Fluke RPM4 manual Remote ENT Connection Footswitch or Other Switch

RPM4™ OPERATION AND MAINTENANCE MANUAL

2.3.4 REMOTE [ENT] CONNECTION (FOOTSWITCH OR OTHER SWITCH)

Connect the optional remote ENTER footswitch, if available or a user supplied switch fitted to the optional cable (see Section 7.1). Connect the cable to the RPM4 rear panel connection labeled REMOTE ENTER. Activating the switch is equivalent to pressing the [ENT] key on the front panel (see Section 3.1.3).

2.3.5 CONNECTING TO MEASURE PRESSURE (TEST(+) AND TEST(-) PORTS)

Using a pressure connecting hose or tube of appropriate pressure rating, connect the device or system to be tested to the RPM4 TEST(+) port.

The RPM4 TEST(+) connection is 1/8 in. NPT female (Q-RPTs of A70M or lower) or DH500 F (Q-RPTs higher than A70M).

DH500 is a gland and collar type fittings for 6.35 mm (1/4 in.) coned and left hand threaded tubes. DH500 is equivalent to AE F250C, HIP HF4, etc.

The TEST(+) and TEST(-) ports on Q-RPT modules of A70M and lower are threaded into the aluminum Q-RPT manifold. Take care in making and breaking fittings not to cross thread or otherwise damage the threads. It is recommended that an adaptor be installed in the in Q-RPT manifold and make break operations be made on the adaptor rather than the manifold.

SDS Self Defense System: Q-RPT modules designated A7M or lower include the SDS Self Defense System. SDS, operated properly, allows a the Q-RPT TEST(+) port to be left connected to a pressure up to 10 MPa (1 500 psi) without damage to the Q-RPT. Do NOT attempt to use SDS in this manner without first becoming thoroughly familiar with its operation and limitations (see Sections 3.2.7, 3.3.8, 3.5.4).

Q-RPT MODULE TEST(+) AND TEST(-) PORTS

Q-RPT modules of A70M and lower have both TEST(+) and TEST(-)ports. Q-RPT modules greater than A70M have a TEST(+) port only. See Section 5.6, Figure 8 for RPM4 Q-RPT module TEST port configurations.

The TEST(+) port is connected to Axxx (absolute) Q-RPTs’ sole measurement port and to the high side of Gxxx or BGxxx (gauge or bi-directional gauge) Q-RPTs.

The TEST(-)port of Axxx and BGxxx Q-RPTs is connected to RPM4’s internal barometer. The TEST(-)is connected to the low side of Gxxx (gauge) or Gxxx (bi-directional gauge) Q-RPTs.

•When operating in absolute mode: The TEST(-) port, if present, is left open to atmosphere.

•When operating in gauge or negative gauge mode with a range greater than 50 kPa (7.5 psi): The TEST(-) port, if present, is normally left open to atmosphere. A possible exception is when the device or system under test is in an ambient pressure that may differ significantly from the ambient pressure around the RPM4. For example, if the RPM4 is measuring the pressure applied to DUTs in an environmental chamber, the pressure in the environmental chamber may be different from ambient pressure around the RPM4. In this

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