Vaisala Hydromet Data Collection Platform - Manual (Page 24)

User's Guide ______________________________________________________________________
22 ___________________________________________________________________M210784EN-E
When long signal cables are needed, these will be equipped with
optional surge voltage protection devices. These surge protectors
consist of a combination of VDRs, gas-filled discharge tubes, transzorb
diodes, and coils, thus providing excellent protection. These DIN-rail
mountable devices are easy to change without any special tools.
The QML logger is equipped with a CF card slot for logging a large
amount of data. The data is logged into daily files making it easy to
locate any particular data set for further analysis. The QML logger
supports CF cards of up to 2 GB. These cards can be read directly in the
PC. Several different types of readers are commercially available:
internal PCMCIA reader as well as external readers to be connected to
USB or parallel port of a PC. You are recommended to only use cards
purchased from Vaisala that have been tested to function in harsh
environments.
1004-042 Figure 3 CompactFlash Memory Card Reader
Optional modules include, for example, various communication
modules and a built-in pressure transducer.
QML Logger Connector Block
The QML logger includes:
1. Ten measurement channels and one internal channel for pressure
measurement.
2. One connector block for power supplies.