Instruction Sheet - 3B SCIENTIFIC PHYSICS U11375 Instructions D'utilisation

3B SCIENTIFIC ® PHYSICS

Instruction sheet

01/09 Hh
1. Safety instructions
The electrometer box has an extremely high
resistance at its voltage input, and can be damaged if
an excessive voltage is applied.
•
Do not exceed the maximum input voltage of ±8
V!
•
If necessary connect voltage-limiting components
to the input!
2. Description
The electrometer box is an impedance converter with
an extremely high input resistance for measuring very
small charges or currents.
It can be used in conjunction with the 3B NETlog
unit (U11300) for single manual measurements or
TM
with 3B NETlab (U11310) for recording and analysing
measurements.
The electrometer box is recognised automatically by
TM
the 3B NETlog unit..
3. Equipment supplied
1 Electrometer box
1 miniDIN 8-pin connecting lead, 600 mm long
1 Instruction sheet for U11375
Electrometer Box U11375
TM
1
4. Technical data
Input resistance:
Input capacitance:
Measurement error:
Overvoltage tolerance for non-hazardous
contact voltages:
Connectors:
5. Operation
•
Connect the electrometer box to an analog input
TM
of the 3B NETlog unit (input A or B).
•
Short-circuit the input and calibrate the offset so
that the output reading is zero.
•
Carry out the chosen experiment without delay so
that there is not time for stray charge to collect
on the input terminals.
•
Before starting a new experiment short-circuit the
input again.
11
> 10 ohms
< 50 pF
< 1.5%
1 kV (for low-
resistance sources)
10 kV (for high-resistance
sources)
4-mm safety sockets