CL51 SW version 2.105 - CL51

Vaisala Ceilometer CL51 Release Notes
Product status
Document code
M213338EN
Revision
A
ft:locale
en-US
Product
CL51
Document type
Release notes

Released: November 2022

This document lists the features implemented in the CL51 firmware versions up to 2.105.

Version 2.105

Released 22-11-30.

  • Added parameter for selecting optics unit type (CLO511 or CLO521):
    • The parameter selects the overlap correction function used.
    • Set using command set factory opt_type.
    • Read using command get params factory (Opt. Type: CLO511/CLO521).
    • The default value is CLO511, so there is no need to set this parameter after updating the software of an older unit (having CLO511 and any older software).
    • Any older software versions do not work correctly with CLO521. If a CLE321 spare part board with older software is installed in a unit with CLO521, the software must be updated. There is no need to set the optics type parameter, as it is read from CLT EEPROM. A software update is enough.
  • Fix for software update on old boards with flash chip A29L008:
    • Since version 2.000, the software update did not work on older boards having the alternative flash chip Amic A29L008.
    • The software update worked already before this fix on boards with the new flash chip S29AL008J, and on boards with the original old flash chip AM29LV008B.
  • Optimize code to speed up report transmission.
    • Optimizing done to avoid unnecessary CPU load, which slowed down report transmission. The problem was that long reports could not be sent with the short intervals and low baud rates indicated in the manual.
    • The problem has been present since CL51 version 1.032, in which the secondary report was introduced.
    • Now all message type, message interval. and baud rate combinations listed in the manual are supported.
  • Name and uptime added to dump command.
  • Increase the tendency of CL51 to report vertical visibility in fog.
  • Blower self-test logic changed.
    • Changed to check the blower (out) temperature rise instead of difference to ambient (blower in) temperature. The logic is now as follows:
      1. Turn blower on and blower heater off.
      2. Wait 2 minutes for cooling down in case the heater has been on.
      3. Turn blower heater on.
      4. Wait 2 minutes for temperature to rise.
      5. Check that blower temperature has risen more than 4 °C.
    • Blower self-test not run if external temperature is above +40 °C.