Hach si792 D series, User Manual

Page: 78 / 96

Calibration
76
4.
Press
CAL
, enter passcode:
1105
,
ENTER
to access the product
calibration once more. The display will briefly show CAL PRD and
then CALC.
5.
Edit the displayed value to match the value measured by the
laboratory or portable meter and press
ENTER
. The new slope and
zero point will be shown.
6.
Press
ENTER
to end the calibration. Return the sensor to the
process. The measured value will be shown in the display
alternately with Hold.
7.
Press
ENTER
to return to the measure mode.
Note: For comparison calibration via Foundation Fieldbus, see
section 6.2.4 on page 63 .
8.2 Temperature sensor adjustment
Complete the following steps to calibrate the temperature sensor.
1.
Press
CAL
, enter passcode: 1015,
ENTER
. CAL TMP will be
displayed for 3 seconds. The process temperature will be shown.
2.
Measure the process temperature with an external thermometer.
3.
Use the
UP ARROW
and
RIGHT ARROW
to enter the value of the
temperature from the external thermometer.
4.
Press
ENTER
to save the value.
5.
The transmitter remains in HoLD mode . Press
ENTER
again.
The transmitter remains in HoLD mode for approximately
20 seconds after calibration and returns to the measure mode.
Note: Repeat input of the process temperature value when “Err”
is displayed.