Casella CEL Sensus data logger unit - Manual (Page 42)

The condition of alarm can then be tied into further processing.
Modem where each channel can initiate a dial-out via an attached
modem, each time the alarm becomes true.
Communication Channels:
The unit has the following communication options:
RS-232 (2 channels)
Instrument interface (1 off)
Command interface (1 off)
RS-485 (1 channel) Command interface
13.2 Display and Keypad
2 line x 20 alpha-numeric display, allows status readout, operated
via 4 button keypad.
Only certain controller aspects of the unit can be interrogated via
this interface. The unit cannot be programmed from the keypad.
13.3 General
On-board clock-calendar with accuracy better than 1 minute per
month.
Code upgrade-in-the-field via RS-232 based ‘Flash memory interface’.
Operating Temperature -25 to 70 o C, non condensing.
Current consumption 21 mA (normal), 5.5 mA (standby).
In-built solar panel regulator and lead-acid battery charger; requires
panel and battery.
Transient suppression and EMC filtering included.
Remote access menu interface for user interaction/configuration.
Remote access command line interface for rapid (automatic)
configuration
Integrated Sensors:
The logger has provision to measure both temperature and
barometric pressure from sensors integrated on to the main PCB.
Remote Control
IrDA port for future developments.
RS 485 instrument network (up to 5 km).
Logging Capacity - Internal
512 kB of Flash storage
Capacity
(kB)
Number of
channels
Interval
(Minutes)
Data sets Duration
512 7 1 14980 10 days
512 7 60 14980 624 days
512 24 60 5090 212 days
Specification
Page 42 of 44
SENSUS Digital Data Logger -
Users Handbook