Hach BioTector B3500ul, Руководство пользователя

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Page 112
TOC SPARGE TIME 90s, 20 l/h
▪
BioTector sparges and measures the TOC content of the sample
for the TOC SPARGE TIME (90s by default) with the oxygen
flow (20 l/h) settings.
▪
If the TOC level does not drop below the TOC CHECK level
(25ppm CO
2
by default in Reaction Check menu) at the end of
TOC OXIDATION TIME, BioTector automatically extends this
time (extension time) until the TOC level drops below 25ppm
level.
▪
A “51_TOC OVERFLOW” warning is generated if the TOC level
does not drop below 25ppm at the end of the maximum
extension time, which is 300 seconds. The maximum extension
time is not a programmable function. It is a fixed figure within the
system software.
TOC OXIDATION 25s
▪
TOC OXIDATION determines the time (25s by default), the
ozone generator will be running at the start of the TOC Sparge
phase. Note that TOC OXIDATION time is part of the TOC
Sparge phase and does not increase the TOC SPARGE TIME.
REACTOR PURGE 54s ▪ REACTOR PURGE displays the overall time, the BioTector
purges the Mixer Reactor.
▪
During the REACTOR PURGE phase, system continuously
monitors the oxygen gas flow using the mass flow controller. If
any gas leak or any flow problem is detected during this phase,
BioTector generates a “06_ PRESSURE CHCK FAIL” or a
“02_LOW O2 FLOW - SO” fault and stops. These faults are
logged into the fault archive.
PRESSURE CHECK 20s, 40 l/h
▪
PRESSURE CHECK defines the time and oxygen gas flow (20
seconds at 40 l/h) the Mixer Reactor is pressurized for the
REACTOR PURGE phase above.
PRESSURE RELEASE 14s, 45 l/h ▪
When the gas flow is equal to or less than the PRESSURE
CHECK FAULT level, which is 6.0 l/h defined in Sequence
Program, Pressure/Flow Test Program menu, for longer than 1
second during the PRESSURE CHECK phase above, BioTector
opens the Reactor Valve (MV3) and releases the pressure of the
reactor for 14 seconds at 45 l/h oxygen flow by default using the
PRESSURE RELEASE function. With this process, the majority
of the liquid present in the Mixer Reactor is discharged into drain
through the Sample Out port.
PRESSURE PURGE 7s, 60 l/h
▪
When PRESSURE RELEASE phase above is completed, using
the PRESSURE PURGE function, the Mixer Reactor is
pressurized once again for 7 seconds at a higher oxygen flow of
60 l/h.
PRESSURE RELEASE 8s,45 l/h ▪ When the PRESSURE PURGE phase above is completed,
BioTector opens the Reactor Valve (MV3) and releases the
pressure of the reactor for 8 seconds at 45 l/h oxygen flow by
default using the PRESSURE RELEASE function.
▪ Unlike the first PRESSURE RELEASE phase described above,
the motor of the Mixer Reactor is activated during this phase.
With this process, any remaining liquid present in the Mixer
Reactor is discharged into drain through the Sample Out port.
CYCLES 0
▪
CYCLES defines the number of times the PRESSURE PURGE
and the PRESSURE RELEASE phases take place during the
REACTOR PURGE phase.
ANALYZER PURGE 15s 40 l/h ▪ BioTector purges the CO
2
analyzer for the ANALYZER PURGE
time (15s by default) with the oxygen flow (40 l/h) settings.
IDLE O2 FLOW 1 l/h ▪ When the BioTector is not running, that is when it is powered up
and in stop state, or when it is in remote standby state, the
carrier gas flow is set to 1 l/h by default.
REACTION TIME 4m46s
▪
REACTION TIME displays the total reaction time (in minutes and
seconds) for range 1, based on all programmed settings above.