GE Bently Nevada 1900/27 - Configuring the Display for English or Metric Units; Initiating Self Test

Section 2 - Installation
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2.4.3 Configuring the Display for English or Metric Units
English/Metric Units lets you choose which measurement units are used to display
the overall vibration level on the LCD as shown in Table 2.6. You may need to re-
adjust the zero of the display slightly if you change the units. Refer to section 4.2.1
to calibrate the LCD zero.
Table 2.6: English/Metric
Units Settings
Switch 5 Setting Units
Off English Inches/second
On Metric Millimetres/second
2.4.4 Initiating Self Test
Initiate a Self Test by setting switch 6 to the ON position. Return switch 6 to the
OFF position once the test has started. The following actions occur during a
monitor self test, which lasts approximately 30 seconds:
• The relays are placed in their non-alarm states.
• Numerical segments of the LCD turn on for the duration of the self test.
• All LEDS turn on for the first 4 seconds of the self test.
• The signal path circuits are tested
• The alarm threshold detection circuitry is tested.
If an error is detected during self test, an error code will remain on at the end of the
self test. Error codes E1 and E3 are continually tested for during normal operation.
If a power supply failure occurs, E1 comes on. If a NOT OK occurs, the OK LED
goes off and E3 comes on. Error code E2, a signal path error, can only be detected
using the self test function. The error codes are shown in Table 2.7.
Table 2.7: Self Test Error Codes
Code Error
Explanation
E1 Power
The internal power supply voltages are not within tolerance.
E2 Signal Path
A fault exists in the vibration signal path, the alert or
danger threshold detection circuits, or the system clock.
E3 NOT OK
The transducer, transducer cable, or transducer power
supply are not functioning properly.