The parameters of the vortex street flowmeter said including instrument from the aspects of the performance of the instrument range, accuracy, linearity, and signal output, and the corresponding time, repeatability, pressure loss and flow range, etc., and then from the aspects of the characteristics of the dielectric fluid medium including: temperature and pressure, corrosion resistance, density, viscosity, scale, miscible, conductivity, specific heat values, such as the installation conditions include: flow direction signs, direction of piping, pipe size, power supply, grounding, detection a length of straight pipe upstream and downstream, concerns, maintenance space, etc., roughly include these parameters of vortex street flowmeter,
Speaking of vortex flow meter parameter setting, because each manufacturer produces vortex flowmeter set parameters of the software system is not uniform, so there is also a different way in the operation of the set parameters, the vortex street flowmeter selection requires the user to provide parameter data used instrument, the factory will adjust the parameter to calculate of the instrument setup, set after calibration in production to the user, and set up a password, recommend that users generally do not need to set parameters, such as the need to reset to professional operation,
Shanghai has permanently vortex flowmeter (UHLUGB) parameter Settings are as follows:
And loosen the hold A B button at the same time,
Project according to instructions
1 item 00000 pass, press A key to display A password under 00000
Two liquids, gases, saturation, overheating press the C key, cycle show
Press A button, select A medium under
3 m3/t, t/h, kg/t, Km3/h, Nm3/h, NKm3/h press the C key, cycle show
Press A button, A unit choose
Four 0.000 quO combination with B C key inputs, press A key under A meter coefficient (sign)
The five 0.0 HZ small signal to remove
Six pressure 0.000 mpa setting pressure (gauge pressure)
Seven temperature set point temperature of 0.0 degrees Celsius
Eight password 0.000 Kg/m3 value density
9 0.000 NKm3/h, FULL set of 20 ma corresponding FULL flow
10 NKm3 0.0/t press B C can be reset at the same time accumulated flow
About special units: in item 3 above, there is a blank (without display), used for special units, such as velocity of m/s, litres/minute, pounds per hour, etc., the basic formula for Q=f (3.6/k) *, please translate the conversion factor to the meter coefficient k,
Shanghai has permanently (UHLUGB) vortex flowmeter calibration parameter Settings are
The menu name T100
Calibration parameters: PT100 100 ohms PT1000 of strain resistance box set 1000 ohms, adopts high precision AD conversion chip AD7705, without calibration can also ensure 3 to 4 degrees Celsius to error, after the calibration error is less than or equal to 0.5 degrees Celsius,
The menu name T160
Variable resistance box to 160 ohms calibration PT1000 of strain resistance box set corresponds to 1600 ohms,
The menu name 210
Variable resistance box to 210 ohms calibration PT1000 of strain resistance box set corresponds to 2100 ohms,
P min: pressure zero calibration value,
Max: P stress full calibration value,
P ran: pressure range
P + : 0: stress patterns, positive pressure and negative pressure, negative pressure Settings for setting pressure,
4 ma: 4.000:4 ma calibration, the calibration menu that must to set parameters for 4, 16 AD421 DA conversion chip with high precision, multimeter high precision than normal, the customer has no special requirements for generally do not need to be calibrated,
20 ma, 20 ma: 20.000: calibration this menu that calibration must to set parameters for 20, ditto,
Reset: restore factory Settings, prohibit setting,
PT100/PT1000: the choice of temperature sensor,
Tco: temperature linear correction, the default value is 50, assumes that the main interface to 100 degrees Celsius, 101 degrees Celsius, set to 51 here, if the standard is 99 degrees Celsius, here set to 49,
Loca I P: local atmospheric pressure Settings,
PB/PJ: PB for the table pressure sensors, PJ for absolute pressure sensors,
T0/T20: T0 for standard conditions of 0 degrees Celsius a atmospheric pressure, volume of a gas T20 to 20 degrees Celsius, for the calculation of standard of gas volume flow, gas is 20 degrees Celsius standards commonly, the other is 0 degrees Celsius,
Note: the above menu non-work personnel adjustments is not allowed while visiting, secretly adjustments may lead to temperature and pressure,
Finally also said a little instrument coefficient of vortex flowmeter is one core parameter, generally only the shape of the body with the size of the instrument and the vortex are linked, although use for a period of time there will be a small changes, but unless through quality supervision departments check generally are not allowed to modify,