![Hydronix Hydro-View HV02 User Manual Download Page 62](http://html.mh-extra.com/html/hydronix/hydro-view-hv02/hydro-view-hv02_user-manual_2192338062.webp)
SENSOR CONNECTIONS – HYDRO-PROBE I
62
HYDRO-VIEW USER GUIDE
D0022
REV 1.06
A multiplexing method is used by the Hydro-View to determine the state of the two
external switches SW1 and SW2 and thus to determine which material calibration table to
use. These 'switches' may of course be 'outputs' from a control system; however, they
must be of the 'voltage-free' type for the scheme to operate correctly. The diagram above
shows the internal excitation supply being used, but an equivalent arrangement for
external excitation is possible.
The multiplexing sequence performed by the Hydro-View is as follows...
⇒
Close relay output on terminal 20 and open relay on terminal 21.
⇒
Read state of SW1 on terminal 15.
⇒
Open relay on terminal 20 and close relay on terminal 21.
⇒
Read state of SW2 on terminal 15.
⇒
Repeat from beginning as required.
The Hydro-View requires that the state of switches SW1 and SW2 remain stable for two
multiplexing cycles before it updates its internal values. To avoid excessive wear on the
Hydro-View relay contacts, this process takes about 5 seconds to complete and thus the
external control system should allow sufficient time for any changes of material to be
propagated to the Hydro-View.
The material table number corresponding to the states of switches SW1 and SW2 is given
by...
SW2
SW1
Material table
Open Open 1
Open Closed
2
Closed Open 3
Closed Closed 4
Summary of Contents for Hydro-View HV02
Page 20: ...20 HYDRO VIEW USER GUIDE D0022 REV 1 06 Notes ...
Page 30: ...MATERIAL IN USE 30 HYDRO VIEW USER GUIDE D0022 REV 1 06 Notes ...
Page 42: ...SUGGESTED WORKING VALUES 42 HYDRO VIEW USER GUIDE D0022 REV 1 06 Notes ...
Page 48: ......
Page 53: ...GROUPING CHANNELS HYDRO VIEW USER GUIDE D0022 REV 1 06 53 Figure 17 Four bin grouped system ...
Page 54: ...EXAMPLE A FOUR BIN GROUPED SYSTEM USING RS485 54 HYDRO VIEW USER GUIDE D0022 REV 1 06 Notes ...
Page 69: ...INSTALLATION HYDRO VIEW USER GUIDE D0022 REV 1 06 69 Notes ...
Page 70: ......
Page 82: ...82 HYDRO VIEW USER GUIDE D0022 REV 1 06 Notes ...