GB/T 21699-2008Verification/Calibration method of rotating-element current meters in straight open tank (English PDF)
直线明槽中的转子式流速仪检定/校准方法
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for GB/T 21699-2008 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
April 9, 2008
Implementation date
July 1, 2008
Scope
GB/T 21699-2008 is the English-translated version of 直线明槽中的转子式流速仪检定/校准方法.
GB/T 21699-2008 is the Chinese standard "Verification/Calibration method of rotating-element current meters in straight open tank".
Its scope clause reads: This standard specifies the principles, equipment, procedures, methods, certificates, information and flow meter calibration groove (hereinafter rotor flow meter verification/calibration Referred to as "test slot") acceptance and so on.
This standard applies to the rotor flow meter verification/calibration, including in open channel with the propeller speed, spinning cup flow meter and laboratory With micro-rotor type flow meter.
NOTE. This standard does not consider the velocity meter in linear static tank mobile test/calibration with the difference in the turbulent water flow rate measuring point is present, as well as temperature and Errors on sediment concentration and other media generated. Its clauses include terms and definitions.
Found what you need?
Document preview — GB/T 21699-2008
National Standard of the People's Republic of China
- ICS
- 07.060
- Classification
- N 93
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
1 Scope
This standard specifies the principles, equipment, procedures, methods, certificates, information and flow meter calibration groove (hereinafter rotor flow meter verification/calibration
Referred to as "test slot") acceptance and so on.
This standard applies to the rotor flow meter verification/calibration, including in open channel with the propeller speed, spinning cup flow meter and laboratory
With micro-rotor type flow meter.
NOTE. This standard does not consider the velocity meter in linear static tank mobile test/calibration with the difference in the turbulent water flow rate measuring point is present, as well as temperature and
Errors on sediment concentration and other media generated.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 11826-2002 rotor flow meter
GB/T 19677-2005 Terms and symbols for hydrological Instruments
GB/T 50095-1998 standard hydrological basic terminology and symbols
3 Terms and Definitions
GB/T 19677-2005 and GB/T 50095-1998 and established the following terms and definitions apply to this standard.
3.1
Continuous and stable rotation of the rotor began to minimum flow rate, symbol vp 0.
3.2
Flow meter calibration graph, the transition to a low-flow rate curve at the turning point of the straight portion, symbols vp k.
3.3
Each revolution of the rotor, water particles move from symbol to Chou.
3.4
Additional instrument and rotor structure coefficient and skin friction related symbols Rao.
3.5
A groove between assay, or other instrument than the measured flow rate of the calibrated stable performance, high accuracy flow meter dedicated.
3.6
Slot by the flow meter and the forward motion of the suspension device along the peaks produced, can wet section height increases, reducing the relative velocity,
GB/T 22482-2026 | GB/T 11828.4-2025 | GB/T 11828.2-2022 | […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
How to Download GB/T 21699-2008
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 10003-2026 — Biaxially oriented polypropylene (BOPP) film
GB/T 10004-2026 — Plastic/Plastic laminated films and pouches for packaging
GB/T 10007-2026 — Rigid cellular plastics - Determination of shear properties
Secure payment via Stripe
Payments accepted
GB/T 21699-2008
$225.00