The LMS meter is very easy to operate. It is designed to measure the luminous of light in the unit of Lux. It has only an on/off switch to display readings on a large seven segment LCD display. The LMS meter comes in a specially designed hand held case.

Introduction

Digital light meter is design to measure the Luminous of light in the unit of Lux. The meter indicates the lumen of light measurement on a large 31/2, 7-segment LCD display. The units display the measured range from 0 to 199900 Lux. It is use 9V battery as a power source.
It is using a quick respond silicon photo pin diode as a sensor material with the operating temperature of -40 degree to 80 degree Celsius.

Components

·LMS meter ·9 Volt battery
Preparing and Measuring Luminous of Light 1.Unpack meter 2.Turn the switch on, which locate at the right hand side of the meter. 3.Held the meter to the light source you want to measure (be sure to point the sensor toward to light source). 4.In a few second the display unit will indicate the value of the measured light

Calibration of the Light

If calibrated is needed, use a new High Pressure Sodium (H.P.S) or Metal Halide (M.H) bulb to calibrate. Mount the bulb vertically and measure one foot away from the middle of the bulb. Below is the specification of the bulb for calibrate the meter (Table 1):
Table 1
1.Insert a small flat head screwdriver into the left of the two’s calibration hole (Figure 1). Gently turn the screwdriver until it is properly seated in the screw slot. Figure 1. 1: Calibration 2.Slowly turn the screwdriver to adjust the reading until it matches the Luminous of the bulb. 3.If you need a higher rang on the reading please insert a small Phillip (#00) screwdriver into the right of the two’s calibration hole. Gently turn the screwdriver until it is properly seated in the screw head. Make sure don’t over turn it or else you will damage the Calibration resistor. 4.Slowly turn the screwdriver to adjust the range. 5.After you finish adjusts the range; don’t forget to recalibrate the reading-using step 1 and 2.

WARRANTY POLICY: We have two years limited warranty on all of our meters.

First Year:

One-year manufactures’ parts and labour warranty on all of our LMS meter.

Second Year:

The customer can change their defective meter (only if the problem is a manufacture part’s defect) with our reconditioned meter for the cost of $40.00 plus $5.00 shipping and handling charge. The reconditioned meter comes with a six months manufactures warranty on parts, probe and labour.

This tool is totally required, as far as I am concerned. I never much thought about these lumens they talk about, the output of your bulb you know. I totally thought that my bulbs were fine, they 'looked' bright to me, but I took that light meter to it, and the lumens were low, like 342 for my 400w plantastar HPS. I found out that a 400w bulb should be pushin some where in the vicinity of 490. Wow, this meter saved my crop for sure. I would have been wondering what
the !?*#!, happened. Wicked gear for your garden, without big expense.

Incredible! Superb! two thumbs up. The guy at BTN Winnipeg said that I was running my bulbs way to straight in a line. He convince me to buy a light meter and told me to do the before and after test. After staggering the lights to the the left and right and down to drop the odd bulb. It was incredible 15% higher on the light meter. I was getting way more light to my tomatoes. More light the bigger the tomatoto. Would of score 5 out of 5 but unit is kind of ugly. MTUSA