User's Guide ______________________________________________________________________
36 __________________________________________________________________ M210667EN-C
Table 4 LT31 Nomenclature for the Options
Code Common Name Description
LTMK111 Mounting kit To be used when using an existing
concrete pad
LTMK211 Mounting kit with extended
foundation screws
To be used when casting the screws
into new pads
DMX501 Modem For remote communication (leased line)
LM21LT Background Luminance
Sensor
LM21 sensor with LT31 specific support
arm, mounting bracket and cable
LTBB111 Battery Backup QBR101 battery charger and battery
2Ah
LT31OBS Obstruction Light
LTTB111 TERMBOX option Junction box, AC, signal connections,
and enhanced lightning protection
LTOF111 Optical Filter Set Filter holder device with set of optical
filters for LT31 linearity check
LTSH111 Weather protection hood Standard weather protection hood
LTSH211 Weather protection hood
with PWD hood heaters
Standard weather protection hood for
cold climates with snow and frost
LTEH211-115 Enhanced weather
protection hood with
heating (115VAC)
Enhanced weather protection hood for
cold, demanding climates with snow or
ice storms
LTEH211-230 Enhanced weather
protection hood with
heating (230VAC)
Enhanced weather protection hood for
cold, demanding climates with snow or
ice storms
Table 5 LT31 Spare Parts
Code Common Name Description
LTM112 Transmitter measurement
unit
Enclosure with windows, heating, optics
unit, and air duct.
LTM212 Receiver measurement
unit
Enclosure with windows, heating, optics
unit, and air duct.
LTO112 Transmitter optics unit Incorporates optics tube, alignment
mechanism, and all electronic modules.
LTO212 Receiver optics unit Incorporates optics tube, alignment
mechanism, and all electronic modules.
LTC112 Measurement CPU
LTL112 Main transmitter module
LTD112 Main receiver module
LTL212 Window transmitter module
LTC212SP Master CPU
LTC212PWSP Master CPU Including PW-data option
FSP102 Power supply
LTB111-115SP Blower unit 115 VAC
version
LTB111-230SP Blower unit 230 VAC
version
214686 Blower particle filter
PWD22 Forward scatter sensor Complete spare unit
PWD spare
parts
Refer to PWD22 User's Guide
QMZ101 Maintenance cable
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