Fluke RPM4 manual POWER-UP and Verification, Turn OFF Absolute and Negative Gauge Mode Axxx RPT

RPM4™ OPERATION AND MAINTENANCE MANUAL

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.

2.4POWER-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.

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