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Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
February 2015
F.3.6 Bottom reference (P010)
This is the transmitter’s Bottom Reference setting. It is the distance measured vertically along
the ultrasonic beam path from the user preferred sensor reference point to the zero level of a tank
or an open channel (see Figure F-1 on page 106). It is not necessary to have the 4 mA output
start at the zero level, and the 4 mA starting pointing can be any liquid height above or below
this zero level.
Note
This parameter is important for calibrating and configuring the transmitter.
Field Communicator
To view or change the bottom reference:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 1: Basic Setup.
4. Select 2: Bottom Reference P010.
5. If a change is required:
(a) Input the new bottom reference, and then press “ENTER” to save it.
(b) Press “SEND” to update the transmitter.
Mobrey MCU900 Series control unit
To view or change the bottom reference:
1. From the Main Menu screen, select SETUP.
2. Select the transmitter (e.g. “Tx1:MSP400RH”).
3. Select DUTY.
4. Select Bottom Ref.
5. Follow the on-screen instructions to input and save the new setting.
(Press the Enter ( ) key if prompted to change mode to “off-line”).
6. Select “Quit” to exit to the previous menu.
Fast Keys
2, 2, 1, 2
Bottom Reference P010
36.000 ft
36.000 ft
ESC
DEL ENTER
HELP
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FN
(Field Communicator Screen)
Bottom Ref. P010
36.000ft
Esc=Quit =Edit
(Mobrey MCU901 Screen)