How To Use Astroai Digital Multimeter

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AstroAI ASIMT33D Digital Multimeter User Manual

Cheers for purchasing the Digital Multimeter from AstroAl. The AstroAl Digital Multimeter is designed to be safely and accurately used in schools, laboratories, factories and other social/industrial fields. This user transmission provides all the safety information, operation instruction, specifications, and maintenance for the meter. This instrument performs Ac/DC Voltage, DC Current, Resistance, Diode Testing and Continuity Testing. Thank you once again for choosing AstroAl, if you lot have any questions or concerns regarding your product, delight contact united states of america at [electronic mail protected].

NOTE:
Fully read and cover this transmission before using this Digital Multimeter.

WARNING

To avoid possible electrical shocks, personal injury and to avoid possible damage to the Meter or to the equipment being tested, adhere to the post-obit rules:

Use the Meter strictly in accordance with this manual, otherwise the protection office provided by the Meter may be damaged or weakened.
Delight be especially conscientious when measuring over 60V DC, 30V Air conditioning RMS or 42V peak value, there is a danger of electric shocks.
Do not apply more than the rated voltage marked on the Meter, betwixt the terminals or between whatsoever terminal and grounding.
Check whether the Meter is working commonly by measuring the known voltage, do not utilise it if the readings are incorrect or the Meter is damaged.
Before using the meter, please bank check whether there are cracks or damage to the plastic parts of the meter casing. Do not utilise the Meter if all or function of the exterior casing is damaged.
Earlier using the Meter, please bank check whether the test leads are cracked or damaged. Delight supervene upon the examination leads with those of the same model and same electric specifications if the leads are damaged.
Use the Meter co-ordinate to the measurement category, voltage or current rating specified on the meter or manual.
Comply with local and national prophylactic regulations. Wear personal protective equipment (such as approved rubber gloves, masks, and flame-retardant clothing, etc.) to prevent injury from electric shocks and arcs when hazardous live conductors are exposed.
Supplant the battery every bit soon as the low-battery indicator appears to avoid measurement errors.
Do not utilize the Meter around explosive gas. steam or humid environ rne
vvhntens. using the exam leads, proceed your fingers behind the finger guards.
When measuring, connect the neutral wire or footing wire offset, then connect the live wire; when disconnecting. disconnect the live wire first, and so disconnect the neutral and ground wires.
Before opening the case or bombardment embrace, remove the test leads from the Meter first. Exercise non employ the Meter when it is disassembled or when the battery embrace is opened.
The Meter can only be used with the equipped exam leads to meet the requirements of safety standards If the test leads are damaged and need to be replaced, replace simply with the same model and the same electrical specifications.

ELECTICAL SYBOLS

	AC (Alternating Current)	Low Battery Symbol
	DC (Directly Electric current)	Audible Continuity Test
V	Voltage	Diode Test
A	Electric current	Resistance Examination
	Square Wave	Earth Basis
	Double Insulation	Warning
	Compliant with EU Standards

SIZE

DIAGRAM

LCD Screen
Hold Button
Backlight Push
Rotary Switch
OFF
DC Voltage Test
Resistance
AC Voltage Test
DC Current Examination
Square Wave Output
Continuity Examination/Diode Test
10A Termina
vnwm Terminal
Com Last
Test Leads

GETTING TO KNOW YOUR DEVICE

Push FUCNTIONS


BUTTONS	FUNCTIONS
	Press the HOLD button to hold or cancel the data. Press this button while performing a examination to hold (freeze) the reading for recording, then the screen will keep the reading when the concur function is activated. Press the HOLD push again to plough off this part. Annotation : The screen will display" Ou "when the data hold function is activated.
	Press the Backlight button to plough on the screen's backlight. The backlight allows you to get a articulate reading in a dim environ ment. When the backlight is turned on, it will plow night slowly until information technology is completely off. When the calorie-free turns dark, press the button again and it volition plow bright again. If yous need to plow off the backlight speedily, motility the rotary switch to the off position.


	Plug the ruby test lead into 10A terminal when using the 10A setting of DC electric current test.
	Plug the cherry-red exam lead into "2" final when you need to use functions other than 10A.
three	Plug the black test pb into the COM terminal.

REPLACING THE Battery AND FUSE

Turn off the Meter and remove the test leads.
Unscrew the screws (that fix the battery encompass) with a screwdriver, and remove the battery encompass.
Remove the former bombardment and supervene upon it with a new battery of the same specification.
Put the battery encompass dorsum to its original position and fix the battery cover with the removed screws.
Battery Type: i x 9V Battery NEDA 1604/6F22/006P

REPLACING FUSE

THE SPECIFICATIONS OF FUSES

Fuse 1: F500mA/600V fuse; Size:p5*20mm
Fuse 2: F10A/600V fuse; Size:p5"20mm

OPERATION INSTRUCTIONS

To avoid damage to the Meter, do not measure voltages exceeding SOOV.
This Meter is a manual range Multimeter. Please be sure to cull the correct measuring range to prevent damage.
Pay special attention to safe when measuring high voltages to avoid electric stupor or personal injury.
Earlier using the Meter to examination a known voltage or current, confirm that the Meter functions piece of work properly.

MEASURING Ac/DC VOLTAGE

MEASURING DC VOLTAGE

NOTE

Of The test unit of "v=" area is "V "; If the number on the white area is followed by "one thousand", then the exam unit is "mV".
If the measurement range is the maximum, that is, 500 V setting, "HV" volition exist displayed on the screen.
Connect the examination leads to the excursion under exam (connect the leads in parallel to the ability supply or circuit under test) to measure.

Note

@ If the reading is negative when measuring the DC voltage, it means that the positive and negative poles of the test leads are reversed, please alter the examination leads.
After the reading stabilizes, record the reading from the LCD screen.
Turn the rotary switch to the OFF position to turn off the Meter.

MEASURING Air-conditioning VOLTAGE

NOTE
@ The test unit of measurement of "5 "surface area is "V". ii If the measurement range at the maximum (SOOV setting) "HV" will be displayed on the screen.

Connect the test leads to the excursion under test (connect the leads in parallel to the power supply or circuit under exam) to measure.
Afterwards the reading stabilizes, record the reading from the LCD screen.
Turn the rotary switch to the OFF position to turn off the Meter.

VOLTAGE TIPS

HOW TO Observe A Alive WIRE IN A SOCKET

Switch to the voltage test setting.
Connect the black examination lead to the grounded wire or jack. Connect the red exam lead to ane of the jacks to be measured.
Check both jacks. One should accept a reading and the other should remain at or near zero. The live wire volition have the reading.

VOLTAGE NOTES

Choose the SOOV setting to mensurate the unknown voltage first, and then select the appropriate range co-ordinate to the voltage.
To avoid damage to the meter, practise not mensurate voltage exceeding SOOV DC or SOOV Air conditioning CATII.
If the AC setting is used to measure DC and vice versa, an overflow symbol will exist displayed. Performing this activity has the potential to damage the Meter or any components you are attempting to examination.
When measuring voltage, the effect will fluctuate depend ing on the power supply. By and large, the issue will fluctuate +10V, which is NOT an inaccurate consequence.

MEASURING DC CURRENT

MEASURING DC A CURRENT

Disconnect the ability supply of the excursion under test.
Insert the ruddy test lead into the "VDmA-'Tr" concluding and the black examination lead into the "COM" concluding.
Turn the rotary dial to the continuity examination, touch the cerise and blackness test leads to bank check whether they are normal. The buzzer will e beep if the test leads are normal.
Turn the rotary dial to the "A=" expanse with yellow font. The screen will display "000" indicating that the measurement role is a DC A current from 200pA to 200mA.

Annotation
@ The test unit of " A= "area is "A"; If the number on the yellowish area is followed past "m™, and then the test unit is "mA".
Choose a larger setting to measure the unknown current starting time, and and so select the appropriate range according to the current.
Connect the Meter to the excursion nether test in series, and and then turn on the ability supply of the circuit.
Afterwards the reading stabilizes, record the reading from the LCD screen.
Turn the rotary switch to the OFF position to turn off the Meter

AUTOMOTIVE PARASITIC BATTERY Drain

Bank check if the battery voltage and power generation are within normal range. The battery voltage is generally around 12.7V and the power generation is effectually 14V.
Plough off all electric accessories inside and exterior the car and close the doors.
Remove the negative electrode of the battery. Set the Multimeter to the maximum current level and connect the Meter in series to the battery.
Connect the red test pb to the negative line and the black exam lead to the bombardment terminal.
Arrange the Meter, if necessary, to a lower range.
Wait for most 30 minutes; after all the modules of the vehicle have entered the sleep state, read the accurate static discharge current. The discharge current is generally 0.02A (20mA), however, this can vary depending on the vehicle. Normally it volition non exceed 50mA.
If the drain is larger than 50mA, begin checking fuses individually for which circuit is carrying the excess load.
If a removed fuse reduces the battery depict to beneath 50mA, information technology can exist determined that the corresponding excursion is drawing the excess belch.

Electric current NOTES

Cull the maximum setting to mensurate the unknown current first, and then select the appropriate range according to the current.
If you insert the red test pb into the 10A jack, exist certain to insert the test lead dorsum into the " VnmAm " jack subsequently the examination to avoid forgetting to switch the jack for the next performance and thus burning the Multimeter.
When testing a high electric current, for prophylactic reasons, each measurement time should be less than ten seconds, and the interval fourth dimension between tests should be greater than 15 minutes.
When testing the current, there must exist a load in the excursion. Practice non connect the multimeter in series with the excursion without a load to measure; doing so tin potentially damage the Meter.
Do not apply a electric current exceeding the Meter'south range to avoid damaging the Meter.

MEASURING RESISTANCE

NOTE

The test unit of "Cl" area is "Cl"; If the number on the yellow expanse is followed past a"1000", then the exam unit of measurement is "Dr."; If the number on the yellow area is followed by a "K", and so the examination unit of measurement is "KPI".
Choose a larger measurement range to measure the unknown resistance beginning, then select the appropriate range according to the resistance.
Connect the test leads to both ends of the circuit or resistor nether examination (connect the leads to the resistance under examination in parallel).
Subsequently the reading stabilizes, record it from the LCD screen.
Plough the rotary switch to the OFF position to plow off the Meter.

RESISTANCE NOTES

Do non modify the resistance while taking a measurement.
Doing so may damage the Meter and affect the test results.
Practise non test parallel circuits. The accurateness of the measurement will be afflicted, and the results may not be accurate.
Exercise non directly measure the internal resistance of micrometers, galvanometers, batteries, and other instruments.

CONTINUITY Test

DIODE TEST

Insert the blood-red test lead into the "VCtmAm" terminal and the black test lead into the "COM" final.
Turn the rotary dial to the " ++' " setting. touch the ruby-red and the blackness exam leads to cheque whether they are normal. The buzzer will beep if the test leads are normal.
Connect the red test lead to the anode of the diode nether test and the black examination atomic number 82 to the cathode of the diode.
NOTE
Usually the anode of the diode is the longer end.
The LCD screen will display the approximate voltage drop reading of the diode. The exam unit is "mV". If the exam leads are connected in reverse, "ane" will exist displayed on the LCD screen.
Delight supersede the test leads to measure once again.
Turn the rotary switch to the OFF position to turn off the Meter.

DIODE TEST TIPS

Is the diode functioning correctly: If the red exam pb is connected to the positive pole of the diode and the black pb is continued to negative, then the diode should be in a forward conduction land, and the displayed value is the forward voltage drop.
Normal diode frontward pressure level drop: the general silicon tube is 0.five- 0.vii V, germanium tube is 0.15-0.3V.
You can also verify that the crimson test lead is connected to the negative pole of the tested diode and the black test rod is connected to the positive pole. The diode should brandish"ane″.

POLARITY JUDGMENT METHOD

Switch the Multimeter to the Resistance setting.
Connect the two test leads to the two electrodes of the diode.
Measure 1 upshot, and so swap the positions of the test leads and measure the second result.
The larger result is the contrary resistance and the smaller result is the forward resistance. The smaller resistance is when the blackness test pb is connected to the positive terminate of the diode and the cherry atomic number 82 is connected to the negative terminate.

Foursquare WAVE OUTPUT

MAINTENANCE

CLEANING THE METER

If there is dust or humidity in the terminals, it may produce erroneous measurements. Please clean the Meter every bit follows:

Turn off the ability to the Meter and remove the test leads.
Plow the meter over and milkshake out the dust accumulated in the input jack, wipe the case with a damp textile or balmy detergent. Wipe the contacts in each terminal with a make clean cotton swab dampened in alcohol.

SPECIFICATIONS

Accuracy is guaranteed for i year, with storage conditions of 23°C+5°C, less than 80%RH

Digital Display	2000, 3 /
Sampling Speed	two Times/Second
LCD Dimensions	49 x 17mm
Range Selection	Transmission
Polarity Indication	"-" Automatically Displayed
Overload Indication	"1" Displayed
Low Battery Indication	" "displayed when battery voltage is lower than normal
Piece of work Environment	32-104 °F; 0-forty °C, at <80%RH
Storage Temperature	14-122 °F; -10-50 °C, at <85%RH
Power	1 x 9V Battery NEDA 1604/6F22/006P
Weight	Approximately 145g
Dimensions	130 10 73 x 37mm

DETAILED SPECIFICATIONS

Accuracy is guaranteed for ane year, with storage weather condition of 23°C+five°C, less than eighty%RH

DC VOLTAGE

Range	Resolution	Accuracy	Overload Protection
200mV	100pV	* (0.5%+3)	220V RMS Air conditioning
2000mV	1mV	1 (0.8%+2)	SOOV DC / SOOV RMS
20V	10mV
200V	100mV
SOOV	1V	* (0.8%*three)

Ac VOLTAGE

Range	Resolution	Accuracy	Overload Protection
200V	100mV	*(ii.0%+10)	SOOV DC / SOOV RMS
SOOV	1V	*(ii.0%+10)	SOOV DC / SOOV RMS

DC Electric current

Range	Resolution	Accuracy	Overload Protection
2000pA	1pA	* (ii.0%+five)	500mA, 600V fuse
20mA	10pA
200mA	100pA
10A	10mA	* (2.5%+5)	10A, 600V fuse

Measured Voltage Driblet: 200mV

RESISTANCE

Range	Resolution	Accuracy	Overload Protection
200CI	0.1CI	*(1.v%v)**	15 seconds maximum exposure to 220Vrms
2000CI	1CI	* (1.0%*4)
20KCt	10CI
200KCI	100D
20MCI	10KCI	-50 (one.0%+10)
200MCI	100KCI	-L (i.0%+x)

Maximum Open up Circuit Voltage: 3V

CONTINUITY TEST

Range	Resolution	Overload Protection
	Congenital-in buzzer sounds if resistance is less than 301-20CI	15 second maximum exposure to 220V RMS

INCLUDED IN BOX

1 10 User Manual
1 x Pair of Test Leads
1 x AstroAl Digital Multimeter

1 YEAR Limited WARRANTY FROM ASTROAI

Each AstroAl Digital Multimeter will be free from defects in material and workmanship. This warranty does not cover fuses, disposable batteries and damage from neglect, misuse, contamination, amending, blow, or aberrant weather of performance or handling, including over-voltage failures caused by employ outside the Meter's specified rating, or normal wear and tear of mechanical components. This warranty covers the original purchaser only and is not transferable. If this production is defective, delight contact AstroAl Customer Back up at [e-mail protected]

Spider web: world wide web.astoai.com
Due east-postal service: [email protected]

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