# Presentation: 207154

## NIST Training SeminarAugusta MaineAugust  14-18, 2000

- Loading Rack Meters

## Loading Rack Meters

- EPO No. 25
- Safety
- Pretest Determinations
- Inspection
- Test Notes
- Test Procedure

## Safety

## Safety

- Clothing
- non-Synthetic
- Electrical Hazards
- Exposed wiring
- Sources of Ignition (heat or spark)
- Emergency Procedures
- Phone Numbers for Emergency Services
- Basic First Aid Training
- Eye Protection
- Goggles or Safety Glasses
- Eye Wash

##      Safety Cont.

- Fire Extinguisher
- Portable (20 lb or larger)
- Dry Chemical
- First Aid Kit
- Basic Supplies
- Grounding
- Grounding Cable and lugs
- Skully System

##      Safety Cont.

- Ignition Sources
- Open wiring
- Exposed Lights
- Improper Extension Cords
- Portable Heaters
- Lifting
- Proper Lifting Techniques
- Weight Limitations
- Location
- Condition (wet/slick )
- Obstructions, Overhead Hazards
- Petroleum Products,  Hazardous Materials of Chemicals  (MSDS’s)

##      Safety Cont.

- Material Data Sheets
- Nature of Product
- Personal Protection Equipment
- Safety Shoes
- Protective Clothing, Gloves, Eye Wear, Respirator, Barrier Cream
- Hard Hat
- Safety Cones/Warning Signs
- Static Discharge
- Grounding
- Clothing

##      Safety Cont.

- Support for Prover
- Proper Leveling Jacks
- Wheel Chocks
- Switch Loading
- Diesel Fuel First
- Traffic
- Transportation of Equipment

## Pretest Determinations

## Pretest Determinations

- Prover
- Must have a current calibration certificate
- Seals must be in place
- Design compatible with system (top/bottom loading
- Capacity sufficient to hold one minute flow at max rate and not less than  200 L ( 50 gal )	N.3.5.
- Condition - no dents, rust, water, or foreign material ,   sight glass clean and not leaking
- For top loading prover inlet lower than meter outlet
- Thermometers
- Range 0 0F to 120 0F , 0.5 0F increments, 0.2 0F accuracy

## Pretest Determinations Cont.

- Test Fluid 		N.1.1.
- Same characteristics as that measured  commercially
- Applicable Requirements 	G-T, T.1.
- Basic Tolerances	T.2.3.3.
- Normal tests
- Acceptance tolerance	0.2 %
- Maintenance tolerance	0.3 %
- Special tests
- Acceptance tolerance and
- Maintenance tolerance	0.5 %

## Inspection

## Inspection

- Indicating and recording elements
- Design
- Must have indicating element, may have recording element	S.1.1.
- Units in liters or gallons or binary-submultiples or decimal subdivisions	S1.2., S.1.2.3.
- Readability
- Indicating and recording elements clear, definite, and easily read 	G-S.5., S.1.4., S.1.5.
- Required markings distinct, easily readable and permanent 	G-S.6., G-S.7.

## Inspection

- Indicating and recording elements cont.
- Value of intervals
- Uniform throughout series	G-S.5.3.
- If designed to indicate more than one unit - value must be appropriately identified 	G-S.5.3.1.
- Advancement and return to zero
- Elements may only be advanced if	S.1.3.
- Cannot be stopped until zero is reached or
- Indications are automatically obscured until zero is reached

## Inspection

- Indicating and recording elements cont.
- Provision for sealing
- Provision must be made for sealing electronic adjustable components	        G-S.8.
- A security seal must be affixed to any adjustment mechanism designed to be sealed       G-UR.4.5.

## Inspection

- Measuring elements
- Effective vapor elimination system	S.2.1.
- Vent lines suitably rigid
- Means provided for determination of product temperature		S.2.6.
- Provision for applying security seals to meter and automatic temperature compensating system
- All security seals intact	G-UR.4.5., S.2.2., S2.7.3.

## Inspection

- Installation
- Readily accessible for testing    G-UR.2.3., G-UR.4.4.
- Assistance provided if required
- Liquid cannot be diverted from measuring chamber or discharge line and directional flow  valve are automatic		S.2.3., S.3.1.
- No leaks on meter outlet side	G-UR.4.1., S.3.1.
- Leaks on inlet side noted and called to users attention

## Inspection

- Installation cont.
- System	 and associated equipment installation, and construction do not facilitate fraud  		 G-S.2.
- Installation is proper and does not adversely affect system performance		     G-UR2.1., UR.2.1.
- Actual maximum discharge rate does not exceed manufacturer’s specification 		UR.2.2.

## Inspection

- Selection and use
- Device suitable for application	   G-UR.1.1., G-UR.1.2.
- Design
- Flow rate
- Computing  capability
- Indicating and recording elements
- Value of smallest unit and unit price
- Environment

## Inspection

- Selection and use cont.
- Device and associated equipment operated in manner intended by manufacturer	G-UR.3.1., G-UR.4.1.
- If equipped with mechanical ATCS	  UR.3.6.1.1.
- Connected and operable
- In use at all times

## Inspection

- Marking
- Make, model, and serial number	G-S.1.
- Switches, lights, displays, pushbuttons, controls, and features clearly identified       G-S.6.
- Limitations of use clearly and permanently marked	S.4.1.
- Minimum and maximum discharge rate clearly marked	S.4.3.1.
- Minimum cannot exceed 20 % of maximum

## Inspection

- Devices equipped with ATCS
- Provision to deactivate		S.2.7.2.
- Thermometer well provided for determination of product temperature  S.2.7.4.
- Primary indicating and recording elements marked to show delivered volume has been adjusted to 60 0F	S.4.3.2.

## Test Notes

## Test Notes

- Level Prover
- Level indicators working properly
- Connect safety interlock, ground cable and vapor recovery hose if applicable
- Verify all valves closed and pumping mechanism functioning
- Record totalizer reading
- Before and after each draft

## Test Notes

- Minimize temperature differences between meter and prover		N.2.
- Minimize splashing in top loading provers and maintain fill spout in consistent position
- Examine printed tickets and invoices
- Print after every draft		G.S.5.6.
- Computing type
- Check computations		S.1.7.2.
- Total volume and unit price must accompany total price  either printed or handscript	UR.3.4.

## Test Notes

- Examine printed tickets and invoices cont.
- Check indicated and recorded values for comparability				G-S.5.2.2.
- With ATCS check invoices for         UR.3.6.1.2. a & b
- Notice that volume has been adjusted to 60 0F
- For electronic systems, listing of API gravity, specific gravity, or coefficient of expansion, product temperature, and gross meter reading
- Without ATCS			UR.3.6.2.1., UR.3.6.2.2.
- If adjusted, notice that volume has been adjusted to 60 0F
- Temperature of product used to make adjustment

## Test Notes

- Reading meniscus
- Bottom for transparent liquids
- Top for opaque liquids
- Draining prover
- Lower sight glass
- Close drain valve before liquid reaches zero, wait 30 seconds, open small zero drain valve till zero
- do not readjust
- No lower sight glass
- When drips start wait 30 seconds, close drain

## Test Notes

- Temperature readings
- Read to nearest 0.5 0F
- Use matching thermometers
- Read prover temperature immediately after each accuracy test run
- Average readings if prover has multiple wells
- Read meter temperature
- Thermometer well in measuring chamber or immediately adjacent
- Read at 1/3 and 2/3 of prover capacity

## Test Notes

- Automatic stop mechanism (preset) must stop within one-half the minimum indicated interval             G-UR.4.1.

## Test Procedure

## Test Procedure

- Wet prover
- Empty prover using 30 second drain
- Insert ticket & set preset to prover  volume
- Zero meter
- Start pump then open delivery valve
- At end of each run read prover & determine meter error
- Repeat run if test result is near or out of tolerance

## Test Procedure

- Notes for Repair Personnel
- At least two runs at same flow rate to determine repeatability
- Individual runs within applicable tolerance
- Difference not to exceed 40 % of applied tolerance
- Adjust meter if out of tolerance
- Deactivate ATCS if necessary
- Check performance of temperature sensor

## Test Procedure

- Accuracy tests - *no ATCS*	N.5.
- Normal test - full flow	N.4.1., N.4.1.1., T.2.3.
- Flow rate within meter rating G-UR.3.1., G-UR.2.2.
- Special test - slow flow 	N.4.2., N.4.2.4., T.2.3.
- Fill prover at minimum flow rate marked on meter
- Read temperature at meter and prover make corrections for meter and prover readings

## Test Procedure

- Accuracy tests - *no ATCS*	N.5.
- Normal test - full flow	N.4.1., N.4.1.1., T.2.3.
- Flow rate within meter rating G-UR.3.1., G-UR.2.2.
- Average product temperature at meter - read at  1/3 & 2/3 of prover capacity
- Product temperature in prover
- Correct prover, product in prover, & meter readings for temperature difference from 60 0F

## Test Procedure

- Accuracy tests - *no ATCS**	*N.5.
- Special test - slow flow 	N.4.2., N.4.2.4., T.2.3.
- Fill prover at minimum flow rate marked on meter
- Average product temperature at meter - read at  1/3 & 2/3 of prover capacity
- Product temperature in prover
- Correct prover, product in prover, & meter readings for temperature difference from 60 0F

## Test Procedure

- Accuracy tests of temperature compensated meter - indication in “net” gallons
- Normal full flow test -  *With ATCS* *activated*
- Average product temperature at meter - read at  1/3 & 2/3 of prover capacity
- Only to note large variation
- Product temperature in prover
- Correct prover reading & product in prover for temperature difference from 60 0F

## Test Procedure

- Accuracy tests of temperature compensated meter -  *ATCS* *deactivated*
- Normal full flow test
- Average product temperature at meter - read at  1/3 & 2/3 of prover capacity
- Product temperature in prover
- Correct prover, product in prover, & meter readings for temperature difference from      60 0F

## Test Procedure

- Accuracy tests of temperature compensated meter
- Special test slow flow - *ATCS* *deactivated*
- Average product temperature at meter - read at  1/3 & 2/3 of prover capacity
- Product temperature in prover
- Correct prover, product in prover, & meter readings for temperature difference from      60 0F

## Test Procedure

- Accuracy tests - For meters that display both “net” and “gross” deliveries
- For “gross” delivery indication use correction procedure for meter without temperature compensation for normal & special tests
- For “net” delivery indication use procedure for meter with ATCS for normal & special tests

## Test Procedure

- For system with ATCS
- Difference in meter error with ATCS activated and ATCS deactivated shall not exceed
- 0.2 % for mechanical ATCS and
- 0.1% for electronic ATCS		T.2.3.3.

## Test Procedure

- Security seal
- Provision for security seals 		S.2.2.
- Seals in place & intact		         G-UR.4.5.
- Wet-hose system				S.3.9.
- Check effectiveness of anti-drain valve
- Dry-hose system				S.3.6.
- Check for complete drainage of hose

## Test Procedure

- RFI/EMI
- Test with associated equipment only
- Test only if a problem is suspected
- G-N.2., G-UR.1.2., G-UR.3.2., G.UR.4.2.