Liquid Controls SP2800 - Manual (Page 33)

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3-12.2 Analog Inputs and Computations
The Analog input signal is filtered electronically
and converted to a 0 - 10000 Hz input frequency.
(See Section 7, K Factor Calculation and Sec-
tion 4-2, Analog Inputs).
Computations:
Pulses In = Count
Count K Factor
Pulses In = Rate
Rate K Factor
Batch Total =
∑
Count (since last Batch
Reset)
Grand Total =
∑
Count (since last Grand
Total Reset)
Rate = Rate
Tau
Tau = 1 sec or WINDOW if (Rate/1 sec) = 0
(See Sections 1-3 and 3-10, Setting the
Ratemeter)
Frequency Out = Count
(Sequenced out as per OUT FREQ selec-
tion and buffered to 9999 pulses)
(See Sections 1-3 and 3-10, OUT FREQ)
Prewarn Out =
Count
≥
Preset - Prewarn (if Reset to 0)
Count
≤
Prewarn (if Reset to Preset)
Preset Out =
Count
≥
Preset (if Reset to Zero)
Count
≤
0 (if Reset to Preset)
3-12 Internal Operation
3-11.1 Digital Inputs and Computations
The 3-30 Volt input signal is filtered electroni-
cally (See Section 4-1, Digital Pulse Inputs).
Computations:
Pulses In = Count
Count K Factor
Pulses In = Rate
Rate K Factor
Batch Total =
∑
Count (since last
Batch Reset)
Grand Total =
∑
Count (since last
Grand Total Reset)
Rate = Rate
Tau
Tau = 1 sec or WINDOW if (Rate / 1 sec) = 0
(See Sections 1-3 and 3-10, Setting the
Ratemeter)
Frequency Out = Count
(Sequenced out as per OUT FREQ selec-
tion and buffered to 9999 pulses)
(See Sections 1-3 and 3-10, OUT FREQ)
Analog Out =( Rate - SET LOW) x16 + 4
(SET HIGH - SET LOW)
(See Sections 1-3 and 3-10, ALG OUT)
Prewarn Out =
Count
≥
Preset - Prewarn (if Reset to 0)
Count
≤
Prewarn (if Reset to Preset)
Preset Out =
Count
≥
Preset (if Reset to Zero)
Count
≤
0 (if Reset to Preset)