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 certified for 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 accepts a 1/4-28 mounting 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, use the appropriate adaptor outlined in Table 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 head and 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 any mounting 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 REF2500 to achieve the controlled vibration level.
Observe the
BAT
and
OOR
LEDs and make sure they are not illuminated. If the
BAT
indicator remains on, or if the unit will not stay on after releasing the
ON/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. After the unit turns on, all three frequency LEDs will
briefly illuminate 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 to the AUTO-OFF mode.
