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<2. WIRING AND INSTALLATION>

2-3

IM 12A01A02-01E 8th Edition : Oct. 01, 2015-00

2.1 Installation site

The FLXA202/FLXA21 is weatherproof and can be installed both inside and outside. It should,

however, be installed as close as possible to the sensor to avoid long cable runs between the

instrument and sensor. When the pH sensor is used, the cable length including the sensor cable

should not exceed 20 meters (65.6 feet); 60 meters (197 feet) when using BA10 extension box

and WF10 cable.

For a conductivity sensor the cable run should not exceed 60 meters (197 feet). For dissolved

oxygen the sensor cable run should not exceed 30 meters (100 feet). For SENCOM pH/ORP the

sensor cable run should not exceed 20 meters (65.6 feet).

Select an installation site where the ambient temperature and humidity are within the limits of the

instrument specications (see chapter 2). If the instrument is installed outside and exposed to

direct sunlight, a sun shade hood should be used.

Ambient Operating Temperature: -20 to +55 ºC

Storage Temperature: -30 to +70 ºC

Humidity: 10 to 90% RH at 40ºC (Non-condensing)

Select an installation site that meets the following conditions.

• Mechanical vibrations and shocks are negligible

• No relay switch and power switch are installed close to the converter

• There is space for cable connection beneath the cable glands

• Not exposed to direct sunlight or severe weather conditions

• Maintenance is possible

• No corrosive atmosphere

• Water Protection: IP66, NEMA Type 4X (USA), Type 4X(Canada)

ISC

SENCOM

YOKOGAWA FLXA21 User Manual

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