Campbell Scientific CR1000KD CR1000 Measurement and Control System - Page 469

Section 11. Glossary terminal emulator is available in most datalogger support software available from Campbell Scientific. thermistor A thermistor is a resistive element whose change in resistance with temperature is wide, stable, and well‐characterized. It can be used as a device to measure temperature. The output of a thermistor is usually non‐linear, so measurement requires linearization, usually by means of the Steinhart‐Hart or another polynomial equation. Campbell Scientific thermistors, models 107, 108, and 109, are linearized by Steinhart‐Hart as implemented in the Therm107(), Therm108(), and Therm109() instructions. throughput The throughput rate is the rate at which a measurement can be taken, scaled to engineering units, and the reading stored in a data table. The CR1000 has the ability to scan sensors at a rate exceeding the throughput rate. The primary factor affecting throughput rate is the amount of processing specified by the user. In sequential‐mode operation, all processing called for by an instruction must be completed before moving on to the next instruction. TTL Transistor‐transistor logic. A serial protocol using 0 Vdc and 5 Vdc as logic signal levels. TLS Transport layer security. An Internet communications security protocol. toggle To reverse the current power state. UINT2 Data type used for efficient storage of totalized pulse counts, port status (status of 16 ports stored in one variable, for example) or integer values that store binary flags. UPS Uninterrubtable power supply. A UPS can be constructed for most datalogger applications using ac line power, an ac/ac or ac/dc wall adapter, a charge controller, and a rechargeable battery. 469