OPERATION MANUAL

MST2000 HART® Communications Information

Typical Point to Point Connection with analog signaling.

If the ca ble is lon ger than sev eral me ters, it’s re sis tance and ca pac i tance may be come significantinthe HART® RC time-constant lim i ta tion ® x C[65 mi cro sec onds). When us ing a sin gle field de vice and a host with a 250 ohm load and no other sig nif i cant re sis tance, the 65 mi cro sec ond lim i ta tion would al low

0.26uF of ca pac i tance for the sys tem. Al lowing 0.01uF (10,000 pF) for the host and field de vice (each having a CN=1), the to tal ca ble ca pac i tance could be up to 0.25 uF. However, if the cable resistance was 110 ohms, the sys tem re sis tance be comes 360 ohms, which then al lows for a to tal per mit tedcable

ca pac i tance of 0.18uF. This cor re sponds to a nom i nal ca ble length of 900 me ters for a ca ble with a rat- ing of 200 pF/meter. If the cable needs to be extended upward towards the maximum HART® cable length of 1500 me ters, a ca ble with a lower ca pac i tance rat ing must be se lected.

•In a multi-dropped system, the additionalcapacitance from each net worked trans mit ter must also be considered. Each transmitter has an es tab lished CN value. A CN value of 1 in di cates that the transmitterrepresents 5000 pF of load capacitance.

•The MST2000 trans mit ter has a CN Value of 1 ( 5000pF).

•The internalresistance of the MST2000 trans mit ter is in ex cess of 100,000 ohms and can be ig- nored in the cable length calculations.

13.4HART® Communication Distance

Up to 1.5 km (1 mile) when using multiple twisted pair cables. Communication distance varies depending on type of cable used.

Use the following formula to determine cable length for specific applications:

L =

65 × 106

−

(Cf + 10000)

(R × C)

C

 

 

Where:

L = Length in Meters or Feet

R = Resistance in Ohms (Ω ) including barrier resistance.

C = Cable capacitance in pF/m or pF/ft

Cf = Maximum shunt capacitance of receiving devices in pF/m or pF/ft.

13.5 Power Supply Requirements

To minimize signal degradation of the HART® communication signals, the following power supply specifications are required.

•Voltage: . . . . . . . . . . . . . . . . . . . . . . . 24 V DC (typical)

•Max i mum rip ple (47 to 125 Hz): . . . . . . . . . . 0.2 V (peak to peak)

•Max i mum noise (500 Hz to 10 kHz): . . . . . . . . 1.2 mV

•Max i mum se ries im ped ance (500 Hz to 10 kHz):. . 10 ohms

Brandt Instruments, Inc.

MST2000 Multivariable SMARTFLOW ® Transmitter

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Tamron MST2000 operation manual Hart Communication Distance, Power Supply Requirements
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MST2000 specifications

The Tamron MST2000 is a groundbreaking optical device that showcases the company's commitment to innovation and quality in the world of photography and imaging. Designed for both professional photographers and enthusiastic hobbyists, the MST2000 delivers exceptional image quality, versatility, and ease of use.

One of the standout features of the Tamron MST2000 is its superior optical design. It incorporates advanced lens element configurations that minimize aberrations and distortion, ensuring sharp and vibrant images across the entire frame. The lens construction includes high-grade glass elements that enhance light transmission, resulting in crystal-clear images even in low-light conditions. This is particularly beneficial for night photography or indoor settings where lighting may be challenging.

The MST2000 also boasts an impressive zoom range, allowing photographers to capture a wide variety of subjects with ease, from breathtaking landscapes to intimate close-ups. Its robust zoom mechanism enables seamless transitions between focal lengths, helping users to adapt to different shooting environments quickly. The zoom is complemented by a fast and accurate autofocus system that ensures subjects are sharply focused, allowing photographers to capture fleeting moments with confidence.

In terms of build quality, the Tamron MST2000 is constructed with durability in mind. The lens features a weather-sealed body, making it resistant to moisture and dust. This design consideration allows photographers to shoot in diverse conditions without fear of damage, ensuring that the MST2000 is a reliable companion in any situation.

Another notable technology featured in the MST2000 is the vibration compensation system, which helps to reduce the effects of camera shake. This is particularly beneficial when shooting at slower shutter speeds or using longer focal lengths, allowing for clearer images without the need for a tripod.

For those who appreciate creative control, the MST2000 includes various customizable settings that enhance the user experience. Photographers can fine-tune parameters such as focus and aperture easily, providing them with the flexibility to achieve their desired artistic effects.

In summary, the Tamron MST2000 offers a sophisticated combination of advanced optical technologies, versatility, and user-friendly features. Whether capturing sweeping panoramas or intricate details, this lens is designed to meet the demands of today's photographers while inspiring creativity and exploration in every shot.
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