bench calibration of instruments using process line

a. prepare the instruments or the table needed in calibratoin
b.isolation of main block valve high and low side
c.close all the low side of 3 valve manifold.then close the high side
c.open the equalizing valve
d.open the vent screw and of both measuring chamber
e.purge with air both measuring chamber so that the air will trap then pully close the equalizing valve

f.install back the drain valve and install host fittings to high side in both measuring chamber.
g.andkeep the low side measurign chambers open to atmosphere
h.connect plastic  host while the other precision manometer to the hand pump.
then pressurize for leak test if hav leak repair then disconnect the one side by the transmitter then connect to fluke 87 and 250 ohms in a series connection
also connect handheld termial probe to the transmitter
then the fluke 97 must be in the MA setting before enregizing then do the calibration of 5 points
after calibration pull out the host fittings and put back the all series and also connect the wire to the transmitter
open the main isolation valve then open the high side
after open the equalizing valve then open the unit screw slowly so that the trap air will be drain to the atmosphere also do the other side close the equalizing valve
after that fully open the low side and the transmitter is online.