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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)
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
γ
R
For example, if the insertion type density meter, 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
=(5×10)×1.8
=0.9
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 saying "Test output will be valid."
Make sure that there is no problem and then press [→] to get into the setting mode. To get
into [2: SETTING MENU], it is necessary to further enter the password "8000". Then, the
output will be switched to the simulated output that is set beforehand.
Item
(a)
Multiplier
0.084
0
: Standard value of electric conductivity correction factor (see Table 9.1)
0
: Upper range of conductivity meter used
0
γ (Standard Value)
1.8
87
6 F 8 A 0 7 8 7
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