300-R010-45G Datasheet, PDF (25/36 Pages) Magnetrol International, Inc. – Echotel® Model 300/301 Ultrasonic Non-Contact Transmitter For Level/Volume/Open Channel Flow

SOFTWARE CONFIGURATION cont.
ADVANCED CONFIGURATION MENU
The Advanced Configuration menu sets many parameters that
are not normally used in the operation of the unit. The
Advanced Configuration menu can be accessed from the run
mode by pressing ENT and or until the display shows:
The entire Advanced Configuration menu is shown below,
followed by the configuration instructions for each item.
Adv Config
to select
Menu Display
Adv Config
to select
Calibrate
xxxx units
Gain Limit
32
Starting Gain
0
Damping (1-60)
6
Echo Loss Delay
1 sec
Default Display
Level
Change Password
to select
Adjust Loop Pts
to select
Enter Tag Line
to select
Previous Menu
to select
Advanced Configuration Menu
Menu Item Explanation
Enters the Advanced Configuration menu. Press ENT.
Used to adjust for the speed of sound if the ultrasonic signal is going through media other than air.
NOTE: It is strongly recommended to consult the factory prior to using this feature!
Used to limit the gain to a value between 0 and 32. Since the unit adapts its gain to suit the application, it is not
recommended to use this feature unless instructed to by the factory.
Used to adjust the starting gain to a value between 0 and 32. Since the unit adapts its gain to suit the application,
it is not recommended to use this feature unless instructed to by the factory.
Used to set the damping (1-60 seconds) for the unit. This value can be changed depending on how turbulent the
process is, or if the rate of fill is very fast or slow.
Used to set a delay (1-150 seconds) of the Fault Alarm (relay #1) when an echo loss occurs.
Allows the default display to be changed from Level to Loop (4-20 mA), or Volume or Flow if in the Volume or
Flow mode.
The factory preset password is 300. This screen is used to change the password for security purposes.
Offsets to the mA current loop can be made.
Used to replace the “Magnetrol Int’l” tag with a user-defined tag such as vessel number or location. Any
alphanumeric characters can be entered as a tag.
Reverts back to the beginning of Advanced Configuration.
Calibrate
NOTE: It is not recommended to use the calibrate feature
unless specifically directed to do so from the factory.
The Model 300/301 performs level measurement by timing
how long it takes for a round trip ultrasonic pulse to travel
from the face of the transducer to the liquid surface and
back. The measurement assumes that this round trip is in air
where the speed of sound is 1128 feet/second. This speed of
sound is altered when going through gases other than air.
The Calibrate mode can be used to adjust for the speed of
sound when going through homogenous (not stratified lay-
ers) gases other than air. However, since most gases exist as
stratified layers of vapors above the liquid surface, the
Calibrate mode is rarely used.
When entering the Calibrate mode, the display will indicate
the distance that the 300/301 has measured from the face of
the transducer to the liquid surface. If this distance is in error,
measure the actual distance and enter this value.
NOTE: Using the Calibrate mode may cause false level read-
ings. Consult factory for reset procedures.
Gain Limit
This displays the value of maximum gain that the unit will use.
This value is from 0-32 and the unit steps up in single-gain
increments until a suitable signal is received. Limiting the gain
to a lower value may help with secondary echo problems.
Enter a value between 0 and 32. Enter Password will be dis-
played and your chosen password must be entered at this
time. Press ENT to acknowledge the password.
Gain Limit cont.
The Model 300/301 adapts its gain to suit the conditions of
the application. There are 32 gain steps. The higher the num-
ber, the higher gain/drive required to detect an acceptable
signal.
Starting Gain
The gain starts out at a value of zero and adjusts itself to a
value (between 0 and 32) such that it can reliably measure
the liquid surface. Approximately once a minute it will reini-
tialize the gain starting from zero to make sure that the unit is
measuring the proper distance. This is particularly helpful in
tall vessels or those applications with turbulent surfaces. A
higher Starting Gain value will decrease the time for the unit
to achieve the proper Gain value. Adjusting the starting gain
should not be done without consulting the factory.
Damping
The factory default value is 6 seconds for damping. This
value can be changed (from 1-60) depending on the rate of
fill (or empty) of the vessel. Larger damping values can be
beneficial if the liquid surface is turbulent due to the vessel
fill, or agitation from a mixer.
Echo Loss Delay
Used to set a delay (1-150 seconds) of the Fault Alarm (relay
#1) when an echo loss occurs. This helps to avoid a fault
alarm if the 300/301 momentarily loses the ultrasonic signal
due to excessive turbulence, foam or other application
parameters.
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