16
Hardware
7.4
1-point temperature calibration
When the working range is limited to a certain more narrow range,
a calibration at one temperature point is sufficient.
•
In accordance with the working range, either the high or low
calibration point should be selected. (CP
≥
or < 45 degC /
113°F
)
•
This calibration causes an extra inaccuracy for the rest of the
working range.
•
The 1-point temperature calibration may be performed directly on
the circuit board or using the configuration software supplied. (for
more details, see Configuration Software, chapter 5.4 “1-point
temperature calibration”)
1-point temperature calibration procedure on the circuit board:
1.
Insert the sensor probe into the reference temperature
(calibration point) and stabilise for at least 20 minutes.
2. BUTTON S1
: Pressing the button for 5 seconds starts the
procedure for the calibration mode temperature. The calibration
mode is indicated by the lit LED "D1" on the circuit board
3. BUTTON S1
: Pressing the button for 5 seconds starts the
procedure. The calibration mode is indicated by the symbol
"CALIB HIGH" on the optional LC display (CP
≥
45 degC /
113°F
).
or
BUTTON S2
: Pressing the button for 5 seconds starts the pro-
cedure. The calibration mode is indicated by the symbol "CALIB
LOW" on the optional LC display (CP
<
45 degC /
113°F
).
4. BUTTON S1 (up)
and
S2 (down)
: Pressing one of the two
buttons will adjust the measuring value in steps of 0.1 degC up
or down to the reference value. The actual measuring value is
indicated on the display or can be measured with the analogue
output.
5. BUTTON S1 (store)
: Pressing the button for 5 seconds
stores the calibration value and the procedure is ended. LED
"D2" flashes to indicate exiting of the calibration mode and the
symbol "CALIB LOW" or "CALIB HIGH" will disappear from the
optional LC display.
BUTTON S2 (cancel)
: Pressing the button for 5 seconds the
calibration procedure will be ended without storing the
calibration values. LED "D2" flashes to indicate exiting of the
calibration mode and the symbol "CALIB LOW" or "CALIB
HIGH" will disappear from the optional LC display.
“CALIB HIGH”
“CALIB LOW”
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