17
PROGRAMMING THE LEVEL SENSOR
The tank level sensor comes pre
-
programmed. However, the set points (Q1 –
SP1 and Q1 –
RP1) can be adjusted to
configure the system specifically for the application.
The level sensor displays the tank level as a percent (%) full. However, all parameters are measured in millimeters
(mm) from the bottom of the probe. The usable range of the level sensor is between 10 mm and 410 mm from the
bottom of the probe, a 400 mm range.
There are two switching outputs that can be adjusted: Q1 and Q2. Output Q1 is used for the Auto
-
Refill feature and
output Q2 is used for the Low Tank Level indicator.
To access the above parameters from the main display (% full), press and hold the
“
Set
”
button. Use the up and down
arrows to navigate to
“
Q1MENU
”
or
“
Q2MENU
”
and press the
“
Set
”
button. Use the up and down arrows to navigate
to
“
SP1
”
or
“
RP1
”
(or
“
SP2
”
and
“
RP2
”)
and press the
“
Set
”
button. Use the up and down arrows and the
“
Set
”
button
to change the numeric values assigned to the given parameter. Instructions for setting other parameters can be found
on pages 32
-
35 of the provided component manual.
Assuming the tank has been initially filled and given the values in the above table, as the system is being used the level
in the tank will decrease. Once the fluid reaches 250 mm from the bottom of the probe, 63% full (100% * (250
-
10)/380=63%), Auto
-
Refill will turn on. As the fluid level rises and reaches 390 mm from the bottom of the probe,
100% full, Auto
-
Refill will be turned off.
If Auto
-
Refill is switched off or the supply is interrupted, and the fluid level reaches 10 mm from the bottom of the
probe, 0% full, the Low Tank Level indicator will turn on. This is intended as a warning that the system is not automati-
cally refilling. The Low Tank Level indicator will turn off once the fluid level rises above 50 mm from the bottom of the
probe, 10% full.
Menu
Parameter
Name
Description
Preset
Expert
Probe
Probe Length
Length of probe for this application
457 mm
Qa
QAHIGH
High Level 20ma
Maximum tank level (QAHIGH>QALOW)
380 mm
AutCal
Qa
QALOW
Low Level 4ma
Minimum tank level
10 mm
Qa
QAPOL
Configure
Analog output signal as configured
QA
-
Nrm
Qa
QATYP
Configure
Setting the output signal
Auto V
DspVal
Length
Configure
Display shows fill level in %
%
Q1
SP1
Switching Point 1
High Level
-
Auto
-
Refill stops filling
380
Q1
RP1
Reset Point 1
Low Level
-
Auto
-
Refill begins filling
76
Q1
OU1
Switching Function
Output Type
-
Normally Open/Closed
Qx
-
Hnc
Q2
SP2
Switching Point 2
Not Low Level
-
Indicator will turn off at or
50
Q2
RP2
Reset Point 2
Low Level
-
Indicator will turn on at or below
10
Q2
OU2
Switching Function
Output Type
-
Normally Open/Closed
Qx
-
Hno
