Chapter 4 _________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 119
RECEIVER CONTAMINATION LIMITS
WARNING LIMIT ( 200)
ALARM LIMIT ( 500) 600
ALARM LIMIT UPDATED
The receiver values are expressed in hertz (Hz). The measurement range
is 0 ... 10 000 Hz, where 10000 Hz is a blocked lens. A contamination
change of 500 Hz represents about a 10% decrease in the receiver's lens
transmittance.
Hood Heaters
By default 0, no hood heaters are used. The hood heater option is factory
installed and may be used or disabled in the CONF session. All the
PWD32 heaters are switched ON below 2 °C and OFF at 5 °C. When
using hood heaters, separate 24 V heating power must be supplied. Hood
heating power is 30 W for each hood.
BAUD
The baud rate and communication type can be changed by the following
operator command:
BAUD value communication_type
Baud rates 300, 1200, 2400, 4800, 9600
Communication types E (7E1) and N (8N1)
The new value is saved in EEPROM and it is used also after reset or
power up. The default baud rate set at the factory is 9600 bps (8N1) in
FS11P use. The communication type definition is optional. It does not
change if the baud rate is changed.
The BAUD command displays the current baud rate and communication
type.
BAUD RATE: 9600 N81
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