Measurement Computing WaveBook rev.3.0 - Manual (Page 81)

WaveBook User’s Manual, ch03Dn 6-21-99 WBK Expansion Options 3-49
WBK61/62 - High-Voltage Adapters
Description
WBK61 and WBK62 are single-channel high-voltage adapters that can be used with the WaveBook or
WBK10/10H expansion modules. In addition, WBK61 and WBK62 can be used with WBK11, WBK12,
and WBK13 cards.
WBK61 and WBK62, Simple Comparison
WBK61 WBK62
Voltage Divider 200:1 fixed 20:1 fixed
Maximum Voltage 1000 Vpeak (on either input
reference to earth ground) 100 Vpeak (on either input
reference to earth ground)
Maximum Differential
Voltage 2000 Vpeak (if neither input
exceeds 1000 Vp rating to earth
ground) 200 Vpeak (if neither input
exceeds 100 Vp rating to earth
ground)
WBK61 and WBK62 channel output connection is made through a BNC-to-BNC coupler. Each model has
two signal input-connections, one for low-signal input, and the other for high-signal input. The input
channels are resistively isolated from ground, providing for safe connection of the test device. Series
resistors, for both high and low channels, serve as attenuators and provide a maximum current limit of
100 µA.
WBK61 and WBK62 include safety-style banana-jacks for the high and low inputs, and 60-inch (152 cm)
cables with probe tips and alligator clips for easy input connection. The figure shows simple diagrams for
each model.
N N
Low Low
10 M Ω 1 M Ω
WBK61, with 200:1 Divider Ratio WBK62, with 20:1 Divider Ratio
To channel
input To channel
input
(Note 1)
(Note 2) (Note 2)
(Note 1)
Note 1: Channel input connections are made (BNC-to-BNC) to the WaveBook/512 data acquisition system,
or to the WBK10 analog expansion module. Refer to Hardware Setup in regard to analog-ground
and earth-ground connections.
Note 2: The variable resistors are and not user-adjustable . factory-set at 50K Ω
10 M Ω 1 M Ω
50 K Ω 50 K Ω
50 K Ω 50 K Ω
High High
WBK61/62 Block Diagram
Hardware Setup
Refer to the following steps and figures to connect the high voltage adapter. Note that the term
“WBK61/62” refers to both WBK61 and WBK62; the installation of these models is identical.
WARNING WARNING WARNING WARNING
High voltages can cause death or severe injury. Do not connect or disconnect the
probes from WBK61/62 when leads are connected to a voltage source.
WARNING WARNING WARNING WARNING
Failure to properly connect WBK61/62 to the acquisition device (WaveBook or
WBK10) and to ground will result in unsafe operation.