Hach 900 MAX manual Alarm Relays Programming, Section, Trouble Conditions, Low Main Battery

Models: 900 MAX

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6.4.2 Alarm Relays Programming

Section 6

Figure 27 Single Relay Wiring Inside the Relay Junction Box

6.4.2 Alarm Relays Programming

Program alarms activate based on certain conditions (low battery, low memory, etc.). When an alarm is tripped, an action is initiated (report via modem, dial a pager, or set a relay). There are two types of alarms: Trouble Alarms and Set Point Alarms.

6.4.2.1 Trouble Alarms

Trouble Alarms initiate an action when a trouble condition occurs. For example, a relay may close when the memory is full. Refer to Troubleshooting and Error Messages on page 127 for more information on trouble alarms.

1.From the Main Menu, select SETUP > ADVANCED OPTIONS > ALARMS.

2.Select one of the trouble conditions.

3.Select an action to occur when the alarm is activated. The table below lists each Trouble Condition. Refer to Appendix C on page 127 for causes and solutions.

Trouble Conditions:

 

 

Low Main Battery

Memory Battery

Low Slate Memory

Slate Memory Full

Modem Failure

Missed Sample

Purge Failure

Jammed Distributor

RS485 Timed Out

Alarm Actions:

 

 

Set Relay #1

Set Relay #2

Set Relay #3

Set Relay #4

Report Via Modem

6.4.2.2 Set Point Alarms

Set Point Alarms look for trip points to be reached (either high or low or both) before initiating an action. For example an initiated action may be the closing of a relay when the water level exceeds 60 cm (24 in.) or drops below 10 cm (4 in.) Set Point Alarms activate when a user-definable high and/or low set point is reached.

 

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8990cm.fm

Alarm Relays

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Hach 900 MAX Alarm Relays Programming, Section, Trouble Conditions, Low Main Battery, Memory Battery, Low Slate Memory