# How to carryout a field zero check on a pressure transmitter

**URL:** <https://forumautomation.com/t/how-to-carryout-a-field-zero-check-on-a-pressure-transmitter/55>\
**Category:** Pressure Measurement\
**Created:** [October 2, 2014, 5:37pm UTC](https://forumautomation.com/t/how-to-carryout-a-field-zero-check-on-a-pressure-transmitter/55 "2014-10-02T17:37:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![instrumen](https://forumautomation.com/letter_avatar_proxy/v4/letter/i/65b543/32.png) [@instrumen](https://forumautomation.com/u/instrumen)\
**Post date:** [October 2, 2014, 5:37pm UTC](https://forumautomation.com/t/how-to-carryout-a-field-zero-check-on-a-pressure-transmitter/55/1 "2014-10-02T17:37:15Z")

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- If the transmitter signal is used for controlling, then put the controller on manual.
- Connect a digital multimeter in the current range in series with the transmitter output.
- Isolate the process valve
- Isolate the instrument isolation valve.
- Open the equalizing valve
- Open the bleed valve and de-pressurize the transmitter.
- Check for 4.00mA output signal, if not, adjust the zero screw.