Some standard content:
National Metrology Verification Regulations of the People's Republic of China JJG946—1999
Pressure Tide Gauge
1999-10-18 Issued
2000-03-15 Implementation
State Administration of Quality and Technical Supervision Issued
J.1F946—1999
Verification Regulations of Pressure Tide Gauge
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JJG 946—1999
This regulation was approved by the National Quality and Technical Supervision Commission on October 18, 1999, and came into effect on March 15, 2000
Responsible unit: National Technical Committee for Geometric Length Metrology Drafting unit: National Oceanographic Measurement Station
This regulation is drafted by the National Technical Committee for Geometric Length Metrology Main drafter of this regulation:
Li Mingzhao
946-1999
[National Oceanographic Measurement Station]
(National Marine Reclamation Station)
Technical requirements
Handsome appearance-
Main technical indicators of the instrument
Calibration conditions
Calibration equipment
Calibration environment conditions
Calibration items
Instrument appearance
High (water level) indication error,
High (water level) discrimination width
Timing indication error·
Calibration method
Instrument appearance.
Altitude (water level) value error
Temperature reduction indication error·
Traceability identification
Timing indication error·.
Test results·
Processing of calibration results and calibration cycle
Processing of calibration results·
Determination of the same period
JJG 946—1999
Pressure Tide Gauge (Water Level Gauge) Calibration Record Format (Shore Station Type) Appendix A
Pressure Tide Gauge (Water Level Gauge) Calibration Record Format (White Container Type) Appendix B
Appendix (
Calibration Certificate Front Format
Appendix D Calibration Certificate Section and Side Format
Appendix E Calibration Result Notice Front Format
Appendix F
Calibration Result Notice Back Format
JJG: 9461999
Pressure Tide Gauge Calibration Procedure
This regulation is used to calibrate the pressure tide gauge after repair. It can also be used for the calibration of the pressure level gauge.
1 Overview
It is a pressure gauge for measuring tides in oceans, rivers and bays. The original product is a pressure sensor that senses the change of the pressure level. The value is extracted from the whole end: The instrument is composed of three pressure transmitters, including suction and pressure transmitters, pressure transmitters, and transmission systems. The positive sensor is divided into two types: pressure transmitter, pressure transmitter, etc. 2. Appearance of the instrument 2. [1. The paint layer of the surface of the new factory equipment is evenly plated or polished, the scale is clear, and there shall be no scratches, joints, punctures, rust and gas pools. 2 , [2 The instrument specifications should be able to adjust the market, all parts of the connection length can be tight, 2,1.3 The instrument is marked with the name, model, manufacturer name, mark and production date. No.: 2.2
The instrument's main technical indicators
The technical indicators of the screen card are listed in the table
Shore station type
Portable type
High-altitude ticket measuring
3 Verification requirements
Control equipment||t t||3.1.1 Water towerwwW.bzxz.Net
Water inspection measurement
0·-58
0--600
Inner diameter: medium
Discrimination closed
Water level change range: (08.5)n:
Production indication
Time indication
Within 24h=33
Temperature measurement
Blue Electric East Road
JJL 946--1999
Water tax change rate: (00.4)/m1.
3.12 Tide height accuracy: 0.(M)2 I1:
3.1.3 Standard timer
Uncertainty within 24h: 1
3.1.4 Standard active cold pressure gauge
Pressure measurement range: (0.t-6) MPt:
Accuracy: 0.02%
3.1.5 Standard barometer
Pressure measurement range: (810～1100)hPa; Accuracy: 0.3hPac
3.1.6 Constant temperature water
Constant temperature water tank: Inner diameter.3I: Depth H0.6n Water temperature variation range: (-2～3>℃
Maximum temperature difference in constant temperature water area: 0.02C.
3.1.7 Platinum resistance meter
Temperature measurement range: (2～35)～;
Accuracy: 0.02C.
3.2 Calibration environmental conditions
3.2.1 Standard case pressure gauge ambient temperature: (20+2)%, relative temperature: 7%. 3.2.2 Tide gauge ambient temperature: (5~35)°C relative humidity 85%. 4 Verification items
4.1 Appearance of instrument
4.2 Full height (water level) indication error
4.3 Tide height (water level) error
4.4 Time indication error
Verification method
5.1 Appearance of instrument
Visually inspect the appearance of the instrument. The appearance of the new instrument shall comply with the provisions of 1.!~!.3 of this specification. 5.2 Tide height (water level) indication value transmission base
5.2.1 Tide height (water level) indication error verification points are: Um, 1m.2n, 3m4m, 5m, 6m, 7m, 8m (±10 nm].,
For instruments with a range of less than 120m, a calibration point is set every 10m from 0 o'clock. For instruments with a range of 260m, a calibration point is set every 30m from 0 o'clock. For instruments with a range of 1 tidal height (water level), a calibration point is set every m from 0 o'clock. 5,2.2 Procedures and methods
JJG946—1999
5.2.2.1 For a tidal gauge with a measuring range of (0～8), the tidal height (water level) indication error calibration is carried out in the tidal gauge (water level gauge) calibration equipment. After the installation and commissioning of the instrument to be tested is completed, the water level in the water tower is adjusted to 01, so that the indication of the instrument to be tested is consistent with the standard installation minimum value. 5 .2.2.2 Turn on the backflow valve and the water inlet pump, and raise the water level at the rate listed in Table 2. When the water level rises to 1M, close the water inlet pump and the water inlet valve. After stabilization for 2 minutes, first read the water level displayed by the standard device, then read the water level displayed by the instrument under test (read in millimeters) and record it, continue to raise the water level, and determine the next fixed point in the same way, and complete the inspection of the water level point.
5.2.2.3 After completing the inspection of point 8, raise the water level to 8.1m, then turn on the drainage valve and the drainage pump, and lower the water level at the rate listed in Table 2. When it drops to 8m, close the non-water valve and the drainage valve, and determine ? minutes later, first read the water level displayed by the standard device, and then read the water level value displayed by the instrument under test (read to meters) And record, continue to lower the water level, and calibrate the next water level calibration point in the same way until the calibration of the 0 water point is completed. 2
Instrument type
Water level rate (min)
Tidal gauge
Water transmitter
5.2.2.4 For instruments with a tidal height (water level) measurement range exceeding 8m, the tidal height (water level) indication error shall be completed by calibrating the standard active cold pressure gauge. The specific method is to connect the instrument to be tested with the standard piston pressure gauge catheter and place them in a constant water tank for 5, 15, and 25 ℃ respectively. Before pressurizing, first read the standard air pressure indication value and the small reading of the pressure gauge indication (read to the minimum required value) and record them. 5.2.2.5 Pressurize gradually to make When the piston pressure gauge reaches the required value of the second calibration point (0.1MI equivalent to a depth of 10m), after stabilizing for 2 minutes, read the indications of the standard gas pressure gauge and the standard pressure gauge, and then read the indication of the instrument being tested (read to the minimum scale value). Use the same method to calibrate the next calibration point, complete the calibration of the last calibration point, and then calibrate in the opposite direction one by one. After stabilizing for 2m at each calibration point, read the standard gas pressure gauge and the standard pressure gauge respectively, and then read the indication of the instrument being tested (read to the minimum scale value) and record until it reaches 0.
5.3 Temperature indication error
5.3.1 Temperature calibration points are: 2, 5, 10, 15, 25, 355.3.2: The temperature indication verification and the height (water level) indication verification are carried out simultaneously, that is, the temperature of the warm water is controlled at 2: 3mn, first read the minimum value of the standard temperature meter: read the temperature indication of the tested temperature (read without two decimal places) and record it,
5.3.3 Other verification points are verified according to the method of the sample. 5.4 Tide height monitoring hall width
5.4.1 The verification of the tide gauge (water level gauge) with a measurement range of (0-8) and the monitoring valve is carried out simultaneously with 5.2.2.3, and the verification points are 7m, 4m, 1m (10m). 5.4.2 According to the technical indicators of the instrument under test, the standard values and the inspection standards stipulated in paragraph 3
.1;:946—1999
, after the indication of the instrument under test stabilizes, the water level in the tower will be lowered. When the water level drops to the value shown in Table 1, the indication of the instrument under test should decrease.
5.2.3 Measurement of sample map (water level): The calibration can be carried out together with 5.2.2.4. The calibration points are the pressure point of the impact, early and high pressure points: The method is to use the special small research code for soil engineering (equivalent to the standard of the whole force reading technology, the value of the instrument can be verified by the case study, 5.5 Timing indication compensation difference
The error caused by the timing to be tested and the standard timing shall not exceed ±3% within 24h: 5.6 Test conclusion
5.6.1 Tide height (water level) indication The error (1) is calculated by the formula: ah--h
The error of the primary tidal height (water level) of the instrument under test is: Ah,
The indication value of the primary tidal height (water level) of the instrument under test is: ArR
t The indication value of the primary and secondary tidal height (water level) of the standard instrument is: m. The maximum value should meet the relevant requirements of Table 1. 5.6.3 The indication value of the timer is calculated by the formula (2) Anatuts
Where: -- The indication error of the instrument under test is: ! The indication value of the instrument under test is:
... The indication value of the standard timer is:
2: The calculation result should meet the relevant requirements of Table 1. 5.6.3 The measured value shall be calculated according to the formula (3): AT - TH - T
Wherein: T is the error of the first temperature indication of the instrument under test, T is the first temperature indication of the instrument under test, C; Tn is the first temperature indication of the standard temperature table, t. The maximum value of the instrument shall meet the relevant requirements of Table 1. 6. Processing of verification results and verification cycle
6.1 Handling of verification results
The instrument that meets the requirements of this regulation after verification is deemed qualified and a verification certificate shall be issued; the instrument that does not meet the requirements of this regulation is deemed unqualified and a verification result certificate shall be issued. 6.2 Verification cycle
The verification period of pressure tide gauge (water level gauge) is 2 years. 4
Appendix A
JJG9461999
Verification record format of pressure tide gauge (water level gauge) (station type): Dynamic error correction
Water level instrument verification Setting (m)
Standard installation
Set indication
Discussed
Time data indication error inspection width (
Verification:
Embedded time
Instrument indication
Water drop verification (m)
Standard sliding installation
Set indication
Appearance inspection
Verification:
Instrument under test
Discrimination valve verification (m)
Abbreviated unit
JIG94f—1999
Foreign control setting
Time group inspection
7.\P SST0=1
（191）Issue number
+ENFEO
Cloud value identification certificate
Inspected instrument only.
Your position
Appendix C
Inspection unit
Instrument name
Model specification
Factory number
Manufacturer
Inspection conclusion
Determination month
Valid until
JJG946- —1999
Front format of calibration certificate
(Name of calibration unit)
Appendix D
Instrument identification valve
JJG946—1999
Back format of calibration certificate
Calibration results
Average indication error of tidal height
Maximum indication error of tidal height
Device indication error
Temperature indication error
Note: Please bring this certificate with you for next calibrationAppendix C
Inspection unit
Instrument name
Model specification
Factory number
Manufacturer
Inspection conclusion
Judgment month
Valid until
JJG946-—1999
Front format of inspection certificate
（ (Name of verification unit)
Appendix D
Instrument identification valve
JJG946—1999
Format on the back of the verification certificate
Verification results
Average indication error of tidal height
Maximum indication error of tidal height
Device indication error
Temperature indication error
Note: Please bring this certificate with you next time you make a verification.Appendix C
Inspection unit
Instrument name
Model specification
Factory number
Manufacturer
Inspection conclusion
Judgment month
Valid until
JJG946-—1999
Front format of inspection certificate
（ (Name of verification unit)
Appendix D
Instrument identification valve
JJG946—1999
Format on the back of the verification certificate
Verification results
Average indication error of tidal height
Maximum indication error of tidal height
Device indication error
Temperature indication error
Note: Please bring this certificate with you next time you make a verification.
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