As well as recording data, EnviroMon can be
configured to sound an alarm if a parameter goes out of
range (high or low) or if a sensor fails.
There are four main alarms:
- The EL-008 logger contains a built-in
audible alarm - If the area where the logger is mounted
is continuously manned, the built-in alarm is sufficient
-
Remote audible alarms - Use with EL-005 logger to
provide an audible alarm, or anywhere on the network as
an additional alarm with the EL-008 logger
-
Telephone Autodialler - Use to send telephone
messages
- SMS text messages - When connect to a
GSM modem, the EL-005
logger can send text messages to a mobile phone.
The 65dB EL-006 remote alarm is useful
when the room where the logger is located is not often
occupied. One or more remote alarms can be connected at any
place along the network where staff would be able to hear
the audible alarm.
If it is necessary to respond to alarms
when the site is unmanned, the alarm dialer module can make
telephone calls to several numbers and deliver a voice
message.
The EL-019 autodialer can be programmed
with a list of emergency telephone numbers. When there is a
problem, the dialer calls each of the telephone numbers in
turn until someone answers, then it gives a message saying
that there is a problem. The dialer behaves in the same way
as any normal extension and does not affect the operation of
other telephones connected to the same line.
The EL-019 is only suitable for use with
UK phone systems. Overseas customers should contact their
local distributor for a suitable alternative.
Supplied with the autodialer is the EL-018
adapter. The EL-018 serves three purposes:
- it controls the dialer
- it provides power for the dialer and
for the system
- it can provide battery backup for
much longer periods than the logger's internal backup
The dialer adapter is supplied in a grey
plastic box with a clear lid. The box has a large hole each
side for cables. There is space for a 1.2AH battery inside
the box: this will provide backup for 12 to 24 hours,
depending on the configuration. Alternatively the unit can
be connected to a larger, 12V lead acid battery (for example
a car battery) outside the box: this could provide backup
for many days.
The Speech Dialer can give three messages
for different types of problem:
- temperature out of range or sensor
fail
- mains fail for more than five minutes
- network fail for more than five
minutes
Alarm Options
When the EnviroMon network is being set up
there are several alarm options that can be configured for
each sensor.
High and Low Threshold
Alarms can be enabled or disabled for each
sensor.
Enabled sensors can have both high and low thresholds.
It may be desirable to have an alarm on sensor failure, but
not if a parameter goes out of range. This can be done by
leaving the alarm enabled and setting a wide parameter
range.
Hold Off
If the parameter normally goes out of
range for short periods, it is possible to hold off (delay)
alarms for a specified period. For example, if a freezer
periodically goes through a defrost cycle lasting 15
minutes, an alarm holdoff of 20 minutes would prevent the
defrost cycle from causing alarms.
Disable
If it is necessary to keep the parameter
in range only during working hours, it is possible to
specify the time range and days of the week that the alarm
should be enabled. It is also possible to disable the alarm
during holiday periods.
The
EnviroMon network >
Home
