Introduction; The Gas-Net System Idea; The Measuring Principle - Elster gas-lab Q1 Technical Documentation Manual

Introduction

1 Introduction

1.1 The gas-net system idea

is the generic term for an Elster device family. The evaluation
computer of the gas-lab Q1, too, is based on the gas-net device
family. All gas-net devices, including future device types, are characterised by
uniformity in appearance, operation and parameterisation.
Each Elster device always covers a multitude of measurement and control
functionalities.
gas-net devices also provide this functional variety. To keep the operation and
parameterisation of the devices well structured and user-friendly, the gas-net
series is based on a modular concept. A module corresponds to a special
functionality. Each module has its own main display within the device's menu
assistance, and each module has its own group of settings within the parameter
data record.
A particular module can be employed in different device types. This yields a
modular system that is advantageous to the user as a particular module can
always be operated and adjusted in the same way, no matter in which device
type it has been installed.

1.2 The measuring principle

The gas-lab Q1 measuring system is a gas quality analyser that performs
infrared absorption and thermal conductivity measurements. The primary target
variables are the gross calorific value, standard density and CO
natural gas being measured.
The entire measuring system consists of two components:
1. gas-lab Q1 sensor system
The actual sensor technology is located in an explosion-proof housing,
which can be installed in a hazardous environment.
2. gas-net Q1 evaluation computer
The evaluation computer of the Q1 measuring system is located in a non-
hazardous environment. The main tasks of the evaluation computer are
controlling and monitoring the measuring process, evaluating the sensor
measurements, calculating the target variables and supporting the user
during calibration. Furthermore, the evaluation computer contains an
gas-lab Q1
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content of the
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