63 76 482 D 3572
D 3572
.
031.01.04
.
02 12.2015
51
Sirona Dental Systems GmbH
9 Appendix
Installation Instructions Facescan
9.1 Checking the protective ground wires
båÖäáëÜ
2. Measure the voltage drop with the voltmeter, measure the current
with the ammeter, and calculate the resistance using the formula
R = U / I.
If the resistance value is greater than indicated in the adjacent
table, check whether the protective ground wires are fastened
according to the specifications.
Check whether plain washer, tooth lock washer and cable lug are
installed on the protective ground wire in the correct order and
whether the nuts of the protective ground wire connections are
firmly tightened.
If the fastening of the protective ground wires does not meet the
specifications, fasten the protective ground wires correctly.
Measurement table - Ground wire test
Measurement table
Measurement point A
A and G
Stand arm
≤ 0.2Ω
A and H
Image amplifier
chassis
≤ 0.2Ω
A
