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d. Take a reading of the actual sensor output signal.
e. Wait 100 seconds, and take another reading.
value = (reading 1 – reading 2) / 100 seconds
f. Calculate the resulting value and then compare the resulting value to the
expected value:
Sensor Circuit Expected Value
pCO
2
–0.800 to +0.800 mV/s
pO
2
–0.300 to +0.300 nA
pH, Na
+
, K
+
, Ca
++
, or Cl
–
–0.545 to +0.545 mV/s
Glu I, Glu A –5.348 to +5.348 nA
Lac I, Lac A
–5.348 to +5.348 nA
g. Press Stop Test.
CAUTION: Touch the inner surface of the module frame to discharge static
buildup before removing or returning sensors.
6. Reinstall the sensors:
a. Open the measurement module door.
b. Remove the test/blank sensor.
c. Reinstall the measurement sensor.
NOTE:ĄĂIf you want to test another sensor, repeat steps 4b through 6c.
d. Reinstall the reference sensor if you removed it.
e. Close the measurement module door.
CAUTION: Before you press Exit Test, replace all sensors to prevent fluid from
spilling into the measurement module.
7. Press
Exit Test.
Perform a two-point calibration to ensure optimum performance.
NOTE:ĄĂIf you encounter any difficulties when performing or interpreting the
results of this test, contact your Service Representative for assistance.
860
!
!