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4. Perform the appropriate action.
Temperature control system on
message
a. Press Stop Test.
b. Look at the status area to see if the D38
code has disappeared.
c. Allow the system to reach operating
temperature.
Temperature control system off
message
the system cannot reset the temperature control
system.
5. Press Exit Test.
Use this procedure to test the measurement electronics. You can:
S print stored signals from the last successful two-point calibration
S test the sensor circuit without a sensor and with a test/blank sensor
1. Access the Measurement Test from the Menu screen:
a. Select
3 Troubleshooting and press Enter.
b. Select 3 Measurement and press Enter.
c. Select 1 Measurement and press Enter.
2. Press
Print Last Cal Mv.
3. Compare the results on the report to the expected values in the following
tables.
pH 194.0 to 406.0 mV 20 to 90
pCO
2
–216.0 to +106.0 mV 25 to 90
pO
2
–0.129 to +2.071 nA 5 to 90
Na
+
29.0 to 131.0 mV 15 to 90