Hach Orbisphere 51 Series, User Manual

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Inputs/Outputs Menu
9.1 Configure snooze
9.2 View inputs/outputs
9.3 Relays
Configure snooze
In the event of an alarm, the “snooze” button stops the instrument buzzer and returns all the relays in the
instrument to their normal state during a "snooze time".
Enter the snooze time in seconds and press
OK .
View inputs/outputs
For each channel, this view option displays the state of the 3 alarm relays (on or off), and the analog
output current (or voltage, depending on the instrument version) value for each.
Relays
There are three measurement alarm relays per channel and one system alarm relay for the instrument.
These relays are configurable as either standard or custom events through the instrument menu.
• An alarm relay can be activated or deactivated
• When the alarm is OFF, it is activated,
• When the alarm is ON, it is deactivated
All the relays are activated as soon as the instrument is ON (but alarms are OFF). When the instrument
is OFF, the relays are deactivated, thus in this state, all alarms are ON. The logic "Relay deactivated =
Alarm ON" has been chosen for this safety reason.
When the main board does not communicate with the measurement board for more than 30 seconds, the
measurement board switches all the alarm relays and the analog output to the alarm state.
Relays configuration The three relays (per channel) can be triggered by several standard events,
or a combination of events (custom). The relays output can be used to turn
on a beacon, horn or PLC . Refer to
Connections to electronic boards on
page 30 .
Note: Relays can be set to Normally Open [NO] or Normally Closed [NC] by
changing the jumper positions on the measurement board. Refer to
Measurement alarm relays on page 32 .
• Select a standard event in the rolling list
• If “Custom event” has been selected, it has to be configured by touching
the
configure button
• Press on the text box to open the selection menu (rolling menu). Select
the events that must trigger the relay, and press
OK .
Proceed in the same manner for other events that should trigger the relay.
Test channel relays The three measurement alarm relays can be manually activated for testing
purposes:
• Select Relay On , Off or Not under test .
See note regarding the relays below. “Not under test” means the relay is in
operating mode, and it will be triggered normally.
Note: A relay set to NO will close when activated ( On ), but a relay set to NC
will open. Refer to Measurement alarm relays on page 32 .
Test system relay Similarly, the system alarm relay can be manually activated for testing
purpose.
• Select Relay On , Off or Not under test .
Note: In both the Test Channel Relays and Test System Relay options above, once the tests have been
completed press Cancel to exit the screen. At the same time, this will reset all relays (including the system
relay) back to a status of “Not under test”.