PASCO CI-6685 BNC ADAPTER User Manual

Page 3

012-07157A

BNC Adapter

DIN Connector Specifications

1: analog output (+),

-10 to +10 V

2: analog output (-),

signal ground

3: (no connection)

4: (no connection)

5: power ground

(internally connected
to signal ground)

Specifications

maximum input voltage: ±10 V

input resistance: interface dependent (see Table 1)

Tips on Using Oscilloscope Probes

Oscilloscope probes are convenient to use for many

measurements. However, it is important to determine

which of the two common types the probe is: X1

(times one) or X10 (times 10). X1 probes are

sometimes used with low level signals where signal

attenuation is undesirable. X10 probes are useful for

making measurements where you do not want the

probe to load the circuit significantly.

When used with a ScienceWorkshop Interface, a X10

probe will form a voltage divider with the interface.

Depending on the interface in use, this division will

vary.

Table 1 shows the input resistance of the various

PASCO Computer Interfaces. Note that the resistance

can also vary with the channel in use.

The exclamation point within an
equilateral triangle is intended to alert
the user of the presence of important
operating and maintenance (servicing)
instructions in the literature
accompanying the device.

A straightforward use of a X10 probe would be to use

it with a ScienceWorkshop 750 Interface with the

analog channel set for 10X gain. Use of a X10 probe

with any other interface will require that the raw

reading be modified within the data acquisition

software to obtain the correct result.

Given the potential for errors, it is normally best to use

a X1 probe.

Table 1
Input resistance of the

ScienceWorkshop computer

interface analog channels

Interface

Input Resistance (ohms)

Channel A

Channel B

Channel C

300/500

200K

700

750

Note: This instruction sheet was written

assuming that the user is familiar with

ScienceWorkshop or DataStudio. Users can

gain familiarity by working through the

tutorials provided with ScienceWorkshop or

from DataStudio’s Online Help.