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Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
February 2015
F.3.19 Lower range value (P016)
This defines the process value (PV) represented by a 4 mA output from the transmitter. The span
of the 4–20 mA current output is defined by the Upper Range Value parameter (page 125) and
the Lower Range Value parameter.
Consider a tank with a 120 gallons capacity. When empty, a 4 mA output current is required
from the transmitter. Therefore, the lower range value is set to 0. The upper range value is
typically set to 120 (gallons) for the 20 mA output current to indicate an full tank.
The lower range value can be greater than the upper range value, in which case the current
output will decrease for an increasing process value (PV).
Note
The displayed units are selected using the parameter Primary Variable Units
(see page 120). Changing units does not re-scale the lower range value.
Field Communicator
To view or change the lower range value:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup, and then 1: Basic Setup.
3. Select 4: Lower Range Value P016.
4. If a change is required:
(a) Input a new value, and then select “ENTER” to save it.
(b) Press “SEND” to update the transmitter.
Note
When messages appear, take appropriate action if needed and press “OK”.
Mobrey MCU900 Series control unit
To view or change the lower range value:
1. From the Main Menu screen, select SETUP.
2. Select the transmitter (e.g. “Tx1:MSP400RH”).
3. Select OUTPUT, CURRENT, and then Low Range Val.
4. Follow the on-screen instructions to input and save the new setting. (Press the Enter
( ) key if prompted to change mode to “off-line”).
5. Select “Quit” to exit to the previous menu.
Fast Keys
2, 2, 1, 4
Lower Range Value P016
0 ft
0
ESC
DEL ENTER
HELP
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(Field Communicator Screen)
Low Range Val P016
0.000ft
Esc=Quit =Edit
(Mobrey MCU901 Screen)