YSI 6500 Environmental Process Monitor - Manual (Page 33)

System Setup Section 3
3.3.3 RELAYS
If you do not choose to use the 6500 Relay function, proceed to the next section, 3.3.4 4-20 mA
channel set-up.
Highlight the Relays option, press Enter and the following display will appear.
The Relays menu allows the user to set up the logic and levels for turning the four available
relays on and off. If a relay is active, it might trigger an alarm indicating a problem in the
stream. For example, if a relay were configured as described below to activate when the pH falls
below 7.00, the alarm (flashing light, buzzer, etc.) attached to the relay would be enabled as long
as the pH was below 7. If the pH returned above the set value, the alarm would again be
disabled.
To set up the relays, highlight the Configure Relays selection and press Enter to activate the
following display in which no relay activation has taken place.
Now highlight the “1” selection and press Enter to display the setup options.
First highlight the “Para:” selection and then press Enter to choose the parameter with which the
first relay will be associated from the displayed list. Highlight the desired parameter, in the
example shown below temperature in degrees Celsius, and press Enter. Then press Esc to return
to the above menu.
YSI Incorporated 6500 Environmental Process Monitor 29