FT8210 series single dimensional pulse guided wave radar level gauge

The FT8210 series is a universal single dimensional pulse guided wave radar continuous level instrument, consisting of a circuit unit and pole or cable type sensing elements. The product is mainly used for continuous level measurement and has a wide range of applications.

　　measuring principle

Radar, originally used in the military field, emits electromagnetic waves and receives reflected waves to measure the distance and orientation of targets.

It is a single dimensional pulse radar with a pure radar system. The instrument emits an extremely low-energy small pulse electromagnetic wave, which propagates along a conductor at the speed of light. When encountering a large impedance change (such as a liquid level), a certain amount of energy is reflected back. Using ultra high speed circuits and devices, the time difference between the emission and reflection of the electromagnetic wave can be recorded to obtain the propagation distance of the electromagnetic wave, and thus the distance between the instrument and the liquid level (liquid level) can be obtained.

　　characteristic

AC/DC universal power supply

Superb data processing capability ensures reliable signal recognition

Measurement is not affected by the shape of the storage tank

Measure without being affected by electrical characteristics, insulation characteristics, temperature, pressure, or density

The measurement is not affected by dust, steam and foam

No movable parts, no need for regular maintenance

　　Typical applications

Liquid, lightweight slurry, particle, interface, powder

Water, acid, dilute alkali, oil level, grain, raw coal, oil-water interface, coal powder, cement, lime powder, flour

　　performance index

Measurement equipment level: CAT II, transient rated voltage 2500V, cannot be used for levels other than CAT I and CAT II

Output: Four wire system, 4-20mA, transmitter provides 4-20mA loop power supply

Measurement method: can be set as level/distance measurement method by software

Power supply: Universal power supply, automatic adaptation to 24VDC (20-35VDC) and 250VAC (30-265VAC) (50/60Hz)

Dissipative power: 2W

Measurement accuracy: 0.25% FS or+15mm (whichever is greater)

Resolution: 3mm (standard)

Temperature effect: 0.1%/10 ℃ (18 ℉)

Load resistance: Output circuit load resistance capacity of 400 Ω

Environmental temperature: T5: -40 to+70 ℃ (-40 to 158 ℉); T6: -40 to+60 ℃ (-40 to 140 ℉) (The influence of medium temperature on ambient temperature cannot exceed the instrument's requirements for ambient temperature)

Response time:<1 second

Delay: Adjustable from 1 to 90 seconds (software adjustable)

Electrostatic spark protection (for sensors): anti surge impact 1KV, anti-static 4KV/8KV

RF protection (built-in filter): The whole machine is tested by injecting current through a 10V/m electromagnetic field and a 3V/m electromagnetic field in space

Range: 0-5m (hard pole), 0-25m (soft cable)

Intelligent communication: USB HART protocol

Installation: Vertical installation

Electrical interface: Dual M20 × 1.5 (optional 3/4 "NPT)

Process connection: NPT thread installation (standard, optional BSPT), 4 "flange installation (GB standard, other optional)

Shell material: die cast aluminum with epoxy coating

Shell protection: Compliant with IP67 protection standard

　　Probe indicators

　　Installation requirements for FT8210

The installation, use, and maintenance of the product should comply with the relevant provisions of the product installation, commissioning, and use instructions, GB50257 "Code for Construction and Acceptance of Electrical Equipment in Explosive and Fire Hazardous Environments", GB3836.15 "Electrical Equipment for Explosive Gas Environments Part 15: Electrical Installation in Hazardous Areas (excluding Coal Mines)", and GB3836.13 "Electrical Equipment for Explosive Gas Environments Part 13: Maintenance of Electrical Equipment for Explosive Gas Environments".

When installing instruments, they should be kept as far away as possible from vibration sources, high temperature environments, corrosive air, and any places that may cause mechanical damage. If the requirements cannot be met, please replace the instrument with a new component. The ambient temperature should be between -40 and 70 ℃ (-40 and 158 ℉).

The instrument installation area requires lightning protection devices to prevent lightning strikes.

It is prohibited to use single component ambient temperature sulfurized sealant inside the instrument casing. This substance often contains acetic acid, which will corrode electronic components. Special two-component sealant (non corrosive) should be used.

The instrument casing is equipped with grounding terminals, and users should ensure reliable grounding during installation and use. When used for non-metallic cans, a standard ground should be provided on site and cannot be connected to the power ground.

The electrical interface should be equipped with cable sealing joints with a protection level of IP65 or above that meet the requirements of GB4208 standard, to ensure reliable sealing and prevent damage to the instrument electronic unit caused by water ingress or other corrosive gases.

Do not disassemble the sensor or loosen the sealing nut to avoid probe leakage.

The installation of sensors should avoid material flow or inlet/outlet ports. If there are no other installation locations, protective covers or partitions should be added.

The installation of threads or flanges should be firmly connected to the container, reliably sealed, and have good electrical contact. Except for the connection, other parts of the sensor should not come into contact with the container to ensure good insulation.

When installing hard rod sensors, installation space should be considered, with a distance of at least 300mm from the tank wall. Cable sensors should be straightened after installation, with a distance of at least 500mm from the tank wall to avoid short circuits to ground.

In situations where there is significant mixing, airflow, and material flow fluctuations inside the container to be tested, in addition to avoiding direct mechanical damage to the sensor, indirect mechanical damage such as long-term fatigue of the sensor material should also be considered. Therefore, it is recommended to install protective measures such as intermediate support and bottom anchor fixation for the sensor. Please note that the support and ground anchor should be insulated from the sensor, and the insulation material should be selected from materials with high insulation strength, low hardness, lubrication function, and no wear on the sensor (such as PTFE). If not, please consider replacing the sensor regularly to avoid sensor damage and chain loss.

When measuring large quantities of solid particles, the heavy hammer at the end of the sensor should be as high as possible above the cone angle of the silo. If it is necessary to enter the conical section, the maximum entry size should not exceed 20% of the diameter of the silo.

When the cable sensor is installed vertically, the hard rod part entering the tank shall not be less than 100mm.

Instruments installed according to explosion-proof standards must be equipped with explosion-proof stuffing boxes or explosion-proof steel pipe sealing joints certified by GB3836.1 and GB3836.2 explosion-proof standards for electrical interfaces.

The ripple of 24VDC power supply shall not exceed 100mV.

The instrument connection cable shall comply with the requirements of IEC60245/60227 standard. It is recommended to use armored shielded 3-core cables with an outer diameter of no more than 12mm. The cable conductor material is copper, and the cross-sectional area of the conductor is 0.13-2.1mm2 (AWG14-26). The insulation strength of the cable is 1500V. Long distance unshielded cables cannot be used in parallel with AC power cables.

When using and maintaining on site, the principle of "no opening with power on" must be followed, and it is recommended to shut off the power for 10 minutes before operation.