APPENDIX A. GLOSSARY

PRINT PERIPHERAL: See Print Device.

PROCESSING INSTRUCTIONS: These Instructions allow the user to further process input data values and return the result to Input Storage where it can be accessed for output processing. Arithmetic and transcendental functions are included in these Instructions.

PROGRAM CONTROL INSTRUCTIONS: Used to modify the sequence of execution of Instructions contained in Program Tables; also used to set or clear flags.

PROGRAM TABLE: That portion of memory allocated for storing programs consisting of a sequence of user instructions which control data acquisition, processing, and output to Final Storage. Programming can be separated into 2 tables, each having its own user-entered Execution Interval. A third table is available for programming subroutines which may be called by instructions in Tables 1 or 2. The *1 and *2 Modes are used to access Tables 1 and 2. The *3 Mode is used to access Subroutine Table 3. The length of the tables is constrained only by the total memory available for programming (Section 1.5). Tables 1 and 2 have independent execution intervals. Table 1 execution has the higher priority; it may interrupt Table 2.

RING LINE (PIN 3): Line pulled high by an external device to "awaken" the CR10.

SAMPLE RATE: The rate at which measurements are made. The measurement sample rate is primarily of interest when considering the effect of time skew (i.e., how close in time are a series of measurements). The maximum sample rates are the rates at which measurements are made when initiated by a single instruction with multiple repetitions.

SIGNATURE: A number which is a function of the data and the sequence of data in memory. It is derived using an algorithm which assures a 99.998% probability that if either the data or its sequence changes, the signature changes.

SYNCHRONOUS: The transmission of data between a transmitting and receiving device occurs as a series of zeros and ones. For the data to be "read" correctly, the receiving device must begin reading at the proper point in the series. In synchronous communication, this coordination is accomplished by synchronizing the transmitting and receiving devices to a common clock signal (see Asynchronous).

THROUGHPUT: The throughput rate is the rate at which a measurement can be made, scaled to engineering units, and the reading stored in Final Storage. The CR10 has the ability to scan sensors at a rate exceeding the throughput rate (see SAMPLE RATE). The primary factor affecting throughput rate is the amount of processing specified by the user. In normal operation, all processing called for by an instruction must be completed before moving on the next instruction. The maximum throughput rate for a fast single-ended measurement is approximately 192 measurements per second (12 measurements, repeated 16 times per second). This rate is possible if the CR10's self-calibration function is suspended (this is accomplished by entering Instruction 24 into Program Table 2 while leaving the Execution Interval 0 so Program Table 2 never executes).

When the self-calibration function is operating, the maximum throughput rate for a fast, single- ended measurement is 192 measurements per second (12 measurements, 16 times per second).

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