Forcesensor Test - GE Hydran 201 i Instruction Manual
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Also See for Hydran 201 i:
- Installation manual (37 pages) ,
- Instruction manual (266 pages)
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• CheckSum: Checksum of the above values. This value is added to the list to avoid
erroneous values from being entered.
This submenu does not allow to modify the displayed values. To change the values, use the
NewSensor submenu (Section 4.5.8 on page 4-25).
The values of the H201 sensor's ten parameters are stored in the H201Ti's nonvolatile
memory.
4.5.4.2
ForceSensor Test
This function is used to test the operation of the Hydran 201 sensor. The Hydran 201Ti
verifies the sensor by injecting a small dc current in the sensor for a few seconds and then
reading the gas level. This test correlates strongly with the sensor response to dissolved
gases and thus allows the H201Ti to reliably assert the actual condition of the sensor. The
result is immediately interpreted by the microprocessor as follows:
• If the sensor is operating properly, the message Good is displayed, but no message is
recorded in the historic data file Events. The H201Ti's display returns to the Main
Display mode (see Section 4.2.2 on page 4-4) after the H201 sensor output signal has
returned to normal (two minutes).
• If the sensor test fails (in other words, if an alarm condition is detected), the fail alarm is
triggered, the test result is recorded in the historic data file Events and a message is
displayed on the H201Ti's display.
Note: All alarms are ignored for two minutes following the H201 sensor test.
The messages that can be displayed following a sensor test are shown in Table 4-6 on
page 4-20. For the troubleshooting procedure for each of these alarms, see Section 12.1 on
page 12-1.
In addition to the manual tests, a semimonthly, automatic test of the H201 sensor is
performed the first and fifteenth days of each month at midnight. For each automatic test,
certain parameters are recorded in the historic data file Service (see Section 4.5.1.4 on
page 4-14) for further analysis by General Electric Canada.
Note: Each H201Ti is configured for a specific H201 sensor. If you receive more than one
H201Ti's, take the necessary precautions not to interchange the sensors and H201Ti's.
Part 17997
Rev. 6, March 2011
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