Toshiba Density (Consistency) Meter LQ500, Руководство по эксплуатации

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Table 10.4.1 Standard Values of Electric Conductivity Correction Factor (
γ
)
(Based on Electric Conductivity Meter with a Range of 0 to 10 mS/cm)
and Slope of the Line (a)
Meter size
(mm)
a
γ
(Standard value)
50 0.168 0.9
80 0.105 1.4
100 0.084 1.8
150 0.056 2.7
200 0.042 3.6
250 0.034 4.5
300 0.028 5.4
In the event of performing a electric conductivity correction on this density meter, it is a basic
principle to externally connect and use a conductivity meter with a range of 0 to 10 mS/cm. In the
event of using a conductivity meter of another range (0 - R mS/cm), obtain the conductivity
correction factor in accordance with the following formula.
γ
=(R/10)
×γ
0
γ
0
: Standard value of electric conductivity correction factor (see Table 9.1)
R: Upper range of conductivity meter used
For example, if the meter size is 150 mm, the standard value of the electric conductivity correction
factor of the density meter is 2.7 and a conductivity meter with a range of 0 to 5 mS/cm is
connected to this,
γ
= (R/10)
×γ
0
= (5
×
10)
×
2.7
= 1.35
is used as the correction factor.
[NOTE]
◆
In the event of implementing a electric conductivity correction, separately prepare a
electric conductivity meter and install it on a location where the conductivity can be
measured correctly (where the measurement object process is appropriate).
◆
The "standard values" of electric conductivity correction factors shown in Table 10.4.1
are criteria. It is necessary to use the linear relationship that exists between the
conductivity and the output to survey and determine the electric conductivity correction
factor in terms of each actual measured object fluid. See Subsection 10.4.2.
◆
In the event of not executing any electric conductivity correction, set the "electric
conductivity correction factor (
γ
)" to zero.
10.4.2 How to obtain and set a correction factor
Obtain and set a electric conductivity correction factor as appropriate to the applicable process in
accordance with the following procedure.
(1) To set the density multiplier to 1.000
(1-1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once
although this varies with the operation status) to return to the initial menu display.
Next, use the [
→
] key to move the LCD indicator cursor to the menu number "2" of
"2: SETTING MENU" and then press the [SET] key to display the warning message