HOME Cart(12) Quotation About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

JJG 738-2024 English PDF

US$359.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 738-2024: Verification Devices for Taximeters
Status: Valid

JJG 738: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 738-2024	English	359	Add to Cart	4 days [Need to translate]	Verification Devices for Taximeters	Valid	JJG 738-2024
JJG 738-2005	English	599	Add to Cart	3 days [Need to translate]	Verification Regulation of Standard Equipment for Taximeter	Obsolete	JJG 738-2005
JJG 738-1991	English	599	Add to Cart	4 days [Need to translate]	Verification Regulation of Taxi Meter Standard Equipment	Obsolete	JJG 738-1991

Basic data

Standard ID	JJG 738-2024 (JJG738-2024)
Description (Translated English)	Verification Devices for Taximeters
Sector / Industry	Metrology & Measurement Industry Standard
Word Count Estimation	17,137
Date of Issue	2024-02-07
Date of Implementation	2024-08-07
Issuing agency(ies)	State Administration for Market Regulation

JJG 738-2024: Verification Devices for Taximeters

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Metrology Verification Regulations of the People's Republic of China Taxi meter calibration device Released on 2024-02-07 2024-08-07 Implementation The State Administration for Market Regulation issued Taxi meter certification Device Verification Procedure Replace JJG 738-2005 Responsible unit. National Vibration Shock Speed Measurement Technical Committee Main drafting unit. Beijing Institute of Metrology and Testing Science China National Institute of Metrology Jiangxi Institute of Metrology and Testing Participating in the drafting. Jiangsu Fengyi Tongchuang Internet Technology Co., Ltd. Shanxi Institute of Standards and Metrology This regulation is entrusted to the National Technical Committee for Vibration, Shock and Speed Measurement for interpretation The main drafters of this regulation are. Yu Baoliang (Beijing Institute of Metrology and Testing Science) Sun Qiao (China National Institute of Metrology) Yang Qiqi (Jiangxi Institute of Metrology and Testing) Participating drafters. Yin Yong (Jiangsu Fengyi Tongchuang Internet Technology Co., Ltd.) Liu Jiajing (Beijing Institute of Metrology and Testing Science) Lv Qingbin (Beijing Institute of Metrology and Testing Science) Bai Min (Shanxi Institute of Standards and Metrology)

Introduction (II) 1 Scope(1) 2 References(1) 3 Terminology (1) 4 Overview(1) 4.1 Machine calibration device (1) 4.2 Roller calibration device (2) 5 Metrological performance requirements (2) 5.1 Machine calibration device (2) 5.2 Roller calibration device (2) 6 General technical requirements (3) 6.1 Machine calibration device (3) 6.2 Roller calibration device (3) 7 Measuring instrument control (4) 7.1 Verification conditions (4) 7.2 Verification Items (5) 7.3 Verification methods (5) 7.4 Processing of verification results (9) 7.5 Verification cycle (9) Appendix A. Information on the calibration certificate and calibration result notice of this machine calibration device (10) Appendix B Roller Calibration Device Calibration Certificate and Calibration Result Notice Information (11)

Introduction

JJF1001-2011 "General metrological terms and definitions", JJF1002-2010 "National metrological verification procedures The JJF1059.1-2012 “Evaluation and Expression of Uncertainty in Measurement” together constitute the basis for the formulation of this regulation. This regulation is based on the current status of taximeter calibration devices in my country and is a revision of JJG 738-2005. Revised. Compared with JJG 738-2005, this regulation has the following major technical changes in addition to editorial changes. --- Deleted the terms "vehicle characteristic coefficient" and "taxi meter usage error"; added " "Rental car meter" "Roller odometry" two terms; adjusted "meter constant k" "machine" Two terms to make it consistent with JJG 517-2016 Taxi Meter; --- The composition and structural diagram of the machine calibration device and roller calibration device were added to "Overview"; --- Modified the metrological performance requirements of "rotation error" and "speed error" of the machine calibration device; --- Deleted the two items of "pulse count" and "pulse frequency" of the machine calibration device that are not related to the meter machine calibration Metrological performance requirements; --- Modified the metrological performance requirements of the roller calibration device "main roller rotation error" and "main roller speed error"; --- Modified and added some contents of general technical requirements; --- Modified the verification equipment and related technical requirements; --- Modified the verification items; --- Clearly define the test points for various errors and repeatability; --- Modified the verification methods of "revolution error" and "revolution repeatability" of the machine verification device; --- Modified the verification method of the roller verification device "main roller diameter error"; ---Added data processing methods for various error verifications; ---Change the verification period from "generally no more than 3 years" to "generally no more than 2 years". The previous releases of this regulation are. ---JJG 738-2005; ---JJG 738-1991. Taximeter calibration device verification procedures

1 Scope

This regulation applies to the taximeter local calibration device (hereinafter referred to as the local calibration device) and the Initial verification, subsequent verification and Check during use.

2 References

This specification refers to the following documents. JJG 517 Taxi Meter JJF1604 Taximeter Type Evaluation Outline For any referenced document with a date, only the version with the date is applicable to this Regulation; for any referenced document without a date, The latest version (including all amendments) shall apply to this regulation.

3 Terminology

3.1 Taximeter It is used to measure the mileage of taxis during operation and the time at low speed. A measuring instrument that calculates and displays the fees payable by passengers for car rental based on mileage and time. 3.2 Taximeter constant k The taximeter receives the number of pulses required to correctly display each kilometer traveled by the taxi. The meter before loading. 3.4 Rolerranging method In the roller meter calibration device, the roller drives the taxi drive wheel to rotate through friction transmission. The method also measures the actual mileage of the taxi and verifies the meter error after loading.

4 Overview

4.1 Machine verification device The machine verification device is mainly composed of input keyboard, control unit, display unit, drive motor, etc. The intention is shown in Figure 1. Figure 1 Schematic diagram of the calibration device structure

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 738-2024_English be delivered?

Answer: Upon your order, we will start to translate JJG 738-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 738-2024_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 738-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 738-2024?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 738-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.