Chauvin Arnoux C.A 1725 User Manual
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Chauvin Arnoux C.A 1725 User Manual

Chauvin Arnoux C.A 1725 User Manual

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C.A 1725
TACHOMETER
C.A 1727
User's Manual
E N G L I S H
1 1

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Summary of Contents for Chauvin Arnoux C.A 1725

  • Page 1 C.A 1725 TACHOMETER C.A 1727 User's Manual E N G L I S H...

  • Page 2: Table Of Contents

    CONTENTS 1. INTRODUCTION ..............32 2. DESCRIPTION ................. 32 TACHOMETER ........................32 DISPLAY UNIT ........................35 3. USE ..................37 CONTACT-FREE MEASUREMENTS ..................37 MEASUREMENTS WITH CONTACT ..................37 MEASUREMENTS WITH EXTERNAL INPUT ................38 4. OPERATION ................40 MEASUREMENT UNITS ......................40 MIN/MAX RECORDING ......................

  • Page 3: Introduction

    1. INTRODUCTION C.A 1725 and C.A 1727 tachometers, specially designed for industrial applications, measure the speed of rotation of any moving part at a distance or by contact. CHAUVIN ARNOUX tachometers provide many possibilities in addition to the usual functions:...
  • Page 4 key on the C.A 1727 only : Programming. Initialize the program memory. key on the C.A 1727 only : Event counter. key on the C.A 1727 only : Program the scale factor : coefficient K. Manual or automatic change of range. Extend the measurement range at low frequency.

  • Page 6: Display Unit

    2.2 DISPLAY UNIT 1 Programming mode, on the C.A 1727 only. 2 Low threshold crossed, on the C.A 1727 only. 3 Full-scale coefficient K, on the C.A 1727 only. 4 Low threshold function, on the C.A 1727 only. 5 Memory write function, on the C.A 1727 only. 6 High threshold function, on the C.A 1727 only.

  • Page 8: Use

    3. USE 3.1 CONTACT-FREE MEASUREMENTS The contact-free measurement is made by the optical sensor built into the device. This sensor, placed in the front of the device, comprises a frequency-modulated infrared transmitter. Before making any measurement, it is necessary to prepare the revolving target of which the speed is to be determined.

  • Page 9: Measurements With External Input

    3.3 MEASUREMENTS WITH EXTERNAL INPUT The device has a 4-contact connector that can be used to connect an external source of which you wish to measure the speed, the frequency, the period, the duty cycle, etc. In order to inform the tachometer that the measurement is available on the external input, it is necessary to short-circuit contacts 1 and 4.
  • Page 10 Measurement frequency range from 1Hz to 10kHz from 0.1Hz to 10kHz in expanded range Functions available same as optical sensor Accuracy same as optical sensor ≥ 75kΩ Input impedance Balanced signals mode 300mV ± 90mV at 1kHz Thresholds 600mV ± 160mV at 10kHz Hysteresis 250mV ±...

  • Page 11: Operation

    100 = 60% 3 + 2 To make this measurement with the C.A 1725 or C.A 1727 tachometer, you must: 1) Check the amplitude of the input signal to the device. This serves to determine what threshold must be set. Here, the amplitude is greater than +1.1 V, so contacts 1 and 3 of the FRB connector must not be interconnected.

  • Page 12: Min/Max Recording

    Special functions : The following special functions are obtained when a key is kept pressed when the device is switched FUNCTION No key pressed Switched on for 5 minutes Switched on for an indefinite duration appears on the display unit Switched on without buzzer symbol does therefore not appear Initialization of all values contained in the program memory.

  • Page 13: Hold Of The Digital Value On The Display

    4.3 HOLD OF THE DIGITAL VALUE ON THE DISPLAY By a brief press on the HOLD key (when not in programming mode). Pressing HOLD freezes the digital display on the last measurement displayed; the bargraph continues to indicate the instantaneous measurement value. The display indicates HOLD. Pressing the HOLD key again restores the display of the instantaneous measurements, and HOLD disappears from the display unit.

  • Page 14: Smoothing Of The Measurement

    Application : When the tachometer is used in a place where it is difficult or impossible to read the display unit, the HOLD function can be used in conjunction with MIN/MAX recording to store the minimum and maximum values reached. 4.4 SMOOTHING OF THE MEASUREMENT Pressing the key starts the smoothing of the measurement (SMOOTH displayed).

  • Page 15: Counting (C.a1727 Only)

    4.6 COUNTING (C.A 1727 ONLY) Press the COUNT key to switch the device into the event counting mode. COUNT appears on the display unit and the measurement units are changed (see table below). Measurements mode COUNT mode tr/min rev (revolution) m/min m (metre) REV (revolution)

  • Page 16: Alarms (C.a 1727 Only)

    with SMOOTH The value recorded is then the smoothed value, when this function is displayed (SMOOTH). For the entire duration of recording of the information, the PRINT and COM symbols are displayed. When the Scanning function is programmed (see "Recording Interval"), pressing the starts the measurement recording cycle according to the interval programmed.

  • Page 17: Programming (C.a 1727 Only)

    4.9 PROGRAMMING (C.A 1727 ONLY) The device lets you program four values to define: - A low alarm threshold (LO AL). - A high alarm threshold (HI AL). - A multiplier coefficient (K). - A recording interval (SCAN). A press on the key switches the C.A 1727 into programming mode;...
  • Page 18 A/ Writing of a number without a decimal point: When the dashes are displayed, pressing a horizontal shift key replaces the dashes by zeros, by the value previously recorded, or by the extreme value possible compatible with the function. The value of the active digit (flashing) is incremented or decremented by pressing the key, respectively.
  • Page 19 To return the decimal point to the display unit, simply press the key, depending on whether the decimal point exited on the left or right, respectively. Because there are five possible positions of the decimal point, the resolution of the programming may be finer than the resolution of the measurement.
  • Page 20 The K symbol can be made to disappear only by reprogramming the original value of coefficient K (see the table below). The programming of K is limited to values between 99.999 and 0.010. No other values are accepted. Measurement Counting Original K K in tr/mn K in revolutions...

  • Page 21: Processing Of The Data On A Pc (C.a 1727 Only)

    Recording interval (C.A 1727 only) The scanning function is used to make measurements at a preset rhythm and automatically record the results. It is possible to store up to 4000 points. This function is programmed by pressing the key in PRGM mode. The SCAN symbol is displayed.

  • Page 22: Maintenance

    Example of menu on the screen of the PC : The help menu (?) 5. MAINTENANCE The tachometer requires no special maintenance other than changing the battery and cleaning the housing. - Adjustments The device has no internal adjustments. Measurement accuracy is ensured by a highly stable crystal oscillator.

  • Page 23: Characteristics

    - Repair For all repairs before or after expiry of warranty, please return the device to your distributor. - Warranty Our warranty is valid, except as otherwise expressly stipulated, for twelve months, counting from the date on which the equipment is made available (extract from our General Terms of Sale, communicated on request).

  • Page 24: Metrological Characteristics

    6.2 METROLOGICAL CHARACTERISTICS - Reference conditions Quantity of influence Reference conditions Tolerances Ambient temperature 23°C ± 3k Relative humidity 45% to 75% HR Ext. magnetic field < 40A/m to 50 or 60Hz Electric field < 1V/m to 50 or 60Hz Battery voltage ±...
  • Page 25 - Linear speed function Mechanical adapter with wheel 3.1813cm in diameter giving K = 0.1 for m/min and K = 0.328 for ft/ min. Range* m/min 0.60000 10.000 100.00 1000.0 10000 9.9999 99.999 999.99 9999.9 59999 Range ft/min 1.9680 10.000 100.00 1000.0 10000...

  • Page 26: Characteristics Of The Sensor

    - Duty cycle function Range % *9999.9 999.99 99.999 1000.0 100.00 10.000 Resolution 0.1% Accuracy 0.1% of full scale from 0.2Hz to 50Hz 1% of full scale 0.2% of full scale from 50Hz to 125Hz Frequency range 0.2 to 125Hz 1 to 125Hz 125 to 500Hz Measurement time...

  • Page 27: Characteristics Of The Adapter And Its End Fittings

    - optical sensor Transmission wavelength: 890 nm. Luminous power transmitted: depends on sighting distance ; at 1cm => 0,5mW/cm² at 50cm => 2mW/cm Minimum luminous power received: 10µW/cm2. Ratio of reflecting area to target area: > 5%. Detection distance: from 1 to 50cm. Sighting angle from the perpendicular to the target: 0°...

  • Page 28: To Order

    - Delivered in its carrying case with 1 FRB F connector, 1 9V battery, 1 set of 15 strips of retroreflecting film (length 0.1 m), 1 instruction manual on CD-ROM, and one Guide to getting started (printed). ACCESSORY OF THE C.A 1725 - Mechanical accessories kit ..................... P01174902 comprising 1 mechanical adapter, 1 calibrated wheel, 1 conical end fitting, 1 cylindrical end fitting.
  • Page 29 Tel: +86 21 65 21 51 96 - Fax: +86 21 65 21 61 07 SCANDINAVIA - CA Mätsystem AB USA - Chauvin Arnoux Inc - d.b.a AEMC Instruments Box 4501 - SE 18304 TÄBY 200 Foxborough Blvd. - Foxborough - MA 02035...

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C.a 1727

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