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Appendices
220 UDA2182 Universal Dual Analyzer Product Manual January 2009
Check that analyzer is working
1. Remove power from analyzer.
2.
Disconnect the probe and put the following resistor values on the terminal block of
the analyzer:
• Jumper (bare wire) - Anode(8) to Ref(9)
• 10k resistor - Ref(9) to Cathode(10)
• 5k resistor across thermistor leads - 4 and 5
3.
Turn analyzer back on.
4.
If you see a reading of between 5 and 10 ppm or 5000 and 10000 ppb at 25°C, the
analyzer is working correctly.
5.
If not, the analyzer maybe the problem. Consult Honeywell TAC for support.
Check that the analyzer and probe are working together correctly.
1. If not already done, connect the probe to the analyzer and power up the analyzer. Put
probe in a bucket of water for approx. 1 hour so it can stabilize before proceeding.
2.
Expose probe to ambient air for 3-5 minutes or until the temperature is stable.
3.
Press the Display key on the Analyzer until the following parameters DO,
TEMPerature, SALinity, and PRESSure are showing on the analyzer’s display.
4.
Perform a Visual Check on these parameters while the probe is in ambient Air:
5.
The Temperature is not flashing and is between 15 - 35 Deg C.
6.
DO’s Barometric Pressure is approx. in the range of 500 to 600 mmHg.
7.
The Salinity value should be 0.0 PPT. (Indicates that Salinity is turned OFF).
8.
If any of the above parameters are incorrect, make the necessary changes to correct
them so that they are as stated above.
9.
Perform an air calibration.
10.
When air calibration is completed, look at the DO value and the Temperature on the
Analyzer’s display.
11.
Confirm that these two parameters are correct by comparing them to values in Table
15-1. If the measured values are not similar to the table, the probe is suspect, call
*TAC for assistance.
12. With probe still in air, perform a Probe Bias Test under the Maintenance Menu.
13.
When completed, the display should look exactly like Figure 8-5 under Probe Bias
Test. If it does, move to Step 16.
14.
If the problem is a shift of the curve either to the left or right of the cursor, move the
cursor so that it is positioned on the flat portion of the curve. At this point, the probe
is suspect and should be sent to the Technical assistance Center for analysis. If the