Sierra SL-800 instruction manual Piston does not move when the Read or Auto is pushed

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1A The piston is not reaching the bottom in the time allotted by the program.

•Push any key to return to the Read Screen.

•If you want the Cal=Trak to start taking readings again, press Read or Auto. 1B The piston does not return to the bottom of the cell at all.

•The flow rate may be too high for the cell being used, make sure that the flow is in the specified range.

•Water vapor may have condensed inside the cell if the cell has been moved from one location to another. Allow the cell to come to ambient temperature and the piston should fall naturally as the condensation evaporates.

•The flow cell may have been used with a gas other than air or nitrogen. Some gases are naturally “sticky”. If you have used the cell with another gas, run nitrogen gas to the inlet port at a pressure below 5 psig while keeping the outlet port open to atmosphere. The nitrogen gas will slowly purge out the “sticky” gas previously used and the piston will return to the bottom of the cell.

A-8.0 The piston does not move when the “Read” or “Auto” is pushed

1Is the cell connected to the base?

2Is a flow source connected?

3Is the flow source connected correctly (Pressure vs. Vacuum)?

4Is the flow source inadvertently set too low?

5Are any of the ports sealed?

6Are any of the tubes pinched?

7Are any of the connections loose or leaking? This can happen especially easily with Swagelok fittings.

8Can you hear the valve working? If not, contact Sierra.

A-9.0 When taking readings, the flow seems off.

1Are any of the connections loose or leaking? (Swagelok fittings are especially prone to this.)

2Are any of the tubes pinched?

3Is the gas constant set to the correct number? See Section 8.1, Setup Menu 1, Calibration ID #, Gas Constant, Calibration Type.

4If you are using the cell within bottom 10% of its flow rating with a gas other than air, check to make sure the LCF (Leakage Correction Factor) is set correctly. See Section 8.6, Setup Menu 6, Leakage & LCF.

5Make sure your standardized temperature matches the current DUT. If a standardization temperature of 21C is used with a DUT having a standardization temperature of 0C, an error of approximately 7.5% can result.

A-10.0 Readings taken with the Cal=Trak do not correlate to those taken with another flow meter

Please check previous question. If that does not solve your problem, please check the following:

1Are you comparing volumetric flow with standardized flow? See Section 8.1, Setup Menu 1, Calibration ID #, Gas Constant, Calibration Type.

2If both units are set to “Standardized”, are both units set to the same standardized conditions? See Section 8.3, Setup Menu 3, Temp. Correction Factor, Temp. & Pressure Formats. If a standardization temperature of 21C is compared against a standardization temperature of 0C, an error of approximately 7.5% can result.

3Are there any large containers in the flow stream, such as extra tubing, large damper(s), Magnehelic gauges, etc.? These items can cause inaccurate readings.

4Is the flow source strong enough that it will not be affected by small variants of back pressure?

A-11.0 During Leak Test, “Leakage > 9.999 ccm” appears on display

1Check for poor connections on either the pressure or suction port.

2Make sure all fittings are tight.

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Contents Cal=Trak SL-800 Primary Gas Flow Calibrator Worldwide Locations to Serve You Table of Contents Page General Description Theory of OperationIdealized Automatic Piston Prover Cal=Trak Layout Unpacking Checklist Your Cal=Trak SL-800 Base IncludesEach of Your Cal=Trak SL-800 Flow Cells Includes Cal=Trak Measurement Cycle Cal=Trak Installation Attaching & Removing Flow CellsConnecting the Cal=Trak to a Flow Source Attaching Flow CellsInitial Pressure Pulse Timing KPa Begins Ends Comparison vs. Calibration Application PrecautionsInventory Dead Volume Initial Pressure PulseSetup for Piston or Bell Provers Alternative Setup for Piston Provers Vacuum Comparison of Cal=Trak with Piston or Bell ProversSetup for LFEs Comparison of Cal=Trak with Sonic Nozzle Transfer StandardsVacuum Setup for Sonic Nozzle Transfer Standard Calibration of Mass Flow Controllers MFCsCalibration of Mass Flow Meters MFMs Calibration of Rotameters Variable Area Flow MetersTurning the Cal=Trak On Charging the Cal=Trak BatteryOperating Instructions Turning the Cal=Trak OffCal=Trak Keypad How To Use the Cal=Trak Keypad Low Battery IndicatorGeneral Menu Navigation Factory Default Settings Parameters Factory Settings Optional SettingsTaking Readings Setting User Preferences Option 1, Sensor FactorSetup Menu 2, Reading Type, # in Average & Minutes/Reading Setup Menu 4, Date, Time & Battery VoltageOption 2, Time Setup Menu 5, Date & Time FormatsOption 1, Date Option 3, Auto OffBattery System Battery Maintenance & StorageMaintenance Quality Assurance Leak Test Procedure To Initiate the Leak TestCalibration Leak Test Illustration Leak Test in ProgressCalibration Includes Returning Your Unit for Calibration or Service ShipmentReplacement Parts & Accessories Part Description Additional Information Limited Warranty Piston Error appears on display Charge LED does not light when charger pluggedSettings have been lost or seem to have changed Unit suddenly turns offPiston does not move when the Read or Auto is pushed When taking readings, the flow seems offDuring Leak Test, Leakage 9.999 ccm appears on display Resetting the Cal=Trak Contact Sierra for AssistanceModel Optimum Flow Range Flow Cell Standardized 15-30CRequirements Installation Operating Instructions for Cal=Soft SoftwareIntroduction Worksheet descriptionsSetup Cal=Trak IntroductionSetup DUT Setup Cal=SoftPage Page Automatic Flow Calibration Using Sierra 100 Series MFC Software Troubleshooting Serial Port Selection IssueSerial Port Configuration Issue
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