Hach BioTector B3500C User Manual Download

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Page 113

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



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

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, 40 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 40 l/h by default.

SAMPLE PORT PURGE 1p



SAMPLE PORT PURGE defines the number of pulses 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 25s, 40 l/h



BioTector sparges and measures the TIC content of the sample
for the TIC SPARGE TIME (45s by default) with the oxygen flow

(40 l/h) settings.



If the TIC level does not drop below the TIC CHECK level

(10ppm CO

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 130s, 10 l/h



BioTector oxidizes the sample for the BASE OXIDATION time
(130s by default) with the oxygen flow (10 l/h) settings. If any

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