ppm meter question

Jumpin

Jumpin

Active Member
I have a TDS-3 meter and am not sure how to read it. It states it reads from 0-9999ppm however on the screen I am getting a reading of 124. Does this mean its really 1240ppm or actually 124ppm?
 
match box

match box

Well-Known Member
I don't know that meter but I would think it's 124. Thats what my meter would and your should be the same.
 
Jumpin

Jumpin

Active Member
That could explain why my plant looks like hell. I need to add a lot more nutrients to her res. Thanks
 
N

Newbt

Member
mine actually shows the 3 digit number and if ppm goes into the 1000's it has a x10 blinking on the side, not sure if yours is the same but wouldn't want you to up your nutes and fry the plants before checking.
 
(818)MedicineMan

(818)MedicineMan

New Member
Jumpin said:
I have a TDS-3 meter and am not sure how to read it. It states it reads from 0-9999ppm however on the screen I am getting a reading of 124. Does this mean its really 1240ppm or actually 124ppm?
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The TDS-3 website shows it reads 0 - 9999 PPM. I am inclined to believe it is a four digit readout. A simple test would be to mix a small batch of nutes strong enough to get a readout over three digits and see for yourself. You can then further dilute your mix unitl you are at the right PPM.
 
thatreedocta

thatreedocta

Active Member
(818)MedicineMan said:
The TDS-3 website shows it reads 0 - 9999 PPM. I am inclined to believe it is a four digit readout. A simple test would be to mix a small batch of nutes strong enough to get a readout over three digits and see for yourself. You can then further dilute your mix unitl you are at the right PPM.
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I agree. To check, measure distilled water (0 ppm), then tap water (around 250 ppm depending on area), and then a small glass of straight nutrients or ph up/down solution (high ppm in the thousands). By the way, im pretty sure yours means 124 and not 1240. Especially because i've never heard of a ppm meter/pen rounding instead of giving an exact measurement.
 
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