CiDRA SONARtrac PW VF-100 - Manual (Page 180)

20835-01 Rev 04 Page 9-6
The current sensor minimum and maximum measurements as well
as the peak sensor values since the last peak history reset will be
displayed. A ‘!’ at the start of a line indicates that the sensor is
currently overloaded. This may indicate the sensor is not working
properly or the pre-amplifier gain is too high and should be
reduced. Pressing the ‘ENTER’ key will refresh the display.
Pressing the ‘→’ arrow key will display a prompt to erase the
sensor peak history. Press the ‘→’ arrow again to erase the peak
values.
Sensors typically have peak values of -32768 and +32767. Values
within the range of about -/+2000 to -/+8000 are considered to be
“ideal” when the process is operating at normal conditions. Note:
In most cases the passive sonar meter will operate properly
outside of the “ideal” range of values.
Sensor minimum and maximum values should be within about +/-
30% of each other. If one or more sensors are outside of these
values, contact Technical Support.
Press the ‘EXIT’ key to return to ‘Operational Mode’.
If the
‘Sensor Max / Min’ values are outside of their “ideal” range
adjust the gain per the procedures in Section 9.2.3.
9.3 Process Off-Line
Some times the passive sonar meter system is installed with the
process off-line. In this case, it is not possible to verify the proper gain
setting in the transmitter
If the process is off-line (not flowing) the following system checks
should be made.
9.3.1 Sensor Test
A Sensor Test all ‘ON’ sensors. (Individual sensors may be turned off
in the ‘Customize>Sensor Setup>State’ menu. Sensors should never
be turned off unless directed to do so by Technical Support
Personnel.) The test will take several seconds to perform. After the
test is completed, the screen will display test results.
A Sensor Test is made as follows:
Press any key except ‘EXIT’ on the keypad to enter the ‘Menu
Mode’.
The ‘Basic Config’ menu is displayed on Line 1 of the display.
Press the
↓ key to scroll to the ‘Diagnostics’ menu on Line 1.
Press the
‘ENTER’ key to access the options available under that
menu.
‘Sensor Check’ will appear on Line 2 of the display.