26
Option
What it does
Unit Name
This is the name of the unit
– it should ideally uniquely identify it
Transmission reference time
This is the time of the day that it will synchronise and transmit using. The hours
should be entered in the 24 hour format. The unit may take up to 24 hours for the
transmit intervals to synchronise to this time.
Transmission interval
How often in minutes the unit will take readings and then transmit them. If set to
zero unit will transmit every day. If not evenly divisible into 24 then unit resets at
the time defined by the HH MM / variance part of this command. Unit will not
transmit if the user is working with the menu.
Transmission variance
The variance of the transmit time each day
– e.g. If this is set to 60, it will
randomly select a time + / - 30 minutes of each transmit hour and minute for
transmission. Must be less than the transmit interval
Sensor wake-up interval
How often in minutes the unit will power the sensors and take a reading.
Applies only to analogue inputs. Unit will not take regular readings if the user is
working with the menu. The readings will be compared to alarm thresholds and if
required will transmit them.
Temperature transmission
This dictates if the temperature is transmitted along with the data using either
GPRS or SMS
Antenna selection
You can choose between the internal antenna (default) and the use of an
external antenna, using the SMA connector.
Modem power scheme
The modem that is built in to the Metron uses additional power
– you can choose
how the modem is configured when the unit is not transmitting. There are five
options:
‘Power off between transmit events’ - modem will power down between transmit
intervals.
‘Always on (GPRS pollable when idle)’ - modem will idle between transmit
intervals and be pollable using GPRS. This should be used if GPRS
communications are used and polling is required.
‘Always on (SMS pollable when idle)’ - modem will idle between transmit
intervals and be pollable using SMS only. It should not be used if GPRS
communications are used and polling is required.
‘Transmit on power up’ - modem will idle between transmit intervals and be
pollable using SMS only, it also transmit upon power on.
‘modem will idle between transmit intervals and be pollable using GPRS, it will
also transmit upon power on.
Unit autodetects if internal battery is used and will default to
‘power off between
transmit eve
nts’ if this is the case to optimise battery life.
Read on wakeup
‘Go to pin screen when any button pressed’ – When a button is pressed to wake
the unit up, the PIN number will be displayed. Pressing left will not activate
anything.
‘Read sensors if left button pressed’ – After pressing a button to wake the unit
up, you can then use the left button to read each of the sensors individually. It
may be useful for allowing visibility of the reading without giving permission to
change settings in the menu.
Log readings every
If you wish to data log, you can use this feature. Every X sensor wakeups will
record a reading and store it in memory. The data will be sent upon the next
transmit.
Data Formatting
Dictates the formatting of SMS messages sent. If sending to a mobile phone, use
‘Human-readable text message’ otherwise use ‘Gateway’.
Input configuration