Instructions

UM-0085-B09 DT80 Range User Manual Page 209
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 Data Usage
The amount of data transferred each month will depend on the number of channels sampled, and the frequency.
Assuming that all data logged by the DT80 is transferred to a single FTP server, then the volume of data transferred will
be approximately
equivalent to the volume of data logged. As discussed in How Much Data Can I Store?(P95), each time
a schedule executes it will store 10 bytes + 10 bytes per channel (that has logging enabled). So the approximate data
volume per month is given by:
data volume per month per schedule = samples per month x (10 + (10 x number of logged channels))
For example, the job
RA10S 1..5TK
RB1M REFT 2CV(W)=2CV+1
LOGON
would generate 360x24x30 x (10 + 10x5) + 60x24x30 x (10 + 10x1) = 17MB/month, or 20MB/ month allowing for some
communications overhead. (
Note: the 2CV channel doesn't count because it is a working channel and is not logged)
If you wish to configure/control the DT80 remotely using dEX then this will use significantly more data – up to
500MB/month.
It is recommended that you start with a plan with a generous data allowance (say 1GB/month) then monitor your usage
and reduce the plan if required, once you have a good idea of your actual data usage.
Note: A mobile plan's data allowance normally only applies when you are using the home network. While roaming, all data usage may
be charged at the "casual" rate, which will usually be much more expensive. It is important to choose a carrier that has good home
network coverage in the area in which the DT80 will be located.
 Settings
In order to connect to a mobile data network the correct Access Point Name (APN) is required. This is a special name
(e.g. telstra.extranet) which is specified by the mobile carrier and identifies the particular service or network to connect
to.
By default, the DT80 will attempt to automatically set the APN. This is done by reading the ID of the issuing mobile
carrier from the SIM and then looking up the APN from a fixed database.
This process is not foolproof, however. Your mobile plan may provide access via a different APN to the one in the
database, or the carrier may have changed it. For example, carriers sometimes provide different APNs for prepaid and
postpaid accounts.
In most cases, the APN is all you need, as the network can identify you from the SIM's internal ID number. However,
some carriers may also provide you with an account name and password. This is more common in cases where the SIM
is supplied by a third part integrator/reseller rather than directly from a mobile carrier.
If automatic configuration does not work for your SIM then the logger will need to be manually configured with the correct
APN (and the account name/password if required), as discussed in Configuring the Integrated Modem (P211).
Support for DT80 Network Features
 Basic DT80 Client Services
Any mobile plan which supports TCP/IP data connections will allow the DT80 to access the Internet. This means that the
DT80 will be able to:
• unload data to an FTP server
• read data from Modbus sensors via the Internet
• update its system time from an NTP server
• "ping" other computers, for diagnostic purposes
 Email
To send an email, an Internet-connected computer needs to send the message to an SMTP server (Simple Mail
transport Protocol). This server, and its brethren around the world, will then take care of delivering the message to the
specified email address.
Thus in order for the logger to be able to send data or alarm messages via email, it will need to know the name of a
suitable SMTP server.
Many mobile plans provide access to an SMTP server, so that you can send email from your mobile phone. If this is the
case then you need to determine from the mobile carrier the name of their SMTP server, and then specify it in the DT80
profile. In some cases you may also be given an email username and password, which will also need to be specified.
As with APNs, the DT80 contains a database of SMTP server names provided by various mobile carriers, which it will
match against the SIM's issuing carrier. Once again, it is not guaranteed that a valid server will be found.
If you require the DT80 to send email but your mobile plan does not provide access to an SMTP server then you will
need to set up an email account with a third-party provider. This provider will supply you with the SMTP server name, a
username and a password, which you will need to enter into the DT80's profile.