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 time the
FREQ
button is
pressed. To change the measurement type, press and hold the
FREQ
button for approximately
5 seconds. The measurement type will toggle between RMS and Peak each time the
FREQ
button is pressed and held this way.
5. To turn the ReferenceMate off before the end of its autoshutdown cycle, Press the
ON/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 battery indicator
Illuminates when battery
voltage is low and batteries
need to be replaced
Frequency selection
Momentarily press the FREQ button
to select the desired frequency
Frequency indicators
61.4, 100.0, 159.2 Hz
