Vaisala LT31 User Manual

User's Guide ______________________________________________________________________
4 ___________________________________________________________________ M210667EN-C
Alignment Quality Control....................................................43
Preventing Contamination ...................................................44
Measuring Window Contamination ................................44
Hardware Descriptions ..........................................................45
Measurement Unit LTM112/212..........................................47
Optics Unit LTO112/212.................................................48
Main Transmitter Module LTL112 ..................................49
Main Receiver Module LTD112......................................50
Window Transmitter Module LTL212 .............................52
Measurement Head CPU LTC112 .................................53
Interface Unit LTI111/211....................................................55
Power Supply FSP102 ...................................................56
Master CPU LTC212......................................................58
Present Weather Detector Forward Scatter Sensor............59
Software Descriptions............................................................60
Master CPU.........................................................................60
Measurement CPUs ............................................................60
Optional Equipment Descriptions.........................................61
Background Luminance Sensor LM21 ................................61
TERMBOX-1200/TERMBOX-9000 .....................................62
Obstruction Light LT31OBS ................................................62
Battery Backup LTBB111 ....................................................63
CHAPTER 4
INSTALLATION............................................................................................67
Preparing Installation.............................................................67
Selecting Location ...............................................................70
Unpacking Instructions ........................................................70
Unpacking Procedure.....................................................71
Storage...........................................................................71
Equipment Grounding and Lightning Protection .................72
Cable Selection ...................................................................73
Line Power Cable...........................................................74
Communication Cable....................................................76
Communication Options........................................................78
Serial Communications Settings .........................................78
Serial Transmission with RS-232 ...................................78
Serial Multipoint Transmission with RS-485...................79
Modem DMX501 (optional) .................................................81
Multipoint Modem Connection........................................85
Installation Procedure............................................................85
Foundation...........................................................................86
Dowel mounting..............................................................87
Molded Screw Mounting.................................................89
Preparing Assembly of LT31.................................................92
On-site Receiver Installation ...............................................92
Setting up Receiver Mast to Foundation........................94
Setting Up Weather Protection Hood to Support Unit....95
Mounting Optional LM21 ................................................98
On-site Transmitter Installation .........................................109
Setting up Transmitter Mast to Foundation..................110
Setting up Weather Protection Hood to Support Unit ..110
Foundation Level Differences ......................................111
Tilting Transmitter Mast...........................................111
Mounting Optional Obstruction Light LT31OBS...........112

Vaisala LT31 Specifications

General

Brand	Vaisala
Model	LT31
Category	Measuring Instruments
Language	English