Keithley 3730 User Manual

Series 3700
System Switch/Multimeter User's Manual Section 4:
Closing and Opening Switching Module Channels
Document Number: 3700S
-900-01 Rev. A / August 2007 4-
13
 Enclose the contents of the channel list in either single (') or double (") quotes, but the
quote style must match.
 Use a comma or semicolon to separate the channel list or channel patterns.
 The string may contain a single channel, channel pattern or analog backplane relay as
well as multiple ones that are indicated by a range or comma separated.
 Use a colon to specify a range of channels. Example:
channel.getbackplane("1001:1003") responds with the range of Slot 1 channels from 1 to
3.
Although a parameter string may be valid, the command that calls it will determine the string's
ultimate validity. For example, only channels have a pole setting (channel patterns do not). If a
channel pattern is passed to the poles setting command, an error would be generated.
Channel patterns may be included as a <ch_list> parameter.
<ch_list> queries
For queries that return a channel list parameter, a channel configured for 4-pole operations will
indicate the paired channel in parenthesis. For example, Channel 3003 on a 60-channel card is
configured for 4-pole, then sending:
channel.close('3003')
print(channel.getclose('slot3')  3003(3033)
NOTE In the above examples output the paired channel associated with 3003 is 3033 and
is in included in parenthesis.
Channel operation
The channel number is displayed on the Series 3700's front panel. For a 4-wire function (in other
words, Ω4), the paired channel is internally connected to DMM sense, but not displayed. When
triggered, the DMM performs a measurement and displays it on the Series 3700.
When a measurement channel is closed (measurement channel meaning that a function other
than 'no function' is associated with the channel), the input backplane isolation channel also
closes to connect the channel to DMM input. For a 4-wire function, the paired channel and the
sense backplane isolation channel also close to make the sense connections to the DMM.

Keithley 3730 Specifications

General

Category	Multimeter
Module Slots	6
Model	3730
Measurement Functions	Frequency, Capacitance, Temperature
Frequency Range	3Hz to 1MHz
Temperature Range	-200°C
Interface	GPIB, USB

Summary

WARRANTY

Section 3 Rear Panel

Switching module installation and connections

Details the process for installing switching modules and making external connections.

Connections

Provides critical connection information and safety precautions for switching modules.

Bus operation

Explains how to configure and use bus operations over USB, Ethernet, and GPIB.

Line power connection

Guides users on connecting the Series 3700 to line power and turning it on.

Section 4 Closing and Opening Switching Module Channels

Channel operation (non-channel pattern operation)

Describes standard channel operations for closing and opening individual channels.

Channel pattern operation

Details flexibility for individual control of switching modules and backplane channels.

Close/open commands and operation

Lists available commands for switching operations like close and open.

2-wire functions

Illustrates channel connections for a 2-wire function, such as DC volts.

4-wire functions (paired channels)

Explains 4-wire function requirements, pairing channels for INPUT and SENSE.

Relay closure count

Describes how the system tracks relay closure counts for maintenance and diagnostics.

Section 5 Basic Digital Multimeter (DMM) Operation

DMM measurement capabilities

Lists the various measurements the DMM of the Series 3700 can perform.

High-energy circuit safety precautions

Provides safety guidelines for measuring voltage in high-energy distribution circuits.

Voltage measurements (DCV and ACV)

Details DCV and ACV measurement ranges, input resistance, and protection.

Resistance measurements

Describes resistance measurement methods, including 2-wire and 4-wire techniques.

Dry circuit ohms (DRY+)

Describes dry circuit ohms for low open-circuit voltage resistance measurements.

Open lead detection

Explains the four methods used by the Series 3700 to detect open lead conditions.

Temperature measurements

Covers temperature measurement using thermocouples, thermistors, and RTDs.

Frequency and period measurements

Details frequency and period measurement capabilities and procedures.

Continuity testing

Explains how to perform continuity testing using a selectable threshold resistance.

Section 6 ICL Command List

dmm functions

Covers commands for DMM operation, setting limits, and performing calibration.

Section 7 Upgrade Procedure Using USB Flash Drive

Section 8 Maintenance

Fuse replacement

Provides instructions on how to replace analog backplane and instrument fuses.

Section 9 Series 3700 Module Schematics and Connections

Power budgeting and calculation

Explains how to calculate total power required for relay operations and quiescent power.

Power budgeting examples

Provides examples of power calculations for different configurations of Series 3700 cards.

Model 3720 dual 1x30 multiplexer card

Describes the Model 3720 card, its features, and available accessories.

Model 3721 dual 1x20 multiplexer card

Details the Model 3721 card, its features, and available accessories.

Model 3721: AMPS channels fuse replacement

Explains the procedure for replacing fuses on the Model 3721 AMPS channels.

Model 3722 dual 1x48 high density multiplexer card

Describes the Model 3722 card, its features, and available accessories.

Model 3723 dual 1×30 high-speed multiplexer card

Model 3730 6×16 high-density matrix card

Model 3740 32-channel isolated switch card