Provided By Charlie Nelson
I.
Compressed Gases and Electric Meter
Program
II.
Law & Regulation
III.
Regulation Code Application
IV.
Terminology and Technical information
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LPG
Vapor Meters
Cryogenics
Carbon Dioxide
Compressed Natural Gas (Mass flow Meters)
Utility Billing (Electric and water included)
Compressed Gas Cylinders
Hydrogen Gas (tentative)
Law vs Regulation
Law ( Business and Professions Code) –
Enacted by Legislation
Regulation (California Code of Regulation) –
Adopted by the Director…
Who is the “Director”?
Director – Secretary of Food & Agriculture
State Sealer – Director of Measurement
Standards
B&P Code Sections(most common):
12027 - Authority to enforce
12107 - Tolerances and Specifications
12500.5 - Type Approval
12510 - Use of incorrect device
12515 - Notification
12532 - Service Agency
B&P Code Sections:
Tagging of Device(s):
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B&P – 12500.10: Authorization to affix a
Unapproved device “Yellow” tag
B&P – 12506: Authorization to affix a Out of
Order “Red” tag
B&P – 12501.3: Authorization to allow use of
incorrect device “Blue” tag
Special Exemptions for Enforcement
Retroactive vs. Non-Retroactive Requirements
How does this apply?
Retroactive vs. Non-Retroactive
Retroactive Requirement are identified by print in
upright roman type
Non-Retroactive Requirements are identified by
print in italics
What does this mean?
Retroactive Requirement :
Are enforceable with respect to all equipment
Non-Retroactive Requirements:
Are enforceable after the effective date for:
(a) devices manufactured within a state after the effective
date;
(b) both new and used devices brought into a state after the
effective date; and
(c) devices used in noncommercial applications which are
placed into commercial use after the effective date.
General Code
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(Specific Code supersedes General Code)
Application
Specifications
Notes
Tolerances
User Requirements
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A.1. General. – This code applies to LPG and NH3
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A.2. Devices Used to Measure Other Liquid Products
not Covered in Specific Codes. Example Freon…
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A.3. Exceptions. – This code does not apply to mass
flow meters (see Section 3.37. Code for Mass Flow
Meters).
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A.4. Additional Code Requirements. – In addition to
the requirements of this code, LPG and Anhydrous
Ammonia Liquid-Measuring Devices shall meet the
requirements of Section 1.10. General Code.
Type Approval Requirements
Device Design – Size, Shape, and etc…
Supersedes General Code
If specific code does not address a specific
specification issue then you may refer to General
Code for requirements
The section addresses specifically to the
Inspectors performing tests.
Basic tolerance for all device are listed under the
“T” section of CCR:
Types of Tolerance:
1. Normal test
2. Special test
3. Acceptance tolerance
4. Maintenance tolerance
Equation for tolerance
M – S x 100 = +% Error
S
The section applies to Device users and how
they operate their weighing and measuring
devices.
Example: Scale out of level…
It is user or operator’s responsibility to maintain
level condition
Standard Conditions for various device program:
LPG – Correction to 60⁰F
Vapor Meters - Correction to 60⁰F
Cryogenics – Corrected to NBP @ 14.696 PSIA
Cryogenic Gases – Corrected to NTP
(70⁰F @ 14.696 PSIA)
Utility Billing (gases) - Corrected to 14.73 PSIA
Meter Identification and Marking Requirements
(a) Manufacturers’ name or trademark, type designation,
and serial number.
(b) Voltage rating.
(c) Test amperes (TA).
(d) Maximum amperes (CL) {meter class}.
(e) Watt-hour or disk constant (Kh) {expressed as watthours per revolution}.
(f) Register ratio (Rr) and multiplier (if 10 or larger).
(g) Frequency rating (Hz).
(h) Number of meter stator(s) or elements (polyphase).
(i) Ratio or rating of auxiliary devices.
Meter class must meet a minimum of Class 60 or
higher
Determine value of meter revolution and
minimum meter revolution for testing
Basic formula
Khs
X
Rs = Khm
X
Rm
Example: Standard Kh is 3.6 and Revolution of the standard is 8 (min)
3.6 x 8 = 28.8
The Kh of the meter is 2 , thus 28.8/2= 14.4 , this means the meter revolution
needs to rotate 14.4 times in the test (2 x 14.4 =28.8)
Example:
A heater output is 1500 watts and you have a 15
amp/120 volt plug outlet this means 120 volts
x 15 amps will supply 1800 watts therefore the
plug outlet is ok for that service, if you have
two heaters then 3000 watts / 120 = 25 amps
therefore you will need to connect to a 25 Amp
plug service to be adequate
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Gas (Boyle’s law)
(Charles law)
V/T=k
p = Pressure
V= Volume
T= Temperature
k = Constant
T=k*V or
V=k*T
or
Example: For Boyle’s Law 100 Cubic Feet of gas at 11 in. wc @ altitude pressure
of 13.17 psi (3000 ft)
needs to be corrected to base pressure of 14.73 psi
(Sea level) =
= 0.397psi + 13.17
14.73
= 0.92 x 100 cubic feet
= 92 Cubic feet
Charles Law - Temperature compensation to correct to
60⁰F
Vapor meter measures gas corrected to 60⁰F but temperature
is 80⁰F how much volume correction is need to bring
volume to equivalent to 60⁰F?
=V*(460+60⁰F)/(460+80⁰F) = V*(520/540) = 0.96
=V*0.96
Labeling
(1) Cylinders shall have the tare weight legibly stamped on the
cylinder.
(2) All tare weight values required in this article shall be preceded
with the letters “T.W.” or the words “Tare Weight.”
(3) The tare weight shall include the weight of the cylinder, the valve
and other permanent attachments. The weight of the protective
cap shall not be included in either the tare or the gross weight.
Tare tolerances
1/2 percent for tare weights of 20 lb, or less
1/4 percent for tare weights of more than 20 lb.
Labeling - continued
(b) Actual Tare Weight. When acetylene cylinders are filled but
are not acetone to the stenciled tare weight, the actual tare
weight must be shown on the tag with the net contents
statement.
(c) Net Contents. The net contents must be expressed in terms
of cubic feet, or pounds and ounces, or units of the metric
system.
(d) Identity. The identity of the product must be shown.
(e) Name and Address. The name, address and zip code for the
responsible company must be shown on cylinder.
(f) Liquefied Petroleum Gas Cylinder Contents. Cylinders or
bottles which are prefilled with liquefied petroleum gas
prior to sale, shall be labeled with the weight of the contents.