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> New keithley 7057A thermocouple scanner card ** **
New keithley 7057A thermocouple scanner card ** **
NEW Keithley Model 7057A Thermocouple scanner card w/manual in original ESD packaging.
CHANNELS PER CARD: 9 plus temperature reference.
CONTACT CONFIGURATION: 2-pole Form A, with common guard.
CONNECTOR TYPE: Screw terminals in isothermal block, #18AWG maximum wire size.
RELAY DRIVE CURRENT: 12mA per relay typical.
TEMPERATURE REFERENCE: Thermistor in a linearized bridge.
TEMPERATURE OFFSET: ±0.05°C maximum from HI to LO of any channel or between any two adjacent channels in one column on the isothermal block. ±0.1°C maximum between any two terminals on the isothermal block. Maximum additional dynamic offset due to 10°C step change in environment: ±0.1°C after one hour settling.
REFERENCE OUTPUT: –1mV/°C (0mV at +30°C).
REFERENCE ACCURACY (1 Year): ±0.25°C (10°C to 35°C); ±0.5°C (0°C to 10°C and 35°C to 50°C).
WARM-UP: 1 hour to rated accuracy in mainframe.
MAX. SIGNAL LEVEL: 42V, 100mA, 2VA (resistive load only).
CONTACT LIFE: >10^8 closures cold switching; >10^6 closures at maximum signal levels.
CONTACT RESISTANCE: <2 ohm to rated life.
CHANNEL ISOLATION: >10^8 ohms, <10pF.
INPUT ISOLATION: >10^7 ohms, <150pF.
COMMON MODE VOLTAGE: 200V peak.
SPECIFIED ENVIRONMENT: 10° to 35°C, up to 70% RH.
