a
Application
Display Indication
0
Liquid level measurement
"Li"
51-638 Echotel Model 338 Two-Wire Ultrasonic Transmitter
10
1.6.1 Measurement Configuration Parameters
The following pages explain how to configure each param-
eter of the
Complete Configuration
. Since some Parameter
Registers are not used by the 338, several parameters are
skipped. Refer to
Configuration Parameter Worksheet,
Section 2.8,
for a complete listing of all parameters.
Many of the registers have multiple configurations within
the same register. For example, P00 below is used to select
Metric or US, the engineering units, and the application.
Since some registers only have one configuration ("a"), and
some have more than one, the digit order for each register
is d, c, b, a.
P00: - cba
Application and Engineering Units
Factory default value for P00 is: 000
c
Measuring System
0
Metric
1
US
b
Engineering Units (see "c")
English
Metric
0
feet
meter
1
inch
cm
P01: - ba
Bar Graph and Measurement Mode
Factory default value for P01 is: 11
The bar graph can be set at "0" to indicate the strength of
the return echo, or to "1" to indicate the mA current out-
put as a percentage of the span.
The Measurement Mode configures the 338 for the
desired application. If "0" is selected the only measure-
ment value that will be displayed is distance. Selecting
other values will allow distance, level, and volume or flow
measurements to be displayed alternatively by using the
NEXT
key in the operating mode. The value of "a"
also determines the values of registers P40 through P48. If
"3" or "4" is selected these values will be volume parameters,
and if "5" is selected these values will be flow parameters.
