Product Overview
MOEORW-WQM20Q is a portable lightweight calibrator designed per JJG 1073-2011 and State Grid SF6 density meter calibration specifications, adopting 32-bit ARM main control chip and high-speed TI signal processing chip. The device realizes integrated functions of density relay contact test, indication error calibration and contact resistance measurement, supporting automatic Pt-P20 pressure compensation without constant temperature laboratory environment. The compact body weighs only 2.5 kg with independent host and accessory case layout for easy field transportation; it supports U disk batch export of test CSV data and built-in lossless data storage after power failure, targeting mobile field calibration work of power station primary equipment.
Technical Parameters
|
Item |
Specification |
|
Display Screen |
800×600 color resistive touch LCD |
|
Overall Power Consumption |
4 W |
|
Pressure Range & Resolution |
0 ~ 1.0 MPa, 0.0001 MPa |
|
Instrument Accuracy |
Class 0.2 |
|
Contact Resistance Test Range |
0 ~ 25 Ω, resolution: 1 mΩ, precision ±5% FS |
|
Temperature Test Range |
-50°C ~ 150°C, precision ±0.5°C, resolution 0.1°C |
|
Calibration Points for Gauges |
Max 6 preset pressure points for one-time calibration |
|
Print Output |
Chinese report format thermal micro printer |
|
Power Mode |
Built-in lithium battery / AC 220 V 50 Hz mains supply |
|
Host Dimension |
380 × 320 × 180 mm |
|
Accessory Box Dimension |
465 × 370 × 145 mm |
|
Net Weight |
2.5 kg |
|
Supported Contact Types |
Single/double alarm, single/double lockout, overpressure arbitrary combination |
Main Functional Features
1.Hardware & Structural Design Independent air intake, test and exhaust ports with dedicated temperature sensor interface; separate six-core signal test wire for contact resistance acquisition; USB port supports offline data backup and batch export; detachable thermal printer for convenient paper replacement; compact split host-accessory design reduces field carrying burden.
2.Core Performance Advantages Integrates 6 test modules: density relay contact test, indication error calibration, pressure gauge calibration, density meter calibration, contact impedance detection and contact type identification; supports 1/2/3 cycles of repeated testing with automatic average value calculation; real-time judgment of indication error, hysteresis error and contact switching difference; two temperature collection modes (built-in sensor automatic detection / manual temperature input).
3.On-Site Application Value Supports full-range / rated pressure only / hysteresis three modes of indication calibration; automatic prompt for incomplete parameter setting and insufficient intake pressure; one-key pipeline exhaust ensures safe disassembly of air pipes after testing; historical data supports single delete or full formatting, each test record stores complete pressure, temperature and contact resistance data for audit traceability.
Application Fields
1.State Grid & Southern Grid mobile inspection teams for outdoor substation on-site calibration
2.Regional metrology institutes for portable field verification service
3.Small and medium switchgear manufacturers for semi-finished product batch testing
4.Wind power, photovoltaic booster station power equipment maintenance teams
5.Municipal power supply company routine preventive test projects
Applicable Standards
1.DL/T 259-2012 Calibration Regulation for SF6 Gas Density Relays
2.DL/T 596-2021 Preventive Test Code for Power Equipment
3.JJG 1073-2011 Verification Regulation of Pressure-Type SF6 Gas Density Controllers
4.GB/T 22065-2008 Pressure-Type SF6 Gas Density Controllers
5.State Grid Substation Inspection General Management Regulation Volume 39: SF6 Density Meter Calibration Detailed Rules
FAQ
Q: How to export all stored test records?
A: Insert blank U disk into USB port, select "U Disk Storage" function, the system auto-generates mddata.csv file for data backup.
Q: What is the correct sequence to disconnect air pipes after testing?
A: Close gas cylinder valve → click exhaust button to empty residual pressure → remove air pipes to avoid high-pressure gas ejection.
Q: What will happen if test gas pipeline vibrates during calibration?
A: Vibration leads to unstable pressure collection and invalid contact action pressure test data; fix pipeline firmly before startup.
Q: Can contact resistance test be performed independently without pressure supply?
A: Yes, select "Contact Impedance" module separately, only signal test wire connection is required.
Q: How to judge if contact type identification test completes?
A: The device emits a beep when contact state changes during inflation/deflation, all detected contact types will be marked on screen after full pressure cycle.
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