Velleman DVM8030 - Manual (Page 6)

DVM8030
V. 02 – 27/06/2013 6 ©Velleman nv
 Press the Func. button again to set the number of reflecting surfaces
the rotating device contains (e.g. when measuring the speed of a fan
with 5 reflective blades, set to 5). Use the
-button to increase the
value. Range from 1 ~ 9. After 9, value returns to 1. Press the Func.
button to exit.
Note: For a normal measurement with 1 reflective marker, the number
must be set to 1.

When the battery indicator [F] is shown, replace the batteries (see §9).
 Always place the sensor cover [1] back when the device is not in use.
7. Operation tips
 Do not measure outside of the operating range (‘OL’ is displayed on the
LCD) and do not measure in places with high humidity. Refer to the
technical specifications for more details.
 Make sure the device is at ambient temperature for accurate
measurements.
 Remove the batteries when the device is not used for a long time.
8. Maintenance
 Wipe the device regularly with a moist, lint-free cloth. Do not use
alcohol or solvents. DO NOT submerge the device in any liquid.
9. Batteries
 To replace the batteries, make sure the device is switched off.
 Open the battery cover at the back by sliding it downwards (away from
the sensor).
 Take out the old batteries and replace them with 3 new and identical
1.5V AAA batteries following the polarity markings inside the battery
compartment.
 Slide the battery cover back in place.
Do not puncture or throw batteries in fire. Dispose of batteries
in accordance with local regulations. Do not attempt to
recharge non-rechargeable batteries.
Keep batteries away from children.
10. Technical Specifications
LCD display 6 digits
parameters rpm, rps
measuring range 100~30000 rpm, 1.7~500 rps