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Working Principle
Mechanical dead-weight testers or primary standards are the most accurate reference instruments for pressure. Their functional principle is based on the physical principle of pressure = force/area. Mass pieces placed on the top of a piston-cylinder system are the source of a precisely defined force. By producing a certain (counter) pressure inside the pressure balance an equilibrium is achieved: the mass pieces, including the free-running piston of the piston-cylinder system, are floating, which will lead to a very accurate pressure at the test port.

Model
(optional) CW-6T CW-60T CW-250T CW-600T CW-1000T CW-1600T
range (MPa) 0.04-0.6 0.1-6 0.5-25 1-60 2-100 2-160

â?? Applications: digital pressure gauge, precision pressure gauge and pressure transmitter testing, adjusting and calibrating.
Accuracy: 0.005%F.S.; 0.01%F.S.; 0.02%F.S.; 0.05% F.S.
â?? Materials:
Piston (the rod and cylinder): tungsten carbide
Weight: Non-magnetic stainless steel (level 0.005, 0.01, 0.02);
Carbon steel (level 0.05)
Base: stainless steel
Working medium:
25MPa: the mixed oil (transformer oil and kerosene oil)
25MPa: sebacate oil
Performance features:
Accord with JJG59-2007;
Able to test two gauges synchronously; Applied the fast pressure plug; no oil leakage;
Abrasive resistance is improved because of the high-tensile and high-hardness wolfram carbide material;
The piston rod is anti breakage structure.

1.The piston system configures Eddy current displacement sensor,adopts integrated double row LCD digital cursor display ( which is firstly invented in China), therefore piston position can be observed anytime, which is sensitive, intuitional,accurate.

2.With pre-pressure pump, it can fill oil to large capacity gauge, several gauges or long distance calibration pipeline system.

3.The tester junction with stop valve and piston stop valve, so it can be used as independent pressure source, when piston stop valve is closed.

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Key Specifications/Special Features:

SMD common-mode choke coil
Low profile and small size SMD
Suitable for reflow soldering
Operating temperature: -10 to +60 degree Celsius
Applications: desktops, laptops, DSC, and computer peripheral
RID common-mode choke coils
Small-profile choke coils
Ferrite core toroid choke coils
Large-current choke coils
Low resistance choke coils
MPP/hi-flux/sendust/RF carbonyl/iron power core choke coils
For excellent EMI suppressor
High frequency, low loss
Common-mode filter
Toroidal common-mode inductor
Inductance L1, L2 range: 100uH to 5,000uH
Materials:
Core: ferrite core
Wire: 2-UEW
Base: phenolic base
Terminal: tinned-copper wire
Adhesive: epoxy resin
Temperature rise: 45 degree Celsius maximum at rated current
Storage temperature: -25 to +85 degree Celsius
Operating temperature: -20 to +80 degree Celsius
Resistance to solder heat: 260 degree Celsius, 10 seconds

Key Specifications/Special Features:

Rated current: 0.3 to 10A
Low resistance
0.7 to 100mH dual choke
100kHz to 3MHz common mode resonance
Low temperature rise
Applied in DC/DC, AC/DC line noise suppression, telecommunication system, LCD/PDP televisions, and computer periph

Types:
EC type high frequency switch transformer
EE, EI type high frequency switch transformer
PQ type high frequency switch transformer
EFD type high frequency switch transformer
EP type magnet-shielding switch transformer
RM type communication filter, aux power transformer
ET and FT type linearity filter
T (ring) type filter and switch transformer
G (jar-shaped) switch transformer
DR (I) type transformer
T (ring) iron power core, DC filter inductor
Applications: switching power supplies, chargers, TV and CRT monitor display, UPS, VCD/DVD players, audio and visual equipment, OA machines, and inverter

As a upgrade var compensator for substations, the svqr has remarkable advanteges in many aspects such as var compensation precision, , response speed, stabilization of system voltage, reduction of line losses, and enhancement of transmission capacity.
Senbao developed, for the first time in china, the substation var compensator, svqr, whose output is changed by regulating voltage across the capacitor. The svqr has found wide applications in substations. With complete hv and lv testing beds and the-state-of-the-art dsp-based control system development system, senbao has gathered a large army of excellent professionls and has passed the national iso 9001 quality system certification.
The svqr is widely applied not only for new substations, but also for upgrading of existing substations, transforming the existing manual 1-step tbb into an automatic 9-step voltage-regulating-type var compensator. Senbao svqr has been operating successfully at an altude of 4, 000 meters in the cold area of shangri-la, yunnan, way ahead of the domestic manufacturers of the like products.