Series 7250 Product Manual CONTINUOUS LEVEL CONTROLS 7250 Series HR Digital Stik ABSOLUTE PROCESS CONTROL KNOW WHERE YOU ARE...
7250 Series Manual Overview This document explains the basic hardware interface requirements, operating characteristics and describes the software protocols for the 7250 series HR Digital Stik. In addition, the dimension and installation drawings, part number sequence and agency approvals have been included in the back of this document.
There are currently two different software protocol versions available (7252 and 7255). In actuality, the ‘protocols’ are very similar. The significant difference is the amount of product measurements transmitted within the data string. A unique start character is also sent at the beginning of each data string to identify the data string type, or hence, the ‘protocol’.
Calculation of Checksum: All the ASCII characters (from and including the start character to and including the comma (‘,’) after the final temperature digit) in the data string are added together. From this number, the least significant byte is used for the checksum value and is transmitted in its equivalent ASCII characters. Note that capital letters MUST be used for the upper hex values (i.e. ‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’).
Installation IMPORTANT Be sure to read & understand all of the Instructions before beginning. It is recommended that a minimum of a 2” NPT pipe opening be used. Unpacking Carefully remove the contents of the shipping carton and check each item against the packing list before destroying any packing materials. Storage Level gauge probes should be stored in their original shipping containers until ready for installation. Damage that occurs in storage is not covered under manufacturer warranty.
7250 Series Specifications Specifications Indicated Level up to one product reading and one interface reading Logic Levels 316 Stainless Steel Resolution1 Repeatability Linearity Hysteresis Lengths up to 288” 0.0001” Equal to Resolution +/- 0.01%2 +/- 0.002%3 PVDF (Rigid) Resolution1 Repeatability Linearity Hysteresis Lengths up to 192” 0.0001” Equal to Resolution +/- 0.01%2 +/- 0.
250 Installation Drawing 7
7250 Dimension Drawing 8
7250 Dimension Drawing 9
EC Declaration of Conformity 10
Other Products Copyright 2012 by AMETEK AUTOMATION & PROCESS TECHNOLOGIES. All Rights Reserved. Made in the USA. ® AUTOMATION & PROCESS TECHNOLOGIES 1080 N. Crooks Road, Clawson, MI 48017-1097 Phone: 248-435-0700 Toll Free: 800-635-0289 Fax: 248-435-8120 www.ametekapt.com 7250.M9R 6/12.
