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FAQ (Q&A) - FLXA21 -

Frequently-asked questions - FLXA21 -

| Specifications and Functions ｜ I/O and Communication ｜ Sensor ｜ Maintenance Service ｜ Explosion Protection ｜ Others ｜

Specifications and Functions

Q1	Is it possible to connect any type of two sensors at the same time?
Q2	When two sensors are connected to the FLXA21, how to output the measurement data of each sensor individually?
Q3	Two sensors can be connected to the FLXA21. Does the FLXA21 provide two analog outputs for two sensors' measurements?
Q4	In a redundant system using two sensors, the specification says that when sensor 1 fails, it switches to sensor 2 automatically. When sensor 2 is working as the main sensor and it fails, does it automatically switch to sensor 1?
Q5	When two conductivity sensors with different cell constants are connected, is it possible to switch an analog output of one sensor to one of the other sensor at a preset measurement value?
Q6	When two sensors are connected, is it possible to switch an output from main to sub and vice versa by a contact input?
Q7	If a conductivity (SC) module is inserted mistakenly into the second input position of FLXA21 on which first position a pH module has already installed, what happens?
Q8	When two sensors are connected, is it possible to switch an analog output automatically between two measurement data at a certain time interval by a timer function?
Q9	What kinds of calculation can be performed for two inputs?
Q10	When two inputs are made, is it possible to display them vertically? Is the first input displayed only at the upper side? Is it also possible to display the first input at the lower side?
Q11	When sensor 1 is being used for measurement and output, is the module of sensor 2 checking the state of sensor 2?
Q12	When measurement is being conducted by sensor 1, is only the sensor wellness of sensor 1 displayed on the screen?
Q13	What is the "pH Auto correct" function? Do the PH202 and PH450G have this function?
Q14	Trend data can be displayed. Is there any way to get these stored data from the transmitter?
Q15	Does error recovery take place automatically? If so, is it possible to check error logs on the FLXA21?
Q16	Does the FLXA21 have a temperature compensation function?

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I/O and Communication

Q1	The dedicated distributor PH201G or the distributor SDBT has two outputs of 1 to 5V. When two sensors are connected to the FLXA21, can these two outputs be used for each sensor's output respectively?
Q2	What kind of communication is available in the FLXA21?
Q3	What is HART communication?
Q4	What kind of device is required for HART communication?
Q5	It is stated that HART communication should be used when the FLXA21 has no display. Why is it necessary to perform HART communication?
Q6	How are calibration and setting conducted when the FLXA21 without display is selected?
Q7	Is it possible to set parameters through HART communication when the FLXA21 with displays is selected?
Q8	What is the HART network address of the device set at the time of factory shipment? Is it possible to change the HART network address?
Q9	Are there any restrictions on connecting a DCS of another manufacturer for HART communication?
Q10	What kinds of process variable can be viewed on FieldMate?
Q11	Is it possible to use FieldMate for adjusting and setting some FLXA21s and viewing process variables?
Q12	Is it possible to connect a BRAIN terminal?

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Sensor

Q1	Is it possible to connect the pH sensor of other manufacturer?
Q2	Is it possible to handle all types of pin, round and fork cable terminals?
Q3	Is it possible for the FLXA21 to use the existing PH8ERG/EFG?
Q4	Is it possible for the FLXA21 to use the existing DO410G sensor?
Q5	What is the shape of the FLXA21's terminal?

Maintenance Service

Q1	What is the procedure for replacing the sensor module to change a measurement object?
Q2	What is the procedure for adding a sensor module and changing the single sensor type to the two-sensor type?
Q3	Is it possible to purchase a sensor module independently?
Q4	How long does the backlight last, and is it possible to replace it?
Q5	Is there a recommended timing for replacing the liquid crystal display?
Q6	Is it necessary to adjust the display position on the indicator?
Q7	Why does digital communication reduce the maintenance and insallation cost?
Q8	How are the maintenance and calibration cycles determined and how is the sensor welness estimated?
Q9	Is there an exchange cycle estimation function? Is it possible to save calibration data as in the EXA450? How many points of data can be saved? Is it possible to save a correction value at the time of calibration?

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Explosion Protection

Q1	Is FM explosion protection supported?

Others

Q1	When the panel mount EXA202 is replaced with the FLXA21 plastic housing, the FLXA21 is smaller than the EXA202. Is there any component available to cope with this?
Q2	What kind of resin is used for the plastic housing? Does the resin deteriorate due to sunlight? Can it be used outdoors?
Q3	What kind of steel is used in the stainless steel case?

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