Section 1 Instrument Overview; How To Use The Manuals; General Description; Instrument Enclosure - Hach APA 6000 Operation Manual

Section 1

1.1 How to Use the Manuals

1.2 General Description

1.2.1 Instrument Enclosure

1.2.2 Autoburette Module

6200018overview.fm
Instrument Overview
This instrument requires two manuals for complete operating instructions.
The APA 6000™ Installation and Maintenance Manual (Cat. No. 62005-18)
provides instructions for instrument installation, menu setup, operation,
maintenance, and troubleshooting.
This Parameter-specific Operation Manual (Cat. No. 62000-18) contains
information related to parameter specific instrument components and
software functions. Descriptions of reagents and standards and their
consumption rates, method of analysis, operational sequence, and bench
comparison testing are all addressed in this parameter specific manual.
The APA 6000™ High Range Hardness Process Analyzer is a
microprocessor-controlled process analyzer designed to continuously monitor
a sample water stream for total hardness (calcium, magnesium, and heavy
metals). Typical samples may include drinking water, raw water, cooling water,
and industrial water.
The analyzer can measure one or two sample streams with a cycle time of
8.2 minutes. It uses a colorimetric chemical method to determine hardness
concentrations in the sample stream. Measurement unit options include ppm,
mg/L, g/gal, and Gdh (German degrees of hardness).
Data communication and retrieval is done via the AquaTrend
keypad and display.
The reagent containers are sized to provide approximately 30 days of
continuous operation. The reagents are factory-filled in one-liter containers
and meet Hach quality standards. Prepare Reagent 2 prior to use by mixing
one bottle of Indicator Powder (Cat. No. 27931-35) into 1 liter of Buffer
Solution (Cat. No. 27930-53). Both powder and solution are included in the
Reagent 2 Kit (Cat. No. 27936-00).
The instrument enclosure houses various modules, the instrument's
power supply and control circuitry. Within the enclosure, a module panel
separates sensitive electrical components from the wetted parts.
All openings to the module panel are gasketed to protect against leakage.
The module panel folds out to allow access to the electrical connections at the
back of the instrument.
The internal instrument temperature is factory set at 50 °C (120 °F). The
design of the analyzer door and instrument panel provides a small, insulated
space ensuring temperature control for accurate analysis. In order for the
temperature control system to function properly, the instrument door must
remain closed and latched during operation.
The analyzer uses a positive-displacement autoburette to measure and
move fluids through the various analytical components in the instrument.
The autoburette module consists of a clear acrylic block which houses a
ceramic piston, a double seal for the piston, a linear actuator, a two-way
solenoid valve, and control circuitry. The overall volume of the burette is
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Interface
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Instrument Overview