초록 ▼

A reading meter (10) is capable of use with a plurality of different sensor heads (16, 16b). The reading meter (12) includes a digital display (20), a processor (22) and memory (23), and an analog-to-digital converter (ADC 41). Each different sensor head includes a memory (32a) which carries at leas

A reading meter (10) is capable of use with a plurality of different sensor heads (16, 16b). The reading meter (12) includes a digital display (20), a processor (22) and memory (23), and an analog-to-digital converter (ADC 41). Each different sensor head includes a memory (32a) which carries at least the processing algorithm for the particular sensor. In operation, the reading meter (12) reads the detector head memory (32a), and loads the information so read into its processor memory (23). The raw sensor data is converted to digital form, and processed in accordance with the stored algorithm, to produce the desired display. In one embodiment, the detector head memory (32a) is read, and the information is serially coupled to the reading meter. In another embodiment, the serial data is converted to optical signals (634) for transmission. The processor memory (23) may include other data which is held in semipermanent storage, such as calibration data for an ADC within the reading meter, and housekeeping information for the display (20). A count-down counter (52) in each sensor head is programmed with a number representing the number of days remaining in the calibration period, and is decremented daily.

대표청구항 ▼

[ What is claimed is:] [1.] A metering apparatus including a meter adaptable for use with any one of a plurality of sensing heads, said apparatus comprising:a meter including:processor means including ports for receiving sensor input signals and memory input signals and for outputting output signals

[ What is claimed is:] [1.] A metering apparatus including a meter adaptable for use with any one of a plurality of sensing heads, said apparatus comprising:a meter including:processor means including ports for receiving sensor input signals and memory input signals and for outputting output signals;a meter memory coupled to said processor means; andoutput means coupled to said processor means for outputting information in response to said output signals from said processor means; anda sensing head electrically coupled to said meter and including:a sensor for sensing an external stimulus, and for generating sensor signals in response thereto to form said sensor input signals; anda sensor head memory preprogrammed with a processing algorithm which defines the processing to be performed on said sensor input signals to generate a desired output and wherein said processing algorithm is downloaded to said meter to form said memory input signals.