64
65
Temperature
From the
Temperature
menu the user can choose the
Temperature Source
and
Units
, as well as the
Temperature
Compensation mode
,
Reference Temperature
and
Compensation Coefficient
.
Temperature Source
To set the
temperature source:
Note:
The
HI 76312
sensor has an integral temperature sensor and will provide the best conductivity
measurement. Channel 2 should be selected to utilize the integrated temperature sensor.
• Press
while in
Conductivity
mode.
• Press
.
• Use
or
to highlight the
Temperature
option.
• Press
and then use
or
to highlight
the
Temperature Source
option.
• Press
and then use
or
to select
Manual
,
Channel 1
or
Channel 2
temperature source.
• Press
to confirm your selection or press
to
cancel operation.
Temperature Compensation
The user can choose from the following options:
Linear -
the meter will automatically compensate the conductivity using the following formula:
where:
C
ref
- conductivity at reference temperature
C
I
- conductivity at temperature of measurement
α
- compensation coefficient
T
I
- temperature in °C
T
ref
- reference temperature
Non-Linear -
recommended for measuring the conductivity of the natural water in accordance with the ISO-788-
1985. It provides compensation in the range of 60 to 1000 µS/cm over a temperature range of
0 - 35 °C.
Disabled -
the meter will display the Absolute conductivity with no temperature compensation.
C
ref
=
C
I
1 +
α
(
T
I
-
T
ref
)
100
• Press
.
A list with all customized profiles will be displayed on the screen.
• Use
or
to select the desired profile and press
to
confirm or
to exit without
selecting.
Delete Profile
To delete one of the existing profiles:
• Press
while in
Conductivity
mode.
• Press
.
• Use
or
to highlight the
Profile
option.
• Press
and then use
or
to highlight
the
Delete Profile
option.
• Press
.
A list with all customised profiles will appear on
the screen.
• Use
or
to select the desired profile and press
.
• Press
to return to the previous menu.
Reading Mode
This option allows the user to select between
Direct, Direct/AutoHold or Direct/USP
conductivity reading modes.
Note:
All three selections permit conductivity to be changed to resistivity, TDS and salinity via the
key.
To set the reading mode:
• Press
while in
Conductivity
mode.
• Press
.
• Use
or
to highlight the
Reading Mode
option.
• Press
and then use
or
to highlight
the desired option.
• Press
to confirm your selection or press
to
cancel operation.
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