Yokogawa FLEXA Series Analyzers FLXA21-D-P-D-AB-C1-NN-A-N-LA-N-NN Two Wire System Analyzer

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 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 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, NEMAType 4X (USA), Type 4X(Canada

The method to connect the grounding terminal is different for the FLXA202 and FLXA21. For the safety of the user and to protect the instrument against interference, the converter housing must always be connected to a class D ground (a ground resistance of 100 ohm or less). l Grounding the FLXA202 housing Use the terminal outside the converter housing for grounding (Figure 2.9A). Use a ring terminal. When connecting the converter to a distributor, connect the shield of a double-core shielded cable to the terminal on the terminal block in the converter. Do not connect the shield to the ground terminal in the distributor. l Grounding the FLXA21 housing Connect a single separate cable for grounding to the terminal block in the housing (Figure 2.9B). Use a cable with an outer diameter of 3.4 to 7 mm. Since the cable is very thin, set the sleeve inside the standard cap of the cable gland and pass the cable through it. Sleeves are supplied with cable glands (Figure 2.6). When connecting the converter to a distributor, connect the shield of a double-core shielded cable to the terminal on the terminal block in the converter. Do not connect the shield to the ground terminal in the distributor