LX20 - Measurement Sanwa - Free user manual and instructions

Product Type	Digital Multimeter
Brand	Sanwa
Model	LX20
Category	Measurement
Display Type	LCD, 4000 counts
DC Voltage Range	400mV to 600V
AC Voltage Range	400mV to 600V
DC Current Range	400μA to 10A
Resistance Range	400Ω to 40MΩ
Additional Functions	Continuity test, diode test, capacitance, frequency
Safety Rating	CAT II 600V, CAT III 300V
Power Supply	2 x AAA batteries (1.5V)
Auto Power Off	Yes, after approx. 15 minutes
Dimensions	140 x 70 x 30 mm
Weight	Approx. 200 g (including batteries)
Input Impedance	≥10 MΩ (DC/AC V)
Operating Temperature	0°C to 40°C
Accessories Included	Test leads, batteries, manual
Warranty	1 year limited warranty
Maintenance	Keep clean and dry; replace batteries when low

Frequently Asked Questions - LX20 Sanwa

How do I measure DC voltage with the Sanwa LX20?

Turn the rotary switch to the DC voltage position (usually marked 'V' with a straight line or 'DCV'). Connect the black test lead to COM and red to VΩHz. Touch the probes to the circuit and read the display. Note the polarity: if the red probe is negative, the display will show a minus sign.

Can the LX20 measure AC current?

Yes, it can measure AC current up to 10A. Select the appropriate current range (μA, mA, or A) and press the 'AC/DC' button if needed. Connect the test leads in series with the load. Never exceed the rated current for more than 30 seconds for the 10A range.

How do I test continuity with this multimeter?

Turn the dial to the continuity/beep setting (usually a diode symbol with sound waves). Connect the probes across the component or circuit. If the resistance is less than about 50Ω, the meter will emit a continuous beep. Ensure the circuit is powered off before testing.

What is the symbol for diode test on the LX20?

The diode test function is usually combined with continuity and indicated by a diode symbol (→+). Select that position. The meter will display the forward voltage drop across the diode. A good silicon diode typically reads 0.6-0.8V.

How do I replace the batteries in the Sanwa LX20?

Turn off the meter and remove the test leads. Unscrew the battery cover screw (usually at the back). Lift the cover and replace the two AAA batteries with new ones, observing polarity. Replace the cover and screw. Dispose of old batteries properly.

Does the LX20 have an auto-ranging feature?

Yes, the LX20 is an auto-ranging multimeter. It automatically selects the appropriate measuring range for voltage and resistance. For current, you may need to select the manual range depending on the jack used. Press the Range button to switch to manual ranging if needed.

What safety precautions should I take when using the LX20?

Always use the correct input jacks (COM vs VΩHz vs A) and select the proper function. Never measure voltage on high-energy circuits above the CAT rating (600V CAT II). Inspect test leads for damage before use. Ensure the meter is set to the correct measurement type and range before connecting.

Can I measure capacitance with the LX20?

Yes, the LX20 includes a capacitance measurement function. Select the capacitance mode (usually labeled 'F' or 'CAP'). Discharge the capacitor before testing. Connect the probes to the capacitor leads (red to positive, black to negative for polarized caps) and read the value. Accuracy may be reduced for very small or large capacitors.

What does 'OL' mean on the display?

'OL' stands for Over Load and indicates the input exceeds the meter's maximum range for the selected function. This can happen if you measure voltage on a resistance range, or the voltage is too high. Immediately disconnect and select a higher range or proper function to avoid damaging the meter.

How do I clean and maintain my Sanwa LX20?

Wipe the exterior with a damp cloth and mild detergent. Do not use solvents. Remove batteries if storing for extended periods. Keep the terminals clean. Calibration is recommended every year for professional use. Store in a dry, dust-free environment.

USER MANUAL LX20 Sanwa

How to store the light sensor probe
The light sensor probe can be stored in the main body as shown below. 1-Fit the light sensor probe into the storage position so that the light sensor window faces up.
2. Bend the cord and store it in the space on the right of the light sensor probe.

[7] Maintenance and Administration
To maintain accuracy, perform calibration and inspection
at least once a year.
1. Maintenance check
1) External finish • Check if the external finish is damaged by dropping the
- Check if the external finlism is damaged by dropping the instrument, etc.
2) Light sensor
- Check if the light sensor window is damaged
- Check if the light sensor cord is damaged
If any of the above parts is damaged, do not use the instrument but have it repaired.

1. Calibration

For calibration and inspection of the instrument, please

contact dealer, sole agent and maker.

1. Battery replacement Replacement Procedure:

1) Remove the screw retaining the battery compartment

cover using a Phillips screwdriver.

2) Remove the battery compartment cover and take out the exhausted battery.

3) Insert a new battery without mistaking the + and - polarity. 4) Attach the battery compartment cover and clamp it with the screw.

,

The button-battery is made

of oxidized silver, etc.

Please keep it away from little children lest they should

CAUTION

Set a battery with its polarities facing in the correct directions.

Batteris when the meter is shipped:

A battery for monitoring has been installed prior to shipment from the factory.
It may be discharged before the expiration of the described battery life.
The battery for monitoring is a battery used to check the functions and performance of the product.

performance of the product.

1. Storage

- The panel and case are little resistant to volatile solutions and heat. Do

not wipe the instrument using lacquer thinner or alcohol and do not place it beat a course of high temperatures (celdering iron, for example)

- Do not store the instrument in a place subject to vibrations or in a place

from it may drop.

- Do not store the instrument under direct sunlight

temperatures, high humidity or condensation.

- Be sure to remove the battery when the instrument is not to be used for an extended period.

[8] AFTER-SALE SERVICE

1. Warranty and Provision

Sanwa offers comprehensive warranty services to its end-users and to its
product resellers. Under Sanwa's general warranty policy, each instrument is
warranted to be free from defects in workmanship or material under normal use for the period of one (1) year from the date of purchase.

for the period of one (1) year from the date of purchase. This warranty policy is valid within the country of purchase only, and applied only

Thank you for purchasing SANWA illuminance meter LX20. Read this manual carefully before using the instrument for safety use. Retain this manual together with the instrument or future reference.

[1] Operating Precautions

- Be careful not to stain or damage the light sensor window. If the light sensor window gets dirty, wipe lightly with a soft, dry cloth.

- Do not move the light sensor probe cord during measurement, as this may result in variation of the displayed value. Take special care not to move the cord particularly during measuring low illuminance values. - This instrument incorporates the auto power save

- This instrument incorporates the auto power save function, which turns it off in 15 minutes after an operation. To turn the instrument on after it has been turned off by the auto power save function, set the Range switch to OFF and keep it in the OFF position for more than 1 second before setting it to another position. - Be sure to set the Power/Range switch to OFF after use.

[2] Applications

This instrument is a pocket-sized illuminance meter featuring excellent portability and operability. It can be applied easily to a wide range of purposes from brightness checking in daily life to illumination maintenance in offices and factories as well as illumination management in agriculture and forestry.

[3] Features

- Easy-to-carry pocket size.

- Separate, stick-shaped light sensor (window diameter 9 mm) from the main body enables measurement of a narrow position or area. The light sensor can also be integrated with the main body for measurement. - 4039 full-scale count with a bar graph display.

1

• Improved measurement accuracy by using a silicon photodiode, which has a spectral sensitivity approximating the relative luminous efficiency specified by CIE (Commission Internationale d'Eclairage), in the light sensor.

- Wide measuring range of 0.1 lx to 403.9 klx (403,900 lx).

- Data hold function. - Auto power save function prevents wasting of battery power.

[4] Nomenclature

[5] Functions

• Power/Range switch

This rotary switch is used to turn the illuminance meter on-off and switch the measurement range to the 400 lx, 4000 lx, 40 klx or 400 klx range.

- Battery warning indicator

When the internal battery is nearly exhausted and the supply voltage drops, blinking "BT" appears in the display. If this happens, please replace the battery with new one. Data Hold button (Also used as the protection cover lock) Push this button during measurement to hold the digital

- current value and bar graph display. "DH" appears in the display while the display data is held. Pushing this button again releases the data hold function and causes "DH" to disappear from the display.

How to integrate the light sensor probe with the main body for measurement Insert the light sensor probe in the position on the top left of the main body as shown in the figure on the right. How to open or close the protective cover 1. To open the protective cover, push and hold the button on the left side of main body into the direction shown in the figure, and open the protective cover.

1. To close the protective cover, first store the light sensor probe in the storage position of the main body and then close the protective cover until it is locked.

[6] measurement

Measurement Procedure

1. Set the measuring range according to the illuminance to be measured.
2. Extend the light sensor probe cord to the point you want to measure illuminance and point the light sensor window toward the measurement target light source.

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It is also possible to measure illuminance while the light sensor probe is integrated with the main body.

1. After completing measurement, set the Power/Range switch to OFF.

- When over range, displays "OL".

The illuminance reference plane is located at the

• top of the sensor as shown below illustration.

Illuminance reference plane

Notes: The auto power curve function of the instrument turns it

The auto power save function of the instrument turns off in 15 minutes after an operation. To turn the instrument on after it has been turned off by the auto power save function, set the Range switch to OFF and keep it in the OFF position for more than 1 second before setting it to another position.

Reference: Illuminance Standard in JIS Z 9110

Type of store	30 15 x70150/3007001500
Housing
	* Sewing (dark shafting)	* Study: "reading (long hours or small offers), sewing	"Reading," Makeings—Graying	Living room, children rooms, drawing room, dining room, kitchen		Entrance, scarcesses, corridors, emergency scarcases, garage
Schools	* Precision drafting	Drafting room, restaurant, laundry reading rooms, smartwatches, gymnasium	General classrooms, special classrooms, handwatches, scarissances		Auditorium, meeting rooms, corridors, warehouses		Emergency scarcases
Offices	* Designers, "drinking," "exclusion," key punching	"Drinking," "exclusion," telephone exchange room, power distribution panel instrument meter panel		Workshop, ticket rooms, scarcases, bathrooms	Emergency scarcase
Roads and parks				Exposureary tunnelsThe entrance of the Road's entrance is higher than the level.)
Hospitals	Operating (top 10,000 or more)	Operating room, emergency room, service station, medicine preparation, technical lab., school	Consultation rooms, treatment room, usual indoor hospital rooms, respiratory, waiting rooms, home office	Pre-consultation rooms, medical rooms, X-ray rooms, medicine warehouse.	70–15: 15–16Tunnels High-risk roads	1.5: 0.5Low-risk roads, roads, parks and open roads in residential areas
Theaters			"Ticket counter, antizoresms, scarcases	Projection booth, corridors, scarcases	Audience rooms (during immersion), emergency scarcases, garage		3: 15 Audience rooms (during shows)
Hotels		Accounting office	Reception desk, restaurants	Guestrooms, entertainment room, customs, body
Restaurants		* Sample cases	* Cash register, cooking room, tables	Outdoor rooms, walling rooms and passages
Beauty stores and barriers		* Hairdressing, "do' hair swelling," makeup		Manual lighting
Shops	* Lighting in line with shoes, "defibrating" showerheads		General exhibitions, general lighting
Department/food stores	* Sea waves, pool for recedors, water for lakes		Exhibitions with ambiance

The specified illuminance can be obtained by combining local illuminations. In this case, it is still desirable that the general illumination illuminance is more than 1/10 of the illuminance achieved using the local illumination.

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