Teledyne NALL - Manuals

Manual 111-082010_Nall Mass Flowmeters Page 6 of 23 2.0 OPERATING PRINCIPLE 2.1 Operating Principle Hastings Linear Mass Flowmeters operate on a unique electrical principle whereby a capillary tube is heated uniformly by a transformer. The temperature distribution is symmetrical about the midpoint a...

Manual 111-082010_Nall Mass Flowmeters Page 7 of 23 3.0 RECEIVING AND INSPECTION 3.1 Initial Inspection: Carefully unpack the Hastings Linear Mass Flowmeter and inspect it for any obvious signs of damage due to shipment. Immediately advise the carrier who delivered the shipment of any suspected dama...

Manual 111-082010_Nall Mass Flowmeters Page 8 of 23 4.0 INSTALLATION INSTRUCTIONS. 4.1 TRANSDUCER 4.1.1 Orientation of the Transducer The transducer may be mounted in any position, as long as the direction of gas flow through the transducer is from “IN” to “OUT” as marked on the transducer base. (U-...

Manual 111-082010_Nall Mass Flowmeters Page 10 of 23 4.4.3 Electrical Zero Check Turn the power supply “ON” and allow the flowmeter 30 minutes to warm up. Stop all flow through the transducer and check the electrical zero. CAUTION: DO NOT ASSUME THAT ALL METERING VALVES WILL COMPLETELY SHUT OFF FLOW...

Manual 111-082010_Nall Mass Flowmeters Page 11 of 23 5.0 USING THE FLOWMETER USING THE HASTINGS LINEAR MASS FLOWMETER 5.1 Warm-Up Time: When the flowmeter is first turned on, the meter will fluctuate somewhat before settling to a stable indication. The flowmeter indicates the mass flow to +/- 3% of ...

Manual 111-082010_Nall Mass Flowmeters Page 14 of 23 6.0 PRESSURE EFFECTS 6.1 Standard Transducers: The Hastings Linear Mass Flowmeter can measure mass flow accurately without corrections for a variation in line pressure from one psia (.068 ATM) to 250 psig (18 ATMS.) Mass flow indications are possi...

Manual 111-082010_Nall Mass Flowmeters Page 15 of 23 7.0 TEMPERATURE EFFECTS 7.1 Ambient Temperatures: 7.1.1 Transducer In order to maintain the accuracy of the flowmeter with changes in ambient temperature, it is necessary to keep the temperature of the transducer between 10° C and 50° C. (The temp...

Manual 111-082010_Nall Mass Flowmeters Page 16 of 23 8.0 DIFFERENTIAL PRESSURE 8.1 TYPICAL PRESSURE DROPS The differential pressure drop (DP) across the Hastings HS-Series Mass Flow Transducer can vary between 0.50” H2O depending upon the transducer’s range. Other pressure drops are listed below and...

Manual 111-082010_Nall Mass Flowmeters Page 18 of 23 9.0 Calibration 9.1 CALIBRATION PROCEDURES The Hastings Mass Flowmeter has been carefully inspected and calibrated at the factory before shipment and will give long, reliable service. Calibration is stable, and recalibration is seldom necessary un...

Manual 111-082010_Nall Mass Flowmeters Page 20 of 23 10.0 Maintenance 10.1 Transducers: 10.1.1 Cleaning With proper care in installing and use, the transducer will require little or no maintenance. Should the small passages in the transducer become partially clogged, they can be cleaned with any sui...

Manual 111-082010_Nall Mass Flowmeters Page 21 of 23 11.0 Accessories OPTIONS AND ACCESSORIES 11.1 Double Point Relay Flowmeter/Alarm (DNALL-P): The Hastings Flowmeter/Alarm is a complete Linear Mass Flowmeter with all of its characteristics and ranges. It also includes two adjustable HI-LO set poin...

Manual 111-082010_Nall Mass Flowmeters Page 22 of 23 a) What is the sensitivity of the totalizer? b) What is the total flow indicated by the 13,500 count? c) What is the average flow rate over the 7 hour period? Solution: a) The full scale flow rate for the TNALL-P/HS-10S is 10 SCCM. The full-scale ...

Manual 111-082010_Nall Mass Flowmeters Page 23 of 23 12.0 Warranty and Repair 12.1 Warranty Repair Policy Hastings Instruments warrants this product for a period of one year from the date of shipment to be free from defects in material and workmanship. This warranty does not apply to defects or fail...