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29. A Warning about Mercury •While mercury-filled is the most accurate liquid-in-glass thermometer, the transportation, use, and disposal has made it obsolete for ordinary usage. •Mercury is a hazardous substance, and carries the risk of human exposure, hazardous material spills, and fiduciary...

27. NIST •NIST –National Institute of Standards and Technology •Certified reference thermometer •Platinum Resistance thermometer 28. Where Can I Purchase a Quality Thermometer ? •Amazon (Full Store Directory) –Automotive & Industrial •Lab & Scientific –or- Industrial & Scientific –Test...

25. Ice-Point Calibration Dial Follow instructions for LIG calibration. In the back of the dial, locate the small nut. Use a small wrench to adjust the needle to 0 or 32 respectively. Return to ice bath. Repeat until the needle is stable at ice-point temperature. Replace ice and water if...

23. Trivia •Avoid using infrared instruments unless you are planning on measuring the outside surface temp of a giant boiler. 24. Ice-Point Calibration LIG & Digital Ice-point is 32 F°, or 0 C°. Fill a small Styrofoam cup with crushed ice. Wear gloves (body salt and oils will interfere)...

21. Interferences •Vibration causes friction and/or turbulence which will change the temperature. –Do not stir during measurment. •Physical damage to the thermometer will create inaccurate measurements. –Replace all damaged equipment. •Temperature variations may come from body heat...

19. Procedure •STEP 4: DOCUMENTATION –Read the measured result Add any correction factor. –Record the adjusted result and unit. •Farenheit, Celcius. Tweakers: For troubleshooting purposes document abnormal conditions such extreme high or lows. 20. Calibration •A thermometer may need to...

17. Procedure •STEP 2: IMMERSION –Digital and Dial: •1 inch is the standard depth, but several inches is acceptable. –LIG: •Either immerse to the depth indicator line, or within 1 inch of expected reading, or within 1 increment of the expected reading. 18...

15. Units of Measurement –Fahrenheit in °F, measures water freezing at 32 °F, and boiling at 212 °F –Celsius in °C, measures water freezing at 0°C and boiling at 100°C. Conversion Factor °C x 9/5 + 32 = °F (°F - 32) x 5/9 = °C 16. Procedure •STEP 1: PREPARATION – Equipment...

13. Where Should Thermometer be placed? To Nutrient and Water Solutions –The point of use is where the fluid temperature is the most stable (you’ll have to test different areas). – –Avoid touching the sides or bottom of container. – –Adhere to the fluid’s natural level to determine immersion...

11. Where Should Thermometer be placed? To Measure Reservoirs –The point of use is where the fluid temperature is the most stable (you’ll have to test different areas). –Avoid corners, outside walls, or intake/outake or high/low water level areas. Avoid the root ball if possible. –Adhere to...

9. Where Should Thermometer be placed? To Measure Ambient Air •Measured at the point-of-use. –Near or at the top of the canopy, near fruits, flowers, or new growth. –Anywhere ambient heat may accumulate, to evaluate removal, or modification. –Do not place apparatus near walls, floor, or roof of...

7. Choosing the Range •Choose LIG and dial thermometers that specify an approximate range of 50 – 200 F° •Digital thermometers may have a wider range and still be accurate and precise. •Tweakers: Don’t use a drugstore ‘people’ thermometer to take a...

5. Equipment •Digital –RTD (Resistive Thermal Device) internal workings above average. •Liquid in Glass (LIG) –Alcohol-filled Fahrenheit or Celsius w/ 1° subdivisions –Metal casings (shown) •Dial (not shown) •NIST or NBS Standard thermometer is best because it is factory calibrated and...

3. Application •Temperature is one of the most measured parameters in the indoor garden. •Following a defined schedule of measurement, and documenting readings is preferred. •Liquid thermometers have been surpassed by digital detectors for some modern uses, however...

:idea: This is for gardeners and growers that wish to utilize the best options for monitoring and troubleshooting the conditions in their grow area. Beginner and Intermediate level instruction and advice. So if you like minutia, this may be for you. 1. Temperature Measurement for Home...

Now that is a really pretty girl. Nice flower structure.

[/FONT][/COLOR][/B][/FONT] [/LIST] [/FONT][/COLOR] Aahhaaaaa! We shall see. LOL Anywhoo, I hope my pending garden upgrade will produce buds as nice as you guys. Bud candy ! !

So this is what Critical+ is supposed to look like? Gorgeous, man. Props! For sure.

Yeh, I think you're right. I may have been thinking of the 'canoe claw', where the whole leaf folds down the middle AND curls under at the tip. Regular claw is usually Nitrogen toxicity. It's hard to get a handle on it till you know your strains back and forth, and gain some (years) of growing...

I added a link here for you since it appears that you are on city water/tap water. Hope it works. 5 day sit time for chlorine and chloramines. Settling is good if you can filter, or decant off the cleaner water. With the hard water we have here, freezing it creates a flocculant that settles to...