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FUNCTION DEFINITIONS (cont)
Alarm Set Point High 2 (SPH2)
SPH2 is independent and functions identically to SPH1. SPH2 has its own
open collector outputs and front panel LED (H2).
Alarm Set Point Low 2 (SPL2)
SPL2 is independent and functions identically to SPL1. SPL2 has its own
open collector outputs and front panel LED (L2).
Alarm Hysteresis High (HH)
HH is the hysteresis value for the alarms SPH1 and SPH2. The hysteresis
value determines the number of counts the displayed reading must fall
below SPH1 and SPH2 values before deactivating their respective open
collector outputs and LEDs. The maximum value of hysteresis is 99
counts while the minimum is 00 counts.
Alarm Hysteresis Low (HL)
HL is the hysteresis value for the alarms SPL1 and SPL2. The hysteresis
value determines the number of counts the displayed reading must exceed
the SPL1 and SPL2 values before deactivating their respective open
collector outputs and LEDs. The maximum value of hysteresis is 99
counts while the minimum is 00 counts.
FS Cal (CAL)
This input allows the user to calibrate the full scale readout to any desired
engineering units. This input must be entered prior to performing the
calibration. The FS Cal number may be any number from 1 to 99,999.
Zero is an invalid FS Cal number. For best resolution and stability, choose
a CAL number between 2000 and 19000 counts.
Example: If the Flowmeter is to be calibrated at a full scale flowrate of
500 sccm, the FS Cal value could be 500.00, 500.0 or 500. If the FS Cal
value of 500.00 is used, the unit will automatically count by 3 when full
scale calibration is completed since the analog-to-digital converter
resolution is only 19,999 counts. Choosing a FS Cal value of 500.0 or 500
assures the best resolution and stability in this particular case.