The PH-meter do I clean afterwards with distilled water and dry the sensor gently with a paper towel.
Calibrate with pH buffer powder pH 4.00 and pH 6.86 (€ 0.64) and measure any manually Litmus paper strips (litmus test for color) 80st. € 0.35.
For the TDS value to convert to EC value in mS / cm, I share the ppm value by a factor of 640:
Testmeting 19-6-'15:
Temp ℃
|
pH
|
TDS ppm
|
EC mS/cm
| |
| Distilled water |
22,7
|
7,1
|
43
|
0,07
|
| Tap water |
21,7
|
7,9
|
140
|
0,22
|
| Tap water + nutrition |
21,5
|
7,1
|
900
|
1,40
|
| Rain water |
20,2
|
7,2
|
48
|
0,08
|
| Rain + nutrition |
20,2
|
6,8
|
690
|
1,08
|
Temperature correction:
Distilled water: 20℃ - pH 7,08
Distilled water: 25℃ - pH 7,00
The ideal pH for plants is from 5.8 to 6.5. Making more acidic may best with natural vinegar (or nitric N). If the plants in blooming with phosphoric acid P (PH-min Canna Bloom), you only need a little.
 |
| Soil PH-Moisture-Light tester $3.30 |
No comments:
Post a Comment