Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 29)

<2. WIRING AND INSTALLATION>
2-2
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
2.1 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 the pH sensor is used, the cable length including the sensor cable should not
exceed 20 meters (65.6 feet). 60 meters when using BA10 extension box and WF10 cable.
Select an installation site where the ambient temperature and humidity are within the limits of the
instrument specifications (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 95% RH (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
2.2 Removing the wiring cover
Before installing this instrument, open the front panel and remove the wiring covers, and then
install the cable glands.
Remove all the wiring covers. They are fixed at the places marked with ○ (circle) and Δ (triangle)
in Figure 2.2. Be careful not to damage the pawls when removing the covers.
NOTE
Be careful not to lose the wiring cover screws.
Wiring cover 1
(for the first module)
Wiring cover 2
(for the second module)
Wiring cover 3
(for the power supply and grounding)
Figure 2.2 Wiring cover