DO6 Handbook
Jan 2006
22 of 107 pages
6.5.3.1 Handling inductive loads e.g. reactors, cables on reels, motors, coils, transformers
Safety instructions
•
The instrument has two measurement inputs connected in parallel; only one of these
inputs must be used at any one time. No leads must be plugged into the unused
connector for safety reasons. The unused circular socket must be covered with the cap
supplied.
•
Before starting any measurement make sure that the device under test does not carry an
external voltage (e.g. mains voltage, voltage generated by a rotating motor etc.).
•
Take care when handling inductive devices under test. By the physical nature of
inductive devices, life-threatening inductive voltages can be generated when the test
current is disconnected.
•
Dangerous induction voltages can occur if:
Ø
The connectors are removed from the socket
Ø
The test current (measuring range) is changed or switched off (STOP).
Ø
The leads break
Ø
The connections on the device under test are loose
Ø
The instrument is switched off during the measurement
Ø
The poser fails during the measurement
Ø
The test current changes for whatever reason
Ø
A fuse blows
•
An inductive device under test must not be connected or disconnected in the START
condition.
•
Always short-circuit the device under test before disconnecting.
Protection circuit / Discharge circuit
This is an instrument protection circuit. The constant current source is protected by a fuse, an
overvoltage arrester and other measures for protecting against external voltages. If external voltages
greater than 90 V are accidentally input into the instrument, the overvoltage arrester actuates, and the
10 A test-current fuse may blow. Before changing the fuse, make sure that no external voltages are
still applied to the instrument. Remove the mains lead and short-circuit the device under test. Always
replace the fuse with a fuse of the same type. Never select a fuse with a higher rated current or a
different time characteristic.
The instrument amplifier is also protected against external voltages. A replaceable fuse is not fitted
here.
Summary of Contents for DO6
Page 7: ...DO6 Handbook Jan 2006 7 of 107 pages 2 5 Block diagram...
Page 56: ...DO6 Handbook Jan 2006 56 of 107 pages 8 2 SPCI registers...
Page 100: ...DO6 Handbook Jan 2006 100 of 107 pages...
Page 101: ...DO6 Handbook Jan 2006 101 of 107 pages 8 16 2 Communication using Fast selection...
