Filter
Top Products
125
Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
February 2015
F.3.18 Upper range value (P015)
This defines the process value (PV) represented by a 20 mA output from the transmitter.
The span of the 4–20 mA current output is defined by the Upper Range Value parameter and
the Lower Range Value parameter (page 126).
Consider a tank with a 120 gallons capacity. When full, a 20 mA output current is required from
the transmitter. Therefore, the upper range value is set to 120 if the PV is in gallon units. The
lower range value is typically set to 0 (gallons) for the 4 mA output to indicate an empty tank.
The upper range value can be less than the lower range value, in which case the current output
will decrease for an increasing process value (PV).
Note
The upper range value is automatically overwritten when the Tank Shape/NLP parameter is
used to select a flume flow profile, but the populated value can still be edited if required.
See Table F-1 on page 119 for the 20 mA point values.
The displayed units are selected using the parameter Primary Variable Units
(see page 120). Changing units does not re-scale the upper range value.
Field Communicator
To view or change the upper range value:
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup, and then 1: Basic Setup.
3. Select 3: Upper Range Value P015.
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 upper range value:
1. From the Main Menu screen, select SETUP.
2. Select the transmitter (e.g. “Tx1: MSP400RH”).
3. Select OUTPUT, CURRENT, and then Up Range Val.
4. Follow the on-screen instructions to edit 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, 3
Upper Range Value P015
34.5 ft
34.5
ESC
DEL ENTER
HELP
w
s
q
a
z
Lock
Shift
@ &
á ü
x
e
d
c
r
f
v
t
g
b
y
h
n
u
j
m
*
-
+
/
.
0
7
4
1
8
5
2
9
6
3
i
k
o
l
FN
(Field Communicator Screen)
Up Range Val P015
34.500ft
Esc=Quit =Edit
(Mobrey MCU901 Screen)