Tektronix KEITHLEY 7700

Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
tek.com/keithley
Model 7700 Multiplexer Module
Instructions for use with DAQ6510
077144300 / April 2018 *077144300 * 1
Introduction
The 7700 20-Channel Differential Multiplexer Plug-In Module offers 20 channels of 2-pole or 10 channels of
4-pole multiplexer switching that can be configured as two independent banks of multiplexers. There are two
additional protected channels for current measurements. Automatic cold junction compensation (CJC) is
provided so that no other accessories are required to make thermocouple temperature measurements. In
addition, the 7700 contains latching electromechanical relays that enable signal bandwidths of up to 50 MHz.
The 7700 is ideal for RTD, thermistor, and thermocouple temperature applications.
Figure 1: 7700 20-Channel Differential Multiplexer Module
Item shipped may vary from model pictured here.
The 7700 includes the following features:
 2-wire or 4-wire resistance measurements (automatically pairs switches for 4-wire measurements —
n + 10)
 Screw terminal connections
 Built-in cold junction reference
 Latching type relays (relays hold their position after power is removed)
 Two protected channels for current measurements (external shunts not required)
The 7700 can be used with the DAQ6510 Data Acquisition and Multimeter System.
If you are using this switching module with the 2700, 2701, or 2750, please see Model 7700, 7702,
and 7703 Multiplexer Modules Connection and Wiring Information, Keithley Instruments document
PA-695.

Tektronix KEITHLEY 7700 Specifications

General

Brand	Tektronix
Model	KEITHLEY 7700
Category	Multiplexer
Language	English

Summary

Introduction

Connections and Wiring

Wiring Procedure

Details the steps and precautions for wiring the 7700 module to the DAQ6510.

Module Handling

Module Removal

Provides instructions and safety warnings for safely removing the switching module.

Module Installation

Details the process of installing the switching module into the DAQ6510 instrument.

Operation and Configuration

Simplified Schematic

Illustrates the internal connections and signal paths of the 7700 multiplexer module.

Calibration

Calibration Setup and Equipment

Lists required equipment and describes extender board connections for module calibration.

Performance Verification

Verification Conditions

Specifies environmental conditions and instrument warm-up periods for accurate verification.

Verification Equipment

Lists recommended test equipment for performing module performance verification.

DC Voltage Verification

Details the procedure for testing the module's DC voltage measurement accuracy.

AC Voltage Verification

Describes steps to verify the module's AC voltage measurement accuracy.

Resistance Verification

Explains how to check the module's resistance measurement accuracy.

Temperature Verification

Covers procedures for verifying thermocouple and RTD temperature measurements.

Frequency Verification

Details the process for verifying the module's frequency measurement capabilities.

Ratio and Average Verification

Outlines the procedure to verify the module's ratio and average measurement functions.

Factory Service

Safety Precautions