User Manual

26
Approximate k-Factors
VALUES ARE FOR PROVING USE ONLY. NOT TO BE USED AS ACTUAL K-FACTORS.
LC Meter Size Max Flow Rate/Gallon Revs / Gallon Pulses / Gallon Pulses / Litre
P
60 12.237 4894.8 1293.11
M/MA 5
60 4.079 1631.6 431.04
M/MA 7/10
150 5.555 2222.0 587.01
M/MA 15/25
300 2.058 823.2 217.47
M 30/40
450 0.742 296.8 78.41
M 60/80
800 0.398 159.2 42.06
MS-75
700 0.255 102.0 26.95
MS-120
1200 0.158 63.2 16.70
SETUP - CALIBRATION SETUP


1. With the selector switch in the calibration position,
navigate to the Calibration Setup 1 screen.
2. Use the instructions on the page 25 to run a single point
calibration.
3. Navigate to Calibration Setup 3. Move the pointer  to
Linearization Mode: and select Setup.
4. Move the pointer  to the BEGIN CALIBRATION
DELIVERY eld.
5. Press the EntEr button to begin the calibration fueling
into a volumetric prover. A fueling screen will appear that
shows the gross volume and ow rate.
6. To end the fueling, move the pointer  to the END
CALIBRATION DELIVERY eld at the bottom of the
calibration fueling screen.
7. Move the pointer  to the Prover Quantity: and
enter the quantity indicated by the volumetric prover.
8. The LCR 600 will automatically display a Point #: list
box with the numbers 1-10. Select a number.
9. The LCR 600 will then display a Linearization Flow
Rate text box. Enter the ow rate of the proving run. The
percent error is calculated automatically.
Multi-Point Calibration Proving
Multi-point calibration improves overall owmeter accuracy by attening out the accuracy curve across ow rates.
Although accuracy tends to lessen at lower ow rates, the repeatability of Liquid Controls’ owmeters remains
consistent. The owmeter might not be perfectly accurate at low ow rates, but it is inaccurate the same amount each
time. Multi-point calibration takes advantage of the steadfast repeatability of a Liquid Controls owmeter by identifying
the amount of inaccuracy and correcting it with a linearizing algorithm during fuelings. In order to apply the linearizing
algorithm, the degree of error for points along the accuracy curve must be identied by making a number of fuelings
at different ow rates into a volumetric prover. Multi-point calibration is very benecial for owmeter systems that
experience a wide range of ow rates (for example, trucks that ll tanks of varying sizes) and for owmeter systems
that have recently undergone maintenance or other alterations that could change the accuracy curve itself.
Run the rst multi-point calibration fueling at the same
ow rate used in step 2.
Keep Flow Rates Even
For the rst two proving runs, one should be near the maximum
ow rate and one near the minimum ow rate of the owmeter.
When choosing ow rates after the initial two proving runs, split
the difference until all points are within 0.25% of each other.
Multi-Point Calibration Tip
Proving runs are in gross volume only.