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Automated Pressure Calibrator
Pressure Control Settings
41
Slew Rate (Rate of Pressure Change)
Slew Rate is a user-defined maximum pressure rate of change. The Product
controls this pressure with minimum overshoot into a wide variety of external
volumes at its highest slew rate. In most applications Fluke Calibration
recommends to set the slew rate at its maximum rate value. This provides the
highest speed control without jeopardizing overshoot or control stability
properties. In applications where the device under test could be damaged by high
rate of pressure change, it can be necessary to slow down the slew rate (control
speed). The Product control algorithm limits the rate of pressure change to the
slew rate. On calibrators with full-scale pressures ranges <10 psi (70 kPa), it is
common to reduce the slew rate to <25 % of full scale/min to improve on control
overshoot characteristics.
Safety Limits
The Product has user-configurable safety limits that protect the UUT from being
inadvertently over-pressured (>Control Setup>Safety Limits).
Upper Limit
The upper limit is a safety limit that protects the UUT from being inadvertently
over-pressured. The upper limit is typically set just over the full-scale pressure of
the UUT. If a Setpoint greater than the user-defined upper limit is entered, the
Product does not accept the value and generates an error code. While in Control
mode, if pressure exceeds the user-defined limit, the Product changes to
Measure mode and shows an error message.
Lower Limit
This is the same as the high limit except it protects the UUT from low pressure
limits.
Auto Vent
This is the defined maximum pressure that the Product can reach prior to venting
the test port to atmosphere.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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