How to migrate a Rosemount 3051S double-flange differential pressure transmitter?
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The goods sent by the manufacturer were designed with the two flanges in the same plane; therefore, after installation the transmitter shows a negative value. Zero adjustment is required. The zero trim function on the field operator unit doesn’t work, and attempting to adjust the zero on the transmitter’s panel also has no effect. I’m not sure what’s going on Could a technician who has done this before come and talk about it? The table is from Beijing Yuan Dong, and the handheld controller is from Honeywell; adjusting the Honeywell transmitter previously worked without any problems.
Now, when migrating a transmitter, there is no need to calculate the pressure due to the capillary silicone oil level; simply add the static pressure to the range value. . :)
Generally, 375 and 475 are used to set zero-point shift via software. The mechanical zero-point adjustment of the hardware can be disabled through software settings; especially when the 3051 is used on a large scale, PRM or AMS resource management software can be utilized to make such adjustments in the office. On-site, it can be installed in the cabinet room or junction box.
Agree with the view from the 2nd floor; the design for the Far East should be fine – just follow what’s specified in the installation design specifications
The on-site handheld controller cannot be used to adjust the zero trim, and adjusting the zero on the transmitter panel also has no effect. Zero-point migration is not about adjusting the zero point; it refers to the low limit. I’m not sure if it’s called Low limit, but the original poster should give it a try.
Stop migrating; use the current negative value as the lower limit of the range, and add the liquid level height pressure as the upper limit! Please refer to
Use the process value as the zero point; then subtracting the process value from the range gives the upper limit. This can be done using Hart375.
It’s set now, thank you all! Can’t the indicator in the header just be set to zero?
It can be changed directly using 375; for example, if the range is from -10 kPa to 20 kPa, after the double flange installation, a value will be displayed, such as -13 kPa. To perform the migration, you just need to change the range from -10-(-13) kPa to 20-13 kPa, which corresponds to -23 kPa to 7 kPa.
Could the range calculated upstairs be correct? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Well, I have carried out such zero-point migrations on-site before. It’s a double-flange type for measuring liquid level; it’s just that the zero point has changed! Just change the range