There are two methods for calibrating a displacer level transmitter. 1. Wet calibration (by using water) 2. Dry calibration (by using calculated weights) 1. WET CALIBRATION : Wet calibration of level troll means calibration using water. Before we calibrate the displacer level transmitter, we must aware that the transmitter has been set at factory as per process fluid specific gravity (SG) if Level Troll working principle An interesting design problem for displacement-type level transmitters is how to transfer the sensed weight of the displacer to the transmitter mechanism while positively sealing process vapor pressure from that same mechanism. The most common solution to this problem is an ingenious mechanism called a torque tube. Choose the titanium Level TROLL® 700 instrument when you need a water level instrument with exceptional performance. Professional logging options expand functionality: Linear average, step linear, true logarithmic, and fast linear (4x/second) logging in addition to standard linear, fast linear, and event. 8A fast logging rate of 4 logs per second. perature data loggers. By partnering with In-Situ® Inc., you receive durable Level TROLL® Data Loggers that pro-vide years of service, accurate results, intuitive software, and real-time functionality. FEATURES • Increase productivity: Reduce training and installation time with In-Situ Inc.'s. intuitive software platform and integrated LineTroll R400D User Manual This document describes the Installation-, configuration and use of LineTroll R400D Fault Passage Indicator Information in this document is subject to change without notice. No parts of this documentation may be reproduced in any form by any means without the written permission of Nortroll AS. This operator's manual is designed as both a start-up guide and a permanent reference for the Level TROLL's features and applications. Section 1: Introduction to the Level TROLL Operator's Manual and to In-Situ Inc. — Warranty Provisions — Instrument Repair & Return Recommendations 7 Level trOllOperator's Manual0052210 rev. 006 The newest addition to the In-Situ line, the LevelTROLL 400 is a maintenance-free tool for long-term monitoring of water level, pressure and temperature. This water level data logger is available in four pressure ranges—from 30 psia to 500 psia. Made of durable titanium, the LevelTROLL 400 outlasts the competition. Applications The LevelTROLL 500 is suitable for use in almost any application where accurate monitoring of water level and temperature is needed. For situations where a stainless steel logger can safely be deployed — such as aquaculture and lake and reservoir monitoring — the more economical 400-level instrument may be an acceptable alternative. Level TROLL700 Operator's Manual08/05 SECTION 1: INTRODUCTION If an instrument returned for servicing shows evidence of having been deployed in a toxic or hazardous environment, Customer Service personnel will require written proof of decontami- nation before they can service the unit. 2. This manual provides installation, operating, calibration, maintenance, and parts ordering information for 2500 and 2503 pneumatic controllers and transmitters used in combination with 249 displacer sensors. Note This manual does not include installation or maintenance procedures for the supply pressure regulator, sensor, or other devices. Perfect for clinical and research use, the LevelTROLL® 700 is narrow enough to fit into wells and tubing as small as one inch in