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2271A
Operators Manual
28
Set Target Pressure (Setpoint)
Target pressure (Setpoint) is the numerical value of the pressure that the Product
controls on command. Enter the Setpoint number into the Setpoint field while in
any of the operation modes (Measure, Control, and Vent). The Product controls
pressure to the Setpoint in Control mode only. While in the Control mode, if a
new Setpoint number is entered and accepted, the Product immediately controls
to the Setpoint. Once at the Setpoint, the Product then uses the active Control
mode to keep the pressure between the upper and lower limits. See the Control
Modes section.
Note
Changing the pressure with the Jog Knob adjusts the Setpoint value
in any mode but will only actively change the applied pressure while
in Control mode. See the subsequent section for more information
on jogging pressure.
To set a setpoint pressure:
1. Push to activate the field.
2. Use the numeric keyboard to enter the number.
3. Push
to accept. It is not necessary to push to enter a new value, just
type in the new value and it overwrites the previous value.
Note
Pressure will not change until Control is activated.
Step Pressure Up or Down
Use the Step function to change the pressure Setpoint. The Step function is used
primarily when taking pressure steps in equal pressure increments and is only
available in Control mode. All step controls are accessed in the SETPOINT
menu. The size of the pressure step is user-defined in the Control Settings menu.
To modify the step size, push SETPOINT, select Step Size, and use the keypad
to enter a step value. Then use the up and down arrows to step that amount.
Jog Pressure
Use the Jog function when calibrating mechanical gauges such as a dial gauge
and to change the pressure until the mechanical gauge indicates a cardinal point.
The higher resolution Calibrator is then read to determine the actual pressure
value when the mechanical gauge indicates a cardinal point. To jog the pressure,
turn the Jog Knob clockwise or counter-clockwise to increment or decrement the
pressure by the lowest significant digit of the active measurement resolution. For
example, for a measurement resolution of 0.01 psi, turning the Jog Knob
increments the pressure by 0.01 psi per knob detent.
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