Setra System Model 370 - Manual (Page 15)

3.6 SETTING AND USING ALARM SETPOINTS
The Model 370 has an alarm capability which will indicate when the pressure
applied has exceeded a high or a low setpoint. The annunciators are an
audible tone, a display message of "HI ALARM", and a message sent
through the communications port.
To examine the current value of the setpoints, press SETPOINTS. The
gauge will display "HI ALARM" and the high setpoint for about three
seconds, then will display "LO ALARM" and the low setpoint for about
three seconds, and then will revert to normal display.
To enter new setpoints, convert to the engineering units you wish to use,
and decide what values you will enter in the following procedure. Entering
a value which is too high or too low will cause the display to read "UnAbLE".
If this happens, press CLEAR to resume normal display mode.
1. Press SETUP, then SETPOINTS. The display will show "HI
ALARM" and the current high setpoint.
2. Now you can enter a new high setpoint by entering a number. To
keep the current setpoint without changing it, proceed to the next
step without entering a new number.
3. Press SETUP. The Model 370 will accept the number in the display
as the high setpoint, and immediately show "LO ALARM" and the
low setpoint.
4. Enter a new low setpoint, or to keep the current low setpoint, proceed
to the next step without entering a number.
5. Press SETUP. The number in the display will be accepted as the
low setpoint, and the gauge will revert to its normal display.
The factory setting for the high setpoint is 105% of the pressure range,
and the low setpoint is 5% below the pressure range. To effectively disable
the alarm setpoints, reset them to these values using the above procedure for
entering setpoints.
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