ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter
7-1
Chapter 7 :
Maintenance and Troubleshooting
This section explains the maintenance of the ST 3000 Smart Transmitter and a range
of interesting ways to ensure that your transmitter’s performance goals may be contin-
uously met during its operating life, including instructions for:
• saving data in this transmitter,
• disassembly and assembly procedures,
• output checking,
• calibration procedures, and troubleshooting procedures.
At the start of operation or during operation, deal with performance problems by fol-
lowing these procedures. If you cannot fix the problem, it is possible that there is a
problem with the product itself and you should contact your Yamatake representative
immediately.
7-1 : Zero Adjustment
7-1-1 :Overview
Introduction
Zero adjustments can be classified as:
1. Calibrating the zero point based on the current input value
2. Setting the set range (LRV/URV) based on the current input value
Items for adjustment
The two adjustment methods are clearly delineated, below. Explanations of these pro-
cedures are found, on subsequent pages.
1) Zero adjustment for use under uniform pressure (with SFC)
2) Balance adjustment using sealing liquid (with SFC)
3) Zero adjustment for use as a level gauge (with SFC)
4) Zero adjustment using an external zero adjustment mechanism (option)
