Fine-tuning of pressure sensors by moment power manner

Pressure sensors are widely used in petroleum, chemical industry, metallurgy, electric power, food, paper making, medicine, machinery manufacturing and other industries. Reliable operation, stable performance, easy to install and use, small volume, light weight and high cost performance, can be widely used in all kinds of positive and negative pressure measurement. Pressure sensor fine-tune the specific operation steps 1, modulus fine-tuning, Sensor fine-tuning) Main job is completely fine-tuning and zero fine-tuning, precision fine-tuning to fully meet three times in the precision of the transducer, mobile operator menu: equipment set - — > Diagnosis and maintenance - — > Test - — Limit the fine-tuning and operate. Such as the precision of the sensor is zero. Fine-tuning 25, then the lower limit value in 0. 06, we just need to follow the hand in the process of the overall operation of instruction can be supplied by the operator, then the ceiling in the same position sensor fine-tuning adjustments, note that the ceiling fine-tune do not exceed the maximum measuring range of the transmitter. 2, zero fine-tuning will first transmitter through the atmosphere, and use the hand control and measure the loop connection, and then set the device - — > Diagnosis and maintenance - — > Test - — > Sensor fine-tuning - — > Zero fine-tuning, finally press hand hint of zero fine-tuning. It is important to note transmitter must be within 3% based on the zero to zero. When fine-tuning, we will protect set OFF in the transmitter, the transmitter switch protection Settings is generally in front of the header is red, state have ON and OFF, such as protection function open, fine-tuning will not succeed. 3, d/a fine tune ( Output fine-tuning) The mobile operator menu device Settings - — > Diagnosis and maintenance - — > Test - — > Output fine-tuning - — > The trimmer/a. Will & quot; Control circuit & quot; Set to manual mode. Then according to & quot; Connect the reference table & quot; Hints, an accurate reference to ammeter connected to the transmitter, pay attention to the positive and negative on both ends of the connection, and then select OK, finally will be the scene of the device output set to 4 ma, the transmitter output is 4 ma. Then record the actual value of reference table, in & quot; Input instrument value & quot; Tip in the input, output of looking at hand operator is sluggish and reference table values. If not consistent, continue to input reference and check whether agree with the hand operator output; If consistent, then change the 4 ma to 20 ma for reference and hand again, comparing the operator output value until the accurate the final step, will & quot; Control circuit & quot; Set to automatic control, after completing all operations.