Wilcoxon REF2500 Manual de usuario

Wilcoxon Sensing Technologies

8435 Progress Drive, Frederick, MD 21701, USA

Amphenol (Maryland) Inc. d/b/a Wilcoxon Sensing Technologies

97029 Rev C.1 09/18

Tel: +1 (301) 330-8811

Tel: +1 800 WILCOXON

Fax: +1 (301) 330-8873

www.wilcoxon.com

ReferenceMate portable reference source

REF2500 operation manual

97029 Rev C.1 09/18 Page 2 of 15

Caution: This guide should be read carefully before operating the unit.

Safety section

ReferenceMate handheld shakers can be used safely when the instructions in this manual are

carefully followed. This section summarizes the safety considerations. Reminders in the form

described below, will appear in the detailed instructionsto assure operator awareness of these

safety considerations. Qualified personnel should use the REF2500 only after becoming thoroughly

familiar with this manual.

WARNING: This symbolis used in the instruction manual when the safety of the operator

must be considered. The instruction manual should be consulted and read carefully.

CAUTION: This symbol is used when caution is needed to prevent damage to equipment.

It is used where careful attention to certain procedures described in the instruction manual

is needed. This symbol is also usedto emphasize procedures other than normal operating

procedures.

Safety summary

1. The products covered in this installation guide do not require any special precautions, protective

devices or equipment.

2. Because these products are designed to be used in an industrial environment, personnel

involved with the operation of this instrumentshouldbe familiar with all plant safety requirements

before beginning use.

3. The ReferenceMate is NOT certified for use in explosive or hazardous environments.

4. There are no user serviceable parts within this product.

5. Use common sense and avoid haste during operation.

97029 Rev C.1 09/18 Page 3 of 15

Contents

1.0 Introduction................................................................................. 4

2.0 Description ................................................................................. 4

3.0 Applicable models..................................................................... 4

4.0 Installation.................................................................................. 5

5.0 Operation.................................................................................... 6

5.1 Operation steps..................................................................... 6-7

5.2 Operational details................................................................ 8

5.2.1 Mounting.................................................................. 9

5.2.2 Power ON/OFF........................................................ 9

5.2.3 Frequency selection............................................... 10

5.2.4 RMS/PEAK............................................................... 10

5.2.5 BAT (low power) LED............................................. 11

5.2.6 OOR LED................................................................. 11

5.2.7Orientation during operation................................. 11

6.0 Testing triaxial transducers...................................................... 12

6.1 Universal AC adaptor ........................................................... 12

7.0 Reference test points................................................................. 13

7.1 Background information...................................................... 13

7.2 Recommended instrumentation setup............................... 14

7.3 Protection from the environment........................................ 15

8.0 Storage........................................................................................ 15

9.0 Technical assistance................................................................. 15

10.0 Customer service..................................................................... 15

97029 Rev C.1 09/18 Page 4 of 15

1.0 Introduction

Thisguide is designed to assist the user in the proper operation of the ReferenceMate portable

reference source(handheld shaker). Further information is provided onthe use of accessory items.

2.0 Description

The ReferenceMate portable vibration reference source enables users in the field to easily

verify sensor performance and the integrity of the cabling between the sensor and read-out

equipment, either online or portable units.

A built-in reference accelerometer assures that a 1 g test level is maintained for a unit under

test (sensor and mounting hardware) weighing up to 250 grams.

Frequency of operation and measurement types (peak/RMS) are selected with front panel push

buttons.

•61.4 Hz for imperial measurements, where 1 g is equal to 1 inch per second (ips), ideal for

use with velocity sensors

•100.0 Hz to confirm accelerometer performance at the same reference frequency used by

most manufacturers

•159.2 Hz for metric measurements, where 1 g is equal to 9.81 m/sec2and 9.81 mm/sec

A bottom mounted D-ring belt clip is included for hands-free transport between

locations when in the field. The belt clip can be removed and replaced with a 70 lbf

pull force magnet (optional) for attachment to metal structures for hands-free

operation.

LEDs notify the user when the battery condition falls below operational levels or if

the unit is overloaded. Reference test points are provided to test and check

calibration of the shaker’s internal accelerometer.

3.0 Applicable models

The manual covers the model REF2500 handheld shaker included in the REF2510 and REF2510R

kits, and the use of applicable accessories, both standard and optional.

97029 Rev C.1 09/18 Page 5 of 15

4.0 Set-up

The unit is powered by four AA alkaline batteries (provided with the unit). Rechargeable and lithium

batteries may also be used.

NOTE: Never mix battery types. For proper operation, use all alkaline, NiCad, etc. types.

When replacing batteries, always replace all four cells.

Access the battery compartment by unscrewing and removing the bottom cap (see figure 1A).

Remove the battery holder and insert four AAbatteries into the holder, being careful to observe

correct polarity (see figure 1B). After the batteries are installed, insert the holder into the battery cup

and gently snap the holder onto the contacts. Re-attach the bottom cap. The ReferenceMate is

now ready to operate.

The shaker does not contain a battery charging system. If rechargeable batteries are used, they

must be charged external to the shaker.

Figure 1A: ReferenceMate with bottom cap removed showing battery holder

Figure 1B: ReferenceMate with batteryholder removed from battery compartment

97029 Rev C.1 09/18 Page 6 of 15

5.0 Operation

Below are numbered steps to follow for operating the REF2500. Each step is described in detail in

section 5.2.

WARNING: the REF2500 is NOT certifiedfor use in hazardous environments.

5.1 Operating steps

Please refer to Figure 2 for details.

1. The ReferenceMate is provided with a mounting head that acceptsa 1/4-28mounting stud.

Attach the unit to be tested (UUT- accelerometer, piezovelocity sensor, etc) to the

ReferenceMate mounting platform making certain to only hand-tighten the accelerometer to no

more than 10 in-lb (112 N-cm). If the accelerometer has something other than a 1/4-28 mounting

thread, usethe appropriate adaptoroutlined inTable 2. The appropriate mounting torques for

adaptors used with the REF2500 are also shown in Table 2. An open end wrench is provided to

stabilize the shaker headand make certain the mounting platform (shaker head) is not

excessively torqued. Over torqueing the shaker head can result in permanent damage to the

shaker suspension system. To stabilize the shaker head during accelerometer attachment, slip

the open end of the wrench over the flats provided on the shaker head.

2. Once the UUT (and anymounting accessory) is mounted to the ReferenceMate head, connect

all cables from the UUT to the readout equipment. You are now ready to test your device.

3. Press the ON/OFF button to initiate the 1 g test cycle. The OOR indicator(out of range indicator)

will come on momentarily as the control circuit stabilizes to a 1 g test level. The shaker will shut

off after approximately 90 seconds.

a. Allow at least three seconds for the REF2500to achieve the controlled vibration level.

Observe the BAT and OOR LEDs and make sure they are not illuminated. If the BAT

indicator remainson, or if the unit will not stay on after releasing theON/OFF switch, replace

the batteries and try again. If the OOR LED illuminates, the maximum load has been

exceeded. The excessive weight must be removed, otherwise a 1 g test level will not be

achieved.

b. To defeat the auto shutoff feature and enable continuous operation, press and hold the

FREQ button while turning the unit on. Afterthe unit turns on, all three frequency LEDs will

brieflyilluminate to indicate the shaker is in CONTINUOUS operating mode. The

ReferenceMate will now continue to operate until the ON/OFF button is depressed again.

This feature may be useful when the ReferenceMate is connected to an AC supply, such as

in a laboratory environment. See Section 6.1.

When the unit is turned off, it will revert tothe AUTO-OFF mode.

97029 Rev C.1 09/18 Page 7 of 15

4. Once the REF2500 has been turned on and stabilized, a frequency LED and measurement type

LED will illuminate. They will indicate the choices made when the shaker was last turned off.To

change the frequency (61.4, 100.0 or 159.2 Hz), press and release the FREQ button. The

frequency LED will toggle through the above three choices each timethe FREQ button is

pressed. To change the measurement type, press and hold the FREQ button for approximately

5 seconds. Themeasurement type will toggle between RMS and Peak eachtime the FREQ

button is pressed and held this way.

5. To turn the ReferenceMate off before the end of itsautoshutdown cycle, Press theON/OFF

button.

Figure 2: control panel of the ReferenceMate

5.2 Operational details

Peak/RMS mode indicators

Indicate peak or RMS output

Peak/RMS mode selection

Hold down the FREQ button to choose

between peak and RMS output

Out-Of-Range indicator

Illuminates if the unit cannot maintain

1g acceleration due to overloading

Power

Press the ON/OFF button to turn the unit

on and off. The unit will power off after

90 seconds. To disable the auto-off

feature, hold down the FREQ button

while turning the unit on.

Low batteryindicator

Illuminates when battery

voltage is low and batteries

need to be replaced

Frequencyselection

Momentarily press the FREQ button

to selectthe desired frequency

Frequencyindicators

61.4, 100.0, 159.2 Hz

97029 Rev C.1 09/18 Page 8 of 15

Once the UUT has been mounted on the ReferenceMate and a 1 g test level has been achieved,

you can check the output of your sensor.

Table 1 shows the relationship between acceleration, velocity and displacement at the three test

frequencies. If taking imperial measurements (US) use Table 1a and select 61.4 Hz as your

frequency. 1 g (acceleration) at 61.4 Hz is equivalent to 1 in/sec(velocity). If Peak measurement

type is selected, both acceleration and velocity will be peak levels. Conversely, if RMS is the

measurement type, then both values will be in RMS.

The equivalent peak to peak displacement values in mils are shown in Table 1a for reference. For

those using themetric system,Table 1b shows theequivalent values. All thevalues below are

represented in Graph 1.

Table 1a: English (1 g) Table 1b: Metric (1 g = 9.81 m/s2)

Frequency

Velocity

Displacement

CPM

in/sec

mils, peak-peak

Peak mode

RMS mode

61.4

3684

1.00

5.18

7.34

100.0

6000

0.61

1.96

2.76

159.2

9552

0.39

0.77

1.09

Tables 1 and 2 show the relationships between 1g acceleration and their equivalent displacements and

velocities based on selected frequency

Graph 1: the relationships between 61.4 Hz, 100 Hz, and 159.2 Hz

Frequency

Velocity

Displacement

CPM

mm/sec

µm, rms

Peak mode

RMS mode

61.4

3684

25.41

46.5

65.9

100.0

6000

15.61

17.5

24.8

159.2

9552

9.81

6.9

9.8

97029 Rev C.1 09/18 Page 9 of 15

5.2.1 Mounting

The UUT can be attached directly to the shaker head using a 1/4-28 stud.

Adaptor studs and plates are available for mounting sensors with different size

mounting threads. See Table 2 below.

NOTE: The stud or adaptor plate should be mounted finger tight only, not

exceeding 10 in-lb (112 N-cm) into the shaker head. Exceeding the

maximum torque may damage the shaker. It is recommended to use the

open end wrench when mounting sensors to stabilize the shaker

armature.

Table 2: Recommended torque values for standard and optional accessories

Standard mounting accessory for REF2510 and REF2510R kits

Part

number

Description

Rec. torque

REF2510

REF2510R

in-lb

N-m

SF6

1/4-28 to 1/4-28 mounting stud

2.7



Optional mounting accessories

Part

number

Description

Rec. torque

REF001

REF002

in-lb

N-m

SF3

1/4-28 to 10-32 adaptor stud

24 (18)

2.7 (2.0)



13249-01

1/4-28 to 8-32 adaptor plate (997 and 712 sensors)

24 (20)

2.7 (2.3)



13249-02

1/4-28 to 10-32 adaptor plate

24 (18)

2.7 (2.0)



13267-01

90° adaptor plate (993 series sensors)

24 (24)

2.7 (2.7)



SF6M-1

1/4-28 to M6 adaptor stud

24 (30)

2.7 (3.4)



SF6M

1/4-28 to M8 adaptor stud

24 (40)

2.7 (4.5)



13249-03

1/4-28 to M4 adaptor plate (997 and 712 sensors)

24 (20)

2.7 (2.3)



13249-04

1/4-28 to M6 adaptor plate (captive screw sensors)

24 (30)

2.7 (3.4)



13249-05

1/4-28 to M8 adaptor plate (captive screw sensors)

24 (40)

2.7 (4.5)



A specially designed angular plate is available for calibrating the 993B-7-M12 triaxial

accelerometer. This plate will excite all three axes simultaneously resulting in 0.57 g per

axis. See section 6.0.

5.2.2 Power ON/OFF

Turns on the shaker for approximately 90 seconds. The unit will default to the previously selected

options. To defeat the auto shutoff feature and enable continuous operation, hold down the FREQ

button while turning the unit on. All three frequency LEDs will briefly illuminate to indicate the shaker

is in CONTINUOUS operating mode. The unit will now operate until the ON/OFF button is pressed

again. When the unit is turned off, it will revert to the AUTO-OFF mode.

97029 Rev C.1 09/18 Page 10 of 15

5.2.3 Frequency selection

The user has a choice of three frequencies. Momentarily press the FREQ button to select the

desiredfrequency as indicated on the respective LED. During frequency changes, the output of the

shaker is turned off momentarily. It is normal for the OOR indicator to illuminate briefly after a new

frequency is selected. See table 1 for additional information.

The ReferenceMate 2500 will always produce an amplitude of 1 g at the selected frequency.

61.4 Hz is the most common frequency selected for machinery vibration and analysis when

working with imperial units (US).One g at 61.4 Hz is equal to 1 in/sec (ips) velocity.

100 Hz is the preferredfrequency for checking accelerometer performance against calibration

data. 100 Hz is themost common reference frequency used by accelerometer manufacturers,

thus allowing for a comparison with the original calibration certificate.

159.2 Hz is the most common frequency used when working in metric units where 1 g is equal

to 9.81 m/sec2acceleration, 9.81mm/sec velocity and 9.8 µm displacement.

5.2.4 RMS/PEAK

Select between RMS and PEAK by holding down the FREQ button. Figure 3 below illustrates the

relationship between PEAK and RMS.

Figure 3: the relationship between peak, RMS, and peak-to-peak

RMS value = 0.707 x peak value

Peak value = 1.414 x RMS value

Peak to peak value = 2 x peak value

Peak to peak value = 2.828 x RMS value

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