Summary of Contents for Gems XT-1000
- Page 1 Technical Documentation XT-1000 The magnetostrictive level sensor Edition: 11-2010 Version: 1 Article no.: 233571 Gems Sensors & Controls One Cowles Rd Plainville CT Telephone 800-378-1600...
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Page 3: Table Of Contents
Technical data ....................17 Sensor.......................... 17 Floats ........................... 19 © Copyright: Reproduction and translation only with the written consent of GEMS Sensors & Controls. GEMS Sensors & Controls reserves the right to carry out product alterations without prior notice. XT-1000 Page 3/19... -
Page 4: Properties
1 (zone 0) or category 1/2 (zone 0/1) are required. Operating on the digital HART protocol, the XT-1000 HART level sensor is able to output the position of the first, second or both floats (refer to the XT-1000 HART documenta- tion). -
Page 5: Safety Instructions
Safety instructions The purpose of the XT-1000 level sensor is to gauge liquid levels in tanks. Use the level sensor for this purpose only. The manufacturer accepts no liability for any form of damage resulting from improper use! The level sensor has been developed, manufactured and tested in accordance with state- of-the-art technology and with recognized safety rules and regulations. -
Page 6: Design And Mode Of Operation
Design and mode of operation The design of the XT-1000 level sensor has been illustrated using the version with screw- in unit (see Figure 1). Inside sensor head (1) of the level sensor, concealed by cap (2), are the protected terminal clamps and configuration buttons. - Page 7 The time between the current pulse being transmitted and the wave arriving at the sensor head is measured. From these propagation times, it is possible to determine the current position of the float. Figure 2: operating principle of the XT-1000 level sensor XT-1000 Page 7/19...
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Page 8: Installation
Also observe any local safety regulations and accident prevention regulations which are not stated in these operating instructions. This section describes how to install the level sensor. The procedures for each version are described separately (see Figure 3). Figure 3: XT-1000 versions Page 8/19 XT-1000... -
Page 9: Installation With Screw-In Unit
(2) If necessary, slot screw-in unit (4) onto the probe tube. (3) Insert the level sensor into the tank, provide screw-in unit thread (4) with a suitable sealing material, screw it in and tighten. (4) Slide float (2) back onto probe tube (3). XT-1000 Page 9/19... -
Page 10: Installation With Flange
To ensure reliable gauging, the probe tube must be fitted with no deformation on the outside. The distance between the probe and bypass tubes must be as small as possible. Only floats approved by GEMS Sensors & Contr0ls can be used. Page 10/19 XT-1000... - Page 11 XT-1000-B Distance between probe tube and float center: max. distance from the SureSite float SureSite float max. magnet position Probe tube fitted without tension (undeformed) SureSite housing Magnet position Spacer Probe fixture bracket (nonmagnetic) min. magnet position SECTION A-A Figure 5: installation with SureSite...
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Page 12: Electrical Connection
8 V in the event of maximum current draw (21.5 mA). The sensor head and probe tube of XT-1000 Standard are made of stainless steel. The level sensor without Ex approval is installed in accordance with the following wiring... - Page 13 Protect the sensor head against the ingress of water. An external cable diameter of 0.2” to 0.4” mm ensures reliable sealing of the cable entry. Make sure that the cable gland is screwed tight, and close the sensor head cap firmly. XT-1000 Page 13/19...
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Page 14: User Configuration
Measuring span at the level sensor To enable configuration of the 4 mA and 20 mA points at the XT-1000 level sensor, two buttons and an LED (light emitting diode) are provided near the terminals inside the sensor head. - Page 15 For “dry” settings to be possible in the case of bypass sensors, a magnetic system with spacer bracket will need to be obtained from the manufacturer of the bypass. Configuration can then be carried out even with the sensor removed. XT-1000 Page 15/19...
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Page 16: Current Consumption In Failure Mode
If, during operation, the level sensor detects that the level cannot be output correctly due to an insufficient supply voltage, it enters failure mode and sets current consumption to 3.6 mA (regardless of any failure current settings). Page 16/19 XT-1000... -
Page 17: Technical Data
Two-line terminal 4 to 20 mA (3.8 to 20.5 mA) current consumption for level display 21.5 mA (3.6 mA) current consumption in failure mode Supply voltage: XT-1000 8 to 30 V DC Process connection Screw-in unit with the option of infinitely variable height adjustment Standard G ½... - Page 18 ±0.001 % per K, component Repetition accuracy better than 0.02” Resolution better than 0.002” Accuracy Linearity better than ±0.01 % Analog component Temperature drift better than ±0.01 % per K Resolution better than 0.5 μA (16 bit) Page 18/19 XT-1000...
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Page 19: Floats
Pressure resistance is guaranteed for undamaged floats only. Even the most minor and invisible dents, which can occur if, for exam- ple, the float is dropped from a bench onto a stone floor, are suf- ficient to cause a significant deterioration in pressure resistance. XT-1000 Page 19/19...