Logger Alarms - ACR Electronics SmartReader Plus Reference Manual

1.2.1.3

Logger Alarms

Alarms are used to indicate when any reading has exceeded preset alarm thresholds. When
an alarm condition occurs, the logger dials the stored number, typically for a phone or a pager,
and leaves the remote site's phone number as a message. As such, alarms are very useful
for monitoring loggers installed at remote locations. Note that alarms must be enabled for
each channel
Alarm Dialout. See the TrendReader guide for information on how to set up a modem at a
remote site.
If the remote logger will be dialing a telephone number, the receiving telephone will need to
have caller ID in order to display the remote site's number since a voice message is not left.
When you see that the remote site has called, you can call the site to find out which logger
caused the alarm.
If the remote logger will be dialing a pager, you can include a code, such as the logger's serial
number, along with the phone number. This helps to identify which logger initiated the alarm
call. However, in order to be able to do this, you must choose a pager system that accepts
touch-tone codes that can be displayed on the pager. Since there can be many loggers on a
network, being able to identify the logger that initiated the alarm can save quite a bit of time.
To respond to an alarm, you first need to dial into the site and back up the logger. Next, fix the
problem that caused the alarm. Finally, reactivate the alarm by clearing the logger. As a
precaution, you should regularly test the alarm system to ensure that if an alarm is triggered,
the logger will dial the correct phone number.
To prevent false dialing, there is a delay after the logger is setup before alarms become
enabled. Note that alarms do not operate in the fast sampling mode. If you enable alarms,
fast sample mode is disabled. Alternatively, if you enable fast sampling, the alarms are
disabled.
The alarm parameters are discussed in the following sections. In order to set any of the alarm
parameters, alarms must first be enabled.
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that is monitored. Other than a modem, no special equipment is needed for
SmartReader Plus Data Logger
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