Hach BioTector B3500s, User Manual

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Page 111
8.3.2 System Program
SYSTEM PROGRAM 1
SYSTEM PROGRAM 1 TIC + TOC ▪ SYSTEM PROGRAM 1 TIC + TOC defines the system
parameters for Oxidation Phase operation in TIC & TOC
analysis mode. In TIC & TOC analysis mode, the TIC and TOC
contents of a sample are measured consecutively by means of a
single sample injection into a single reactor.

Sample Pump
▪ SAMPLE PUMP is a shortcut to Commissioning, Sample Pump
menu. See Section 8.2.2 Sample Pump for details.
ANALYZER ZERO 15s, 20 l/h
▪ CO
2
analyzer establishes a zero offset level for the ANALYZER
ZERO time (15s by default) with the oxygen flow (20 l/h)
settings.
▪ A “12_HIGH CO2 IN O2” fault is generated during this phase
and BioTector stops if the CO
2
analyzer’s reading is higher than
CO2 ZERO LINE plus the CO2 ZERO ALARM value (250ppm
by default) for three consecutive reactions. See Section
8.3.8
Fault Setup for details.
TIC ACID 6p ▪
TIC ACID specifies the amount of acid reagent (in pulses) to be
injected into the reactor at range 1.
SAMPLE LINE FILL 4p ▪ SAMPLE LINE FILL defines the number of pulses Sample Pump
operates forward to fill the sample tube between the Sample
Valve and the Reactor Valve.
SAMPLE IN 20p, P-V
▪
SAMPLE IN defines the amount of sample (in pulses) to be
injected into the reactor at operation range 1. P-V stands for
“Pinch Valve”, which identifies the type of valve used during
sample injection.
▪ A single pulse pump operation corresponds to ½ revolution of
the pump roller.
▪
Note that any change carried out on the factory SAMPLE IN
setting requires recalibration of the system.
DELAY 1s, 1 l/h
▪
DELAY is the time (1 second by default) the carrier gas is
activated to inject the reagents into the Mixer Reactor with a flow
of 1 l/h by default.
SAMPLE PORT PURGE 0.2s ▪ SAMPLE PORT PURGE defines the time (0.2 seconds by
default) Sample Pump operates reverse after the sample
injection. With this operation, the sample liquid, located inside
the tubing between the Reactor Valve (MV3) and the T fitting, is
discharged.
TIC SPARGE TIME 36s, 20 l/h
▪ BioTector sparges and measures the TIC content of the sample
for the TIC SPARGE TIME (36s) with the oxygen flow (20 l/h)
settings.
▪
If the TIC level does not drop below the TIC CHECK level
(10ppm CO
2
by default in Reaction Check menu) by the end of
TIC SPARGE TIME, BioTector automatically extends this time
(extension time) until the TIC level drops below 10ppm level.
▪
A “50_TIC OVERFLOW” warning is generated and BioTector
keeps running if the TIC level does not drop below 10ppm by 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.
BASE 34p
▪
BASE defines the amount of base (in pulses) to be injected into
the reactor for the reaction at range 1.
BASE OXIDATION 90s, 10 l/h
▪
BioTector oxidizes the sample for the BASE OXIDATION time
with the oxygen flow (10 l/h) settings. If any CO
2
is released
during this phase, it is measured and added to the TOC result
because the default setting of PEAK INTEGRATION is
TOC+BASE OXID in Result Integration menu.
TOC ACID 28p
▪
TOC ACID states the amount of acid (in pulses) to be injected
into the reactor for the TOC SPARGE phase at range 1.