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RPM4™ OPERATION AND MAINTENANCE MANUAL
© 2004-2007 DH Instruments, a Fluke Company Page 132
SYMPTOM PROBABLE CAUSE SOLUTION
The Q-RPT range does not cover the desired
AutoRange.
Check that Q-RPT default range is high
enough to cover the AutoRange. Table 1
The specified operating mode is absolute or
negative gauge and absolute and negative
modes are OFF for the desired Q-RPT
Check that absolute/negative gauge is ON
for the Q-RPT. 5.2.5
AutoRange is not selecting the
desired Q-RPT for the specified
range.
The Q-RPT is Gxxx (gauge only) and the
specified operating mode is absolute or
negative gauge..
Check that the Q-RPT type supports the
desired measurement mode. 3.3.3
Range will NOT change. Displays
“Pressure on Hi (or Lo) RPT
exceeds RR upper limit”.
The pressure currently applied to the range
that is being selected exceeds the UL (upper
limit) set for that range.
Reduce pressure applied to test port to
less than UL of target range. 3.4.4
Pressure display is flashing and
beeper is sounding intermittently.
Current upper limit of active range has been
exceeded.
Reduce pressure. Change UL and/or
active range if needed. 3.4.4
Pressure display is flashing and
beeper is sounding intermittently
while operating in differential
mode.
Differential pressure upper limit OR Hi Q-
RPT upper limit is exceeded.
Reduce differential pressure and/or
pressure on Hi Q-RPT to be less than
upper limit values or change upper limit
value(s). 3.4.4, 3.3.3.1
Pressure display is NOT flashing
and beeper is sounding
intermittently while operating in
differential mode.
Lo Q-RPT upper limit is exceeded. If Lo Q-
RPT is displayed on second line, its
measured pressures is flashing.
Reduce pressure on Lo Q-RPT or
change its upper limit. 3.4.4, 3.3.3.1
“Hi (or Lo) RPT EXCEEDED
PMAX” displays alternating with
normal display.
RPM4 Q-RPT has been overpressured
(Pmax! exceeded).
Correct the overpressure condition and
cycle power ON and OFF to clear.
3.4.4.1
Rapid beeping for 8 seconds and
<Check RPT connection>
displayed in second line.
RPM4 is in parallel measurement mode and
the disagreement in pressure measured by
the two Q-RPTs indicates they may not be
connected in parallel.
If parallel measurement mode is not
desired, change ranges or turn it off.
If parallel measurement is desired,
check that the Hi and Lo Q-RPTs are
connected to the same pressure.
Ignore if having the two Q-RPTs on two
different pressures is intentional. 3.5.7.3
A Ready (green Ready/Not Ready
indicator) indication is never
achieved.
Stability settings is too tight and/or existing
conditions will not allow Ready to be
achieved.
Adjust stability setting or correct other
conditions. 3.4.3, 3.2.1
Cannot select absolute or negative
gauge measurement mode.
Q-RPT is Gxxx and does not support
absolute and gauge measurement modes or
Operation is normal. 3.3.3
Cannot select differential
measurement mode.
RPM4 must have two Q-RPTs of the same
type (Axxx, Gxxx, BGxxx) and the current
range must be the default range (<DF>) of
the Hi Q-RPT for differential measurement
mode to be available.
If RPM4 has two Q-RPTs of the same type,
set the default range of the Hi Q-RPT.
3.3.3.1
Q-RPT is Axxx (absolute) but
cannot select absolute or negative
gauge measurement mode.
Absolute and negative gauge measurement
mode have been turned off in the calibration
function.
Check that absolute/negative gauge is ON
for the Q-RPT. 5.2.5
Display update rate of indicated
pressure changes when changing
pressure.
RPM4 automated read rate function is ON to
automatically adjust read rate depending
upon rate of change of pressure.
Operation is normal. Turn automated
read rate function OFF if desired. 3.5.7.2
Pressure is changing but display
of pressure is NOT and the
bottom right hand corner of the
display is a numerical countdown
followed by <avg>.
Average DISPLAY function is ON and
pressure display is updating only with the
average value at the end of each averaging
cycle.
Go to a DISPLAY function other than
average or press [+/-] to get the
instantaneous value Average DISPLAY.
3.3.6
Display update of indicated
pressure is too slow when
pressure is changing quickly.
RPM4 automated read rate function is OFF.
Turn automated read rate function ON to
automatically adjust read rate depending
on pressure rate of change. 3.5.7.2
Pressure measurement seems
erratic when measuring gas
pressure.
The RPM4 and/or the connection to the test
system is contaminated with liquids.
Purge and clean affected systems.
Contact DHI Authorized Service
Provider if RPM4 is contaminated
internally. Table 29
Pressure indicated by RPM4
never becomes stable.
These is a leak in the pressure system to
which RPM4 is connected.
Find and correct leak. Consider using
RPM4 leak check function. 3.3.5