Status Led; Larm 1 & A2/Ext Terminals - Microedge Instruments iLog Series User Manual

Reset of CPU will cause the data and clock losses. Please reconfigure the logger after the
recovery.
To reset the CPU, press and hold the activation button, the LED starts to blink in RED color
with interval of one second. After 10 seconds the LED starts quick blinking to indicate it will
reset the CPU. Release the button when you see this. Then plug the logger to USB port of PC,
Site View should show it under the USB comm Tab.

Status LED

iLog logger has an on-board LED used to indicate:
1. Sampling:
When the LED was enabled by SiteView, it will flash once in green when the logger is
sampling. The colour of the LED can be overridden by the following conditions:
2. Alarms:
The LED will flash amber when it samples if any channel alarms are enabled and are
triggered.
3. Low Battery:
The LED will flash in red when it samples if the logger detects a low battery level.
If you do not need the LED to indicate the status of operation you can disable it (via SiteView)
in order to increase the battery life.
Alarm1 & A2/EXT Terminals
Alarm1 and A2/EXT terminals internally connect to the on-board N-channel MOSFET
switches. They can be used to control an external power supply to turn on/off devices like lamp,
strobe light or siren, or coil relays. The maximum power the switches can supply is 200mA @
24VDC.
The internal schematics of the switches are as follows:
iLog Data Loggers User's Manual Page 26/63