Riken Keiki GD-3EC, Technical Manual

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4. Installation 4-1 Installation precautions
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4-1-2 Restrictions regarding installation
<Do not install in locations subject to vibration or impact.>
The product contains precision electronic components. Install the product in a stable location not exposed to
vibration, impact, or risk of falling.
<Do not install in locations exposed to water, oil, or chemicals.>
Avoid installing in locations that pose the risk of splashing liquids such as water, oil, and chemicals. Deploy the
optional protective cover (main unit protection) and splash guard (sensor protection) if the product must be
installed in a location where it may be exposed to these factors.
<Do not install in locations where temperatures exceed the operating temperature
range.>
For information on the product operating temperature range, refer to ‘10-3. Detection target gases for individual
detection principles’.
Install in a stable location where temperatures do not exceed the operating temperature range during use.
<Do not install in locations subject to direct sunlight or sudden temperature changes.>
Install away from locations subject to direct sunlight or radiant heat (infrared radiation from high temperature
bodies) and locations subject to sudden temperature changes. Failure to do so may expose the product to
temperatures that exceed specified thresholds, internal condensation, or rapid temperature fluctuations the
product cannot handle.
Use of the optional sunshade cover is recommended when using the product in locations subject to direct
sunlight.
<Do not install in locations where maintenance is dangerous or not possible.>
The product requires periodic maintenance.
Do not install in the following or similar locations where maintenance is dangerous or not possible:

Locations where systems must be stopped to allow maintenance

Locations where part of the system must be detached to allow maintenance

Locations where the product cannot be removed due to the presence of pipes or racks

Locations where maintenance work is hazardous—for example, close to high-voltage cables
<Do not install in improperly grounded system housings.>
When installing in a system housing, be sure to implement a Class D-equivalent ground connection.
<Do not install in the presence of miscellaneous gases.>
Do not install in locations where the following gases are present:
Sensor type Gases affecting sensor sensitivity Sensor-corroding gases
SGF
・
Organic silicone gas (e.g., D4 siloxane, D5 siloxane)
・ Sulfur gases (e.g., SO
X
, H
2
S)
・
Corrosive gases (e.g., SO
X
,
NO
X
)
・
Acid gases (e.g., HF, HCl)
SHF
NCF
IRF None
ESF None None
<Precautions when installing in the presence of interference gases>
Take care when installing in locations where the following interference gases are present:
Sensor type Interference gas
SGF
Hydrocarbons, alcohols, organic solvents, etc. other than the target gas
SHF
NCF Hydrocarbons, alcohols, organic solvents, etc. other than the target gas
IRF
Combustible gas sensor: Hydrocarbons, alcohols, organic solvents, etc. other than the
target gas
CO
2
sensor: CO, N
2
O, NO, etc.
ESF Differs depending on sensor. (e.g., H
2
with CO sensor)