Xylem iRIS 150 GPRS DATALOGGERS - Manual (Page 22)

iRIS 150 V1.11 User Guide - 16
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Option 6
When this option is selected you will be prompted to enter a logging multiplier to convert from engineering
units to an integer value to storage in the logging memory.
> Log Multiplier=
For example, if you need to log a measurement that is accurate to two decimal places you will need to enter
a logging multiplier of 100.
Option 7
When this option is selected you will be prompted to enter a logging rate (in minutes) for the sensor.
> Log Rate=
If you wish to log digital data on change of state you can enter a value of 0. If this parameter is left at 0 for
analogue sources, they will not be logged. The dc power change of state ignores this parameter, so it is
typically set to zero for this source as well.
Option 8
Select this option to display the Alarm Configuration menu for the sensor.
Option 9
Select this information to view the logged data for the sensor. You will be prompted to enter the number of
samples you would like returned. Note this option is not intended as a proper download function, but simply
as a method of viewing a small number of recent samples.
5.3.4 Alarm Selection (Level 4)
Use the Alarm Selection menu to decide which of the two alarms you want to configure. You can see at a
glance from this menu which alarms are enabled.
* Alarm Selection
0 Exit
1 Alarm #1 (Enabled)
2 Alarm #2 (Disabled)
>
Option 0
Select this option to return to the Sensor Cfg menu.
Option 1
Select this option to view the set-up menu for Alarm 1.
Option 2
Select this option to view the set-up menu for Alarm 2.
IMPORTANT NOTE: Care needs to be taken in the selection of an appropriate logging multiplier
because the iRIS stores data as signed 16-bit integer values (range from -32768 to 32767). This
means that the maximum scaled value multiplied by the logging multiplier must not exceed
32767. If it does, the values will limit at that point and data will be lost.