At present, oil companies are basically regular calibrate tank in gas station with manual, and then form the current tank volume table, but the accuracy of manual measurement can no longer satisfy the increasing demands of refinement. This calibration system is designed and produced in full accordance with national measurement regulations, and have passed the strictly examine and approve. The underground tank and truck tank could totally satisfy the measurement standards after re-calibration by Sanki calibrate system!
l System configuration:
u Hardware configuration:
t High precision volume measurement machine
t Special Magnetostrictive probe
t PC
t Printer
t RS232 to RS485 module
t 2’’ anti-low temperature hose
u Software configuration:
t Special software for volume calibration
t Special software for road tanker volume calibration
1 Hardware parts
Mainboard high accuracy flow meter vane pump
l Volume measurement machine
u Features of Electronic parts:
t Improved electro circuit workmanship greatly enhanced the reliability
t Wide voltage design meet various situation maximum to AC380V ± 20%
t Self diagnosis improves the efficiency of service.
t Multiple self protections are available to enhance the performance during
power phase lack,over-voltage or motor overheat occurr.
u Features of mechanical part
t High accuracy flow meter
LB-type scraper flow meter is the latest heavy flow meter in the world. It has
minimum leakage, high precision and more smoothly operation.
v Main features:
w Wide range flow rate, high pressure, strong adaptability.
w High accuracy, well repeatability, and minimum impact by medium viscosity
change.
w Smooth rotation, no vibration and noise.
v Main technical parameters
w Flow rate range: 50-500L/min
w nominal pressure：1.6MPa
w Measure Precision：≤±0.2%,
w repetitive error≤0.07％ ；
w Measurement range ratio ﹥1：10
w Environment temperature：－40℃～＋55℃
t Vane pump
YB series self-suction vane pump adopt rotor which with vane to drive liquid.
Self-lubricating vane pump is made from nodular cast iron, with built-in bypass
valve.
v Main features:
w Inlet suction is higher than 5m with fast speed and high flow rate, no need
initial oil for suction, suitable for underground and aboveground tank.
w The framework of vane makes more stable operation and lower noise.
w Built-in bypass valve can adjust flow rate to avoid over pressure.
w T type filter could effectively protect pump.
v Main technical parameter
w Nominal pressure：1.2MPa
w Inlet vacuum：≥54KPa
w Flow rate：350L/min
w Temperature：－40℃～＋55℃
w Noise：≤75dB
Three stage filters effectively protect the precision and prolong the lifetime of volume
machine.
u Ex-proof design of volume machine
v Ex proof parts such as junction box and pulser.
v In hazardous Zone 1, all the parts are ex proof
protected.
v Isolation place between electronic parts and Zone 1
prevent oil and gas into the computer box;
v Ventilation window at the side of dispenser avoid oil gas
concentration at the bottom of dispenser.
l Special Magnetostrictive probe
v High precision
Probe is with 0.1mm error and 0.01mm differentiate
ratio, which can ensure the high accuracy of volume
chart produced.
v Synchronization between oil volume and level changed
oil level is changing rapidly, the response speed of
current probe is few seconds generally, without
consistency of time length. So this take uncertainty
factors between the oil volume changed and real-time
level variation. Sanki special Magnetostrictive probe
collect data twenty times each second at maximum,
to strongly ensure the precision of calibration.
v Prevention of level fluctuation
To ensure the minimum affect by level fluctuation during oil
changed, we add a cylindrical stainless steel jacket based
on original product. Data collected must be checked and
confirmed several times to make sure the consistency
of real-time display and actual level.