Fluke A70M User Manual

 

Page 137 

© 2007 DH Instruments, a Fluke Company 

A type of Q-RPT with a built-in vacuum reference that is intrinsically absolute (e.g. A10M).  
Axxx Q-RPTs support absolute, gauge and negative gauge measurement modes. 

Measurement mode in which the Q-RPT indicates absolute pressure (difference from vacuum). 

The Q-RPT that is currently selected to be displayed on the top line of the RPM4 
display.  Most function selections affect the active Q-RPT. 

A function that optimizes RPM4 measurement and control for a specific, user defined 
range of operation. 

An RPM4 pressure measurement range created using the AutoRange function. 

RPM4 on-board automated testing sequences and their results. 

A process by which a Q-RPT and measurement mode is rezeroed (offset) relative to a standard. 

RPM4’s on-board atmospheric pressure measuring sensor.  Also referred to as on-board barometer. 

A type of Q-RPT that is intrinsically gauge and is capable of operating bi-directionally, 
above and below atmosphere, through zero.  BGxxx Q-RPTs support gauge and 
negative gauge measurement modes. 

A Q-RPT’s maximum range that is always available using [RANGE] and cannot be deleted. 

A DISPLAY function in which the deviation of the current pressure from a target pressure 
is displayed. 

Device Under Test.  The device or devices pneumatically connected to the RPM4 
TEST(+) port that the RPM4 is being used to test or calibrate. 

Measurement mode in which the measured pressure is the different between the Hi and 
Lo Q-RPT (Hi – Lo).  

Abbreviation of “full scale”.  The full scale value is the maximum pressure of a measurement 
range.  Limits and specifications are often expressed as % FS.  Also see span. 

A type of Q-RPT that is intrinsically gauge but only measures pressure greater than 
atmosphere.  Gxxx Q-RPTs support gauge measurement mode only. 

Measurement mode in which the Q-RPT indicates gauge pressure (difference from 
atmospheric pressure), but only in the positive direction (above atmosphere). 

A difference in height between the RPM4 reference level and the DUT. 

A DISPLAY function in which the highest and lowest pressure measurements since 
reset are recorded and displayed. 

The designation of a single Q-RPT in an RPM4, or, if there are two, the one that has the 
highest full scale default range.  This is the A70M (10 

000 

psi) in the RPM4 

A70M/A20M-AF. 

The designation of the pseudo Q-RPT that results from the combination of using two Q-
RPTs simultaneously in parallel measurement mode. 

High pressure mounting system: Bracket used to hold the RPM4 and isolate the Lo Q-
RPT from the test pressure when it is not in use. 

In an RPM4 with two Q-RPTs, the Q-RPT that is not currently displayed on the top line 
of the display.  The inactive Q-RPT may be displayed on the second line of the RPM4 
display using the Q-RPT DISPLAY function. 

The designation of a the Q-RPT with the lower full scale default range in RPM4s with 
two Q-RPTs.  This is the A20M (3 000 psi) in the RPM4 A70M/A20M –AF. 

Whether pressure is being measured relative to absolute zero or vacuum (absolute mode) 
or relative to atmospheric pressure (gauge mode). 

Measurement mode in which the Q-RPT indicates gauge pressure (difference from 
atmospheric pressure), in both positive and negative directions (above and below 
atmosphere).