Calibration by comparison/grab sample
The sensor can be calibrated by measuring the process water with a portable instrument or
taking a grab sample and measuring the value in the lab (one-point calibration). The sensor
does not need to be removed from the process during calibration. The sample temperature
should correspond to the measured process temperature for accurate results.
Note:
The calibration by comparison option is not available when the range and units are set
to 000.0%.
1.
Press
CAL
, enter passcode:
1105
,
ENTER
. The display will show CAL PRD and then StorE.
2.
Measure the process water with a portable instrument or collect a grab sample for mea-
surement in the lab. Press
ENTER
to proceed.
The cal mode indicator will flash to indicate that calibration has not been completed. The
transmitter will continue to measure and display the current sample values.
3.
Measure the grab sample with a laboratory or portable meter.
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 display will show the new cell constant.
6.
Press
ENTER
to end the calibration. The display will alternate between the measured value
and Hold.
Press
ENTER
to return to the measuring mode. The outputs will remain in the hold mode for
approximately 20 seconds.
Note:
For comparison calibration via Foundation Fieldbus, see the User Manual.
Table 1 Default passcode settings
Display
Function
Default setting
Cal INFO
Calibration information
0000
CAL 0-CAL
Calibration zero
1001
CAL CELL
Calibration—cell factor adjustment
1100
CAL SOL
Calibration with standard solution
0110
1
CAL PROD
Product calibration
1105
1
CAL RTD
Temperature sensor adjustment
1015
CFG ERR
Error information
0000
CFG CONF
Configuration mode
1200
CFG SNSR MO
Sensor monitor
2222
CFG OUT
Current source
5555
CFG SPCL ST
Administrator passcode. Use
ARROW
keys to
select NO or YES
1989
NO SPCL ST
Do not change
administrator
passcode
Press
ENTER
to return to the default
Press
CONF
to exit the editor
YES SPCL ST
Change administrator
passcode
Press
ENTER
to accept the new passcode
Press
CONF
to exit the editor
1
Not available with si792x E/T-PA
