Extech Instruments 461880 Bedienungsanleitung

User's Guide

Vibration Meter and Laser

Combination Tachometer

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461880 V2.2 8/09

Introduction

Congratulations on your purchase of the Extech 461880 Vibration Meter and

Combination Laser Tachometer. The 461880 Vibration functions have a frequency

sensitivity that meets ISO-2954, and measure Acceleration, Velocity and Displacement.

A 1000 point datalogger allows recording of data for download to a pc with included

software. The Tachometer functions provide contact RPM and Linear Surface Speed, as

well as non-contact RPM measurements. The 461880 is shipped fully tested and

calibrated and, with proper use and care, will provide years of reliable service.

Features

Vibration Function Features:

•Measures Acceleration from 0.5 to 199.9 m/s2 , 0.05 to 20.39 G or 2 to 656 ft/s2

•Measures Velocity from 0.5 to 199.9mm/s , 0.05 to 19.99 cm/s or 0.02 to 7.87

in/s

•Measures Displacement from 0.005 to 1.999 mm or 0.002 to 0.078 inches

•RMS measurements for Acceleration and Velocity

•Peak to Peak measurements for Displacement

•Peak function for Acceleration and Velocity

•Max Hold function for Acceleration (Peak), Velocity (Peak) and Displacement

(Peak to Peak)

•Frequency range from 10 Hz to 1 kHz meets ISO 2954 standards

•Zero function

•1000 point datalogger with adjustable sample rate

•Hold function freezes measured value on display

•MAX/MIN function to record máximum and mínimum measured values

•Auto Power-Off conserves battery power

•Separate vibration sensor with magnetic mount included

Tachometer Function Features:

•Photo and Contact Tachometer functions

•Laser light source with long measuring distance, up to 1.5 meters (4.9 feet)

•Wide measurement range from 0.5 to 100,000 RPM

•0.1 RPM resolution ,<1000 RPM, 1 RPM resolution ≥1000 RPM

•Memory function with recall saved MAX, Min and Last Reading values

•Microprocessor with crystal time base provides 0.05% accuracy

General Features:

•Large LCD display

•Low Battery indicator

•High Performance microprocessor based circuitry

•Compact Heavy Duty housing

•Hard Carrying case

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461880 V2.2 8/09

Meter Description

1. Meter Top (see Meter Top Callout below)

2. LCD display

3. Tachometer Function pushbutton

4. HOLD/ESCAPE pushbutton

5. Power pushbutton

6. ENTER/RECORD pushbutton

7. FUNCTION/SEND pushbutton

8. UNIT/LOGGER pushbutton

9. Contact Tachometer Surface Speed wheel

10. Contact Tachometer RPM adapter

11. Velocity Sensor and Magnetic Mount

12. Contact Tachometer Protective Cover

13. Access Screw for Protective Cover

Meter Top

1. BNC Connector

2. IR Temperature probe input (feature not supported)

3. RS232 Output Terminal

4. Photo Tachometer Laser Detector

5. Photo Tachometer Laser Light source

Meter LCD Display

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461880 V2.2 8/09

Vibration Meter Operation

Connecting Probe

1. Note that this meter accepts only the supplied vibration probe.

2. Plug the BNC connector end of the probe cable onto the BNC connector at the top of

the meter.

3. The probe can then be connected to the tested machinery in three ways:

a. Attach the magnetic end of the probe to a ferrous material on the equipment under

test.

b. Manually hold the probe in place against the equipment under test.

c. Unscrew the magnet from the probe end and use the threaded mount to connect to

a screw, bolt, or stud on the equipment under test.

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461880 V2.2 8/09

Powering the meter

1. Press the POWER key once to power the meter On. The meter will perform a short

self-test.

2. Press and hold the POWER key to power the unit Off. The unit will beep and display

OFF.

Selecting Units

1. The unit powers on in Acceleration mode and in the units last used.

2. Use the UNIT/LOGGER key to scroll through the other available functions/units.

3. To change displayed units (Metric or Imperial), press and hold the UNIT/LOGGER

key for 2 seconds.

RMS, PEAK, PEAK MAX HOLD, MAX HOLD

Press the FUNCTION/SEND key to select RMS, PEAK, or PEAK MAX HOLD (ACC and

VEL); or PEAK or PEAK MAX-HOLD (DISP).

1. RMS - Typical selection for vibration measurements. (PEAK to PEAK for

Displacement)

2. PEAK – For measurement of the peak value. Not available in the Displacement mode.

3. PEAK MAX HOLD – Holds and displays the maximum value. The display will update

only when a new maximum is measured. Not available in the Displacement mode.

4. MAX HOLD – Holds and displays the maximum Peak to Peak value. Available in

Displacement mode only.

5. To clear the MAX HOLD or PEAK MAX HOLD values, press the HOLD/ESCAPE key

for more than 2 seconds. This will zero the display and restart the MAX HOLD or

PEAK MAX HOLD function.

DATA HOLD

To freeze the LCD display, momentarily press the HOLD/ESC key. The HOLD icon will

appear on the upper right-hand corner of the LCD. Momentarily press the HOLD/ESC key

again to return to normal operation (the HOLD' hold icon will disappear).

MAX/MIN Record Function

1. Press the REC key to enter the MAX/MIN record mode. The REC icon will appear on

the display. Subsequent presses of the Record key will select the Max or MIN record

mode. Press and hold the RECORD key for more than 2 seconds.

2. To delete the MAX/MIN recorded values, press the HOLD button while the MAX/MIN

value to be erased is on the display. The value will be erased and the MAX or MIN

icon will disappear. The unit will remain in Record mode until the REC key is held for

more than 2 seconds.

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461880 V2.2 8/09

ZERO Adjustment Procedure

The meter may not indicate zero with no signal applied to the meter (no vibration).

Although this is usually not a problem, this procedure will bring the meter within a few digits

of zero and improve measurement precision.

1. Connect the vibration sensor to the meter.

2. Turn the meter on and set the function to ACC and RMS.

3. Make sure the vibration sensor is perfectly still (no vibration).

4. Press and hold the HOLD/ESC key for > 2 seconds to allow the display to reach the

zero value.

Advanced Vibration Functions

The Advanced Functions Menu allows adjustment for the Auto-Power Off feature and

Datalogging Sample Rate, as well as access to Memory status, and to Clear memory

1. Press and hold the HOLD/ESC key while powering the unit ON. Repeated presses of

the HOLD/ESC key will scroll through the available functions:

OFF – Auto-Power Off

SEC – Datalogger Sample Rate

Cnt – Number of data points available in memory

CLr – Clear Datalogger Memory

ESC – Exits the Advanced Functions Menu

2. Press the HOLD key to select the OFF function. Use the FUNCTION/SEND key or

UNIT/LOGGER key to toggle the setting between “0” and “1”. “0” disables the Auto-

Power Off function. “1” enables the function. Press the ENTER key to save the

setting.

3. Press the HOLD/ESC key to select the SEC function. Use the FUNCTION/SEND key

or UNIT/LOGGER key to scroll through the available sample rates: 1, 2, 10, 30, 60,

600, 1800, or 3600 seconds. Press the ENTER key to save the setting.

4. Press

the HOLD/ESC key to select the Cnt function. The display will flash the

available Memory points available in the datalogger.

5. Press the HOLD/ESC key to select the CLr function. Use the FUNCTION/SEND key

or UNIT/LOGGER key to toggle the setting between “0” and “1”. Select “1” to clear the

datalogger memory. Select “0” to retain the data in memory. Press the ENTER key to

execute.

6. Press the HOLD/ESC key to select the ESC function. Press the HOLD/ESC key

again to exit the Advanced Functions menu. The meter will power OFF.

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461880 V2.2 8/09

Tachometer Operation

Safety

WARNING: Do not directly view or direct the laser pointer at

an eye. Low power visible lasers do not normally present a

hazard, but may present some potential for hazard if viewed

directly for extended periods of time.

Reversible LCD Display

The meter display indicates Photo Tachometer measurements in one direction and

Contact measurements in the opposite direction. This permits the user to easily read the

measurement digits in both measurement modes with the meter held in either direction.

Selecting Function and Units

Press and hold the Tachometer Function pushbutton on the right side of the 461880.

Repeated presses of the FUNCTION/SEND key will scroll through the available modes:

RPM – Contact RPM measurement.

M/min – Surface speed - Meters per Minute measurement.

Ft/min – Surface Speed - Feet per Minute measurement.

RPM – Non-contact RPM measurement.

NON-CONTACT PHOTO TACHOMETER MEASUREMENTS

1. Apply an appropriately sized square piece of reflective tape to the surface of the

object under test.

2. With the meter OFF, point the laser pointer end of the meter toward the device under

test.

3. Press and hold the Tachometer Function Pushbutton (located on the right side of the

meter). Press the FUNCTION/SEND key to select the non contact RPM mode. Align

the laser pointer beam with the reflective tape.

4. Verify that the ((●)) Monitor Indicator appears on the LCD when the object under test

passes through the light beam.

5. If the measurement is under 50 RPM,apply additional squares of reflective tape.

Divide the reading shown on the display by the number of pieces of reflective tape

squares used to calculate the actual reading.

6. When the reading on the display stabilizes, note the reading.

NOTE: Bright ambient light may interfere with the reflected light beam. Shading the target

area may be necessary in some cases.

CAUTION: Rotating objects can be dangerous. Use extreme care.

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461880 V2.2 8/09

CONTACT TACHOMETER RPM MEASUREMENTS

1. Remove the Tachometer Protective Cover by loosening the screw and gently pulling

the cap away from the unit.

2. Install one of the RPM contact tips (stored inside the Tachometer Protective Cover)

on the contact shaft.

3. Press and hold the Tachometer Function Pushbutton (located on the right side of the

meter). Press the FUNCTION/SEND key to select the contact RPM mode.

4. Lightly press the contact tip against the center of a rotating shaft.

5. When the reading on the display stabilizes, note the reading.

CONTACT LINEAR SURFACE SPEED (ft/min or m/min) MEASUREMENTS

1. Remove the Tachometer Protective Cover by loosening the screw and gently pulling

the cap away from the unit.

2. Press and hold the Tachometer Function Pushbutton (located on the right side of the

meter). Press the FUNCTION/SEND key to select one of the linear speed modes

(M/min or ft/min).

3. Lightly press the linear speed wheel on the moving surface to be measured.

4. When the reading on the display stabilizes, note the reading.

RECALLING CONTACT TACHOMETER READINGS

To recall Contact Tachometer readings, press and hold the ENTER/REC key. Values are

displayed in 3 modes:

LA – Last reading displayed.

UP – Maximum value recorded

dn – Minimum value recorded

Repeatedly pressing and holding the ENTER/REC key will scroll through the 3 modes. The

value will flash, alternating between the mode indicator and value.

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461880 V2.2 8/09

Datalogging

The internal datalogger memory can hold up to 1000 readings. Readings can be logged

manually, with a button press, or automatically, at a programmed sample rate.

Sample Rate

The sample rate can be set to 0 (manual), 1, 2, 10, 30, 60, 600, 1800 or 3600 seconds.

See the Advanced Vibration Functions section for instructions on setting the sample rate.

Auto Data Logging

1. Set the desired sample rate as described (do not select ‘0’).

2. Turn the meter off and back on.

3. Press the REC button to enter the datalogging function. The REC symbol will appear

in the display (upper left-hand corner).

4. Press the LOGGER button to start logging data. ((●)) indicator will flash in time with

the selected sample rate.

5. Press the LOGGER button to pause/resume datalogging.

6. Press and Hold the REC button > 2 seconds to exit the datalogging mode.

Manual Data Logging

1. Set the sample rate to ‘0’ as described earlier.

2. Turn the meter off and back on.

3. Press the REC to enter the datalogging function. The REC symbol will appear in the

display flashing.

4. Press the LOGGER button.

5. Press LOGGER again to log one data point. The ((●)) indicator will flash and an

audible tone will sound. Repeat this step to store the desired number of readings.

6. Press and Hold the REC button > 2 seconds to exit the datalogging mode.

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461880 V2.2 8/09

PC Interface

The meter is equipped with an RS-232 serial data port (located at the top of the meter next

to the probe input jack). This interface was designed to operate with the optional Extech

407001A software package, which includes two programs and the required meter to pc

interface cable.

1. 407001A- Extech Data Acquisition Software: This software allows the user to connect

the meter to a PC and view readings in real-time as they are taken (this software

does not download the contents of the meter’s memory to the PC)

2. DL2005 - Datalogger Download Software: This software allows the user to download

the contents of the meter’s memory to the PC

Download Stored Data to PC (requires DL2005 software)

The SEND button is used to send the contents of the meter’s internal datalogger memory

to the PC via the optional DL2005 software.

1. Connect the RS-232 cable to the PC

2. Install and run the DL2005 data logging software.

3. Press and hold the SEND button for > 2 seconds. “r-232” will flash repeatedly in the

display.

4. In the DL2005 software, press START.

5. Press the SEND button again and the data will be sent to the meter’s RS-232 port

and onto the connected PC.

6. Press the ESC button to return to normal operation.

Specifications

Display Dual Display Multi-function LCD

Sampling Time Approximately 1 second

Datalogger memory 1000 point memory

Datalogger Sample Time 0 (manual), 1, 2, 10, 30, 60, 600, 1800 and 3600 sec.

Over range indication "OL" appears on the LCD

Open input indication "0" appears on the LCD

Low battery indication Battery symbol appears on the LCD

Power supply 4 x 1.5V AA Batteries

Power Consumption Vibration: approximately 10.5 mA

Tachometer: approximately 21 mA

Auto-Power Off On/Off selectable

Operating Temperature 32 to 122oF (0 to 50oC)

Operating Humidity less than 80% RH

Storage Temperature 14 to 140oF (-10 to 60oC)

Storage Humidity 10 to 80% RH

Dimensions Meter: 7.4 x3.0x1.8" (188x75.5x46.8mm)

Probe: 18 mm diameter, 40 mm height

Weight Meter: 0.87 lbs (397g)

Probe: 0.24 lbs (110g)

Complies with: FDA 21 CFR 1040.10 and 1040.11, IEC 60825-1 (2001-08)

Edition 1.2, EN 60825-1:1994/A2:2001/A1:2002

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