Product Overview
MOEORW-WQM30is an embedded microprocessor-based intelligent calibrator developed for SF6 density relay performance verification, complying with DL/T 259-2012 standard. The device automatically converts measured pressure under arbitrary ambient temperature to the standard pressure at 20°C, eliminating manual temperature compensation calculation errors. It supports alternative gas media including N₂, Air, O₂ and CO₂ instead of pure SF₆ to avoid toxicity, high cost and environmental pollution of SF₆ decomposition products. Dual measurement channels enable simultaneous calibration of two density relays, compatible with most mainstream SF6 electrical equipment without relay disassembly via matched transition joints. The integrated touch display, built-in thermal printer and large-capacity storage realize full-automatic testing, data recording and on-site report output for power preventive test, factory inspection and daily maintenance of SF6 high-voltage apparatus.
Technical Parameters
|
Item |
Specification |
|
Operation Interface |
1024×600 color touch LCD screen |
|
Measurement Mode |
Single-channel / Dual-channel automatic measurement |
|
Single Test Duration |
1.0 ~ 2.0 min |
|
Pressure Measuring Range |
0.0 ~ 0.9 MPa, resolution: 0.001 MPa |
|
Calibration Pressure (20°C Standard) |
0.000 ~ 0.900 MPa |
|
Measurement Accuracy |
Class 0.25 |
|
Temperature Measurement Range |
-20°C ~ +120°C, resolution: 0.1°C |
|
Contact Test Voltage |
DC 24 V |
|
Temperature Acquisition |
Automatic sensor sampling / manual input |
|
Storage Capacity |
Over 1000 groups of test data |
|
Printing Module |
High-speed thermal micro printer (57×50 thermal paper) |
|
Power Supply |
AC 100~240 V 50/60 Hz / Built-in 16.8 V 6.6 Ah lithium battery |
|
Continuous Battery Runtime |
8 hours after full charge |
|
Air Pipe Fitting |
φ4 PTFE intake / measuring pipes, φ4 PU exhaust pipe with quick connectors |
|
Max Allowable Intake Pressure |
1.5 MPa |
|
Overall Dimension |
405 × 310 × 200 mm |
Main Functional Features
1.Hardware & Structural Design Equipped with dual independent gas measuring ports and dual signal acquisition terminals to support synchronous dual-relay calibration; integrated external temperature probe for real-time ambient temperature collection, matched universal transition joints fit most SF6 switches without component disassembly; USB interface supports firmware upgrade and offline data export to U disk; independent charging port with low-battery reminder function (alarm when power < 30%).
2.Core Performance Advantages Adopts high-precision pressure sensors and magnetofluid control technology to eliminate human operation errors; four pressure type calibration modes (relative, relative mixed, absolute, absolute mixed) to match all types of density relays; automatic identification of overpressure, dual-alarm, dual-lockout, mixed contact signals; automatic Pt-to-P20 pressure conversion algorithm built in to meet standard calibration requirements.
3.On-Site Application Value Compatible with substitute non-SF6 test gas to reduce operation cost and environmental hazard; automatic data storage with timestamp and equipment number labeling; one-click exhaust function to safely release residual pipeline pressure after testing; built-in clock calibration module to guarantee test report traceability; supports independent calibration of pressure gauges and density meters besides density relays.
Application Fields
1.Power grid operation & maintenance departments for regular preventive tests of GIS, SF6 circuit breakers and load switches
2.High-voltage electrical equipment manufacturers for factory inspection of SF6 density relays
3.Third-party electrical testing institutions for standardized calibration service
4.Industrial mining power stations with internal SF6 high-voltage equipment operation and maintenance
5.Metering verification institutes for periodic metrological verification of gas density controllers
Applicable Standards
1.DL/T 259-2012 Calibration Regulation for SF6 Gas Density Relays
2.DL/T 596-1996 Preventive Test Code for Power Equipment
FAQ
Q: What gas can be used for calibration instead of SF6?
A: N₂, air, O₂ and CO₂ are all available; fill the air storage cylinder to 1 ~ 1.5 MPa for continuous dozens of tests.
Q: How to extend lithium battery service life?
A: Charge timely when power lower than 30%; fully charge before long-term storage and recharge every 3 months.
Q: Why cannot pressure calibration be operated casually by users?
A: Pressure sensor calibration requires professional staff and standard pressure source; misoperation will permanently reduce measurement accuracy. Original calibration password: 5678.
Q: Is power disconnection required before wiring the relay signal cable?
A: Yes, live wiring is strictly prohibited to damage instrument internal signal acquisition circuit.
Q: What specification of thermal paper is required for replacement?
A: Standard 57 mm × 50 mm thermal receipt paper, install with thermal coating side facing down.
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