MAGNESONIC Jerguson Series JDT

Changing process liquid level causes the displacer element, which is supported by a spring, to rise or fall. An armature, located in the pressure tube of the head, is directly linked to the displacer and moves vertically with the displacer element. In the enclosure and around the outside of the pressure tube is a Linear Variable Differential Transformer (LVDT) which provides an output proportional to the position of the armature within the pressure tube. Sophisticated surface mount electronics process the voltage signal from the LVDT into a 4-20mA output signal. The pressure tube is made of stainless steel and is welded to the enclosure fitting effectively containing the process pressure and temperature. This design ensures process conditions are contained and isolated in the pressure vessel. Dimensional Information

The displacer length is determined by the operating range (span) specified, the S.G., pressure. and temperature of the process. The diameter and weight are factory calculated to ensure the correct operation of the armature in the head. providing accurate 4-20mA output.

Each transmitter is fitted with a visible LED which flashes once every 3 seconds to show the instrument is operating and functioning correctly. The instrument span or zero may be adjusted on line by using the unique Mobrey "Caliplug" and a magnet screwdriver.  Larger Image of MLT100

• 2 wire 24 DC Loop Powered
• 4-20 mA Output
• Hart Digital Communications
• Explosion Proof and I.S. Versions
• Simple Local or Remote Calibration
• Non-interactive Zero and Span
• Level, Contents or interface measurement
• Optional local indicator

The Mobrey Level Transmitter is one of the most advanced available, utilizing the time proven buoyancy principle and incorporating state of the art electronics for high reliability and stability.

The transmitter may be mounted directly into a vessel or externally in a chamber to allow isolation for maintenance or onsite calibration checks. The 4-20rnA output from the head is proportional to the level or contents in the vessel, or may be used to measure an interface. The Mobrey transmitter supports the HART protocol as standard, which is superimposed on the 4-20mA signal. The user may operate the transmitter without digital communications or take advantage of the many features of'11ART such as remote calibration. reranging, on-line diagnostics and multidrop installations.

• CENELEC EExd IIc T6 Certificate No. Ex 97D1291X
• CENELEC EEx ia IIc T5 (-40 °C to +40 °C) Certificate No. Ex97D2379X
• CENELEC EEX is IIc T4 (-40 °C to +80°C) Certificate No. Ex97D2379X
• UL Cl. 1. Div.II Grps. B, C. & D

The Mobrey MLT will operate in most level measurement ap­plications including:

• Knock-out pots
• Condensate drums
• Separators
• Flash vessels
• Storage vessels
• Receiver tanks

The transmitter is configured by the factory to operate in the process conditions advised at the time of order, and the displacer element dimensions are chosen to suit the maximum required span. However, provisions are made to check the calibration once on site and fine tune the calibration with the instrument in an empty vessel at 20°C, or with the instrument at operating conditions.

May be accomplished locally at the transmitter by using the MMS to "zero" the device with the level at the required 4 mA point, then to "Span" the device with the level at the 20 mA point. The Zero and Span settings are non-interactive.

An additional feature is the ability to span the instrument without the vessel being filled to the 20 mA point. In this case, the vessel is filled to a known level and the output in­creased to give the corresponding mA level. The 20 mA point is then electronically calculated by the instrument provided the output is linear.

Where a chamber is specified, only certified materials to ANSI and ASTM are used. Welding is qualified to ASME IX and designed in accordance with ANSI B31.3.

All pressure retaining parts are hydrostatically pressure tested to a minimum of 1.50 times working pressures. Other NDT including radiography & dye penetrate testing is available when specified at time of order. Inspection by customers or their appointed agents is welcome provided this is requested at time of order.

• Output: 4-20mA SMART/HART digital 10-120 in. (300-3000mm)
• Range 10-120 in. (300-3000mm)
• Max. operating pressure 2200 PSIG (153 bar) higher as special
• Min. operating pressure Full vacuum
• S.G. range standard 0.25 to 1.5 interface 0.1 difference
• Max. operating temp. 608°F (320 ° C) (non-condensing)
• Min. operating temp. -76 ° F (-60 ° C)
• Ambient temp. -40 to -1 76°F
• Accuracy -1 0 1 10 output span
• Repeatability _-0.2°'0 of output span
• Linearity 0.2°% of output span
• Resolution 0.1 °o of output span
• Hysteresis 0.3°.~ of output span

The HHC is fitted with a datapack which allows full access to all of the MLT100 parameters. May also be used with the Mobrey MSP100 ultra­sonic level transmitter and the Mobrey 4301 pressure transmitter. Ordering information: N4013REY-CKI

A Windows based PC programming tool which allows full communication with Mobrey HART products. H-View provides access to all of the instrument parameters allowing programming and interrogation. Also supported is Dynamic Data Exchange (DDE) which allows export and import of any parameter or measured variable into a Windows package such as Microsoft Excel where dynamic mimics can be displayed. General note

All HART communicator devices from Mobrey allow access and programming of the universal commands and some common practice commands of any HART instrument, regardless of manufacturer.