Advertisement
７．Start up
7-1．Warm up operation
Dust Monitor requires warm up operation for about 1 hour after switch on.
7-2．Measure range set
After finishing warm up operation, you please set most appropriate measure range.
You please set the range at 1 - 4 if the condition in which normal flow speed is regular,
filter is correct and measure environment is appropriate.
In case requiring observation of smaller change, you please set the range at 5〜9 so
that you can observe smaller change.
(In case density is high however, you may get over range.）
4mA(0%) 20mA(100%) 4mA(0%) 20mA(100%)
Measure range １ ： 0.1 〜 1000mg/m
Measure range ２ ： 0.1 〜 500mg/m
Measure range ３ ： 0.1 〜 200mg/m
Measure range ４ ： 0.1 〜 100mg/m
Measure range ５ ： 0.1 〜 50mg/m
This range（density）, utilizing「Talc」as standard powder, is designed to get 20mA output
under an environment of flow speed of 10m/s and the maximum range of 1000mg/m
As to other ranges, the maximum value of 20mA of each range is designed to output due
to its output linear.
【Reference： Talc】
(Ｔaｌｃ) is non organic powder made from ore called Talc being crushed into
gray white particle and smooth powder.
Talc, with its chemical name： hydrous magnesium silicate (Mg3Si4O10(OH)) containing
main ingredient of SiO2 approx 60％, MgO approx 30％ and combined water of 4.88％.
As its physical nature, Talc of true specific gravity 2.7〜2.8 is a substance having
lowest hardness, superior in heat resistance in addition to chemically stable nature
among non organic mineral.
7-3．Integral set
Integration will even off measure signal per time fixed number up to maximum 30 seconds.
（optional set）
※ Trouble of filter system will indicate through sudden rise of output signal.
When doing analysis of filter system, set integral at 0 second, please.
By setting integral at 0 second, you can monitor sudden change of dust density.
As measure example, bag filter observation example is indicated for you in Fig.5
in which Dust Monitor is used for 13 lines.
Dust exhaust is indicating its respective amount to transact as 1〜6 lines, and 12，
13 lines are low but 7〜11 lines pretty high peak.
You can decide when you change filter based on your observation.
Density
of
dust
Filter No.
Warning
point
Fig.12. Filter observation picture (example)
3
Measure range６ ： 0.1 〜 20mg/m
3
Measure range７ ： 0.1 〜 10mg/m
3
Measure range８ ： 0.1 〜 5mg/m
3
Measure range９ ： 0.1 〜 2mg/m
3
Time
- 9 -
3
3
3
3
３
.
Advertisement
