Sierra SL-800 instruction manual Vacuum Comparison of Cal=Trak with Piston or Bell Provers

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Gas

Fixed

Adjustable

Sonic

Supply

Regulator

Regulator

Nozzle

OR Porous Plug	Cal=Trak
OR Porous Plug	DryCal
Stable Pressure
Stable Pressure
> 200 kPa

Figure 6 Alternative Setup for Piston Provers

Piston or Bell Prover

7.2Vacuum Comparison of Cal=Trak with Piston or Bell Provers

The Cal=Trak operates similarly in both pressure and suction applications. Sometimes, however, users wish to compare the Cal=Trak under suction (vacuum) conditions. With a piston or bell prover, the setup of Figure 7 can be used. Note that the inlet to the Cal=Trak is at atmospheric pressure.

The restrictor should be sized to provide a drop of at least 70 kPa (21 inches or 500 mm Hg). The purpose of the restrictor is to render the piston insertion pressure change (0.1 kPa) relatively insignificant, as in the similar pressure calibration methodology.

In volumetric, comparisons, it is important to compensate for the difference in outlet temperature from input temperature. Although the pressure is the same on each end, the restrictor and the pump affect the outlet temperature and flow must be normalized to the inlet (ambient) temperature.

Restrictor

Vacuum Pump

DryCal

Cal=Trak

Figure 7 Vacuum Setup for Piston or Bell Provers

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Contents Cal=Trak SL-800 Primary Gas Flow Calibrator Worldwide Locations to Serve You Table of Contents Page Theory of Operation General DescriptionIdealized Automatic Piston Prover Your Cal=Trak SL-800 Base Includes Cal=Trak Layout Unpacking ChecklistEach of Your Cal=Trak SL-800 Flow Cells Includes Connecting the Cal=Trak to a Flow Source Cal=Trak Installation Attaching & Removing Flow CellsCal=Trak Measurement Cycle Attaching Flow CellsInitial Pressure Pulse Timing KPa Begins Ends Inventory Dead Volume Application PrecautionsComparison vs. Calibration Initial Pressure PulseSetup for Piston or Bell Provers Vacuum Comparison of Cal=Trak with Piston or Bell Provers Alternative Setup for Piston ProversComparison of Cal=Trak with Sonic Nozzle Transfer Standards Setup for LFEsCalibration of Mass Flow Controllers MFCs Vacuum Setup for Sonic Nozzle Transfer StandardCalibration of Rotameters Variable Area Flow Meters Calibration of Mass Flow Meters MFMsOperating Instructions Charging the Cal=Trak BatteryTurning the Cal=Trak On Turning the Cal=Trak OffLow Battery Indicator Cal=Trak Keypad How To Use the Cal=Trak KeypadGeneral Menu Navigation Parameters Factory Settings Optional Settings Factory Default SettingsTaking Readings Option 1, Sensor Factor Setting User PreferencesSetup Menu 4, Date, Time & Battery Voltage Setup Menu 2, Reading Type, # in Average & Minutes/ReadingOption 1, Date Setup Menu 5, Date & Time FormatsOption 2, Time Option 3, Auto OffBattery Maintenance & Storage Battery SystemMaintenance To Initiate the Leak Test Quality Assurance Leak Test ProcedureLeak Test Illustration Leak Test in Progress CalibrationReplacement Parts & Accessories Returning Your Unit for Calibration or Service ShipmentCalibration Includes Part DescriptionAdditional Information Limited Warranty Settings have been lost or seem to have changed Charge LED does not light when charger pluggedPiston Error appears on display Unit suddenly turns offWhen taking readings, the flow seems off Piston does not move when the Read or Auto is pushedDuring Leak Test, Leakage 9.999 ccm appears on display Contact Sierra for Assistance Resetting the Cal=TrakFlow Cell Standardized 15-30C Model Optimum Flow RangeIntroduction Installation Operating Instructions for Cal=Soft SoftwareRequirements Worksheet descriptionsIntroduction Setup Cal=TrakSetup Cal=Soft Setup DUTPage Page Automatic Flow Calibration Using Sierra 100 Series MFC Serial Port Selection Issue Software TroubleshootingSerial Port Configuration Issue