Meriam M1500 Digital Pressure Transmitter - Manual (Page 21)

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Recertification and Recertification and Recertification and Recertification and Recalibration Recalibration Recalibration Recalibration
Meriam recommends annual calibration check and recertification for the M1500. Contact Meriam for this service.
Periodic recalibration of M1500 Digital Pressure Transmitters may be necessary to maintain optimum performance.
Meriam can also provide this service.
The M1500 does support field recalibration through the Meriam Setup Utility provided on the product CD ROM.
Connect the PC to the M1500 according to the “PC / M1500 Interface” and “Installation and Operation” sections of
this manual. Install the software as directed by the CD instructions on a suitable PC. Select the Field Recalibration
Interface button and follow the directions provided by the software.
Field recalibration should only be executed by qualified personnel using suitable reference standards. These
standards should meet the accuracy requirements of your company or industry. Meriam recommends using primary
standards at least four times more accurate than the unit under test.
For pressure transmitters up to 200 PSI, Meriam recommends a deadweight tester of at least ±0.0015% of reading for
field recalibration. For transmitter ranges of 200 PSI and above, use a deadweight tester of at least ±0.0030% of
reading. When calibrating using a dead weight tester referenced to inches of water, be sure the M1500’s inches of
water reference temperature matches that of the dead weight tester’s calibration data.