Introduction; General - Michell Instruments QMA601 User Manual

QMA601 User's Manual
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INTRODUCTION

1.1

General

The QMA601 Moisture Analyzer is designed to provide reliable, fast and accurate
measurement of trace moisture content in a wide variety of process applications where
keeping moisture levels as low as possible is of critical importance.
The high-contrast capacitive button operated LCD display presents all measured data
to the user in a clear and understandable format. The main display incorporates a real-
time trend graph and alarm indicators based on the NAMUR 102 standard. A powerful
and intuitive HMI makes control, logging and configuration of analyzer parameters easy.
The analyzer provides two user-configurable analog outputs, and Modbus RTU/TCP
communications, allowing it to interface with a SCADA DCS system, or by a computer
using the dedicated application software. A set of 4 adjustable volt free alarm contacts
allow the QMA601 to be used for direct process control.
Use Your Preferred Communication Media
For greater flexibility, the QMA601 offers:
• Modbus RTU/TCP
• 2 user-configurable analog outputs
• Status and Process Alarms
Minimal & Straightforward Maintenance
Sophisticated analyzers are often complicated and require experience and special care
in use, increasing cost of ownership. The QMA601 differs through its very uncomplicated
approach to field service; the Desiccant Column is easy to replace via its mounting on
the sampling panel. The moisture generator has an average life span of 3 years after
which it can simply be replaced with a calibrated moisture generator supplied by Michell
Instruments.
Automated Calibration for Continued Reliability
The QMA601 incorporates an integrated automatic calibration system for complete
user confidence. Periodic calibration checks of sensor performance can be initiated
on demand, or automatically (at user defined intervals and time of day), providing a
verification of analyzer performance and automatically adjusting out any change. The
moisture generator at the core of this system is supplied with a calibration traceable to
NPL and NIST, but an external calibration reference source can also be used if desired.
During a calibration cycle, the Data Hold function will prevent any interruption of
dependant processes by holding the analog outputs at the same level for the duration
of the calibration.
Michell Instruments
INTRODUCTION
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