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  4. Bus controller 7900 (Fluke Calibration)
Bus controller 7900-7900-B
Bus controller 7900-Fluke Calibration

Bus controller 7900
Fluke Calibration

About This Product

■Features

・All functions of Fluke Calibration's 2100 controller ・Easy to install ・Two independent overtemperature cutout circuits Fluke Calibration bass controllers have long been recognized as some of the best bass controllers in the world. These bus controllers are the most popular retrofit controllers in the industry and are now available on Rosemount buses. The Model 7900 Controller is easy to install and can be used in place of the Rosemount Model 915 on all Rosemount bus models. This controller uses the same circuitry as Fluke Calibration's 2100 controller and provides long-term stability of better than ± 0.003°C. Special noise reduction techniques allow the 7900 to measure even the minute resistance changes required for this level of stability. Temperature EMFs are removed by using an AC bridge within the controller. Precision custom resistors improve short- and long-term stability. In addition, advanced filtering technology removes line noise that tends to cause problems. The Model 7900 contains special circuitry that monitors the controller's microprocessor and automatically resets the microprocessor if its operation is interrupted. It also includes two separate cutout systems to maintain bath temperatures within normal range. Software cutouts use adjustable high temperature limits. This limit is easily controlled from the front panel and can be set to match the bath fluid requirements. If the control sensor measures a temperature above this limit, heating will be stopped. When the bath temperature drops below the normal operating range, heating begins and LN 2 cooling stops. Another separate hardware cutout monitors the bath temperature with a thermocouple and shuts off all heating and LN 2 cooling when the bath temperature exceeds that range.

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    Bus controller 7900

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1 Models of Bus controller 7900

Image Part Number Price (excluding tax) Weight Installation Temperature control range Dimensions (width x height x depth) Rated current Stability Time to stability Operating voltage Operating temperature Heating control Control sensor Cooling control Memory Programmable soak time Firmware high temperature cutout Hardware high temperature cutouts Display accuracy Optional range Interface
Bus controller 7900-Part Number-7900-B

7900-B

Available upon quote

4kg

Free-standing or rack-mountable with optional hardware

–100℃ ~ 400℃

311 × 114 × 279 mm
(12.25 × 4.5 × 11 in)

Up to 20 amps

± 0.003 (standard value ± 0.001)

Half an hour

115VAC (±10%), 60Hz

5℃~50℃

2 points, firmware or user control

100Ω PRT,
alpha = 0.00385

LN 2 (automatic)

Non-volatile, 8 programmable set points, each with ramp and soak functions

1 ~ 500 minutes

Valid, volatile, programmable (independent from controller)

Thermocouple control

±1℃

None

RS-232 and IEEE standards

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Fluke Calibration

  • Japan

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