Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 3)

<1. Wiring and Installation>
1
IM 12A01A02-12E 4th Edition : Sep. 3, 2013-00
1. Wiring and Installation
Open the cover and remove the plastic inserts covering the modules. They will be reinstalled
after the wiring is completed.
1.1 Installation site
The 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 a 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 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
• Ambient Operating Temperature: -20 to +55 °C
Humidity: 10 to 95% RH (Non-condensing)
• Water Protection: IP66 (except Canada), Type 4X (except Canada), Type 3S/4X (Canada)
Select an installation site where the ambient temperature and humidity are within the limits of the
instrument specifications (see chapter 2.1 in the instruction manual). If the instrument is installed
outside and exposed to direct sunlight, a sun shade hood should be used.
The FLXA21 can be mounted on a wall, pipe or panel when the mounting kit is ordered *this
is how we will keep the unit in stock*. For dimensional information please refer to section 3.6
Mounting Methods in the instruction manual.
CAUTION
See Apendix
Media No. IM 12A01A02-12E 4th Edition : Sep. 2013 (YK)
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