Instrument installation Azbil Corporation
2-2 Model MTG11A/18A, MTG11B/18B, MTG14C
2-1 : Before installation
Criteria for installation location (1)
Introduction
To bring out the performance of this instrument to the maximum, choose the optimum
installation location according to the following criteria for installation location.
Cautions on surrounding environment
• Install at a place where the ambient temperature is in the range from -4°F to
+140°F (-20°C to +60°C) and ambient humidity in the range from 10 to 90%
RH. Otherwise, instrument failure or output errors may result.
• Avoid a place close to a large-current cable, motor or transformer that may
bring about inductive interferences. Otherwise, instrument failure or output
errors may result.
• Avoid a place where there are severe vibrations or a highly corrosive
atmosphere. Otherwise, a broken detector or damaged instrument may
result.
• Avoid a place exposed to direct sunlight. Otherwise, output errors may result.
Cautions on measured fluid
As to the measured fluid, the installation location must satisfy the following
conditions to avoid output errors and fluctuations.
• The electrical conductivity of the fluid to be measured must match the stated
specifications (specs vary according to converter used) and should be more or
less constant.
• The fluid to be measured must be electro chemically homogenized. For
example, if two fluids are mixed at an upstream a point, the device should be
installed at a point so that the two fluid can be evenly mixed by the time they
reach the measuring point.
• If an ingredient or additive is mixed in, the ingredient distribution must be
nearly uniform or homogeneous.
• For the accurate flow measurement, verify the zero point value in each
excitation current (Manual zero1, manual zero2, and manual zero3) by using
manual zero function, if the normal flow velocity is less than 0.3 m/s (0.98 ft/s).
• For the following fluids, do not use this instrument even if the electric
conductivity, temperature, pressure and others are within the instrument
specifications because they can cause problems in measurement.
(1) Fluids that have sufficient conductivity at high temperatures, but do not
satisfy the conductivity requirement at room temperature (about 68°F
(20°C)). (For example, fatty acids and soap)
(2) Certain fluids that contain surfactant (For example, rinse, shampoo and
CWM)
(3) Insulating adhesive materials (For example, oil, kaolinite, kaolin, calcium
stearate)
CM2-MTG300-2001.book 2 ページ ２０１５年９月２９日 火曜日 午前１０時１４分
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