Brooks Instrument BM50 - Manual (Page 31)

3-7
Section 3 Operation
BM Oval Series
Installation and Operation Manual
X-PD-BM-Ovals-eng
Part Number: 541B031AAG
January, 2009
Programming Procedure
The Programming procedure (PROG) is applicable for programming,
selecting or deleting values on SETUP-level. The procedure is executed as
follows:
1) Enter the desired SETUP sublevel as detailed in Section 3.2.1
2) Press PROG briefly,
3) Enter a value or make a selection with the pu keys.
4) Set the operation by pressing ENTER.
To change a value, use u to select the digits and p to increase that value. To
select a setting, both
 and  can be used. When the new value is not valid,
the increase sign  or decrease-sign  will be displayed while you are
programming. When data is altered but ENTER is not pressed, then the
alteration can still be cancelled by waiting for 20 seconds or by pressing enter
for 3 seconds: the PROG-procedure will be left automatically and the former
value reinstated.
TOTAL; MEASUREMENT UNIT - SETUP LEVEL 11:
SETUP - 11 determines the measurement unit for TOTAL and accumulated
Total. The following units can be selected:
L - m3 - kg - lb. - GAL - USGAL - bbl - _ (no unit).
Alterations of the measurement unit will have consequences for operator and
SETUP-level values. Please note that the K-factor has to be adapted as well
(the calculation is not done automatically).
TOTAL; NUMBER OF DECIMALS DISPLAYED - SETUP LEVEL 12:
The decimal point determines for Total and accumulated Total the number of
digits following the decimal point. The following can be selected:
0000 - 111.1 - 22.22 - 3.333
TOTAL; K-FACTOR - SETUP LEVEL 13:
With the K-factor, the flowmeter pulse signals are converted to a quantity. The
K-factor is determined on the basis of the measurement unit and the number
of pulses generated per measurement unit by the flowmeter. Enter the
number of pulses generated by the flowmeter per selected measurement unit
(e.g per litre). The more accurate the K-factor, the more accurate the
functioning of the system will be.Example 1: Calculating the K-factor.
Let us assume that the flowmeter generates 2.4813 pulses per litre and the
selected unit is “cubic metres / m 3 “. A cubic metre consists of 1000 parts of
one litre which implies 2,481.3 pulses per m 3 . So, the K-factor is 2,481.3.
Enter for SETUP - 13: “2481300” and for SETUP - 14 - decimals K-factor “3”.
Example 2: Calculating the K-factor.
Let us assume that the flowmeter generates 6.5231 pulses per gallon and the
selected measurement unit is gallons. So, the K-Factor is 6.5231. Enter for
SETUP - 13: “6523100” and for SETUP - 14 decimals K-factor “6”.
TOTAL; NUMBER OF DECIMALS FOR K-FACTOR TOTAL - SETUP
LEVEL 14:
This function determines the number of decimals for the K-factor (SETUP13).
The following can be selected:
0 - 1 - 2 - 3 - 4 - 5 - 6
Please note that this function influences the accuracy of the K-factor
indirectly. This setting has NO influence on the displayed number of digits for
Total (SETUP 12).