itaia Photometer FM-1, Руководство по эксплуатации

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Operating manual: PHOTOMETER FM-1 10
3. 1. Setting up PC Communication
Photometer should be connected to the computer via serial COM port using RS-232 (485)
protocol. Cable length can be up to 20 metres
(using optional RS-485 up to 200 m)
.
In the upper right corner of the screen there is a field for adjusting communication
parameters. COM1 is selected as default. If port is occupied by other device the
message “Port closed!” appears. In this chase select another port and click “Open port”.
If port is successfully open, the message "Port OK!" appears. Communication speed is
fixed at 9600 bps. When communicating, photometer must be powered on!
In the upper left corner of the screen there is a field indicating the photometer’s ID
number. This is used to identify the device when there is more than one photometer
connected on the bus
(RS-485)
. Use the last two digits of the device’s serial number
(see
back side sticker)
for ID.
3. 2. Writing Data to the Photometer
Left part of the screen contains data to be downloaded to the photometer
(black font)
;
right side shows data read from the photometer
(red font)
. By clicking “Write” button all
data consisting of 16 contactor-switch combinations, range, averaging interval and other
parameters are downloaded to the photometer. Data is only applied to device with
accurate ID number. When download is done successfully red numbers as read data
appears on the right side of the screen. In case of error at the procedure, “Error!”
message appears. If so, check ID number and try downloading again.
Range
Use “Range” setting to define measuring range of the photometer. Always use lowest
possible range, taking care brightness never exceed the range specified. In “auto” mode
photometer switches ranges according to light conditions. Use this option when
brightness data is acquisition is done from RS-232/485 or contactor outputs. When using
analog outputs, make sure to choose fixed range R1-R3 and match range in equations.
Default factory setting for range is full measuring range -R3.
Contactor outputs
Contactor combinations field Level 1-16 represents the upper brightness limit (cd/m
2
) for
each level. For entry you can use only numerical data. When the option “Expander” is
selected, software fills contactor-outputs combinations like BCD code. Use this option
only when optional Expander unit is used to controll more than 4 light chains. In this
chase final contactor-combinations are programmed at Expander unit.
The contactor-output combinations can be set for each level independently when option
“Custom” is set. When using less than 16 brightness level combinations, fill the rest of
the Level data with zero, and Level 16 with combination used when brightness at any
level specified are exceeded. (See: Picture 4 and Table 2).