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3.4 Service Functions
The Service Functions mode provides a menu of service test functions to assist in
failure diagnosis and identification. A logic flow chart is provided for reference of
the sequences included in the Service Functions mode.
TEST ELECTRODES
This mode allows for the measurement and display of electrode voltages.
Standard A, Standard B or an external sample can be measured to determine
electrode performance and provide measurement data useful in locating electrode
calibration faults. Each electrode parameter will be displayed and the electrode
voltage associated with the sample type selected can be observed.
Example Displays:
Std. A: Na=1582 Std. B: Na=237
K= 654 Cl=-904 K=-988 Cl=647
Ext: Na=1321
K=-598 Cl= -127
TEST SAMPLE SENSOR
In this mode, the sample sensor output is displayed which is useful for electrical
adjustment or for troubleshooting sample sensor faults. A dry sample sensor should
display a value of 100 with a range of 80 to 120. After verifying a dry sensor,
aspiration of a clear fluid (i.e., water) should increase the displayed value by at least
40 units.
Example Display:
DRY 80-120: 102 External: 153
YES=Pump/No=Exit Pump: NO=OFF
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