YSI P 700 IQ Analyzer - Manual (Page 12)

12 ba76133e01 09/2013
P 700 IQ
Fig. 1-5,  12 shows the photometer unit installed.
Fig. 1-5: Photometer unit without plastic cover
1 Controller housing
2 Status LED
3 Optical block
4 Joint connection cable for supply voltage and communication
5 Overflow vessel
6 Valve block with inlet and outlet tubes
7 Peristaltic pump
How it functions The photometer unit is supplied with d.c. voltage by the PS15V power
pack and operated by a controller (1). It communicates with the
IQ S
ENSOR N ET through the MIQ/WCA 232 interface.
In conjunction with the peristaltic pump (7), the valve block (6) controls
the movement of the liquids (sample, reagent, standard solution, clean-
ing solution).
The photometer unit draws the sample from the overflow vessel (5). Fil-
trated sample continuously flows through the overflow vessel. Thus the
sample is constantly available and free of air bubbles. The filtration unit
(available as an accessory) in conjunction with the filtration pump
(instrument option "P“) provides an optimally prepared sample.
The absorbance of the reaction mixture is measured in the optical block
(3). The optical block has an LED as the light source and photo diodes
as a detector. After the measurement, the liquid is removed from the
optical block.
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3
4
5
2
7
6