TRIPLETT LT80 LED Light Meter User Manual

TRIPLETT LT80 LED Light Meter

Product Information

The Triplett LT80 LED Light Meter is a device designed to measure light intensity from white LED light sources. It can also measure light from fluorescent, metal halide, high-pressure sodium, and incandescent sources for reference purposes (unspecified accuracy). The LT80 has a measurement range of up to 40,000 Fc (400,000 Lux).

Safety Instructions:

• Do not operate the meter in environments with explosive gases, combustible gases, steam, or dust.
• Replace the battery immediately when the low battery symbol appears on the LCD.
• Avoid touching the meter’s circuit board to prevent damage to sensitive components due to static electricity or contamination.
• This instrument is designed for pollution degree 2 and can be operated at altitudes up to 2000m (7000′).

Product Description:

1. Photo Detector Cover
2. Photo Detector (Sensor)
3. LCD Display
4. Lux/Fc Button
5. Calibration and ZERO Button
6. Data Hold Button
7. MAX/AVG/MIN Button
8. Power Button: ON/OFF

Product Usage Instructions

Power ON/OFF:

To power on the meter, long press the Power button. To power off the meter, short press the Power button.

Taking Measurements:

1. Switch on the meter and remove the protective cover from the sensor to expose the light sensor dome. Ensure fresh batteries are installed.
2. The meter measures the intensity of the light (illuminance) in foot-candles and Lux units, displaying the measured value on its LCD.
3. Position the meter and light source so that the light strikes the sensor dome directly and as perpendicularly as possible.
4. The meter’s display can show values up to 9999. For readings higher than this, the meter uses the x10 or x100 feature. For example, a measurement of 11,000 fc will be displayed as 1100 with the x10 indicator.

Auto Power OFF:

The meter automatically powers down after approximately 12 minutes of inactivity to save battery life.
To disable the Auto Power OFF utility, long press the Power button while the meter is ON (the Clock symbol will switch OFF).
Repeat this process to enable the Auto Power OFF utility.

LUX/FC Button:

Press the LUX/FC button to toggle between Lux and FC (foot-candles) measurement units.

MAX/AVG/MIN Button:

The meter can record maximum, average, and minimum readings as follows:

• Short press the MAX/MIN button to track the maximum/average/minimum measurements. The MAX icon will display at the top of the LCD window, indicating the meter is showing the maximum reading. The reading will not change until a higher reading is registered.
• Press the MAX/MIN button again to switch from MAX to AVG, where the meter will show the average measurement value. The AVG icon will be displayed above the value.
• Press the MAX/MIN button again to change the mode from AVG to MIN, where the meter will show the minimum measured value. The MIN icon will be displayed.
• Press the MAX/MIN button again to switch from MIN back to MAX.

Introduction

Congratulations on your purchase of the Triplett LT80 LED Light Meter that measures light intensity from white LED light sources. The LT80 can also measure light from fluorescent, metal halide, high‐ pressure sodium, and incandescent sources, for reference only (unspecified accuracy). The LT80 can measure light up to 40,000 Fc (400,000 Lux).

Safety

• Do not operate the meter in environments where the following are present: explosive gases (or materials), combustible gases (or materials), steam, or dust.
• Please replace the battery immediately when the low battery symbol appears on the LCD.
• Do not touch the meter’s circuit board for any reason; static electricity or contamination could damage the sensitive components.
• This instrument was designed for pollution degree 2. Operation Altitude: Up to 2000m (7000’).

Description

1. Photo Detector Cover
2. Photo Detector (Sensor)
3. LCD Display
4. Lux/Fc Button
5. Calibration and ZERO Button
6. Data Hold Button
7. MAX/AVG/MIN Button
8. Power Button: ON/OFF

Operation

Power ON/OFF
Long press the Power button to power the meter. To power the meter OFF, short press the Power button

Taking Measurements

1. Switch the meter ON and remove the sensor’s protective cover to expose the light sensor dome. The display should switch ON; if not, check that batteries are installed and fresh.
2. The meter measures the intensity of the light (illuminance) that strikes the sensor dome in foot‐candles and Lux units (1 fc = 10.76 lux), displaying this measured value on its LCD.
3. Position the meter and light source so that the light strikes the sensor dome straight on (perpendicular) with as little an angle as possible.
4. The meter’s display can show a value up to 9999. However, for readings that represent measurements higher than this, the meter uses x10 or x100 feature. For example, to represent a measurement of 11,000 fc the meter will display 1100 with the x10 indicator.

Auto Power OFF
To save battery life, the meter powers down automatically after approximately 12 minutes of inactivity.

Enable/Disable Auto Power Off

• While the meter is ON, long press the Power button to disable the Auto
• Power OFF utility (the Clock symbol will switch OFF). To enable the Auto Power OFF utility, repeat this process.

LUX/FC Button

Press the LUX/FC button to toggle between Lux and FC (foot‐candles) measurement units

MAX/AVG/MIN Button

• The meter can record the maximum, minimum, and average readings as described below:
• Short press the “MAX/MIN” button and the meter will begin to track the maximum/average/minimum measurements; the “MAX” icon will display at the top of the LCD window indicating that the meter is now showing the maximum reading. The reading will not change until a higher reading is registered.
• Press the “MAX/MIN” button again to switch from “MAX” to “AVG”, where the meter will show the average measurement value. The “AVG” icon will be displayed above the displayed value.
• Press the “MAX/MIN” button again to change the mode from “AVG” to “MIN”, where the meter will show the minimum value measured. The “MIN” icon will be displayed.
• Press the “MAX/MIN” button again to switch from “MIN” back to “MAX”.
• To exit this mode, hold the “MAX/MIN” button for at least 2 seconds. The MAX/AVG/MIN icons should all be switched OFF when the unit returns to the normal operating mode.

HOLD Button
Press the HOLD button to freeze the current reading on the LCD. Press the HOLD button again to release the reading. In the Data Hold mode, HOLD is displayed on the LCD.

Zero Calibration Procedure

Ensure that the protective cap is attached to the light sensor.
Power the meter and the LCD should display ‘0’.

1. Short press the “CAL ZERO” button to perform the zero adjustment (CAL will appear on the display).
2. The CAL display will switch off when the calibration has been completed
3. If the protective cap is not covering the sensor when the Zero calibration is started the LCD display will read CAP. In this case, please cover the sensor with the cap and restart this procedure

Measurement Tips

For maximum accuracy allow the light being measured to fall directly on the sensor as perpendicular as possible with a minimal angle of incidence.When the meter is not in use, please keep the protective cap in place over the light sensor. This will prolong the life of the sensor.
When the meter is to be stored for long periods, please remove the batteries and store them separately. Batteries can leak and cause damage to the meter’s components.
Avoid areas of high temperature and humidity when using this instrument

Battery replacement

WARNING
If the symbol “ ” appears on the LCD, please replace the battery immediately

1. Turn off the instrument.
2. Remove the battery cover
3. Replace the battery.
4. Install the battery cover

Specifications

99.99,999.9,9999,40,000 Footcandles

Resolution| 0.1,1, 10,100 Lux

0.01,0.1,1,10 Footcandles

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Accuracy

| ±3% ±3Lux(0~500Lux), ±3%(up 501 Lux)

(Calibrated to standard incandescent lamp 2856°K) 8% other visible light source

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Angle deviation from cosine characteristics

| 30°| ±2%
60 °| ±6%
80 °| ±25%
Power Supply| 2 batteries 1.5V AAA MN2400 LR03 AM4
Battery life| About 200 hours
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Dimensions

| 133(L)x48(W)x23mm(L) Hmm

5.3(L)x 1.9(W) x0.2(L) inch

Weight| 250g (include battery)
Accessories| User’s manual, carrying case, 1.5V battery*2

Relative Spectral Sensitivity

The deviation from the comparative standards for luminosity is determined by JIS standard C 1609-1993.
Peak sensitivity wavelength: 550 nm.

Typical Light Levels (1 Fc = 10.76 Lux)

Lux| Foot Candles|  | Lux| Foot Candles|
---|---|---|---|---|---
 |  | Factories|  |  | Home
20‐75| 2‐7| Emergency Stairs, Warehouse| 100‐150| 10‐15| Washing
75‐150| 7‐15| Exit/Entrance Passages| 150‐200| 15‐20| Recreational

Activities

150‐300| 15‐30| Packing Work| 200‐300| 20‐30| Drawing Room,

Table

300‐750| 30‐75| Visual Work: Production Line| 300‐500| 30‐50| Makeup
750‐1,500| 75‐150| Typesetting: Inspection Work| 500‐1,500| 50‐150| Reading, Study
1,500‐3,000| 150‐300| Electronic Assembly, Drafting| 1,000‐2,000| 100‐200| Sewing
 |  | Office|  |  | Restaurant
75‐100| 7‐10| Indoor Emergency Stairs| 75‐150| 7‐15| Corridor Stairs
100‐200| 10‐20| Corridor Stairs| 150‐300| 15‐30| Entrance,

Wash Room

200‐750| 20‐75| Conference,

Reception Room

| 300‐750| 30‐75| Cooking Room,

Dining Table

---|---|---|---|---|---
750‐1,500| 75‐150| Clerical Work| 750‐1,500| 75‐150| Show Window
1,500‐2,000| 150‐2000| Typing, Drafting|  |  |
 |  | Store|  |  | Hospital
75‐150| 7‐15| Indoors| 30‐75| 3‐7| Emergency Stairs
150‐200| 15‐20| Corridor/Stairs| 75‐100| 7‐10| Stairs
200‐300| 20‐30| Reception| 100‐150| 10‐15| Sick Room,

Warehouse

300‐500| 30‐50| Display Stand| 150‐200| 15‐20| Waiting Room
500‐750| 50‐75| Elevator| 200‐750| 20‐75| Medical Exam Room
750‐1,500| 75‐150| Show Window,

Packing Table

| 750‐1,500| 75‐150| Operating Room
1,500‐3,000| 150‐300| Storefront, Show Window| 5,000‐10,000| 500‐1000| Eye Inspection

Warranty Information

Triplett / Jewell Instruments extends the following warranty to the original purchaser of these goods for use. Triplett warrants to the original purchaser for use that the products sold by it will be free from defects in workmanship and material for a period of (1) one year from the date of purchase. This warranty does not apply to any of our products that have been repaired or altered by unauthorized persons in any way or purchased from unauthorized distributors so as, in our sole judgment, to injure their stability or reliability, or which have been subject to misuse, abuse, misapplication, negligence, accident or which have had the serial numbers altered, defaced, or removed. Accessories, including batteries, are not covered by this warranty
Copyright © 2020 Triplett

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