• Both the μRS1000 and μRS1800 lines include 4-pen models to handle a broad range of applications.
• Dot-printing models are fast - up to 6 points in 10 seconds for μRS1000, and 24 points in 30 seconds for μRS1800, giving high-quality analog recordings.

Holding the MENU key for three seconds switches the recorder from the normal Operation Mode to Set Mode, simplifying operation and setting entry. Manual printout and list printout are done in Operation Mode, while settings such as alarm values and chart speed are entered in Set Mode.

• The use of high-voltage solid-state scanner relays, brushless DC servo motors and ultrasonic pen position transducers that work with no moving contacts allow the highest possible reliability.
• Low power consumption thanks to the use of ASICs to achieve high quality integrated circuit designs.
• Splash and dust-proof door permits use even in poor environments. (Based on DIN 40050-IP54).

Moving sprocket technology is provided for smooth chart feed. Moving sprocket eliminates the problem of misfeed due to temperature and humidity changes.

Each input and output terminal block can be removed conveniently when wiring. Connector mating surfaces are gold-plated for high corrosion resistance.

Simple operating panels consist of an anolog scale plate and a digital display. An anolog scale plate for each input channel is standard equipment. For (PDF) info on the digital display option, click here.

Click here for examples of Recording/Printing

Dot-printing μRS1000/μRS1800 models scan their input with Yokogawa-developed semiconductor relays that combine voltage output photocouplers with high-voltage MOSFET's that stand off 1500 V DC with less than 3 nA leakage. The result is fast scanning with virtually infinite life and no annoying noise. High-voltage N-channel MOSFET's Q1 and Q2 are controlled by the photocoupler outputs applied between their gate and source terminals. Drive currents through the photocoupler input LED's generate voltage across the serially-connected photovoltaic arrays at their outputs, more than enough to reach the MOSFET threshold voltages and control the on-off switching of Q1 and Q2 as required.

High breakdown voltage solid-state relay

• Ultrasonic pen position sensing : no slide wire contacts
  Pen position is sensed from the propagation time of an ultrasonic pulse imparted to a magnetostrictive strip by a piezoelectric transducer. This totally eliminates the sliding mechanical contacts and slide wear that limit the life of conventional potentiometers. What's more, ultrasound velocity variation with temperature is cancelled by a offset calculation for highly accurate positioning.

Ultrasonic pen position transducer

Fitting four pens into the μRS1000/ μRS1800's DIN case size demanded an ultrathin motor to meet the physical constraints. Rising to the challenge,Yokogawa developed a motor a mere 11.5 mm thick and eliminated moving contacts with a brushless design. In conventional DC motors where the coils spin with the rotor, a commutator and sliding brushes are needed to supply current to the coils. Sliding continuously over the commutator surface, the brushes are subject to severe mechanical wear and become the major factor limiting motor life.
In a brushless motor, in contrast, the magnets turn, the coils are fixed, and electronics do the coil current switching, eliminating the commutator and brush wear that limits life. In a brushless motor, in contrast, the magnets turn, the coils are fixed, and electronics do the coil current switching, eliminating the commutator and brush wear that limits life.

Construction of the servo module

By integrating the circuitry with ASIC (Application Specific Integrated Circuits) technology, Yokogawa has slashed both parts count and power consumption. For example, the programmable gain amplifier and A to D converter are now combined in one chip (=A-DLSI) . Furthermore, the servo integrated circuit has been converted into one chip as well. With this low-power circuit technology fewer parts are left to fail, and their low heat generation offers even more reliability.

Thanks to high integration, all models -μRS1000/μRS1800 - feature a case only 220 mm deep. And they are light-weight as well, only3.7kg for μRS1000 (4-pen model), and 9.2 kg for the μRS1800 (4-pen model).

Ink bleed along the chart folds at slow writing speeds was always a problem with Z-fold chart pen recorders. In the μRS1000/μRS1800 a precision slot along the platen under the folds eliminates this problem.

The recorder front door based on DIN 40050-IP54 standards in panel-mount installations.