Vaisala FS11 - MITRAS Emulation; MITRAS Single Baseline

USER'S GUIDE ____________________________________________________________________
82 ___________________________________________________________________ M211187EN-C
The TS temperature value will be displayed in degree Celsius only if an
external PT100 element is connected to FSI102. If no PT100 element is
connected to FSI102 the TS temperature value is represented by five
forward slashes (/////).
The measured background luminance value will be displayed in cd/m
2
only if Vaisala LM21 Background Luminance sensor is attached to FS11.
If a day/night switch is used, the background luminance value will
display the switch state (1 = day, 0 = night).
MITRAS Emulation
For compatibility in the system level, the FS11 sensor also supports the
message number 6 format, frames, and polling format of Vaisala
MITRAS Transmissometer. The MITRAS polling format is accepted
only when the MITRAS message emulation is selected.
The MITRAS polling format is as follows:
P<Space><ID>
−∗
.
MITRAS Single Baseline
The MITRAS Single Baseline emulation mode is selected with command
SET MESSAGE TYPE MITRAS. The emulated Vaisala MITRAS
Transmissometer message is presented below:
∀
ID 1 V 4550 B ///// S0101
−∗#
where
∀
=
Start of the text
ID
=
ID
1
=
Unit ID (one character only)
V
=
Visibility heading
4550
=
Visibility 1 min average in meters
B
=
Background luminance heading
/////
=
Background luminance value
S
=
Status heading
01 (first)
=
Transmitter status
01 (second)
Receiver 1 status
#
End of the text