Model 3720 Dual 1x30 Multiplexer Specification Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44139 60 differential channels, automatic CJC w/3720-ST accessory 1-888-KEITHLEY www.keithley.com MULTIPLEXER CONFIGURATION: Two independent 1x 30 2-pole Multiplexers. Banks can be isolated from the backplane by relays. Card can be configured for 2 and 4 wire. CONTACT CONFIGURATION: 2 pole form A. CONNECTOR TYPE: Two 78 pin male D-shells. Model 3720-ST screw terminal option: 22AWG typical wire size with .062 inch O.D 124 conductors maximum. 16 AWG maximum wire size with .092 inch O.D. 36 conductor per card maximum. MAXIMUM SIGNAL LEVEL: Channels (1-60): 300V DC or RMS, 1A switched (2A carry), 60W, 125VA. COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis. 7 VOLT-HERTZ LIMIT: 8x10 5 CONTACT LIFE: > 10 operations at max signal level. 8 1 > 10 operations no load. 3 2, 3 Dual 1x30 Single 1x60 Channel Resistance <1.0 <1.5 (end of contact life) Contact Potential < 1V < 3V (differential) Offset Current <250pA <250pA Isolation 9 9 Differential 10 ,250pF 10 ,450pF 10 Bank-Bank 10 ,75pF 9 9 CH CH 10 ,75pF 10 ,75pF 9 9 Common mode 10 ,200pF 10 ,400pF Crosstalk CH-CH <-60dB <-55dB 300KHz: <-50dB <-50dB 1MHz: <-25dB <-20dB 20MHz: Bandwidth 30MHz 10MHz 1 Open detector enabled during thermocouple measurements. Minimum signal level 10mV,10uA. 2 3706 mainframe with all DMM backplane relays disconnected. Maximum two card backplane relays closed. 3 Connections made using 3720-ST accessory Specifications are subject to change without notice. SPEC-3720 Rev. C / February 2009 Page 1 of 4 Model 3720 Dual 1x30 Multiplexer Specification Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44139 60 differential channels, automatic CJC w/3720-ST accessory (440) 248-0400 www.keithley.com GENERAL: ACTUATION TIME: 4ms TEMPERATURE ACCURACY USING Automatic CJC with 3720-ST accessory: 1C for J, K, T and E type (see mainframe specification for details) RELAY TYPE: Latching electromechanical RELAY DRIVE SCHEME: Matrix INTERLOCK: Backplane relays disabled when interlock connection removed. OPERATING ENVIRONMENT: Specified for 0C to 50C. Specified to 70% R.H. at 35 STORAGE ENVIRONMENT: -25C to 65C WEIGHT: 2.5lb SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1 EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1 4 Typical Scanning Speeds, switch only Ch/Sec Sequential scanning ,single channel, immediate trigger advance >120 5 Typical Scanning Speeds, with measurements into memory Ch/Sec DCV (10V range) or 2W Ohms (1K range) >110 Thermocouple >110 3 or 4 Wire RTD >100 4 Wire Ohms (1k range) >100 ACV (10V range) > 110 4 Scanning script local to 3706 mainframe, within same bank, and break before make switching. 5 3706 mainframe with autorange off, limits off, dmm.autozero=0, dmm.autodelay=0, 4 digits (NPLC=.006), for ACV dmm.detectorbandwidth=300,for OHMs dmm.offsetcompensation=off ,dmm.opendetector=off. Scanning script local to mainframe, sequential scan within same bank (2 pole ) or card (4 pole), and break before make switching. Specifications are subject to change without notice. Page 2 of 4 SPEC-3720 Rev. C / February 2009