Ronan X76CTM - Manual (Page 13)

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Enter product expansion
0.00065
Enter coefficient of expansion and press [ENT.].
Function 92 is used when the product name cannot
be found in product codes. The coefficient can be
viewed or changed with this function. It is not nec-
essary to enter the decimal point.
. .
78, Select Product [HI, LO]
The X76CTM has predefined the most common
hydrocarbon fuel products. To select a product, use
Function 78.
Select product (HI,LO)_1
Use the [HI] and [LO] keys to scroll through the pre-
defined list and select the chosen product.
0 = None
1 = Regular
2 = Premium
3 = Super
4 = Diesel
5 = Kerosene
6 = Toluene
7 = Hydraulic Oil
8 = #2 Heating Oil
9 = Turbine Oil
10 = Xylene
11 = Jet Fuel
12 = AV Gas
13 = Water
If the product is not listed, enter the product name
(to appear in reports) using Function 97, and its
coefficient of expansion using Function 92.
. .
97, Enter Product Name
If a product is not listed in the predefined list
(Function 78), a new product name can be added
by using Function 97 and its corresponding expan-
sion coefficient, using Function 92.
. .
47, Enter Tank Ullage %
Press Function 47, [ENT.] for programmable ullage.
Message will display:
Enter tank ullage 95%
Enter the % and press [ENT.].
. .
43, Delivery Threshold
When a product is delivered to a tank, the X76CTM
senses it and writes the date, time, amount, and
temperature of the delivered product. Sometimes, a
small amount of product pouring back in the tank
during transfer is not considered as delivery. To min-
imize confusion, the user can set up a value that
will eliminate the small levels. The default threshold
is 200 gallons. Use Function 43 to change the
delivery threshold and press [ENT.] to save.
Delivery threshold
100.0 gl
. .
75, Leak Detect Threshold
X76CTM has 4 leak-related alarms: Quick Test,
Precise Test, High Leak, and CSLD (Continuous
Statistical Leak Detection). The function for each of
these alarms may be programmed independently
using F82.
The Quick Test is started automatically after a pre-
defined, probe-dependent interval following a deliv-
ery (1 hour for X76MP, 7100, MTS-UST and
Veeder-Root MAG2). The result is compared to a
probe-specific threshold and, if a failure has
occurred, an alarm is generated. Testing immedi-
ately after a delivery is not precise, although still
within the EPA requirements. Ronan recommends
this result only as a leak indication, not as a basis
for programming station shutdown.
The Precise Test is run after a longer waiting period
following the delivery. It guarantees more accurate
results and a lower number of false alarms. Two
thresholds are possible for this test corresponding
to the 0.1 and 0.2 gallons/hour EPA requirements.
The thresholds are set automatically, and are probe
dependent. Normally, a station shutdown procedure
is specified for this alarm.
The High Leak alarm is activated whenever a gross
leak is detected. The leak must be higher than
9 gph, and lower than the minimal pump through-
put. High Leaks occur when a pipe is broken, or the
tank is physically damaged. The High Leak detec-
tion alarm time is shorter than a leak test, typically
less than 30 minutes.
The CSLD alarm is activated when long-term data
shows possible tank leakage. It is useful for busy
stations that do not have time to run a full test.
Since the result of the CSLD test is based on the
database compiled by short tests, it cannot be used
to confirm a leak. If a CSLD alarm occurs, the tank
must be shutdown and a full test, preferably a
Precise Test, has to be run.
To set up the leak test parameters, select F75.
Pressing [ENT.] at every parameter confirms the
current value.
Leak scatter is a very important parameter, since it
defines when the tank is quiescent, and a test can