Liquid Controls SCAMP User Manual
Page 10
10
TEMPERATURE-VOLUME COMPENSATION (Optional)
If temperature-volume compensation is desired, your unit must be outfitted with a
standard 100-ohm platinum RTD temperature probe connected as shown in Step 2.
Temperature volume compensation permits accurate “net” volumetric deliveries of
product taking into account the thermal expansion or contraction of the liquid with
changes in temperature. The feature corrects the delivery to a standard reference
volume at a liquid temperature of 60
o
F (15
o
C).
IMPORTANT: PERFORM THIS OPERATION BEFORE PROCEEDING!
When accessing the temperature compensation and adjustment data, ensure that the
“0/1” jumper is in the “0” position.
STEP 6: Selecting a Temperature-Volume Compensation Table
♦ Refer to the table below and determine which table is appropriate for your
application. Set the Function Switch to the position dictated by your table selection.
If the volume compensation parameter has not been set for the table selected, an
“E40” error message will scroll on the LED display to indicate the missing parameter.
Function
Switch
VCF
Table
Type
Temp.
Scale
VCF Parameter
Range
Base
Temp.
Minimum
Temp.
Maximum
Temp.
Hold
Temp.
0 None
C N/A
N/A N/A
N/A N/A
1 Linear
F F 0-0.0025
60 -130 +212 -130
2 Linear
C C 0-0.005
15 -90 +100 -90
3
Table 24
F
0.500-0.550 SGU
60
-50
+140
-50
4
Table 54
C
0.500-0.600 SGU
15
-46
+60
-46
5
Table 54A
C
610.5-1075.0 Kg/m
3
15 -50
+95 -40
6
Table 54B
C
653.0-1075.0 Kg/m
3
15 -50
+95 -40
7
Table 54C
C
0.000486– 0.001674
15
-50
+95
-40
8
Table 54D
C
800-1164 Kg/m
3
15
-50 +95
-40
9 Table
6B F 0-85
°API
60 -50 +200 -40
A NH
3
C
N/A
15
-30
+40
-30
STEP 7: Setting the Volume Compensation Parameter
♦ Set the Data Switches on SCAMP to the desired VCF parameter. For example, the
maximum VCF parameter for Linear F compensation (Function Switch 1) is 0.0025,
which is entered on the Data Switches as 25006, where the last digit (sw1) specifies
positioning (left-shifting) of the decimal point. NOTE: A leading “0” indicates a
negative number, which is why 0.0025 must be entered as 25006 instead of 00254.
♦ Depress the Data Entry pushbutton to enter the value placed on the Data
Switches. The LED display will now scroll “Fxx.xx Px.xxx” where the first character
set represents the temperature sensed by the RTD probe in degrees Fahrenheit, and
the second character set represents the VCF parameter. Note that the first letter will
be an “F” or “C” depending on the temperature scale for the selected compensation
type.