Model 3762 10-Channel High Voltage Multiplexer Card User's Manual
Section 1: Introduction
3762-900-01 Rev. A / July 2017
1-3
Common mode voltage
1000 V peak
Environmental conditions
Indoor use only
Operating:
0 °C to 50 °C (32 °F to 122 °F), 70% relative humidity up to 35 °C (95
°F); derate 3% relative humidity per °C, 35 °C to 50 °C, noncondensing
Storage:
−25 °C to 65 °C (-13 °F to 149 °F)
Altitude:
0 to 2000 m (0 to 6562 feet) above sea level
Pollution degree:
2
The 3762 is a two-pole high-voltage multiplexer card that switches signal levels up to 1000 V, 0.5 A or
10 VA peak (10 mA at 1000 V) for resistive loads only. Each of the 10 channels on the card consists
of two single-pole relays combined to create a normally open, double-pole, two-form A channel with a
user selectable shield or driven guard connection. The output connection and the input connections
have screw terminals with a maximum allowable wire size No. 16. The schematic representation is
shown in the next figure.
Figure 1: Model 3762 simplified schematic
Switching is done in less than 2 milliseconds, exclusive of the mainframe, and the specified contact
life is >10
6
closures with cold switching and >1 x 10
6
closures at 1000 V/1 ma. The relay drive current
is 80 mA per channel (40 mA per relay).
The 3762 is field installable in an appropriate Keithley Series 3700A Systems Switch Multimeter (for
example, Model 3700A). With the isolation between each channel being greater than 10
10
Ω and less
than 10 pF, each channel is well insulated from cross-channel noise and interference.
Specifications
For the most recent instrument specifications, search for the 3762 on the
Keithley Instruments
website
(
http://www.tek.com/keithley
).
