Fluke RPM4 manual SET-UP and Preparation

RPM4™ OPERATION AND MAINTENANCE MANUAL

•Measurement uncertainty of ± 0.008 % of reading for Standard Class Q-RPTs or ± 0.005 % of reading for Premium Class Q-RPTs. A standard with higher measurement uncertainty may be used but RPM4 measurement uncertainty may be degraded proportionally from published specifications.

•If the Q-RPT is Axxx (absolute) and will be used in the absolute and/or negative gauge measurement modes, the reference must be able to apply absolute pressures: Absolute pressures may be defined by adding atmospheric pressure measured by a barometer to gauge pressure defined by a piston gauge. Axxx (absolute) Q-RPTs that will not be used in absolute or negative gauge measurement modes (as is very often the case for higher pressure Q-RPTs) do not require the application of absolute pressure for calibration and may be calibrated using a gauge pressure standard.

Axxx (absolute) Q-RPTs calibrated in gauge measurement mode by applying gauge reference pressure values should be used in gauge mode only (see Sections 3.3.3,  PRINCIPLE, 5.2.5).

•Able to supply the recommended sequence of pressure points in the range to be calibrated: See Section 5.2.4 for information on the recommended calibration point sequence for various Q-RPT types and classes.

5.2.3 SET-UP AND PREPARATION

To set-up and prepare an RPM4 for calibration of a Q-RPT:

Set the RPM4 on a stable surface near the calibration standard at a height as close as possible to the calibration standard’s reference height. Consider the connections that may need to be made to the rear panel and access to the front panel display and keypad.

Connect the calibration standard output to the TEST(+) port of the Q-RPT module to be calibrated on the RPM4 rear panel (1/8 in. NPT F or DH500F depending on range, see Section 2.3.5).

If the Q-RPT module has a TEST(-)port, leave it unobstructed or connect it to the reference standard’s TEST(-)port if available.

Open SDS (Self Defense System) if present (see Section 3.3.8) for the Q-RPT to be calibrated. When the RPM4 indicates <SDS CLOSED>, the TEST(+) port is isolated from the Q-RPT to be calibrated.

Opening SDS with a pressure greater than Pmax! applied to the test port may cause overpressure damage to the Q-RPT.

The Q-RPTs of RPM4s used in parallel measurement mode must be adjusted separately. PA and PM for the Hi and Lo Q-RPT need to be determined and set individually. Therefore, data to be used in determining calibration coefficients cannot be taken in parallel mode (see Section 3.5.7.3). Do not run a calibration with the HL (parallel mode) Q-RPT active.

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