Severn Trent Capital Controls CI1000B, Руководство по эксплуатации и обслуживанию

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1.4.4 Instrument Data:
Electronics Enclosure: NEMA 4X
Electrodes:
Cathode (measuring) - Gold
Anode (counter) - Copper
Reference - Ag/AgCl reference electrode
Shipping Weight: 22 lbs (10 kg)
Dimensions: 12.9" (w) x 12.9" (h) x 7.7" (d) (330 mm x 330 mm x 195 mm)
1.5 Principle of Operation
A sample of liquid is delivered to the sample inlet chamber at an approximate rate of 150
ml/minute. The excess overflows to drain. The flow to the analyser is monitored by a unique
infrared flow detection system (Reference Figure 2).
A 100 Ohm RTD is located in the inlet chamber, to allow for temperature compensations. The
sample then passes through an annular space between two electrodes in the sensing cell
assembly. (Reference Figure 3) As it passes, a small DC current is generated in direct linear
proportion to the amount of residual present in the sample. A third, reference electrode, located
upstream of the sensing cell, establishes a constant potential on the working electrode to provide
an accurate stable residual indication. The residual value is displayed on the dot-matrix display in
4 1/2-digit or graphical format. Residual units of ppb, µg/l, mg/l or ppm are user-selectable.
Figure 1 – Cl1000B Residual Analyser – Components