Fertilizers mineral

5 Infrared thermogravimetric method
Table 1 - Values of indicators of accuracy, repeatability and reproducibility of the IR TG method for determining the mass fraction of moisture
In percentages
Repeatability index (standard
deviation of repeatability) ar
0.40
Accuracy indicator (boundaries in
which the absolute
Over 0.5 to 2.0
0.20
Reproducibility index
(reproducibility standard
deviation) °R
Up to 0.50
0.30
0.10
1.20
0.30
0.15
0.03
0.6
0.09
0.07
0.02
brightness P = 0.95) ± A
measurement error with ver
St. 6.0 to 12.0
Measuring
range
Over 2.0 to 6.0
Obtaining the result of measuring the mass fraction of moisture with the characteristics of the error,
Development, certification and standardization of methods for measuring the mass fraction of moisture in a mine
5.3.1
The workplace when performing measurements of the mass fraction of moisture by the IR TG method must be
protected from air currents and vibrations; there should be no sources of magnetic fields near the workplace.
4.3
5.3 Requirements for an infrared thermogravimetric moisture meter
measurements) of the moisture meter used by IKTG.
GOST 8.613-2012
When performing measurements, the following conditions are observed:
- ambient air temperature - (20 ± 5) °ÿ, - relative air humidity
- (55 ± 25)%. Power supply parameters - in accordance with
the operating conditions (technical requirements
5.1.1 The IR TG method provides the results of measurements of the mass fraction of moisture in mineral fertilizers
and middlings in the measurement ranges and with absolute errors, the values of which are given in Table 1.
5.2 Measurement conditions
h
5.1 Measurement ranges and error characteristics of the results of measurements of the mass