Foxboro pressure transmitter in use, the need to understand the pressure transmitter common fault introduction, but also need to understand the transmitter measurement to check the part. 

Folkboro pressure transmitter use and installation method caused by improper problems mainly include the following aspects: pressure pipe leakage or blockage, liquid filling pipe residual gas or gas pipe residual liquid, pressure transmitter process flange deposit, the formation of dead zone measurement; The installation is not strictly in accordance with the technical requirements, and the on-site environment and installation method of the temperature transmitter do not meet the technical requirements; Primary components such as orifice plate, remote measuring joint, etc., the installation or plugging form is not correct, the pressure point is not reasonable; Pressure transmitter wiring is not correct, the power supply voltage is too low or too high, the instrument wiring terminal and the indicator head connection contact is poor.

Inspection of the measuring part of the pressure transmitter: any fault in the measuring part of the pressure transmitter will cause abnormal or no output of the pressure transmitter. Therefore, the measuring sensitive parts of the pressure transmitter should be checked first. 1. Remove the flange and check whether the isolation diaphragm of sensitive parts has deformation, oil leakage, and damage. 2. Remove the compensation plate, do not take out the sensitive parts, check the insulation resistance inserted against the shell, the insulation resistance should not be less than 100M under the condition of the voltage does not exceed 100V. 3. Connect ventilation circuit and circuit, when the pressure signal is at the upper limit of the range, close the air source, the output voltage, and reading value should be stable. If the output voltage drops, it indicates that the pressure transmitter has a leak, which can be checked out with soapy water.

ABB	Honeywell	GE Fanuc	Yokogawa
ECC 086387-001	10024/1/1	IC695PSA040	AAI143-H00/K4A00
07 KT 97 07KT97 GJR5253000R0270	TSAI-1620M	VMIVME-7750-746000	YS170-012 S4
07 KT 98 07KT98 GJR5253100R0220	TK-PRS021	VMIVME-7671-421000	YNT512D-Q12
07AI91 WT91 GJR5251600R4202	TK-PRR021	VMIPCI-5565-110000	YHC4150X-01 YHC4150X
07BT62R1	TK-PPD011 51309241-175	VIPC616	Y9612YU
07CR41-C12	TK-PPD011	V7768-320000	VI702 S1
07DC91	TK-OAV061	URRHH	VI702
07DC91 GJR5251400R0202	TK-IOLI01	UR9KH	VI701 S1
07DC92	TK-FXX102	UR9EH	VI701
07DC92 GJR5251600R0202	TK-FTEB01	UR-8NH GE	VI451-10 S2
07DC92 GJR5252200R0101	TK-FPDXX2	UR8LH GE	VF702
07DI92	TDCS3000LCN	UR8HH	VF701 VF701 S3