System Overview 35
The system monitors the output energy of the halogen lamp during the cell blank check
and after each assay. The operator is alerted if the lamp performance is abnormal.
Use the Lamp Energy Monitor window to ensure that the halogen lamp is functioning
normally.
1 Photometer
2 Halogen Lamp
3 Cooling Tank
Figure 1-26. Location of the Spectrophotometer
ISE (electrolyte analyzer)
The ISE measures the amount of sodium (Na), potassium (K), and chloride (Cl) in serum
or urine samples through voltage measurement by ion-selective electrodes.
The sample-dilution probe (DPP) aspirates the sample for electrolyte analysis. The
electrolyte analysis uses buffer as reagents.
In a two-stage process, the buffer voltage is measured, then the sample voltage is
measured. The difference between these voltages, the reference voltage, and the
temperatures of the liquids determine the concentration of Na, Cl, and K in the sample.
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