SPI – P 170 PERO XI DE
V1 20130904 5
2. Description and operation
2.1 Description of the SPI-P170
The SPI-P170 is supplied and preassembled on one assembly plate provided with:
1 Control-unit
1 Analysis-unit
Dimensions (L x W x H) = 485 x 485 x 100 mm
All parts are installed either water technical or electro technical. See figure 2.1.1.
2.2 Operation of the SPI-P170
The sample water is fed into the buffer jar. The buffer serves, as the name implies, as a buffer from
where the water can flow to the measuring cell. The surplus water will flow back to the buffer
system. The SPI-P170 will run the measurements of the water within a freely adjustable time. See
figure 2.2.1.
The measuring cycle of the SPI-P170 is as following:
Empty cell of previous measurement
Fill cell with the sample water and empty once more (rinse)
Fill cell with to be measured water and start measuring the zero value and empty again
Provide a shot of reagent, and fill the cell with a limited supply of water, measure the
discoloration
Fill the cell with some extra water and measure the discoloration again (2nd measurement to
check the saturation of the reagent, and to adapt the reagent valve time to save reagent), then
empty cell
Fill cell with the to be measured water and empty once more (rinse)
Fill cell fully with water
The drain valve empties the cell after every step. That water exiting the cell is led to the sewer.
2.3 Software structure of the SPI-P170
The SPI-P170 makes use of simple operating software. The complete operation is executed using the
buttons on the unit. The display shows measured values and settings. The hardware features an
internal memory wherein data, reports, and calibration settings are stored. This data is available on
demand and provided with a date and time of occurrence. When you have the optional SPI-REMOTE
software, it is possible control and see the information of the SPI using the network or internet. With
the optional SPI-GRAPHS software, you can use the data downloaded with the remote software, and
use this for data acquisition.
