36
NETAJET
™
4G
INSTALLATION MANUAL
DOSING CALIBRATION
Note the required dosing ratio of each fertilizer solution and the dosing ratio of the acid solution (if used).
Fill a bucket with 10 liters (2 US gallons) of the client's supply water (without fertilizer or acid).
Measure the EC and the pH levels of the water in the bucket using calibrated portable sensors.
EC
pH
Supply water (without fertilizer or acid) 0.3 7.8
Using a measuring tube or a syringe, take a dose from each fertilizer solution and from the acid solution (if
used) according to the proportions determined by the dosing ratio (see example below) and
mix thoroughly
with the water in the bucket.
10 liters
(2 US gal)
A
B
C
Acid
Metric units
For a fertilizer dosing ratio of 5 l/m
3
each
and an acid dosing ratio of 2 l/m
3
,
the quantities for 10 liters of water in the
bucket-simulation test will be
50 cc of each fertilizer solution and
20 cc of the acid solution
EXAMPLE
US units
For a fertilizer dosing ratio of 1.5 US gal/THG each
and an acid dosing ratio of 1.1 US gal/THG,
the quantities for 2 US gallons of water in the
bucket-simulation test will be
0.38 oz* of each fertilizer solution and
0.28 oz** of the acid solution
DEFINITIONS
1 US gal = 128 oz
* 1.5 X 2
1000
= 0.003 US gal = 0.384 oz
** 1.1 X 2
1000
= 0.0022 US gal = 0.28 oz
Measure the EC and the pH levels of the mixture in the bucket using calibrated portable sensors.
Compare the measured EC and pH values to the target values set by the agronomist/consultant.
EC
pH
After adding the fertilizers and acid
1.6
5.5
Target values
1.8
5.8
Deviation from target value
11% 5%
Target value
+30%
-30%
In range
GOOD!
Out of range
Out of range
EXAMPLE
EXAMPLE
