Emerson Rosemount 326L, Quick Start Manual

Page: 33 / 52

Note
Use the Hnc switching function if the switching output is used as an overflow
prevention. The principle of normally closed operation ensures that the level
transmitter also detects wire breaks or cable breaks.
Set switching limits (hysteresis)
Use these steps to set the hysteresis limits for the switching output.
Procedure
1. Ensure that the function Hno or Hnc is set for ou1 or ou2 .
2. Select SP1 or SP2 then set the value at which the output is set.
3. Select
rP1
or
rP2
then set the value at which the output is reset.
Note
rPx is always smaller than SPx . The level transmitter accepts only values which are
lower than the value for SPx . If SPx changes, rPx also changes provided that the
lower end of the setting range is not reached.
Set switching limits (window)
Use these steps to set the limits for the window switching output.
Procedure
1. Ensure that the function Fno or Fnc is set for ou1 or ou2 .
2. Select
FH1
or
FH2
then set the upper limit of the acceptable range.
3. Select FL1 or FL2 then set the lower limit of the acceptable range.
Note
FLx
is always lower than
FHx
. The level transmitter accepts only values which are
lower than the value for FHx . If FHx changes, FLx also changes provided that the
lower end of the setting range is not reached.
Set switch-on delay for switching outputs
Follow these steps to set the switch-on delay for switching outputs.
Procedure
1. Select
dS1
or
dS2
from the menu.
2. Set the value between 0.0 and 60 seconds.
Note
The switch-on delay reacts according to VDMA. According to VDMA, the switch-on
delay always effects SP and the switch-off delay always effects rP irrespective of
whether the level transmitter uses the normally open or normally closed function.
Quick Start Guide Operation
00825-0100-4326 January 2019
Quick Start Guide 33