KEITHLEY System, Scanning and Thermometer Model: 740
**This unit has been tested to specifications. Has slight cosmetic blemishes from normal use. See photos for further details.
The Model 740 is a system scanning thermometer that can make temperature measurements using seven different thermocouple types ( J, K, T, E, R, S, B) or millivolt measurements. With the use of the various thermocouple types, temperature measurements in the range of -200 C to +1820 C can be made. A single internal channel is standard equipment in the Model 740. The installation of a Model 7057A scanner card into the Model 740 expands the available measurements channels to nine. The measurement system is expandable to 81 channels with the addition of four Models 705s, or one Model 706 with eight scanner cards installed.
740 Features
Automatic scanning and data storage with HI/LO, of up to 81 channels.
20 channels per second scanning rate
C or F temperature scale
mV measurement capabilities
100 point single channel data logger with HI/LO/AVG
24 hour clock for time day and starting a scan or log
Open thermocouple detection
IEE Smart Print mode - talk to addressable as well as listen-only devices
Digital calibration - no internal adjustments to be made
Specifications
Maximum Allowable Input: 250V rms, 350V peak (for 1 minute)
Maximum common Mode Voltage: 200V peak to earth
Maximum Thermocouple loop resistance: 1kO
Filter Settling time: 100ms (typical)
Scanning Rate: Greater than 20 channels/second, filter disable. Greater than 5 channels /second, filter disable.
Bench Reading rate: 8 readings/ seconds filter disabled. 4 reading/second filter enabled.
Logging Interval: One of 12 selectable rates from 50ms to 1 hour or triggered.
Scanning Interval: One of ten selectable rates from 500ms to 1 Hour or triggered.
Capacity: Single channel or 10 channels including reference junction using one model 7057A thermocouple scanner card. Up to 90 channels including references junction using 8 additional model: 7057A Thermocouple scanners cards and one model: 706 or four model: 705 scanners
Operating Environment: 0-50 less than 80% relative humidity up to 35C: linearly derate 3% RH, 35-50C.
Storage Environment: -25 to 60'C
Power: 105-125V or 210-250V 20VA. 90-110V available, 50/660Hz
Additional Prep Fees May Apply
