Revision 1
STT700 Series HART/DE Option User’s Manual
Page 89
7.3.2 Correcting the High Calibration Point
Assuming that you have just finished the S 1 / 2 cal Lo correct, select the My Device menu to proceed
further.
1.
Select the My Device menu, and choose one of the following options:
a.
Device Setup \ Advanced Configuration\Calibration \ Calibration Methods \
Sensor (1 or 2) Cal Hi Correct
2.
You will be prompted to remove the loop from automatic control. After removing the loop
from automatic control, press OK.
3.
When prompted, adjust the temperature source to apply value equal to the Upper Calibration
Point, and press OK.
4.
When the temperature stabilizes, wait for 5 seconds, then press OK.
5.
When prompted, remove temperature.
6.
On the next prompt – “Please enter Calibration Date in MM/DD/YYYY format. Enter the
Calibration date (for example “05/27/2009”) and press Enter.
7.
On the next prompt - "Please enter the current calibration time in 24 Hr format (Hours Field)",
enter the Hours field HH (for example, "12"), and press ENTER
8.
On the next prompt – “Please enter current Calibration Time (Minute field),” enter the
Minutes field MM (example “23”), and press ENTER.
9.
When prompted to return the loop to automatic control, press ENTER
7.3.3 Resetting Calibration
STT700 SmartLine HART Temperature Transmitter can erase incorrect calibration data by
resetting the device back to
final factory calibration
, which is performed per the ordered range.
The Corrects Reset command returns the zero and span calibration factors to the original precise
factory calibration.
Incorrect or inaccurate user calibrations may be reset by performing a Reset Correct
operation. This calibration reset will return the device to
original factory calibration
accuracy
. Factory calibration is extremely accurate and user calibration is not typically
recommended. However, if user calibration to a customized range is desired, it is recommended
that the input calibration procedures be performed again after the calibration reset.
The following procedure is used to reset calibration data to factory calibrated range using a
communicator.
1.
Connect the MC Toolkit per Figure 7
across the loop wiring and turn on.
2.
Turn the MC Toolkit on, start the FDC application.
3.
On the FDC Home page, select Online, and establish communication with the transmitter.
4.
Select the My Device menu, and choose from the following selections:
5.
Device Setup \ Advanced Configuration\Calibration \ Calibration Methods \ Reset Corrects
(Sensor)
6.
You will be prompted to remove the loop from automatic control. After removing the loop
from automatic control, press OK.
7.
You will be notified that a Reset Corrects is about to occur. Press OK
8.
When the message “Reset Corrects OK” appears, press OK. The previous calibration
“Corrects” are removed and calibration is reset to the factory values.
9.
When prompted to return the loop to automatic control, press OK
