OPERATION MANUAL
Technical changes reserved
0141 0315-150 29.06.2016
Controller N321
2.3. Level 3 - Calibration Level
The controller is factory calibrated. The following parameters should be accessed only by experienced personnel.
To enter this cycle, the
key must be kept pressed for 4 seconds.
Don’t press the
and
keys if you are not sure of the calibration procedures. Just press the
key a few times until the
temperature measurement level is reached again.
Level
Function
PAS
Password: Enter the correct password to unlock write operations for the parameters in the following levels.
CAL
Calibration low: Offset value of the input. It adjusts the lower measurement range of the sensor.
CAH
Calibration High: Gain calibration. It adjusts the upper measurement range of the sensor.
CJL
Cold Junction Offset calibration: This parameter is available only for thermocouple.
FAC
Factory Calibration: Restores factory calibration parameters. Change from 0 to 1 to restore the calibration param
-
eters with factory values.
Prt
Protection: Defines the levels of parameters that will be password protected. See „Configuration
Protection“ for details.
PAC
Password Change: Allows changing the current password to a new one. Values from 1 to 999 are allowed.
Sn2
Serial number: First part of the controller electronic serial number.
Sn1
Serial number: Second part of the controller electronic serial number.
Sn0
Serial number: Third part of the controller electronic serial number.
3. Working with the Controller
The Controller N321 energizes the output relay such as to maintain the process temperature on the setpoint value
defined by the user. The output status led P1 signals when the control output is on.
3.1. Configuration Protection
A protection system to avoid unwanted changes to the controller parameters is implemented. The level of protection can be
selected from partial to full. The following parameters are part of the protection system:
Pas
: When this parameter is presented, the correct password should be entered to allow changes of parameters in the
following levels.
Prt
: Defines the level of parameters that will be password protected:
1.
Only calibration level is protected (factory configuration);
2.
Calibration and Configuration levels are protected;
3.
All levels are protected: Calibration, configuration and setpoints.
PAC
: Parameter to define a new password. The password is located in the calibration level, and can only be changed by
a user that knows the current password. Valid passwords are in the range 1 to 999.
B+B Thermo-Technik GmbH | Heinrich-Hertz-Str. 4 | D-78166 Donaueschingen
Fon +49 771 83160 | Fax +49 771 831650 | [email protected] | bb-sensors.com
7 / 9
