Data Logging, Partial Power Save | Optiquest iRIS 220, iRIS 320

11 - iRIS 220 / iRIS 320, V1.19 User Guide

Partial Power Save

With the power management mode set to partial save, the on-board LEDs are disabled but the internal wireless modem remains in the fully active state as with the no power save mode.

Full Power Save

When power management is set to full save mode, the internal LED’s are disabled and the internal wireless modem remains in a powered off state until a GPRS/CDMA-1X or CSD or SMS session is activated.

NOTE: While the modem is in this state, it is not possible to obtain signal strength measurements or interrogate the modem via the AT command set using the Modem Terminal mode.

Additional power management features that operate in all modes include:

∙Deactivation of RS232 driver ic when the DSR signal is not present.

∙Disabling the LCD and turning off the backlight after two minutes of no activity.

∙Ability to activate a GPRS/CDMA-1X session at scheduled times of day for pre-set period.

2.8.5 Data Logging

The iRIS supports the logging of data from six virtual sensors, plus a further three internal data sources (battery voltage, supply voltage and logger temperature). Each of the six virtual sensors can obtain information from one of the following data sources:

∙Analog Input 1

∙Analog Input 2

∙Analog Input 3

∙Analog Input 4

∙Pulse Counter attached to Digital Input 1

∙Pulse Counter attached to Digital Input 2

∙Simulated Pulse Counter enabled by Digital Input 1

∙Simulated Pulse Counter enabled by Digital Input 2

∙Frequency Counter attached to Digital Input 1

∙Frequency Counter attached to Digital Input 2

∙Up/down Counter attached to Digital Inputs 1 & 2

∙Received Signal Strength Indication (RSSI)

∙Internal Database Location (for data obtained via user script or communications link)

∙High-speed Serial Instrument (Unidata format)

∙SDI-12 serial channel

Each sensor can be set up to scale the raw data source into engineering units through the application of a multiplier and offset (slope and constant). The scaled value can be logged to non-volatile memory at rates between once per minute to once per hour or on event for pulse inputs. As all logged data is stored in integer format, a logging multiplier is applied to the scaled value to maintain resolution. See Section 4.3.9.

It is also possible to configure a sensor to also log minimum, maximum, standard deviation or a calculated flow rate (pulse source only) values. See the next section, Section 2.8.6 and also Section 4.3.9 for further details on configuring these extended logging features as part of the Sensor Cfg menus.