Siemens BTC-BR Manual descarregar pdf (Página 191)

Technical Product Manual

Fault analysis and repairs 1318

4 Checking and adjusting

Section 4: Checking and adjusting • Edition 12/2005

TU00-1318-0200302 © Siemens VDO Trading GmbH Section 4 4–23

4.9.1 Speed calibration adjustment (km/h, mph)

Set the speed coding switch to k = 8000 imp/km

(switches 2, 3 and 9).

Insert the tachograph chart(s) and close the unit cover.

Connect the unit to the electricity with connection wire "A" and connect wire

"B" to drive it on the test bench.

Increase the test bench drive rpm slowly and evenly until the end of the scale

is reached and turn it back slowly.

The speed indicator should follow evenly and without a noticeable delay.

Depending on the unit's nominal value, set speed adjustment 1 on the test

bench and adjust the unit display to the adjustment value using a potentiome-

ter (1).

Then set adjustment speed 2 on the test bench and adjust the unit display to

the adjustment value using a potentiometer (2).

Repeat the adjustment procedure until the adjustment values match.

4.9.2 RPM calibration adjustment (1/min, rev/min)

Procedure

Set the RPM coding switch to k = 4000 imp/1000 revolutions with switches 3,

4 and 10. (See Section 7, "Setting coding switches").

Insert the tachograph chart(s) and close the unit cover.

Connect the unit to the electricity and drive it on the test bench.

Increase the test bench drive rpm slowly and evenly until the end of the scale

is reached and turn it back slowly.

The rpm indicator should follow evenly and without a noticeable

delay.

Depending on the unit's nominal value, set speed adjustment 1 on the test

bench and adjust the unit display to the adjustment value using a potentiome-

ter (3).

Set adjustment rpm 2 on the test bench and adjust the unit display to the ad-

justment value using a potentiometer (4)

Repeat the adjustment procedure until the adjustment values match.

Remark

If on the STC the rpm drive can be read from the interface on the front the gear

ratio is i = 1:1. On the other hand if pulses are transmitted by an pulse genera-

tor that is fitted to the back of the STC the gear ratio is i = 1:2.

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Siemens BTC-BR Manual Página 191