Elmack Engg Services | Test and Measurement Distributors

Fluke Calibration

Fluke Molbloc-S Sonic Nozzle Calibration Device

Model No :

Fluke Cal-molbloc-S

Part Code :

Please contact us for final configuration

Overview

The Fluke Cal Molbloc-S® Sonic Nozzle Flow element is a high precision transfer standard intended for calibrating other transfer standards or process flow meters and controllers. This sonic nozzle calibration device is used with molbox1+ or molbox RFM™ terminals to extend the range of molbloc/molbox™ calibration systems and deliver superior accuracy at medium and high flows. Existing molbox1 terminals with version 4.0 embedded software or later and all molbox1+ terminals can be used with molbloc-S.

Features

- Covers ranges up to 5,000 slm in N2 and air
- Useable with molbox1+, or existing molbox1 and molbox RFM mass flow terminals and COMPASS software
- Proven critical flow venturi (sonic) nozzle operating principle supported by gravimetric calibration
- Minimal sensitivity to contamination
- Measurement uncertainty:
• to ±0.125% of reading with molbox1+
• ± 0.2 % of reading with molbox1
• ± 0.5 % of reading with molbox RFM
- Air, N2, Ar, He and other calibrations available, humid air density compensation supports use with ambient air

Major Applications

- Gas Flow calibration
- Calibration of compressed gas Flow meters

Technical Specifications

- Range: Dependent upon molbloc size and pressure calibration range (see molbloc-S Ranges table)
- Required Back Pressure Ratio: 0.4 to 0.9 depending on Reynolds number
- Calibration Gases: Standard: Dry air : Optional: N2 (to replace standard air calibration or in addition), Ar, H2, He, N2O. Consult factory regarding availability of availability of these gases for specific ranges, or for other gases
*Dry air calibration is required for humid air operation
- Molbloc-S Pressure Calibration Ranges:
• Low Pressure (LP): 20 to 200 kPa absolute (3 to 30 psia) upstream
• Standard Pressure (SP): 50 to 500 kPa absolute (7 to 70 psia) upstream
- High Pressure (HP):
• 200 to 2 MPa absolute (30 to 300 psia) upstream

General Specifications

- Normal Operating Temperature Range : 15 to 35 °C
- Storage Temperature Range : -25 to 35 °C
- Normal Operating Pressure Range: 20 to 200 kPa absolute (3 to 30 psia) or 50 to 500 kPa absolute (7 to 70 psia) upstream, or 200 to 2000 kPa (30 to 300 psia) with molbox1+S only
- Overall Flow Range: <1 to 5 000 slm

Manufacturing details:

https://as.flukecal.com/products/flow-calibration/gas-flow-standards/molbloc-s-sonic-nozzle-calibrat