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4. operation
4.1.
BatterY
the battery cover is on the back of the unit. remove the screw at the base of the battery cover and lift off the cover. connect the supplied
PP3 battery and place it into the compartment. replace the cover and secure it with the screw.
4.2.
meaSurement Selection
there are two measurement groups to choose from as shown below:
4.2.1.
group one
4.2.2.
group tWo
4.2.3.
Press the meAs button once to turn the unit on. to switch from one measurement group to the other hold down the mode button for
three seconds. the display will alternate between rPm (Group one) and reV (Group two). release the button when the display shows
the group you require. Press the mode button repeatedly to cycle through the options in each group (as shown overleaf) until you reach
the required measurement.
4.3.
non-contact meaSurement
4.3.1.
in order to do a non-contact measurement the rotating object must have a segment of reflective, self adhesive tape attached to it. the
tape should be attached as close to the outer edge of the object as possible. cut a 1/2" square from the tape provided and apply to the
object.
4.3.2.
to obtain an accurate reading the non-reflective area must always be greater than the reflective area.
4.3.3.
if the whole object, such as a shaft, is normally reflective it must be covered in black tape or painted black before the reflective tape is
applied.
4.3.4.
When measuring very low rpm it may be necessary to apply several reflective marks equally around the circumference of the object.
When a reading is taken it should then be divided by the number of reflective marks in order to get a true reading.
4.3.5.
to take a reading. Hold the unit about 6" (15cm) from the rotating object. Press and hold the meAs button and direct the red spot of
the laser beam onto the rotating object in the area where the self adhesive tape was applied. After about 4 seconds the scanning symbol
will be shown at the top of the display (see fig.3) and a reading will appear in accordance with the units of measurement previously selected.
to store the value(s) press the mem button once whilst the meAs button is still held down. for more information refer to 4.5 dAtA storAGe
and 4.6 dAtA recAll.
4.4.
contact meaSurement
4.4.1.
screw the contact adaptor into the front aperture of the tachometer as shown in fig.2-A.
4.4.2.
choose one of the contact drivers shown in fig.2-B and push it onto the adaptor shaft ensuring that the slots in the driver pass over the
drive pin in the end of the adaptor shaft.
4.4.3.
Before using the tachometer in a contact situation do a risk assessment in the area you will be working in to ensure that you will not
inadvertently come into contact with any other moving parts whilst taking the reading you require.
4.4.4.
to take a reading. Press and hold down the meAs button and bring the rubber part of the driver gently into contact with
the moving object. After about 4 seconds the scanning symbol will be shown at the top of the display (see fig.3) and a reading will appear in
accordance with the units of measurement previously selected. to store the value(s) press the mem button once whilst the meAs button is still
held down.
fig.2
4.5.
data Storage
4.5.1.
to store the value(s) shown on display press the mem button once whilst the meAs button is still held down.
4.5.2.
the reading will be stored in one of ten data set locations. one data set consists of a mAX data figure, a min data figure, and an
AVerAGe data figure. only measurements that can vary (such as rPm) will record as a set. non variable measurements such as reV
will only record as a single figure. see fig.4.
4.5.3.
once data set '0' has been used the system will automatically advance to the next available memory location. When all ten
locations are full (0 to 9), new sets of data will begin to overwrite the original readings.
© Jack sealey limited
rPm
non-contact revolutions per minute
rpm
contact revolutions per minute
HZ
contact frequency
m/m
contact meters per minute
i/m
contact inches per minute
f/m
contact feet per minute
Y/m
contact yards per minute
reV
revolutions
m
length in meters
in
length in inches
ft
length in feet
Yd
length in yards
fig.3
Original Language Version
fig.4
tA050
issue 5 (H,3,4,f) 02/03/18
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