Calibration Procedure:
The Lumax Electronic Flow Meter permits making quick and precise electronic calibration by changing the calibration factor (k factor). There are 2 dif
ferent ways of calibration:
1.
On-site calibration, performed by means of a dispensing operation.
2.
Direct calibration, performed by directly changing the k factor.
To enter the calibration phases it is necessary to press and hold down the “Menu” button.
Why enter the calibration phases?
• Display the currently used calibration factor
• Return to factory k factor after a previous calibration with user k factor
• Change the calibration factor using one of the two previously indicated procedures.
In calibration mode, the partial and total dispensed quantities indicated on the display screen take on different meanings according to the calibration procedure phase. During the calibration, the Flow
Meter cannot perform any normal dispensing operations. In calibration mode, the totals are not increased.
Caution:
The Lumax Electronic Flow Meter features a non-volatile memory. It keeps the calibration and dispensing
data stored even after replacing new batteries or long periods of inactivity.
3. Display of Current “K Factor” and Restoring “Factory K Factor”:
By pressing the MENU key while the appliance is in standby (Press Button for 3 Seconds),
the display page appears showing the current calibration factor used. If you are using the Flow Meter with
“factory k factor”, the display page shown in the diagram will be displayed, with the word “fact”
(Fig. 14)
.
If one “user k factor” has been set, the calibration factor set by the user (in our example 0.998) will be displayed.
The word “user” indicates a calibration factor set by the user is being used
(Fig. 15)
.
The Flow chart alongside shows the switchover logic from one display page to another. In this condition,
the Reset key permits switching from “User” factor to “Factory” factor.
To confirm the choice of calibration
factor, quickly press MENU while “User” or “Fact” are displayed. After the restart cycle, the meter uses the
calibration factor that has just been confirmed.
Attention:
When the “Factory Factor” is confirmed, the old “User Factor” is deleted from the memory.
In-field Calibration:
This procedure calls for the fluid to be dispensed into a graduated sample
container in real operating conditions (Flow Rate, Viscosity, etc.) requiring absolute precision.
WARNING:
For correct Flow Meter calibration, it is most important to:
• Completely eliminate air from the system before calibrating
• Use a precise Sample Container with a capacity of not less than 5 liters, featuring an accurate
Graduated indicator.
• Ensure calibration dispensing is done at a constant flow rate equivalent to that of normal use,
until the container is full
• Not reduce the flow rate to reach the graduated area of the container during the final dispensing
stage (the correct method during the final stages of sample container filling consists in making
short top-ups at normal operation flow rate)
• After dispensing, wait a few minutes to make sure any air bubbles are eliminated from the sample
container; only read the Real value at the end of this stage, during which the level in the container could drop.
• If necessary, carefully follow the procedure indicated below.
Fig. 14
1.000
FACT
c
al
Fig. 15
0.998
user
c
al
12.345
Q
TS
23412.3
TOTAL
G
AL
c
al
1.000
FACT
c
al
12.345
USER
c
al
1.000
FACT
12.345
Q
TS
23412.3
TOTAL
G
AL
R
R
C+C
C
STAND BY
STAND BY
C
R+R
Long RESET
R
Short RESET
C+C
Long CAL
C
Short CAL
Time Out
LEGEND:
In-field Calibration Procedure
Action
Display
1 NONE
Flow Meter in “Stand By” (not in counting mode)
2 LONG MENU KEY KEYING
Flow Meter enters calibration mode, shows ”MENU”
and displays the calibration factor in use instead
of total. The words “Fact” and “USER” indicate
which of the two factors is currently in use.
3
LONG RESET KEY KEYING
Flow Meter shows “MENU” and the partial at zero.
Flow Meter is ready to perform on-site calibration.
4
DISPENSING INTO SAMPLE CONTAINER
Without pressing any KEY, start dispensing into the sample container.
Dispensing can be interrupted and started again at will. Continue dispensing until the
level of the fluid in the sample container has reached the graduated area. There is no
need to reach a preset quantity.
5
SHORT RESET KEY KEYING
Flow Meter is informed that the calibration dispensing
operation is finished. Make sure dispensing is correctly
finished before performing this operation. To calibrate
the Flow Meter, the value indicated by the partial totalizer
(example 9.800) must be forced to the real value marked
on the graduated sample container. In the bottom left part of the display an
arrow appears (upwards and downwards), that shows the direction (increase
or decrease) of the “USER” K Factor value change when the operations 6 or 7
are performed.
Action
Display
6 SHORT RESET KEY KEYING
Arrow direction changes. The operation can be repeated
if necessary.
7 SHORT/LONG CAL KEY KEYING
The indicated value changes in the direction indicated
by the arrow - one unit for every short ”MENU” key
keying - continually if the ”MENU” key is kept pressed
(for the first 5 units slowly and then quickly). If the desired
value is exceeded, repeat the operations from point (6).
8 LONG RESET KEY KEYING
Flow Meter is informed that the calibration procedure is
finished. Before doing this, make sure the Displayed
Factor is the Actual Factor.
Flow Meter calculates the new “USER” K Factor. This calculation could require a
few seconds, depending on the correction to be made. During this operation
the arrow disappears but the ”MENU” indication remains. If this operation is
performed after operation (5), without changing the indicated value, the “USER”
K Factor would be the same as the Factory K Factor, thus it is ignored.
9 NO OPERATION
At the end of the calculation, the new “USER” K Factor is shown for
a few seconds, after which the restart cycle is repeated to finally
achieve standby condition.
ATTENTION:
From now on, the indicated
factor will become the calibration factor used by the meter and
will continue to remain such even after a battery change.
10 NO OPERATION
Flow Meter stores the new calibration factor and is ready
for dispensing, applying the newly defined “USER” K Factor
12.345
Q
TS
12.5
TOTAL
G
AL
1.000
Q
TS
G
AL
(user)
c
al
FACT
0.000
Q
TS
c
al
field
9.800
Q
TS
c
al
field
9.800
Q
TS
c
al
field
9.800
Q
TS
c
al
field
9.800
Q
TS
c
al
field
-----
Q
TS
c
al
END
9.860
Q
TS
c
al
FACT
Indicated Value
Real Value
9.86
9.800
Q
TS
c
al
0.0000
G
AL
Indicated Value
Real Value
9.86
1.015
Q
TS
c
al
END
0.000
Q
TS
1234.5
TOTAL
G
AL
c
al