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IM_ONE-01
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IMPORTANT NOTE:
3-state switch (pulsed) modes must not be used when the switch output is connected directly to a load that could be damaged by being
switched at the pulse frequency. For these types of loads, use a 2-state mode.
SET POINT
:
The set point is the value at which the One Series changes the state of the output. It is fully adjustable throughout the operating range of the unit (noted on the
nameplate). Model 8W2D has two independent set points, one for each switch output.
DEADBAND
:
Deadband is the amount above or below the set point at which the One Series changes the output state back to normal operation. In rising modes of operation
the deadband must be less than the set point. In falling modes of operation the deadband must be less than the operating range of the unit minus the set point.
In the One Series menu, the deadband is represented as a value which is added or subtracted from set point, depending on control mode (e.g., if the Control Mode
is “Open on Rise” and the set point is set at 100 psi with a deadband of 10, the output will open as the pressure rises through 100 psi and close as the pressure
falls through 90 psi. If the Control Mode is changed to “Open on Fall”, the output would open as the pressure falls through 100 psi and close as the pressure
rises through 110 psi). The deadband should be set wide enough so that frequent cycling or chatter does not occur, but narrow enough to satisfy conditions for
normal process operation. Model 8W2D has two independent deadband settings, one for each switch output.
Mode is changed to “Open on Fall”, the output would open as the pressure falls through 100 psi and close as the pressure rises through 110 psi). The deadband
should be set wide enough so that frequent cycling or chatter does not occur, but narrow enough to satisfy conditions for normal process operation. Model 8W2D
has two independent deadband settings, one for each switch output.
ADVANCED FEATURES
NOTE:
No initial programming of these features is required. The default for these advanced commands is zero or off.
MINIMUM & MAXIMUM READINGS:
The One Series continuously captures the readings from the sensor and stores the minimum and maximum values since the last time they were reset. These can
be viewed at any time by pushing the left button. The display will scroll the information and then return to the Process Display mode. To reset these values,
enter the Programming Mode (see page 6), use the left button to get to the CLR MAX/MIN command and press the right button two times. After exiting
the Programming Mode and saving the changes (see page 6), the values will be reset to the current reading and begin cumulative recording again.
OFFSET:
The One Series is factory calibrated to 0.5% of range at room temperature. In some applications it may be necessary to re-calibrate the unit in the field. Offset
allows the user to enter a positive ("POS") or negative ("NEG") offset to the pressure readings. An offset of up to +/- 10% of the range is allowed.
NOTE:
Any numerical value entered other than 0.00 will cause the display to indicate “Offset” just above the process reading in the process display.
WARNING: USE OF THIS OPTION MAY CREATE A CONDITION WHERE THE DISPLAY MAY INDICATE “0.00” WHEN SIGNIFICANT PRESSURE (10% OF RANGE)
EXISTS IN THE SYSTEM. INDEPENDENT VERIFICATION OF THE SYSTEM PRESSURE SHOULD BE DONE PRIOR TO MAINTENANCE ON THE SYSTEM IF
“OFFSET” APPEARS ON THE PROCESS DISPLAY.
SPAN:
The SPAN adjustment allows the user to shift the slope of the calibration curve by +/- 10%.
To adjust Span a reference pressure near full scale should be applied to the unit. The display value and the reference pressure should be noted.
To calculate the number to enter for Span divide the reference pressure by the display reading, then multiply by the full scale pressure range of the One Series.
Span value=(Reference Pressure / Display Reading) x Full Scale Pressure Range of the One Series.
Example: One Series
100 psi range
Reference Pressure
=
100 psi
Display Reading
=
98 psi
100 x 100 = 102 (Enter this number for Span)
98
NOTE:
Span is limited to +/- 10% of the full scale range. Entering a “0” will disable the feature.
WARNING: USE OF THIS OPTION MAY “DE-CALIBRATE” THE UNIT TO SUCH A CONDITION THAT THE PROCESS DISPLAY MAY INDICATE “0.00” WHEN
SIGNIFICANT PRESSURE IS ACTUALLY PRESENT IN THE SYSTEM. INDEPENDENT VERIFICATION OF THE SYSTEM PRESSURE SHOULD BE DONE PRIOR TO
MAINTENANCE ON THE SYSTEM IF “OFFSET” APPEARS ON THE DISPLAY.
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