3B Scientific Microvoltmeter (230 V, 50__60 Hz) - Manual (Page 4)

Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany • www.elwedidactic.com
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com
Subject to technical amendments.
© Copyright 2008 3B Scientific GmbH
2. Description
The microvoltmeter is used to measure and amplify
extremely low AC/DC voltages (max. 2
V), e.g.
thermo-electric voltages, induced voltages and
photo-voltages. The values are indicated by an LED
display. In addition, a large-format multimeter can
be connected. The measured signal is conveyed via
a BNC connector or 4-mm safety connectors. A
selector switch makes it possible to carry out AC or
DC measurements.
A filter for smoothing the signal or for fixing the
upper limit of the measuring frequency can be
connected to the measuring input. Four fixed fre-
quencies can be set. The filter makes it possible to
reduce noise voltage when conducting AC or DC
voltage measurements. Thanks to an additional
DIN connector, Hall probes can also be easily con-
nected.
The apparatus U8530501 -115 is for operation with
a mains voltage of 115 V (±10%), and the unit
U8530501 -230 is for operation with a mains volt-
age of 230 V (±10%).
3. Technical data
Output voltage: 0 to ±2 V
Output current: max. 1 mA
Input impedance: DC range: 100 k
Ω
AC range: 900 k
Ω
Display: 3.5-figure value LED display
Input connections: two 4-mm safety connectors
BNC connector
5-pin DIN connector
Output connections: three 4-mm safety connec-
tors
Mains voltage: see rear of equipment hous-
ing
Primary fuse: see rear of equipment hous-
ing
Dimensions: 235 mm x 250 mm x 180 mm
Weight: 3.3 kg approx.
4. Operation
4.1 Operation as a DC meter
• Turn on the mains voltage
• Set the selector switch to DC.
• Set the measuring range (200
μV-200 mV).
• Short the input and adjust the zero calibration
with the DC offset knob.
• Remove the short and connect the load to the
input.
4.2 Operation as an AC meter
• Turn on the mains voltage.
• Set the selector switch to AC.
• Set the measuring range (200
μV-200 mV).
• Connect the load to the input.
4.3 Operation as a DC instrumentation amplifier
• Turn on the mains voltage
• Set the selector switch to DC.
• Set the measuring range (200
μV-200 mV).
• Short the input and adjust the zero calibration
with the DC offset knob.
• Remove the short and connect a demonstra-
tion multimeter (analog display, measuring
range up to max. 2 V) to the output.
• Connect the load to the input.
4.4 Operation as an AC instrumentation ampli-
fier
• Turn on the mains voltage
• Set the selector switch to AC.
• Set the measuring range (200
μV-200 mV).
• Connect a demonstration multimeter (analog
display, measuring range up to max. 2 V) to the
output.
• Connect the consumer equipment to the input.