Parr Instrument 6300 - Manual (Page 56)

A
M
ENU
O
PERATING
I
NSTRUCTIONS
P a r r I n s t r u m e n t C o m p a n y 56
O
PERATING
C
ONTROLS
M
ENU
(C
ONTINUED
)
Use Spiking. • When set to ON, the calorimeter
will prompt for the weight of the spike added
and will compensate for the heat of combustion
in the calculations.
Heat of Combustion of Spike. • The heat of com-
bustion of spike is entered on sub-menu key-
board in cal/g.
Use Fixed Spike. • When set to ON, a constant
amount of spike is to be added to each test.
Weight of Fixed Spike. • The weight of the fixed
spike is entered on sub-menu keyboard.
Note:
The precision of tests with fixed spikes can be no better
than the accuracy of the spike weight.
Prompt for Spike before Weight. When set to ON, the
calorimeter will prompt the user for the weight of
the spike and the weight of the sample. Normally
the calorimeter will prompt the user for the weight
of the sample and then the weight of the spike.
Bomb Rinse Tank Controls:
Accesses sub-menu - Bomb Rinse Tank Control. Wash
water for the bomb is drawn from the Bomb Rinse
Tank. Users who wish to collect the bomb washings for
acid titrations or further analysis will want to fill it with
distilled or other suitable water.
Report Rinse Tank Empty. • When turned on the
calorimeter will notify the user when it believes
the rinse tank is empty based upon capacity of
tank and number of tests.
Rinse Tank Capacity. • Sets the number of tests
available from a full container. If the rinse tim-
ing controls have been changed, then the value
must be changed proportionally.
# Rinses Left. • This value provides an estimate of
how many rinses are left in the tank. This num-
ber is simply a counter not an actual measure-
ment of the volume in the tank.
Reset Rinse Tank Counter. • Resets the counter
when the rinse tank has been refilled. This
counter must be reset after the rinse tank is
refilled.
Rinse Time. • This value establishes the time that
the rinse water solenoid is turned ON for each
rinse cycle. When the rinse water solenoid
is ON, distilled water from the rinse tank is
pumped, under pressure, into the bomb cyl-
inder. This rinses the cylinder walls and the
bomb head. These rinsings are then pooled and
collected at the exhaust port of the calorimeter.
The factory default value is 2.5s. This value,
along with the # of rinse cycles, determines the
total volume of recovered rinse. These default
values will yield a total of 50 ml (approx.) of
bomb washings.
Rinse Flush Time. • This value is used to establish
a time between rinse cycles. During this time
the rinse solenoid is turned OFF. This off time
permits the rinse water to drain out before the
next rinse cycle begins. The factory default
value is 2s.
Clear Time. • This time value is used to establish a
post-rinse oxygen filling time for the bomb. This
step is used to clear the lines and valves of any
residual rinse water prior to the next test. The
factory default value is 10s.
# of Rinse Cycles. • This value establishes the
number of distinct rinse cycles used to rinse
the bomb. The factory default value is 3 rinse
cycles.