Filter
Top Products
RPM4™ OPERATION AND MAINTENANCE MANUAL
© 2004-2007 DH Instruments, a Fluke Company Page 12
2.3.8 TURN OFF ABSOLUTE AND NEGATIVE GAUGE MODE
(AXXX RPT)
If your RPM4 has one or two Axxx (absolute) Q-RPTs, it is able to operate in
gauge, negative gauge and absolute measurement modes (see Section 3.3.3).
If the RPM4 will be used in gauge mode only, the other measurement modes can
be turned off so they are no longer accessible. Turning off modes that are not
needed can avoid confusion and/or accidental use of the wrong measurement mode.
See Section 5.2.5 for complete information on turning off absolute and negative
gauge measurement modes.
Turn off absolute and negative gauge mode if desired.
2.3.9 SDS FULL TIME OFF
Gas operated Q-RPT modules of A7M or less, include the SDS Self Defense
System (see Section 3.2.7) to shut off the Q-RPT from the TEST(+) port. If this
function is not desired, SDS can be turned full time off so that in regular
operation, SDS is not present. With SDS full time off, the SDS overpressure
protection is still active.
See Section 3.5.4.2 for instructions on turning SDS full time off if desired.
2.3.10 PARALLEL MEASUREMENT MODE
If your RPM4 has two Q-RPTs of the same type (Axxx, Gxxx, BGxxx), it supports
parallel measurement mode in which both RPTs are used simultaneously to
measure a common pressure, statistically reducing uncertainty in the
measurement. Parallel measurement creates a new Q-RPT, designated <HL>,
which is the combination of the Hi and Lo Q-RPTs. See Section 3.2.4 for
complete information on parallel measurement mode.
Turn on parallel measurement mode if desired.
2.4 POWER-UP AND VERIFICATION
2.4.1 SWITCH POWER ON
Actuate the power switch on the RPM4 rear panel (if a 12 VDC power supply is already connected
to the 12 VDC connection, RPM4 power is already on). Observe the front panel display as
RPM4 initializes, error checks and goes to the MAIN RUN screen (see Section 3.1.1).
RPM4 default power-up condition is Hi Q-RPT active, SDS closed if present.
If the RPM4 fails to reach the MAIN RUN screen, service is required. Record the sequence
of operations and displays observed.
If the RPM4 Q-RPT module is equipped with SDS, SDS is CLOSED at power up and the
TEST(+) port is shut off. This causes <SDS CLOSED> to be flash periodically in the main
run screen in place of the measured pressure value.