Temperature Compensation - Hanna Instruments HI 504 Instruction Manual

TEMPERATURE COMPENSATION

If the setup item G.01 is set to "AtC" an automatic tempera-
ture compensation will be performed using the temperature
value acquired with the Pt100/Pt1000 input.
If the probe appears to be unconnected, or anyway it does
not give a valid temperature (temperature outside the -30 to
130°C range), the instrument will generate a broken tem-
perature probe error, which will be handled as stated in the
error configuration. In this case the temperature will be auto-
matically set to the setup item G.02 ("Manual or probe error
temperature") and the setup item G.01 will be automatically
set to "USEr" (see below).
After that, the Pt100/Pt1000 input continues to be monitored
to track the Pt100/Pt1000 error closing.
The setup item G.01 is automatically changed back to "AtC"
when the Pt100/Pt1000 error is closed.
During error condition, if the user decides to start working in
manual mode (and so manually close the error), he has to
go in setup menu (item G.01), change the value to "AtC"
(automatic compensation) without giving confirmation, then
change again to "USEr" and finally give confirmation by
pressing the CFM key.
If the setup item G.01 is set to "USEr" a manual temperature
compensation will be performed, no matter whether the tem-
perature probe is connected to the Pt100/Pt1000 input or
not.
The start value for temperature, when entered the manual
mode, is the one stored at G.02 ("Manual or probe error
temperature").
If the user wants to change the temperature value while in
manual mode, he has to press the æ or
the æ key it will add 0.1°C to the actual temperature value,
while pressing the
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key. Pressing once
key it will subtract 0.1°C.
For quickly changing the temperature value press and hold
down the æ (or ) key: the temperature will be incremented
(decremented) of 0.1°C until the total amount is 0.4°C, and
then the increment (decrement) will turn to 1°C.
During these operations both the temperature value displayed
and setup item G.02 are updated (the last one is updated
with a maximum delay of 10s).
Note
When the Digital Transmitter is used, the temperature com-
pensation is performed in the transmitter.
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