
to avoid injury.
-When finished, remove the test leads from the tested circuit and the Meter.
7. Non-Contact Voltage (NCV) Detector
71 Rotate the function selection switch to NCV/Live setting.
7.2 The voltage range can be detected is from 48V to 220V, place the top of the Meter (NCV sensing area) close to the AC power line to be tested. When AC voltage is detected, the buzzer beeps. The stronger the AC voltage is detected, the faster the buzzer beeps.

8. Live Wire Detector
8.1 Rotate the function selection switch to NCV/Live setting.
8.2 Short press the “FUNC” button to select Live detector mode.
8.3 Insert the red test lead into “ “jack, and contact the measured point using the red test lead.
8.4 If the backlight flashes and the buzzer beeps, the measured line is live wire. If nothing changes, the measured line contacted by the red test lead is not live wire.

Note:
-Follow all safety rules when testing a live wire.
-This function is only designed to detect standard AC mains power lines (AC TIOV – 380V).

9. Auto Power Off (APO)
To save battery power and extend service life, APO function is already set by default when you turn on the Meter. It will automatically power off in 14 minutes without any operation. Before shutdown, the Meter gives 3 short beeps first, and then a long beep if still no further operation. To turn off the APO function, long press the “FUNC” button and rotate the switch to turn on the Meter. The APO function will reactivate after you switching on the Meter next time.

ELECTRICAL SPECIFICATIONS

Accuracy is specified for 1 year after calibration, at operating temperatures of 18°C to 28°C, with relative humidity at 0% to 75%. Accuracy specifications take the form of: + ({% of Reading] + [Counts] )
DC Voltage

Range| Accuracy| Resolution| Input Impedance| Overload Protection
---|---|---|---|---
600mV| ± (0.5% + 7)| 0.1mV| ≥10MΩ| 250V DC/AC rms
6V| 0.001V
60V| 0.0W
600V| 01V

AC Voltage (True RMS)

Range| Accuracy| Resolution| Input Impedance| Overload Protection
---|---|---|---|---
6V| ± (1.0% + 10)| 0.001V| ≥10MΩ| 250V DC/AC rms
60V| 0.01V
600V| ± (1.0% + 12)| 01V

Accurate measurement range: 10% to 100 % of range
Frequency response: 40Hz – 1kHz
Measuring method (sine wave): True rms
Crest factor: CF s 3, when CF 2 2, increases additional error of 1% of the reading

DC Current

Maximum input current: 10A (Measuring time: < 10 seconds, Recovery time: 2 15 minutes)
AC Current (True RMS)

Accurate measurement range: 10% to 100% of range
Frequency response: 40Hz – 1kHz
Measuring method (sine wave): True rms
Crest factor: CF < 3, when CF 2 2, increases additional error of 1% of the reading
Maximum input current: 10A (Measuring time: < 10 seconds,
Recovery time: 2 15 minutes)

Resistance

Range| Accuracy| Resolution| Short Circuit Current| Open Circuit Voltage| Overload Protection
---|---|---|---|---|---
600Ω| ± (0.8% + 5)| 0.1Ω| 255.5pA| Around 1V| 250V DC/AC rms
6kΩ| ± (0.8% + 4)| 0.001kΩ| 255.5pA
60kΩ| 0.01kΩ| 76.6pA
600kΩ| 0.1kΩ| 9.4E_IA
6MΩ| 0.001MΩ| 1.0pA
60MΩ| ± (1.2% + 10)| 0.01MΩ| 0.1p.A| Around 0.5V

Capacitance

DC/AC rms
60nF| ± (3.5% + 20)| 0.01nF
600nF| 0.1nF
6p.μF| 0.001μF
60μF| 0.01μF
600μF| 0.1μF
6mF| ± (5.0% + 10)| 0.001mF
20mF| 0.01mF

Accurate measurement range: 10% to 100% of rang Response time of largo capacitor (≥ ImF) Approx 5 seconds Measurement error doss not include the resistance o the lead wires.

Diode and Continuity

Range| Displayed Value| Test Condition| Overload Protection
---|---|---|---
| Forward voltage drop of the diode| DC Forward current is around 1.5mA, open circuit voltage is around 3.9V| 250V
DC/AC rms
If tested resistance is less than around
50 ± 20Ω, the buzzer beeps| Open circuit voltage is around 2V

WARNING: Do not input voltage when testing diode or continuity!
Frequency and Duty Cycle

For frequency measurement, input voltage range:
10Hz – 100kKHz: 1V rms <¢ input voltage < 20V rms,
100kHz – 1OMHz: 3V rms ¢ input voltage < 20V rms
For duty cycle measurement:
10% – 90%, suitable for 10Hz – 1kKHz square wave,
30% – 70%, suitable for 1kHz – 1OkHz square wave,
3V pp < input voltage < 20V pp

BATTERIES REPLACEMENT

When “ ” appears on the display, follow the steps below to replace the batteries:

1. Disconnect test leads from the circuit, rotate the function selection switch to “OFF”, and remove the test leads from the terminals.
2. Use a screwdriver to remove the screw from the case bottom and lift the battery door.
3. Remove the batteries and load the new ones.
4. Close the battery door and secure it with the screw.

Note:
-Battery Type: 2 x 1.5V AAA batteries
-Use only specified battery in this manual or on the Meter for replacement.
-Be sure to change the batteries in time, or it will affect measurement accuracy.

MAINTENANCE

1. Never disassemble the Meter or change the inner circuit.
2. Keep the Meter away from water and dust.
3. Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
4. Remove the batteries when the Meter is not in use for a long period.

TROUBLESHOOTING

If the Meter does not work properly, please read the table below:

selection switch to turn on the Meter
2.The measurement mode is wrong: Rotate the function selection switch to select a correct mode
3.Replace the batteries
appears on the screen| Replace the batteries
No current input| Replace the fuse
Big measurement error| Replace the batteries
Backlight is not bright| Replace the batteries

If your problems or inquiries cannot be eliminated after reading the table, please feel free to contact us.

DISPOSAL

Make sure you dispose of the product, accessories, batteries, and packaging in accordance with your local laws and regulations.

Manufacturer: Xi’an Beicheng Electronics Co., Ltd.
Address: Jingyuan 7th Road, Jinghe Industrial Park, Gaoling District,
Xi’an, China, 710000
Email: support@crenova.net Call: (+86) 755-83620439

YH Consulting Limited
C/O YH Consulting Limited Office 147,
Centurion House, London Road,
Staines-upon-Thames staines,
Surrey, London, TW18 4AX
H2YHUK@gmail.com
+44 07514-677868

E-Cross Stu GmbH
Mainzer Landstr.69
Frankfurt am Main,
Hessen, 60329 Germany
E-CrossStu@web.de
+49 69332967674

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