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Watlow D4T Data Logger
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200
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Chapter 6 Appendix
Compare
• Greater than, less than, equal, not equal, greater than or equal, less than or equal
Counters
• Counts up or down, loads predetermined value on load signal
Linearization
• Interpolated or stepped
Logic
• And, nand, or, nor, equal, not equal, latch, flip-flop
Math
• Average, process scale, switch over, deviation scale, differential (subtract), ratio
(divide), add, multiply, absolute difference, minimum, maximum, square root,
sample and hold, pressure-to-altitude and dew point
Process Value
• Sensor backup, average, crossover, wet bulb-dry bulb, switch over, differential
(subtract), ratio (divide), add, multiply, absolute difference, minimum, maximum,
square root, altitude, Vaisala
®
relative humidity and pressure-to-altitude
Special Output Function
• Compressor control (cool and/or dehumidify with single compressor), motorized
valve, sequencer
Timers
• On pulse, delay, one shot or retentive
Variable
• User value for digital or analog variable
D4T Base Ordering Information
Base includes: Battery Backup, Real-Time Clock, 4.3 inch color graphical touch panel, 2 USB
host, USB configuration port, standard bus, wired Ethernet Modbus
®
TCP. Backwards compati-
ble Modbus for select key SERIES F4D/P/S parameters (see the D4T Setup and Operation User's
Guide)