Doric Instruments 5000D Digital Process Indicator and Miniature Datalogger - Manual (Page 18)

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select AUTO. The scan rate is selectable in one-second
increments between 5 and 20 seconds. The display readout
will then sequentially show the temperature of the active
channels. Any number of channels may be selected for
scanning.
If an alarm limit is exceeded on any displayed
channel, the display will flash, and the relay contact will
latch. The relay will remain latched until the alarm condition
clears. In scanning mode the display will flash on the alarm
channel as it scans.
By using the Doric Series 5000 Viewer, the Series
5000 can log and send multiple channel data through the
serial port making it a miniature datalogger.
Dual Alarm
The alarm card has two 5 amp/115VAC relays for high, low
or deviation setpoints. The alarm card is available by itself or
with analog output (either voltage or current). Relay setpoints
are programmed through the front panel menu or via the
serial port. An alarm limit may be disabled within the alarm
menu by selecting OFF at the first menu prompt. If OFF is
selected the display will return to the next main menu item
for further programming. If ON is selected the menu proceeds
down through the alarm menu for further setpoint
programming.
The relays can be operated in MAN or AUTO mode.
In AUTO mode, the relay unlatches by itself once the alarm
limit is no longer exceeded.
In MAN mode the relay is reset manually. However,
the display continues to flash until the alarm limit is no
longer exceeded.