FlowLine EchoPulse LR30 Series Manuale utente
Flowline, Inc. | 10500 Humbolt Street, Los Alamitos, CA 90720 p 562.598.3015 f 562.431.8507 w flowline.com AD301799 Rev A
Addendum for LR30 & LR31 Series
CONFIGURE LR30 OR LR31 TO A PRESSURE TRANSMITTER RANGE
Pressure Transmitters have a fixed span so the 4-20mA output cannot be changed and the application must
accept the span as is. In a typical application where a pressure transmitter is used, the location of 4mA will be
at the bottom of the tank (see below). The 20mA will be located well above the top of the tank due to the fixed
span of the device (see below).
Radar transmitters have a span that is adjustable to match the shape of the tank. Typically, the 4mA will be
located at the bottom of the tank and the 20mA will be located at the Full level of liquid (see below).
4-20mA span w/ Pressure Transmitter 4-20mA span w/ Radar Transmitter
The radar transmitter can be configured to match the fixed span of a pressure transmitter. Follow the
instructions below to configure your radar transmitter like a pressure transmitter.
STEP 1 – IDENTIFY THE SPAN OF THE PRESSURE TRANSMITTER
To span DataView™ to the full span of the pressure sensor, you will need the following information:
Maximum Pressure (MP) of the sensor in psi
Specific Gravity (SG) of the liquid
Units of operation (Feet or Meters)
Maximum Liquid Height (MLH)
o The equivalent height of liquid (in a virtual tank) at the full span of the transmitters (at 20mA)
To calculate MLH in Feet MLH = (MP x 2.31) / SG
To calculate MLH in Meters MLH = (MP x 0.704) / SG
EchoPulse®+ EchoPro®
Radar Liquid Level Transmitter
| 2 AD301799 Rev A
Example in Feet:
If MP = 15 psi and SG = 1.05, then
MLH = 15 x 2.31 / 1.05 = 33.00 ft...
MLH = 33.00 feet full
Example in Meters:
If MP = 15 psi and SG = 1.05, then
MLH = 15 x 0.704 / 1.05 = 10.057 m...
MLH = 10.057m full
STEP 2 – MEASURE THE SENSOR HEIGHT OF THE RADAR TRANSMITTER
Measure the distance from Empty to the measurement point of the radar transmitter. With the EchoPulse
LR30 series, the measurement point is the bottom of the sensor. This measurement is critical so accuracy is
of upmost importance.
Note: The 4mA location for the pressure transmitter will be slightly off the bottom of the tank. Take this into
account when calculating the Sensor Height Setting.
AD301799 Rev A 3 |
STEP 3 – DETERMINE THE OFFSET DISTANCE
The difference between the operational range of the tank and the actual span of the pressure transmitter is the
Offset Distance. Simply subtract the Sensor Height (SH) from the Maximum Liquid Height (MLH) to find the
Offset Distance.
Example in Feet:
SH = 20.0 feet
MLH = 33.00 feet full
Offset Distance = MLH - SH
o 33.00‘ – 20.00‘ = 13.0‘
o Offset Distance = 13.0‘
Example in Meters:
SH = 6.100m
MLH = 10.057m full
Offset Distance = MLH - SH
o 10.057m – 6.100m = 3.957m
o Offset Distance = 3.957m
STEP 4 – RECORD THE FACTORY DISTANCE ADJUST VALUE
The radar transmitter has a factory set Distance Adjust value. This is one of the settings you will change in the
following steps. Prior to the next steps, it is required to record this setting so that in the future you need to
change the setting back to a normal span, you will need this setting.
1. From the Main Screen, press Enter to advance
into the Main Menu.
2. Press Right Arrow repeatedly until the arrow
is next to Service (4).
3. Press Enter to advance into the Service
Menu.
4. Press Right Arrow repeatedly until the menu
shows Distance Adjust. (4.9).
5. Record the Distance Adjust. setting.
6. When done, press ESC to return to the Main
Menu, and press ESC a second time to return
to the Main Screen.
| 4 AD301799 Rev A
STEP 5 – CALCULATE THE NEW DISTANCE ADJUST
The New Distance Adjust is when you add the Offset Distance to the Factory Distance Adjust
New Distance Adjust = Offset Distance + Factory Distance Adjust
o 13.00‘ + -0.61‘ = 12.39‘
o 3.957m + -0.187m = 3.770m
STEP 6 – CONFIGURE THE RADAR TRANSMITTER
The radar transmitter will have 6 settings to configure: Empty, Full, Range, Dead Band, Distance Adjust and
Display. Refer to the Radar Trasnmitter’s Quick Start and/or Manual for detailed information in setting the
actual values.
EchoPulse LR30 Series EchoPro LR31 Series
Empty = Max. Liquid Height (MLH) value
Full = 0.00 feet or 0.000 meters
Range = Max. Liquid Height (MLH) value
Dead Band = Leave in Factory Setting
Distance Adjust = Change to New Distance Adjust
Display = Set display to Height
Sensor Heigth = Max. Liquid Height (MLH) value
Fill-Height = Max. Liquid Height (MLH) value
Range = Max. Liquid Height (MLH) value
Dead Band = Leave in Factory Setting
Distance Adjust = Change to New Distance Adjust
Display = Set display to Height
Example in Feet:
Empty = 33.00‘
Full = 0.00‘
Range = 33.00‘
Dead Band = 1.00‘
Distance Adjust = 12.39‘
Example in Meters:
Empty = 10.057m
Full = 0.000m
Range = 10.057m
Dead Band = 0.300m
Distance Adjust = 3.770m
Example in Feet:
Sensor Height = 33.00‘
Fill-Height = 33.00‘
Range = 33.00‘
Dead Band = 1.00‘
Distance Adjust = 12.39‘
Example in Meters:
Sensor Height = 10.057m
Fill-Height = 10.057m
Range = 10.057m
Dead Band = 0.300m
Distance Adjust = 3.770m
Flammable, Explosive or Hazardous Applications:
EchoPulse®LR30 series is available only as a General Purpose transmitter and EchoPro® LR31
series is available as an Intrinsically Safe transmitter only. This addendum is solely designed to
show how to configure EchoPulse® and EchoPro® as a pressure transmitter. Refer to the
products individual manual for information pertaining to all electrical wiring of the transmitter in
accordance with applicable NEC codes and safety requirements.
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