Keithley 2000-Scan Operation & User’s Manual

Text of Keithley 2000-Scan User Guide:

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 3: Operation 2000-SCAN-900-01 Rev. A / April 2018 3-15 Current shunt locations The following figure shows the locations for the user-installable current shunts. Figure 23: Current shunt locations Recommended current shunt values Hole spacing on the circuit board is intended for 1/4 W resistors. The resistance value depends on the current you are measuring; a 1 kΩ resistor should be optimum for many applications. A 1 kΩ

• Keithley 2000-Scan, Safety precautions The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the

• Model 2000 -SCAN Scanner Card User's Manual Section 2: Card connections and installation 2000-SCAN-900-01 Rev. A / April 2018 2-11 Scanner card installation Turn off power to all instruments (including the multimeter), and disconnect all power cords. Make sure all power is removed and any stored energy in external circuitry is discharged.

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 2: Card connections and installation 2000-SCAN-900-01 Rev. A / April 2018 2-9 Making 4-pole connections Typical 4-pole resistance connections are shown in the following figure. This general configuration can be used with all channels to scan: • 4-wire resistance measurements • 4-wire RTD temperature measurements Figure 7: Typical connections for 4-wire resistance scanning

• Keithley 2000-Scan, Section 3: Operation Model 2000-SCAN Scanner Card User's Manual 3-8 2000-SCAN-900-01 Rev. A / April 2018 Two-wire resistance tests The figure below shows a typical setup for making 2-wire resistance measurements. The following figure shows an equivalent circuit. The 2000-SCAN provides the switching function, while the resistance measurements are made by the DMM6500. Since only 2-pole switching is required for this application, one 2000-SCAN can be used to switch up to 10 resistors. Figure 17: Two-wire resistance test configuration Figure 18: Two-wire resistance test equivalent circuit

• Keithley 2000-Scan, Section 3: Operation Model 2000-SCAN Scanner Card User's Manual 3-16 2000-SCAN-900-01 Rev. A / April 2018 Current connections The figure below shows typical connections for measuring currents using the 2000-SCAN with current shunts installed. As noted, only channels 1 and 6 have current shunts installed, and this configuration can be used to scan the following: • DC current • AC current Figure 24: Current connections

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 3: Operation 2000-SCAN-900-01 Rev. A / April 2018 3-7 Setting up an RTD measurement on the front panel To set up an RTD measurement on the front panel: 1. After selecting the channels for your scan, select Temperature. 2. From the SETTINGS tab, select the Transducer options. 3. Select 2-Wire RTD, 3-Wire RTD, or 4-Wire RTD. 4. Below the Transducer options, the selected transducer type will have RTD options. Select the appropri

• Keithley 2000-Scan, Section 2: Card connections and installation Model 2000-SCAN Scanner Card User's Manual 2-12 2000-SCAN-900-01 Rev. A / April 2018 Figure 9: Lock card To install your 2000-SCAN: 1. Remove power from the DMM6500. 2. Disconnect the power cord and any other cables that are connected to the rear panel. 3. Remove the cover plate from the Accessory Card Slot on the rear panel of the multimeter. To do so, move the tab on the cover plate up and out. 4. Slide the card edges into the guide rails

• Model 2000 -SCAN Scanner Card User's Manual Section 2: Card connections and installation 2000-SCAN-900-01 Rev. A / April 2018 2-7 Typical connecting schemes This section discusses typical connections for the scanner card. Voltage connections The figure below shows typical connections for voltage measurements. Note that all channels are used in the 2-pole mode and that up t

• Keithley 2000-Scan, For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be impaired. Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards. When fuses are used in a produc

• Keithley 2000-Scan, Scanner Card User's Manual © 2018, Keithley Instruments, LLC Cleveland, Ohio, U.S.A. All rights reserved. Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part, without the prior written approval of Keithley Instruments, LLC, is strictly prohibited. These are the original instructions in English. TSP ® , TSP-Link ® , and TSP-Net ® are trademarks of Keithley Instruments, LLC. All Keithley Instruments product names are trademarks or registered trademar

• Keithley 2000-Scan, In this section: Introduction .............................................................................. 1-1 Features ................................................................................... 1-1 Unpacking and inspection ........................................................ 1-1 Factory service ......................................................................... 1-2 Introduction This section contains general information about the 2000-SCAN Scanner Card. The 2000-

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 3: Operation 2000-SCAN-900-01 Rev. A / April 2018 3-13 Measurement functions for each scanner channel are defined using the FUNCTION menu when building a scan. Measurement functions for this test would be set up as follows: • Channels 1 and 2: 4W Ω • Channels 3, 4, 5, and 8, 9, 10: 2 WΩ Functions cannot be defined for channels 6 and 7 with this application because these channels are paired with channels 1 and 2 for 4-pole switching. Use the SCPI commands below to set up a combination 2- and 4-wire resistance test usin

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 3: Operation 2000-SCAN-900-01 Rev. A / April 2018 3-9 Use the SCPI commands below to set up a 2-wire resistance test using the DMM6500 and your 2000-SCAN. *RST Puts the DMM in a known state FUNC 'RES', (@1:10) Sets the channels for 2-wire measurements RES:RANG 100e3, (@1:10) Sets the range to 100 kΩ ROUT:SCAN:CRE (@1:10) Creates the scan ROUT:SCAN:COUN:SCAN 1 Sets the scan count TRAC:CLE Clears the buffer INIT Initiates the scan Below

• Keithley 2000-Scan, Section 3: Operation Model 2000-SCAN Scanner Card User's Manual 3-14 2000-SCAN-900-01 Rev. A / April 2018 Current measurements The 2000-SCAN is not intended for direct current measurements, but by installing a shunt resistor, you can measure and calculate current. There are no dedicated channels or channel routing to measure current on the scanner card. Shunt resistors can be installed for channels 1 and 6 to allow for indirect current measurements. The following figure shows the typical confi

• Section 3: Operation Model 2000-SCAN Scanner Card User's Manual 3-18 2000-SCAN-900-01 Rev. A / April 2018 Magnetic fields When a conductor cuts through magnetic lines of force, a small current is generated. This may cause unwanted signals to occur in the test leads of a scanning system. If the conductor has sufficient length, even weak magnetic fields can create suf

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 3: Operation 2000-SCAN-900-01 Rev. A / April 2018 3-19 Ground loops When two or more instruments are connected, you must take precautions to avoid unwanted signals from ground loops. Group loops typically occur when sensitive instrumentation is connected to other instrumentation with more than one signal return path such as power line ground. As shown in the following figure, the resulting ground loop causes current to flow through the instrumentation LO signal leads and then back through the power line ground. This circulating current develops a small but unwanted voltage betwee

• Keithley 2000-Scan, In this section: Introduction .............................................................................. 3-1 Signal limitation ........................................................................ 3-1 Scanner card detection ............................................................ 3-2 Basic front-panel measurements .............................................. 3-2 RTD temperature measurements ............................................. 3-6 Typical applications .......................................................

• Keithley 2000-Scan, Section 3: Operation Model 2000-SCAN Scanner Card User's Manual 3-12 2000-SCAN-900-01 Rev. A / April 2018 Combining 2-pole and 4-pole switching The 2000-SCAN can combine 2- and 4-pole switching in various combinations. This is useful if you require 4-pole switching for only two resistors. The remaining resistors can be tested using conventional 2-pole switching. The figure below shows a test configuration using mixed 2- and 4-pole switching. Four-pole switching is only used for device 1 (connected to channels 1 and 6) and device 2 (connected to channels 2 and 7). Six more resistors are tested us

• Keithley 2000-Scan, Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments. All other trademarks and trade names are the property of their respective companies. Keithley Instruments Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 • 1-800-935-5595 • www.tek.com/keithley 12/17

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 3: Operation 2000-SCAN-900-01 Rev. A / April 2018 3-3 2. From the 2000-SCAN channel list, select the box next to the channel number to open or close it. Selecting the channel box again will open the channel, and the connection icon will move to the open state. Figure 12: DMM6500 channel list 3. When closing a channel, select the measurement function for that channel from Measure Functions screen. Note that you will select a measurement function for each channel you close. Figure 13: Measurement function screen 4. Select OK.

• Keithley 2000-Scan, Section 2: Card connections and installation Model 2000-SCAN Scanner Card User's Manual 2-4 2000-SCAN-900-01 Rev. A / April 2018 Card connectors The following figure shows the input and output connectors for the card. Card connectors include: • CH 1 to 10 (channels 1 to 10): HI and LO input terminals provided for each of the 10 channels on the card. • OUT A: HI and LO output connections for all 10 channels in 2-pole mode or channels 1 to 5 in 4-pole mode. • OUT B: HI and LO output connections for channels 6 to 10 in 4-po

• Keithley 2000-Scan, Model 2000 -SCAN Scanner Card User's Manual Section 3: Operation 2000-SCAN-900-01 Rev. A / April 2018 3-5 Selecting channels for a scan To select channels from the front panel: 1. From the Build Scan screen, select Add Group of Channels to access the 2000-SCAN channel list. If you selected the channels for your scan from the Channels tab on the swipe screen, you can skip this step. Figure 15: Add group of channels 2. From the 2000-SCAN channel list, select the box next to the channel number to select your channels. 3. Select OK to proceed to the Measurement F

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