Laurel Electronics LAUREATE SERIES COUNTER_TIMER - Manual (Page 53)

BCD OUTPUT OPTION
Isolation .................................................. Safety-rated to 250Vac, 4.2kVp per High Voltage Test
Power ........................................................................................................... supplied by basic meter
Type ...............................................................................................................3-state, stored, parallel
Signal Levels ..........................................................................................LSTTL, CMOS compatible
Controls ..........................................................................................BCD Enable, Hold, Data Ready
ENVIRONMENTAL
Operating Temperature ................................................................................................. 0°C to 55°C
Storage Temperature ..................................................................................................-40°C to 85°C
Relative Humidity .......................................................................................... 90% from 0°C to 40°C
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22. GLOSSARY OF TERMS
Calibration A menu item that compensates for any error in the crystal oscillator in the
meter. With an accurate, known frequency input, a value in parts per
million is entered equivalent the error in parts per million of the input signal.
If the displayed reading is lower than the actual signal input, a positive
value is entered. If the displayed reading is higher, a negative value is
entered.
Calculated Total In most cases, total is calculated by directly counting the number of pulses
of the input signal and applying a scale factor to read in engineering units.
Some totals (Total A, Rate A) are calculated totals. In these cases, the
meter determines the rate of the input signal and multiplies by the time
between rate conversions to calculate total. The scale factor for total is
based on the displayed value of rate. A scale of 1 always produces a total
at the end of 1 second equal to the displayed rate. For a display of 300
where the rate is equivalent to gallons per second, a scale factor of 1
produces a total that at the end of 1 second is 300, 2 seconds 600, etc.
However, if the displayed rate is 300 gallons per minute, then the scale
factor must be 1.66667 with a multiplier of .01 ( a multiplier of 1/60 since
the rate value is in minutes) to produce a total a the end of 1 minute of 300,
at 2 minutes 600 etc.
Coordinates of 2 Points Instead of using scale and offset to display in engineering units, the
coordinates of 2 points may be used. The low input is entered as
frequency in Hertz for the lowest frequency input to the meter and low
reading is entered as the value to be displayed at that frequency. High
input is entered as frequency in Hertz for the highest frequency input to the
meter and high reading as the value to be displayed at that frequency.
Custom Curve In the extended version of the counter, the unit is capable of linearizing the
input signal by using the software provided and loading the values into