Hydronix Hydro-Mix HT, Руководство по установке

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Chapter 1 Hydro-Mix HT Installation
12 Hydro-Mix HT Mechanical Installation Guide HD0766 Rev 1.2.0
1 Introduction
The Hydro-Mix HT is a flush mounted digital microwave moisture sensor designed for measuring
in flowing organic materials. The sensor can be installed in drying, ducting, mixing, and
conveying systems and is manufactured from food safe materials
The sensor reads at 25 times per second, which enables rapid detection of changes in moisture
content in the process, including determination of homogeneity in mixing processes. The sensor
can be easily connected to any control system and may be configured remotely when connected
to a PC using dedicated Hydronix software. A large number of parameters are selectable, such
as the type of output and the filtering characteristics.
2 General to Flowing Material Applications
For accurate moisture measurement the Hydro-Mix HT should be installed in a location where
the material is in contact with the ceramic disc at a controlled consistent flow rate.
Follow the advice below for good sensor positioning:
•
Locate the sensor where the material flows at a consistent rate.
•
When installing the sensor in a curved surface, ensure that the centre of the ceramic disc
is flush with the radius of the internal wall.
•
A sampling point has to be available close to the sensor for calibration purposes.
•
Avoid areas of severe turbulence in the material flow.
•
Ensure the sensor is located where the material is not allowed to build up on the ceramic
disc.
•
Position the sensor away from any electrical interference (See Electrical Installation
Guide HD0678).
•
Position the sensor so that it is easily accessible for routine maintenance, adjustment and
cleaning.
3 General to Mixer Applications
A significant benefit of the Hydronix system is that only one sensor is required in the mixer.
However, it is important that it is positioned correctly in relation to the mixer type, material and
water inlets, and other moving parts such as blades and paddles. Although paddles or scraper
blades can be a useful mechanism to keep the sensor free from material build up, they could
cause damage to an incorrectly positioned sensor. It will be necessary to periodically check the
position as the mixer blades, paddles and floor wear away. In all installations, it is recommended
that the sensor is fitted in an area where it is away from any possible collection of ‘sitting’ water.
As the mixer floor wears, the sensor will occasionally need to be adjusted downwards in the
mixer, to maintain the correct position in relation to the mixer floor. Additionally the blades will
need to be adjusted to maintain the efficiency of the mixing action and cleanliness of the ceramic
disc.
If the sensor is allowed to protrude into the mixer it will be susceptible to damage from the mixer
blades/paddles as well as from abrasive materials becoming trapped between the paddles, mixer
floor and exposed side wall of the sensor.
NOTE: Damage caused under these circumstances will not be covered by warranty
For accurate and representative moisture measurement the sensor must be in contact with the
moving stream of material. It is equally important that no material can build up over the Ceramic
Disc to obscure the sensor readings.
Follow the advice below for good sensor positioning:
•
It is a good idea to provide a small inspection lid in the mixer cover, so that during mixing,
and when the mixer is empty, the Ceramic Disc may be observed without having to raise
the main cover plate.