Habasit BTM-1, Operating Instructions Manual, Page: 9 / 20

Operating instructions – Belt tension meter BTM-1
Version 1.0
9
Checking calibration
Please follow the instructions below. This ensures that the device works
properly and avoids incorrect measurement results.
The Frequency test is an important and useful additional function for
checking the measurement probe.
During this "self-test", the Belt Tension Meter display generates a nominal
frequency of 25 Hz using the display backlight. That is, the illumination of the
display is switched off and on at a frequency of 25 Hz. If it is functioning
properly, the measurement probe must readout this 25 Hz in the display. The
readout can vary in the range from 24.7 Hz to 25.3 Hz.
1. Switch on the Belt Tension Meter using the
button.
2. Switch to the "Freq-Test" using ; see "Menu structure", p. 18.
3. Activate the frequency test using ; the display begins to "flicker" at a
nominal frequency of 25 Hz.
4. Hold the measurement probe up close to the display.
5. The measurement probe measures the display frequency; the result is
indicated in the display and an acoustic signal is generated if the
measurement is successful.
6. Switch off the frequency test by using ; switch back to the
measurement mode using .
Note
If the result deviates from the nominal value of 25 Hz (readout
in display: 24.7 – 25.3 Hz), then check the cables as well as
the battery voltage.
If in doubt, contact Habasit Technical Support.