K-Patents PR-23 - Manual (Page 53)

6 Configuration and calibration 45
1 NOT DEFINED Factory setting
2 HOLD When used with a built-in wash relay, this function is
useful for an intermittent process: the prism is washed
when the process stops (as indicated by contact clo-
sure).The wash is repeated when the process restarts
(if the stop lasts over 60 seconds). The signal is on hold
between washes.When used with an external indepen-
dent timer, contact closure holds the output signal.
3 WASH STOP Switch closure prevents wash cycle. It can be used to
prevent wash action when the process pipe is empty.
The message
WASH STOP will appear when a wash cycle
is initiated.
4 REMOTE WASH At switch closure the system waits for an external wash
command before initiating wash.
5 SCALE SELECT Any chemical curve and associated field calibration
scale can be selected by switch closure. The scales as-
signed to each switch independently.
6 CALIBRATION SEAL Contact closure prevents access to calibration and con-
figuration ("external password"). Can be used to seal
the calibration.
7. If you chose Scale select as switch function, return to the Switch menu (if not re-
turned automatically) and choose 3 SCALE CHEMICAL to enter the parameters for the
chemical curve assigned to the switch. See Section 6.6.1 for more information on
chemical curves and chemical curve parameters.
8. If necessary, the chemical curve assigned to a switch can be adjusted by field cal-
ibration parameters. Select 4 SCALE FIELD in the Switch menu to enter the parame-
ters.See Section 6.6.3 for more information on field calibration and field calibra-
tion parameters.
6.5 Configuring refractometer system
The Indicating transmitter has two built-in 4–20 mA outputs ( mA OUTPUT 1, mA OUTPUT 2 ),
two relay contact outputs ( RELAY 1, RELAY 2 ), and four switch inputs ( SWITCH 1,
SWITCH 2, SWITCH 3, SWITCH 4 ). Each of these resources can be freely assigned to either sen-
sor A or sensor B.
6.5.1 Configuring mA outputs
For the electrical properties of the two output signals, see Section 3.3.3, “Connecting
the Indicating transmitter”.
− First select
5 CALIBRATION in the Main menu and enter password if necessary. Then
select 2 OUTPUTS in the Calibration menu. In the Outputs menu, select 5 mA OUTPUTS .
− Select the mA output, 1 or 2, to get to the Output menu (Figure 6.10 below) where
the output can be configured.