Xylem SDI-12 Data Logger iRIS 220, iRIS 320, iRIS 350, iRIS 150, iRIS 300 - Manual (Page 80)

iRIS Datalogger User Guide V1.50
74 iQuest (NZ) Ltd - PO Box 15169, Hamilton, New Zealand Tel: +64 7 857-0810 Fax: +64 7 857-0811 Email: [email protected]
12 Appendix B – iRIS 220 Specific Information
12.1 General Characteristics – iRIS 220
The iRIS 220 is supplied in a lightweight extruded aluminium enclosure finished in a resilient powder coating.
This enclosure provides mechanical strength and EMI shielding, and also enables easy mounting in a variety
of situations.
The iRIS 220 supports a maximum of six external sensors (1-6). Sources for these sensors may be chosen
from physical digital or analog inputs or virtual sources (via serial communication or internal calculations).
Each sensor has two associated alarms, each with separate trigger and reset levels. Each alarm also has a
duration, which is used to delay the alarm trigger for analog inputs and to determine the time over which
pulse input counters should be totalised (for rainfall etc).
Three additional sensors (7-9) are reserved for internal measurements (battery voltage, supply voltage and
logger temperature). Data from all enabled sensors are logged in a four word (8 byte) compressed format
which includes full date and time to fractions of a second.
Figure 15 - iRIS 220