Round Horizontal Tank Calibration Table
The following tables can be used to calibrate the meter for displaying
volume in a round horizontal tank. The right-most column in each
table gives an example of actual calibration points for a 500-gallon
tank.
Number of Points: 10
Maximum Error: 0.3% Full Scale
Number of Points: eight
Maximum Error: 0.5% Full Scale
Table 3: Round Horizontal Tank Calibration Points
25
Calib.
Input
Display:
Display: (Example)
Point
(mA)
(% Volume)
(500 Gallon Tank)
1
4.0
0.00
0.0
2
4.8
1.80
9.0
3
6.0
7.20
36.0
4
7.2
14.20
71.0
5
9.2
28.10
140.5
6
14.8
71.80
359.0
7
16.8
85.80
429.0
8
18.0
92.80
464.0
9
19.2
98.10
490.5
10
20.0
100.00
500.0
Model LI1X Universal Process Meter
Instruction Manual
24
Select Square Root Extraction (
L or S
)
With the square root extraction function activated, the meter takes the
square root of the input signal (the output from a differential pressure
transmitter) and displays flow rate. The square root extraction feature
is calibrated using the same
S
ingle
B
utton
S
caling technique that is
used for two-point linear calibration. Calibration involves setting only
three points: the zero flow rate (usually zero), the high flow rate and
the Low-flow Cutoff point.
To program the meter for square root extraction, push
ENTER
. When
(
L or S
) appears, push
ENTER
again. The meter will flash (
L or S
)
alternately. Push
ENTER
when (
S
) is flashing. After (
S
) has been
selected the meter will switch to indication mode and is ready to be
calibrated.
Program Low-flow Cutoff (
C
vtoFF
)
Low-flow Cutoff allows the meter to be programmed so that the often
unsteady output from a differential pressure transmitter at Low-flow
rates always displays zero on the meter.
Example: If Low-flow Cutoff is set at 12, any rate less than 12 will be
displayed as "0".
To program Low-flow Cutoff:
1. Push
ENTER
, when
C
vtoFF
appears push
ENTER
again.
2. Set Low-flow Cutoff per
Five Basic Digit/Display-setting
Instructions on page 19.
Notes:
1. To disable Low-flow Cutoff, program cutoff value to zero.
2. Low-flow Cutoff is only available when using Square Root
Extraction.
Model LI1X Universal Process Meter
Instruction Manual
Calib.
Input
Display:
Display: (Example)
Point
(mA)
(% Volume)
(500 Gallon Tank)
1
4.0
0.00
0.0
2
4.8
1.90
9.5
3
6.4
9.50
47.5
4
8.4
22.40
112.0
5
15.6
77.70
388.5
6
17.7
90.50
452.5
7
19.2
98.10
490.5
8
20.0
100.00
500.0
Spec Tech Industrial Electric
www.spectechind.com
888-773-2832
Spec Tech Industrial Electric
www.spectechind.com
888-773-2832
