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3. OPERATION
Page 35 © 2004-2007 DH Instruments, a Fluke Company
RPT If the RPM4 has two Q-PRTs, allows pressure measurement from the two
RPTs to be displayed simultaneously (see Section 3.3.6.4). This function is
particularly useful in dual Q-RPT RPM4s with independent TEST ports to
monitor two separate pressures simultaneously. It is also used to when the
Hi Q-RPT is in differential measurement mode, to observe the line pressure
measured by the Lo Q-RPT.
HI/LO Records and displays maximum and minimum pressures measured (see
Section 3.3.6.5). This function is used to keep track of the minimum and
maximum pressure observed in a system over a period of time or to monitor
if a pressure min/max limit has been exceeded..
FREEZE Captures and displays the pressure measured by the active range of RPM4
when the [ENT] key is pressed (see Section 3.3.6.6). This function is useful
to record the pressure present at the time of an operator observed trigger
event, for example when the needle of an analog gauge was on the nominal
point or when a switch activates.
CLEAN Blanks out the second line of the display (see Section 3.3.6.7). This function
is used when a simple display of pressure measured by the RPM4 active
range without additional information is desired.
OPERATION
To set the DISPLAY function press [DISPLAY] from the main run screen.
The display is:
1avg 2rate 3dev 4RPT
5HiLo 6freeze 7clean
The cursor is on the active DISPLAY function. Selecting a display function returns to the
main run screen with the selected function active.
Display menu choices include:
<1avg> Display average pressure and standard deviation. Specify averaging time period
(see Section 3.3.6.1).
<2rate> Display pressure rate of change (see Section 3.3.6.2).
<3dev> Display deviation of the measured pressure from a target value and specify
the target value (see Section 3.3.6.3).
<4RPT> Display the pressure measured by the second Q-RPT in RPM4s with two
Q-RPTs (see Section 3.3.6.4).
<5HiLo> Display the maximum and minimum pressure observed since HiLo reset
(see Section 3.3.6.5).
<6freeze> Capture and display the value measured when [ENT] is pressed
(see Section 3.3.6.6).
<7clean> Leave the second line of the display blank (see Section 3.3.6.7).
The DISPLAY selection is NOT range specific. A DISPLAY selection made in one range
applies to all ranges.
The default DISPLAY function is Rate which causes the second line of the display to show “R”
followed by the current rate of change of pressure in current pressure units per second.
The default DISPLAY function in differential mode is RPT.