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Chapter 5
5-3
Built-In Diagnostic Tests
The following describes how to execute an automatic self-test. In general,
if the automatic self-test is successful, no further testing is required. How-
ever, if the automatic self-test is not successful, further fault isolation, util-
izing individual Built-In Tests is necessary.
5-3.1
Automatic Built-In Test Test
The automatic Built-In Test (BIT) runs whenever the power is applied to the
electronic housing or the reset button is cycled.
a. Switch power to the ADFM off.
b. Switch the power on again; however, make sure that at least one mi-
nute has passed since power was switched off. The computer screen
will display [COLD Wakeup], and the ADFM's LCD display will
show the "wake up message":
RD Instruments
-------------------
Acoustic Doppler
Flow Meter
c. The ADFM's LCD display will begin displaying the results of BIT
as these tests are executed. The BIT tests will take approximately
one or two minutes to perform after which the computer screen will
display the wake up message:
Broadband ADFM Version 6.xx
RD Instruments © 1991-94
All rights reserved.
d. To repeat the BIT tests you may turn and release the Reset key
switch, located at the front panel of the Electronics Unit.
e. To wake up the ADFM without performing the BIT, send a BREAK
from BBTALK, by pressing the <END> key. The above wake up
message will appear on the computer screen in approximately one
second; the LCD will not display this message.
page 5-2
MGD Technologies, Inc.
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