39
38
P8.0: Temperature Settings
P8.1 Selecting the temperature coefficient
The temperature coefficient is the amount of change in conductivity per degree of
temperature; it is expressed in percent per °C or °F. Entering the exact temperature
coefficient of your solution lets you accurately compensate temperature for almost
any solution*. You can adjust 0.0 to 10.0% per °C or °F. Meter default is 2.1% per
°C or °F.
From measurement mode
1.
Press the Mode key
to select
conductivity or TDS measurement
mode.
2.
Press Setup key
to enter
Set Up mode.
3.
Press the
▲
and
▼
keys
to scroll
through subgroups until you view
parameter P8.0.
See figure
4.
Press the ENTER key
to select
parameter 8.1. The display shows
“T.CO” on the upper display.
See figure
5.
Press the ENTER key again
.. The
upper display shows the temperature
coefficient and the lower display
shows “T.CO”.
See figure
6.
Press the
▲
and
▼
keys
to select
the temperature coefficient of your
solution.
7.
Press the ENTER key
to confirm
selection and to proceed to step 4 of
P.8.2. Press the CAL/MEAS key twice
to return to measurement mode.
A
A
B
B
C
C
6.9
Notes
* If you do not know the temperature coefficient of your solution you can determine
the correct value using the formula in Appendix 3 “Calculating Temperature
Coefficients” on page 49.
P7.4 Setting the TDS factor
As the concentration of dissolved salts in solution increases, the conductivity
increases. This relationship varies from salt to salt and is roughly linear over a
given range for a given salt. The TDS conversion factor is used by the meter to
convert conductivity to TDS. It is important to use the appropriate TDS factor
for accurate TDS values.
To determine the conductivity to TDS conversion factor for your solution:
• Appendix 1 on page 47 lists some commonly used conversion factors.
• Appendix 2 on page 48 describes how to calculate the TDS conversion factor
for other solutions.
You can set the TDS conversion factor between 0.4 and 1.0; meter default is 0.5.
From measurement mode
1.
Press the Mode key
to select
conductivity or TDS measurement
mode.
2.
Press Setup key
to enter
Set Up mode.
3.
Press the
▲
and
▼
keys
to scroll
through subgroups until you view
parameter P7.0.
See figure
4.
Press the ENTER key
five times to
select parameter 7.4. The upper
display shows “tdS” and the lower
display shows “P7.4”.
See figure
5.
Press the ENTER key again
. The
upper display shows a value and
the lower display shows “tdS”.
See figure
6.
Calculate the TDS factor of your
solution.
See Appendix 2 on page 48
for information on how to calculate
the TDS factor.
H
H
I
I
J
J
7.
Press the
▲
and
▼
keys
to select your calculated TDS conversion factor.
8.
Press the ENTER key
to confirm selection and to return to the subgroup menu.
Press the CAL/MEAS key to return to measurement mode.
