Extech Instruments 42275 - Manual (Page 10)

V7.1 1/08 10
Start Mode Setup
Datalogger Clock Setting
Click OK to set logger to PC system time.
Alarm
Setting
The default High Alarm temperature is 85 C
The default Low Alarm temperature is -40 C
The default High Alarm for Relative Humidity is 100%
The default Low Alarm Relative Humidity is 0%
Select the desired High value or Low value by scrolling up or down.
The ALM LED flashes:
a. If the measured Temperature is higher than the HI
Alarm setting or lower than the LO Alarm setting.
b. Every second while the data is transferring to the PC.
c. Once every datalogging interval. For example, if the
sampling rate is set to 3 seconds, the ALM LED will flash
every 3 seconds.