Elma Instruments VT-8204, Manual, Page: 37 / 40

Elma VT-8204 side 37
Tachometer measuring procedure
Change the function
1. Press the " Operation Button " ( 3-7, Fig. 1 ) continuously an not release the finger from the
button.
2. Press " Function Button " ( 3-5, Fig. 1 ) momentarily in sequence, the function will change to
Note :* After the function be selected, release the buttons, the function will saved into the
meter even turn off the meter.
* Turn on the meter again, the existing select function will present .
Photo RPM measurement
1. Select ( default ) the function to " Photo RPM ", refer chapter 5-1, page 20, 21.
2. Apply a " Reflecting Mark " to the object being measured. Press the " Operation button " ( 3-
7, Fig. 1 ) continuously and align the " Laser Light Beam " ( 3-16, Fig. 1) with the applied
target. Verify that the LCD " Monitor Indicator " ( ) lights when the target pass through the
light beam.
Measuring consideration :
If the measured RPM values is very low ( for example less than 50 RPM ), recommend to attach
more " Reflecting Marks " average to the object. It will get the real RPM with high resolution,
precisely & fast sampling time when divided the reading values by the no. of the " Marks ".
Contact RPM measurement
1. Select ( default ) the function to " Contact RPM ", refer chapter 5-1, page 20, 21.
2. Press the " Operation Button " ( 3-7, Fig. 1 ) & lightly pressing the " RPM Adapter
" ( 3-9, Fig. 1 ) against the center hole on the hole of the measured rotating axis.
Release the " Measuring Button " when the reading stabilizes ( approx. 2 sec. ).
Surface Speed Measurement
1. Select ( default ) the function to surface speed " m/min " or " ft/min ", refer chapter 5-1, page 5.
2. Press the " Operation button " ( 3-7, Fig. 1 ) and simply attaching the " Surface Speed Wheel "
( 3-8, Fig. 1 ) to the detector. Release the " Power Button " when the reading stabilizes (
approx. 2 sec. ).
Memory recall
1. The readout of " last value ", " max. value " & " min. value " can
be obtained immediately & memorized into the circuit
automatically after turning off the " Operation Button
" ( 3-7, Fig. 1 )
2. When finish the measuring procedures ( after release the
operation button ), the memorized values can be displayed on
the LCD display whenever :
a. First push the " REC button " ( 3-4, Fig. 1 ) - To display the last
value ( " LA " and " the last value " will be displayed alternately
).
b. Second, push the " REC button " again - To display the maximum value ( " UP " and " the max. value "
will be displayed alternately).
c. Third, push the " REC button " again - To display the minimum value ( " dn " and " the min. value " will
be displayed alternately ).