51-638 Echotel Model 338 Two-Wire Ultrasonic Transmitter
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1.7.1 Minimum Level/Empty Tank (4 mA setpoint)
The 4 mA setpoint is configured with the liquid at its
minimum level in the tank. Alternatively, the Model 338
may be placed at a distance from a target corresponding to
the minimum level (maximum distance) in the tank.
1.7.2 Maximum Level/Full Tank (20 mA setpoint)
The 20 mA setpoint is configured with the liquid at its
maximum level, or the 338 can be pointed at a target cor-
responding to the maximum level (minimum distance) in
the tank.
Action
LED indication
Check for a valid echo
= Valid echo received, transmitter
is to be programmed
Press NEXT
steadily
= Transmitter is in
programming mode
While continuing to press
= Distance has been assigned to
NEXT
,
also press
4 mA
UP steadily
Release both buttons
= 4 mA programming is
complete
Use level in tank or a fixed target e.g. the wall
Action
LED indication
Check for a valid echo
= Valid echo received, transmitter
is to be programmed
Press NEXT
steadily
= Transmitter is in
programming mode
While continuing to press
= Distance has been assigned to
NEXT
,
also press
20 mA
DOWN steadily
Release both buttons
= 20 mA programming is
complete
Use level in tank or a fixed target e.g. the wall
