The FT8062 series intelligent moisture analyzer consists of an electronic unit, an explosion-proof casing, and rod or coaxial sensors. The instrument can be installed as a whole or in separate units. Mainly used for content analysis of high dielectric constant substances in insulating media, such as water content analysis in oil.

　　measuring principle

After installation, the water content analyzer forms a concentric capacitance with the oil pipeline as shown in the figure, with one pole being the probe and the other pole being the pipe wall. In theory, its capacitance is:

C: Capacitor L: Effective probe length

A: Constant coefficient ε: the dielectric constant of crude oil (or insulating medium)

D2: Inner wall diameter of pipeline D1: Probe diameter

Usually, the dielectric constant of water is K=80, while the K value of most petroleum materials is only 2-2.9. Therefore, the overall dielectric constant of crude oil increases significantly due to the addition of water molecules. Therefore, we can use this characteristic to detect the water content in oil by measuring capacitance.

　　characteristic

Intrinsic safety design: Two wire intrinsic safety design, where both the unit and probe are inherently safe

Maintenance free: No moving parts, no wear or damage, no need for regular cleaning, no need for repeated debugging

Anti hanging material: Three end shielding technology allows it to ignore the influence of hanging materials on walls or sensing components

Reliable lifespan: Unique technology ensures instrument service life of up to 15 years

Safety protection: Built in filter, not easily affected or damaged by electrostatic shock and electrochemical phenomena

Reasonable sampling: The pipeline insertion probe is designed to directly measure fluid samples, and the measurement results are accurate and reliable

Intelligence: Data software processing, higher accuracy, with self diagnosis and custom linear correction functions inside the instrument

Communication: HART digital communication function

Button calibration: The instrument provides a button calibration function that can be implemented on-site

　　Typical applications

Automatic oil well testing

Separation container (electric desalination, electric dehydration, etc.)

Automatic transfer station in the well area

Dielectric constant analysis

Quality inspection of turbine lubricating oil

　　performance index

Measurement equipment level: CAT I level, transient rated voltage 1500V, cannot be used for levels other than CAT I level

Output: 4-20mA HART protocol, software adjustable current output direction

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

Power supply: 12-35VDC Smart communication requires a power supply of 15-35VDC

Power: less than 0.5W

Accuracy: Range accuracy

0-1% 0.03% water

0-5% 0.05% water

0-10% 0.2% water

0-50% 0.3% water

0-80% 0.3% water

Linear correction: Software selectable 10 point nonlinear correction (if necessary)

Temperature effect: 0.25%/10 ℃ (18 ℉)

Load resistance: Output circuit load resistance capacity of 600 Ω at 24VDC

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 (90% range)

Delay: 1-90 seconds (software adjustable)

Electrostatic spark protection (for sensors): anti surge impact 1000V, 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: 0-1%; 0-5%; 0-10%; 0-50%; 0-80% (heavy oil only)

Cable length: 5m (standard) (197 "), 0.1m (3.9") to 50m (1968.5 ") (optional), 50m (1968.5") to 100m (3937 "). Please consult the manufacturer for more information

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

Process connection: BSPT thread (standard, optional NPT), flange installation (optional)

Shell protection: Compliant with IP67 protection standard

Explosion proof grade: Ex ia IICT5/T6 Ga

Certification: CMC, PCEC/NEMSI. For other certifications, please consult the manufacturer

　　Probe indicators

　　Wiring diagram of intelligent moisture analyzer

The FT8062 series level gauge belongs to the intrinsic safety type of instrument. Whether installed as a whole or separately, when installed in hazardous environments, a jointly certified safety barrier needs to be added to its power supply circuit. Both single and double barriers can be used, but the connection method is different. The examples in the intrinsic safety application system and safety barrier wiring diagram are single barrier integral installation and double barrier separate installation. For safety barrier products that have been jointly certified, please consult our company or our agent. The maximum impedance of cables, loads, and safety barriers under 24VDC power supply is 600 Ω.

Please refer to the instructions for the use of safety barriers for grounding requirements. The requirements for safety barriers in this level gauge are:

Uo=28VDC

Io=93mA

Po=0.65W

Co=0.083uF

Lo=4.2mH

Safety parameters of this instrument:

Ui=30V

Ii=100mA

Pi=0.75W

Ci=6nF

Li=240uH

　　Installation requirements for intelligent moisture analyzer

The FT8062 series intelligent water content analyzer is of plug-in design and should be installed on pipelines, ensuring that the oil flow direction inside the pipeline is from bottom to top, as shown in the following figure.

The end of the DSH section of the intelligent moisture analyzer should be placed exactly at the center of the horizontal pipe of the pipeline.

The vertical part of the pipeline should be 300mm greater than the insertion length of the sensor.

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 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 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.

The instrument circuit installed according to intrinsic safety standards must be equipped with a safety barrier certified by GB3836.1 and GB3836.4 explosion-proof standards and meeting the requirements of this instrument.

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.