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Reference Manual
IP2013, Rev BA
February 2012
4-11
Mobrey MSP422
f) Press the red button to save this false echo and exit to the menu.
However, if this false echo shouldn't be saved, press the blue button
to
exit to the menu.
g) To store another false target echo, re-start from step (b).
h) Press the green button
to exit the menu and return to the PV display.
NOTE:
If there are two false echoes stored (“Lrn2”), the transmitter will not allow
another echo to be stored until the memory is cleared (see next procedure.)
NOTE:
When a false echo is stored, the transmitter sets up a 'window' around the
false target and ignores any echo from that window, unless the echo received
from the liquid surface is larger than the stored false echo. There may be no
change in the transmitter output current while the liquid level moves through
this window, which is equivalent to a distance of 8 in. (20 cm).
NOTE:
See Figure 4-1 on page 4-3 for a map of the programming menu structure and
how to access all the menu options.
To clear all the stored false echoes:
a) If entering the menu system from the PV display, press the green button
repeatedly until the “Lrn” menu option is indicated (see above note.)
b) Press the blue button
to enter the “Lrn” menu.
c) With the display indicating “LrnX”, press and hold the green button
for
ten seconds to clear the memory. The display then indicates “Lrn0”.
d) Press the red button
to exit to the menu.
e) Press the green button
to exit the menu system and change to the
PV display.
FINAL CHECKS Final checks:
a) Check the display is reading correctly.
b) You may wish to check echo size again before re-fitting the enclosure lid.
c) Check that the cover seal is in place in the cover, and is good condition. It
should not be twisted or kinked in any way.
d) Carefully set the cover on the transmitter, and tighten the three cover
screws equally to seal the instrument.
e) Check that the cable gland is securely tightened and check sealing on the
cable sheath.
POWER FAILURE All parameters are held in EPROM memory. In the event of a power failure, or
disconnection from the power supply, the transmitter will remember all of it's
last parameter values and will resume correct operation once power is
restored.