Description:
Applications
The DL220 data logger allows automated data communication for stations without electrical or telephone connections
Brief information
Installation
The installation of the data logger in the station is limited to connecting the impulse line of the transmitter unit (gas meter, volume corrector or other measuring instrument with a low-frequency pulse output). The reception fi eld strength of the internal GSM/ GPRS modem can be checked on the unit’s display. Thus, commissioning is possible without any special tools.
Operation
The current values and parameters can be shown on the display and changed if required. The use of arrow keys guarantees simple operation of data arranged in lists. Each value is displayed with a clear description and the relevant unit.
Archiving
The meter readings are stored in an event-oriented manner. In this, the meter readings are archived with a time stamp during the given metering period and in the case of events (e.g. when a set limit value is exceeded). Each recorded meter reading and consumption value can be shown on the display of the data logger. Thus the data used for invoicing can be checked on site by the customer at any time and without additional resources.
Data communication
The provision of data communication for stations without electricity supplies or telephone connections is the main feature of the unit. The GSM/GPRS radio data modem needed for this is completely integrated in the unit. Data transmission can be carried out in both PUSH and PULL mode. In PUSH mode, the modem sends data autonomously by text message or as an ASCII fi le using the FTP protocol (ComFTP application). Thus, the amount of data to be transferred, as well as the cycle can be freely configured. For this purpose, the modem is activated and is then switched off after the data has been transferred.
For PULL mode, in order to optimize the service life of the battery, the modem is activated within a programmable, cyclical time window for calling up the data. If the data logger is used without a modem (optional), then the optical interface is used for reading out the archived data.
Parameterisation
The program WinPADS is available with its associated connection cable for easy parameterisation and reading out.
Power supply
In the DL220, a battery is used for supplying the data logger (for metering and archiving) and an independent battery is used for operating the GSM/GPRS modem. The separate energy supply guarantees the function of the data logger at all times, with or without modem operation. The DL220 battery ensures a service life of at least 8 years. The service life of the battery for operating the GSM/GPRS modem is dependent on the mode of operation, the data transmission itself and the reception field strength at the metering point. Configuration examples and the resultant battery service life can be found in the table overleaf. The use of a second battery (optional) for data communication means that the battery service life can be doubled.
Options
- Second battery for GSM/GPRS modem
- Data logger without GSM/GPRS modem
