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Metrix HI-913 Installation Manual

Hardy shaker
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HI-913 HARDY SHAKER
Installation Manual
1. OVERVIEW
The Metrix Model HI-913 Portable Shaker
Table provides a field-tested method
for on-the-spot dynamic verification of
accelerometers, velocity pickups and non-
contact displacement transducers. Optional
mounting fixtures and hardware needed to
connect transducers to the HI-913 mounting
platform are available upon request. A closed-
loop control algorithm provides enhanced
stability and accuracy of frequency and
amplitude levels.
DOC# 100929 • REV D (Jan 2018)
The HI-913 incorporates a built-in sine wave
oscillator, power amplifier, electrodynamic
shaker, NIST-traceable reference
accelerometer and digital display. The HI-913
is completely self-contained and operates on
battery or AC power.
The built-in reference accelerometer
is attached permanently to the shaker
armature, maximizing the accuracy between
the reference accelerometer and the test
transducer. The HI-913 is designed to provide
long-term reliable performance over the
frequency range of 7 Hz to 10 kHz. The HI-
913 can be used for a variety of applications
that include:
•Verification and calibration of vibration
transducers and related test systems
•Verification of connector and cabling
integrity
•Confirm machine vibration alarm trip points
are set properly and ensure end-to-end
functionality of vibration monitoring systems
Notes
•Loads of up to 800 grams (28.3 ounces) can
be mounted directly to the HI-913 mounting
platform. Larger loads may be applied to the
platform, however, if prolonged testing of a
heavy load is planned, we recommend using
an external transducer suspension system.
Under these conditions the vibration wave-
form should be viewed on the oscilloscope
to aid in positioning the test transducer and
platform to reduce distortion that can occur
with very heavy weights.

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Summary of Contents for Metrix HI-913

  • Page 1 HI-913 HARDY SHAKER Installation Manual The HI-913 incorporates a built-in sine wave oscillator, power amplifier, electrodynamic shaker, NIST-traceable reference accelerometer and digital display. The HI-913 is completely self-contained and operates on battery or AC power. The built-in reference accelerometer is attached permanently to the shaker...
  • Page 2 •The HI-913 should always be operated on a stable, flat surface. •The HI-913 is designed for field test applications but care must be taken to maintain the integrity of the mounting platform assembly. •Hearing protection recommended when operating the HI-913 for an extended amount of time.
  • Page 3: Basic Operation

    Test Set-Up 1. Mount your sensor to the HI-913 mounting platform. • The HI-913 sensor mounting platform is threaded for a ¼-28 stud. Select an appropriate adaptor for mounting the sensor. • While tightening the sensor, secure the HI-913 mounting platform with the supplied wrench to prevent damage to the shaker from torque.
  • Page 4 Completing the Test 4. Verify that the level indicated on the HI-913 is the same as the level being shown on the readout of the sensor under test. 5. Before powering the unit OFF, reduce the vibration amplitude. The HI-913 retains the settings used prior to shutdown when it is powered back ON.
  • Page 5 Contact Metrix for ordering and installation information. The operation of model HI-913 does not change if the HI-913-LF5 option is ordered. The minimum low frequency response will be 5 Hz instead of 7 Hz. Allow for extra time for the shaker and sensor under test to settle when testing at slow speeds.
  • Page 6 Peak (pk) bases calculations on the highest value of the signal generated during testing. For a sinusoidal wave (as is produced by the HI-913), the peak value is calculated by RMS*√2. The HI-913 does not measure a true peak value, but instead estimates the value mathematically based upon the RMS value.
  • Page 7 External Source Input As an option, it is possible to drive the HI-913 by using an external signal source or a function generator. First, connect a signal source to the External Source BNC Input located on the top right corner of the unit. To enable the EXTERNAL SOURCE IN input, press the FREQUENCY dial to enter the “Calibration Options”...
  • Page 8: Theory Of Operation

    ® integrated into the mounting platform. A calibration “standard” maintained by Metrix is used to calibrate the HI-913 as a complete system and provides NIST traceability. The power amplifier is specially designed to provide the current required to drive the electrodynamic shaker.
  • Page 9 RMS 3.2 Battery and Charger The Model HI-913 can be operated from AC line power or from its internal rechargeable battery. When the external power supply is connected, it becomes the primary power source, operating the unit while simultaneously charging the battery.
  • Page 10: Specifications And Performance

    The HI-913 calibrators continuously monitor the state of battery charge during operation, storage and charging. During operation, if the battery capacity falls near minimum, the unit will shut off after approximately 2 minutes of inactivity rather than the usual 20 minutes. During storage, if the battery voltage falls near the minimum, the unit will go into deep sleep, requiring connection of AC power and reset of time and date before resumption of operation.
  • Page 11 8.5 in x 12 in x 10 in 22 cm x 30.5 cm x 28 cm Weight 18 pounds 8.2 kg Sensor Mounting ¼ - 28 Platform Thread Size Doc# - RevD Page 11 of 21 100929 • HI-913-Shaker • January 2018...
  • Page 12 This is a safeguard against side loading the shaker. In some cases of extremely heavy shaker payloads at high vibration levels (depending on the frequency), the HI-913 may exhibit both frequency and amplitude instabilities. In this case, please reduce the excitation amplitude and/or the payload to eliminate the effect.
  • Page 13 Doc# - RevD Page 13 of 21 100929 • HI-913-Shaker • January 2018...
  • Page 14: Recommended Practices

    HI-913 should be evaluated further to determine the root cause of the discrepancy. Field repair of the HI-913 is not possible, so if performance of the HI-913 is out of specification, it should be sent back to Metrix, Inc. for evaluation, repair and recalibration.
  • Page 15 • 10, 20, 50, 60, 100, 200, 500, 1000, 2000, 5000 and 10000 Hz Model HI-913 is not capable of 61.44 Hz, only integer numbers such as 61 or 62. For accelerometers the recommended amplitudes in API 670 are: •...
  • Page 16 Tip: magnetically mounting sensors greatly reduces high frequency response. A ferrous magnet target, mounting pad, is included with the HI-913. One can install this pad on the shaker and mount accelerometers magnetically. Always rock the sensor in place as one would on the machine.
  • Page 17 Remove the (2) 10-32 pan head screws on the user panel of the portable shaker table (white arrows in picture below). Install the AISI 4140 steel target into the shaker on the mounting platform. Doc# - RevD Page 17 of 21 100929 • HI-913-Shaker • January 2018...
  • Page 18 Non-contact displacement sensors come in various lengths so adjustability has been designed into the assembly. Attach selected spacer or spacers using setscrews provided, leaving threaded holes exposed. Doc# - RevD Page 18 of 21 100929 • HI-913-Shaker • January 2018...
  • Page 19 4. Finalize the assembly by attaching probe bar, microarm, non-contact displacement sensor, and micrometer on top of the spacers and secure with provided panel screws. Doc# - RevD Page 19 of 21 100929 • HI-913-Shaker • January 2018...
  • Page 20 Proximity Probe Dynamic Linearity Calibration & Confirmation of Vibration Alarms IMPORTANT: The HI-913 powers up at the unit’s previous frequency and amplitude settings. Prior to using the HI-913 for calibrating non-contact displacement sensors, set amplitude to a low level to avoid striking the tip of the probe with the target due to previously set large displacements.
  • Page 21 • Next, divide the voltage measurement by the amplitude displayed on HI-913. This will calculate the sensitivity of the probe. Example continued from above: divide 998 mV by 5.0 mils peak-to-peak to get 199.6 mV/mil (998 mV / 5.0 mils p-p = 199.6 mV/mil)