 PEAK/VALLEY DETECTOR UPPER BOARD WITH BCD OUTPUT OPTION F3P 
Model F3P is an upper-board option which detects and stores the peak or valley value of the input since last reset. This value can be displayed on the meter and is available as non-isolated, buffered, stored, parallel BCD output. The selection of peak or valley is made by a solder switch. The six panel meters which accept the F3P option also provide a separate non-buffered, non-isolated parallel BCD output, which is a standard feature of the main board. THREE OPERATING MODES The F3P provides three operating modes, which are selectable by a three-position toggle switch through the lens of the meter: · In the center position, the meter displays the latest value of the input signal, while the F3P detects the latest peak or valley value and outputs this value as BCD data. · In the left position, the signal input is ignored. The meter display and the BCD output reflect the latest peak or valley value stored in the F3P. · In the right position (which is also Reset), the peak or valley value is continually reset. The meter display and the BCD output reflect the latest value of the input signal, as in a conventional meter. DISPLAY OF PEAK OR VALLEY VALUE There are two methods to display peak or value: · After the peak or valley value has been detected, the switch of the F3P may be placed in the left position, thus displaying the peak or valley value stored in the F3P. · The peak or valley value and the latest signal value may be displayed simultaneously by placing the switch of the F3P in the center position and feeding the BCD output of the F3P into a remote display with BCD input, like Newport's Model 6152A or 6153. The remote display will then show the peak or valley value while the display of the meter shows the latest signal value. Also, the BCD output of the F3P will then reflect the peak or valley value while the standard BCD output of the meter main assembly reflects the latest signal value. The standard BCD output thus remains available for real-time control using Newport's Model 872A setpoint controller, or for datalogging using Newport's Model 820A printer. NON-ISOLATED BCD CIRCUIT The BCD ground of the F3P is tied to meter ground, so that ground loops may create reading errors in case of long line lengths in electrically noisy industrial environments. Ground loops will not occur and the F3Pcan safely be used if any of the following conditions are met: 1) The source of the analog signal is electrically floating. This is normally the case with RTD's and strain gauges. 2) The analog input to the meter is isolated. This is the case with all versions of Model 267B temperature meter and Model 204B with OI (optically isolated)input option. 3) The input to the BCD receiver is electrically floating with respect to power ground. This is the case with most AC-powered receivers, such as Newport's Model 820A printer, Model 872A setpoint controller, and Model 6152A 5-digit remote display. SPECIFICATIONS CONTROL-LOGIC INPUTS Logical "0": 0 to 0.5 V Logical "1": 2.4 to 5.5 V Input load: 0.5 TTL unit loads at 5 V BCD AND CONTROL-LOGIC OUTPUTS Logical "0": 0 to 0.5 V Logical "1": 4.0 to 5.5 V Output drive: 1 TTL unit load at 5 V Hi-Z state: 25 µA leakage at 2.4 V POWER DC voltage: 5 V dc ±5%, 50 mA (nominal) Source of power: Host DPM ENVIRONMENTAL Operating temperature: 0 to 50°C Storage temperature: -40 to +85°C Relative humidity: 95% at 40°C(non-condensing) MECHANICAL Form factor: Newport DIN 1A upper board Dimensions: 3.35 x 4.69 in (85 x 119 mm) Connector: 36-pin, double-row, solder-type
HOME / PRODUCT GUIDE / TECHNICAL REFERENCE NEWPORT Electronics, Inc. (714) 540-4914 or Contact Us Copyright 1998, Newport Electronics, Inc. All rights reserved. |
Peak
or valley detect