Logitech Electronics 2000 MKII Series User Manual
Tachometers
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Summary of Contents for Logitech Electronics 2000 MKII Series
- Page 1 2000 ™ MKII SERIES Tachometers Model 2000V User Guide...
- Page 2 Addendum to 2000 S Tachometer User's Guide ERIES 2000V is a variation on the standard 2000T tachometer. It measures the time between pulses generated by an object passing between two sensors and from this calculates the velocity of the object. The two pulses are usually applied to input A (I/P a ) and input B (I/P b ) - terminals 10 and 12 on the rear of the instrument, although it is possible to combine the two signals and apply them to input A only.
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Page 3: Table Of Contents
Contents Specification ..........4 General description . -
Page 4: Specification
Specification Display 6 decade and sign 7-segment red LED, 10mm high Decimal point Programmable from front panel Scaling Programmable via front panel, retained in non-volatile memory. Signal inputs (A and B) Standard Standard sensitivity 180mV to 10V — protected to 100V Frequency 30kHz maximum with single input, or 15kHz maximum with dual inputs Impedance... -
Page 5: General Description
General Description 2000T ™ Tachometers are 6-decade seven segment high brightness red LED display MKII SERIES instruments based on the industry standard 8051 series architecture microprocessor. They are built into half DIN (96 mm x 48 mm) panel mounting housings and can be supplied to operate on 115V or 230V AC or 24V DC power supplies (see Transformer Connections on page 6). -
Page 6: Safety Information For Eu Users
Safety Information for EU Users WARNING This instrument must be earthed when powered from a mains supply (see also Mains Earth on page 9). Refer to the rating label for the pre-set voltage and ensure that the instrument voltage corresponds to the intended supply voltage. Important: The wires in the power lead fitted to mains instruments are coloured in accordance with the following code: Green... -
Page 7: Switches And Connections
Switches and Connections RUN/SET Switch This switch is located in the top right hand corner of the front panel. RUN mode. When the instrument is in this mode the Tachometer will display the measured signal. Pressing this switch changes the Tachometer to the SET mode and activates the DP, the 0–9 and the + (polarity) switches (see Setting a Scaling Factor on page 10). -
Page 8: Switches
0–9 Switch Located under each decade, these switches are used to set the value of all programmable parameters. Each depression increments the display one digit. Holding the switch depressed steps the display through at a pre-determined rate. +/- Switch Located at the lower left hand corner of the front panel, this switch selects negative values when required by displaying a negative sign. -
Page 9: Sensitivity Control
Sensitivity Control This is located to the right of the terminal block on the rear panel and is factory preset. However, should it be necessary during on-site installation, adjustment is accessible through a hole in the rear panel itself. Maximum sensitivity is obtained when the control is turned fully clockwise. It is recommended that the sensitivity level is increased only as far as necessary to obtain a steady signal. -
Page 10: Programming The Instrument
Programming the Instrument Calculating a Scaling Factor The displayed value is calculated as D = Sr where S is the scaling factor and r is the measured rate of input signal in pulses per second (pps) or Hertz (Hz). The scaling factor is most easily calculated by considering the maximum input frequency expected and by deciding what the display should read at this frequency. -
Page 11: Altering Programming On An Instrument That Has Been Previously Scaled
On an Instrument that has been previously programmed If an instrument has been supplied with factory programmed settings as requested, or once the user has programmed the settings and returned the instrument to the RUN mode, on power up the display will show the programmed mode for one second: FREQ A FREQ B... -
Page 12: Setting An Offset
Setting an Offset The Tachometer has an OFFSET facility that can be either positive or negative. It is a very useful addition to the scaling factor and can be used to display percentage difference between A and B, or show the deviation from a nominal value. For example: If the nominal frequency on Input A is 1000 Hz, by setting the scaling factor to 1 and the OFFSET to -1000, the display will show the deviation from 1000 Hz. - Page 13 The REF will probably be zero but it can be set to the lowest value normally expected. The Full Scale (FS) value will depend on the Analogue Output Module specified when the instrument is ordered, the application and the range of display readings expected. Note: The outputs are not affected when the Tachometer is operating in the RUN mode and the operator uses the Function (FUNC) switch to check the parameters that have been set in 1 to 6 above.
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Page 14: Diagrams
Diagrams Front Panel Layout Note: On instruments with the SINGLE switch set option only the FUNC switch is accessible unless the bezel and front panel are removed Rear panel layout Sensitivity Control 2000V- _hb v. 1.1 01/2020 ! 1 4 MKII... -
Page 15: Connection Diagrams - Typical Applications
Connection diagrams – typical applications Variable reluctance Magnetic Pick-ups Single-input operation Dual-input operation 2000V- _hb v. 1.1 01/2020 ! 1 5 MKII... - Page 16 Electronic Sensors and Rotary Encoders Photo-electric sensor or Proximity probe Digitising encoder (shown with optional Measuring Wheel) 2000V- _hb v. 1.1 01/2020 ! 1 6 MKII...
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Page 17: Alarm Output Connections
Alarm Output Connections Alarm connections with external power supply 2000V- _hb v. 1.1 01/2020 ! 1 7 MKII... -
Page 18: Additional Information
Additional Information Electromagnetic Precautions Logitech have designed in a great deal of noise immunity into the product in accordance with EN5001-2 and EN5002-2 (radiated emissions, conducted emissions, ESD, radiated susceptibility and fast burst transient testing) However it is still vital to use good EMC (Electromagnetic Compatibility) techniques on installation of both this and other associated electronic equipment and sensors in order to ensure reliable operation. -
Page 19: Warranty
Tachometers carry a two year warranty that is only valid where there is no MKII SERIES damage caused by accident, negligence, misapplication, or repairs/modifications attempted by unauthorised personnel. The warranty only extends to the original user. Copyright © Logitech Electronics Limited 1994 to 2017 Document No: 2000V- _hb v.3.0 July 2017...