DH Instruments E-DWT-H, Operation And Maintenance Manual

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E-DWT-H OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 38
With the Average DISPLAY active the main run screen is:
1. Average measured over last completed
averaging period.
2. Standard deviation of last completed
averaging period.
3. Countdown in seconds until completion of
on-going averaging period.
2007 psi g Hi
δ 0.2 18Avg
The Average DISPLAY has a second screen that allows the instantaneous
pressure readings to be viewed while an averaging cycle is running.
The instantaneous Average screen is:
1. Instantaneous pressure values at RPM4-E-
DWT’s normal update rate.
2. Current rate of change of pressure in pressure
units/second.
3. Countdown in seconds until completion of on-
going averaging period.
2006 psi g Hi
R 0.1/s 18Avg
The [+/-] key toggles between the main run Average screen and the
instantaneous values Average screen.
Note
•
Pressing [ENT] while in the Average DISPLAY aborts the
current averaging period and causes a new one to
begin. [ENT] can thus be use to trigger a new averaging
period on demand.
•
In the Average DISPLAY the Ready/Not Ready indication
applies to the result of the previous averaging period
(see Section 3.1.2). Ready indicates that all readings
during the previous averaging period met the stability
criterion. Not Ready indicates that one or more
readings were outside of the stability criterion.
•
Changing the pressure unit of measure, measurement
mode or range while the averaging screen is active,
starts a new averaging period.
•
To go to a DISPLAY other than Average, press
[DISPLAY] and make a new DISPLAY choice (see
Section 3.7.7).
3.7.7.2 Rate
 PURPOSE
To activate the Rate DISPLAY.
Note
•
See Section 3.7.7,

Principle.
•
The Rate run screen accesses the AutoTest function
(see Section 3.7.11) to AutoRange RPM4-E-DWT based
on DUT characteristics. To access AutoTest, press
[ENT] from the Rate run screen.