Manual de instrucciones de Teledyne 203

Manual de instrucciones del aparato Teledyne 203

Aparato: Teledyne 203
Categoría: Recambios para coche
Fabricante: Teledyne
Tamaño: 0.63 MB
Fecha de añadido: 11/7/2014
Número de páginas: 23
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Resumen del contenido incluido en la página 1

TELEDYNE
HASTINGS
INSTRUMENTS
INSTRUCTION MANUAL
201/203/205/207 SERIES
FLOW METERS/CONTROLLERS
ISO 9001
CER T IFIED

Resumen del contenido incluido en la página 2

Manual Print History The print history shown below lists the printing dates of all revisions and addenda created for this manual. The revision level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between revisions, contain important change information that the user should incorporate immediately into the manual. Addenda are numbered sequentially. When a new revision is created, all addenda associated with the previous revision of the

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Table of Contents 1. GENERAL INFORMATION ............................................................................................................................................ 4 1.1. FEATURES .................................................................................................................................................................... 4 1.2. SPECIFICATIONS HFM-201/205 ..................................................................................................

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1. General Information The Hastings HFM-201/HFM-205/HFC-203/HFC-207 series Mass flow meters (HFM-201/HFM- 205) and controllers (HFC-203/HFC-207) are designed to accurately measure and control mass flow over the range of 30 slm to 2500 slm, without corrections or compensations for gas pressure and temperature with an accuracy of better than ±1% from the mean (±2% FS for 201/203 units in the ½” fitting size base with flows >500 slm). Hastings mass flow instruments do not require any periodic

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1.2. Specifications HFM-201/205 1 Accuracy and Linearity ....................................................................................................... ±1% F.S. Repeatability .................................................................................................................. ±0.05% F.S. Standard Pressure Rating ...................................................................................................... 500 psig Pressure Coefficient .......................

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1.4. Optional 4 - 20 mA Current Output An option to the standard 0 - 5 VDC output is the 4 - 20 mA current output that is proportional to flow. The 4 - 20 mA signal is produced from the 0 - 5 VDC output of the flow meter. The current loop output is useful for remote applications where pickup noise could substantially affect the stability of the voltage output or long cable runs where cable resistance would cause a voltage signal to decay. The current loop signal replaces the voltage outp

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feature. More information about Hastings Instruments’ power supplies can be found on the Hastings web site. http://www.teledyne-hi.com/products/powerpod-series.htm 1.5.2. Interconnecting Cables Cables are available from Hastings, in various lengths, to connect from the 15 pin "D" connector on the back of Hastings power supplies directly to any of the 200 series and 300 series flow instruments (including digital versions). More information about the available cables can be found in the T

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2. Installation and Operation This section contains the necessary steps to get a new flow meter/controller into operation as quickly and easily as possible. Please read the following thoroughly before attempting to install the instrument. 2.1. Receiving Inspection Carefully unpack the Hastings 201/203 series instrument and any accessories that have also been ordered. Inspect for any obvious signs of damage to the shipment. Immediately advise the carrier who delivered the shipment if an

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2.4. Mechanical Connections The flow meter may be mounted in any position as long as the direction of gas flow through the instrument follows the arrow marked on the bottom of the flow meter case label. The preferred orientation is with the inlet and outlet fittings in a horizontal plane (if operating with a dense gas or at high pressures the instrument must be installed horizontally). When mounted in a different orientation the instrument should be re-zeroed at zero flow with the system

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the ground connection at the power supply. Do not connect them together at the flow controller as the resulting crosstalk could result in flow instabilities. 24 Volt Connections Refer to the diagram at right when connecting 24 Volt units. Connect the positive lead of the power supply to pin 7 of the DE-9 connector and negative lead to pin 4. The supply input is diode protected such that reversing the input polarity will not damage the instrument. The power supply is galvanically iso

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some zero offset.) The 201/203 series is intended for use in non-condensing environments only. Condensate or any other liquids which enter the flow meter may destroy its electronic components. 2.6.2. Zero Check Turn the power supply on if not already energized. Allow for a 1 hour warm-up. Stop all flow through the instrument and wait 2 minutes. Caution: Do not assume that all metering valves completely shut off the flow. Even a slight leakage will cause an indication on the meter and

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2.6.5. Operation with a Hastings power supply. There are two controls for each flow controller connected to a Hastings power supply. A switch labeled “OPEN; AUTO; CLOSED” (valve override THPS 400 only) and a potentiometer labeled “COMMAND”. For normal operation, the valve override switch will be in the “AUTO” position. The “CLOSE” position removes all power from the valve, shutting off flow regardless of the command pot setting. The “OPEN” position applies full available valve voltage t

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2.6.7. Operation with an external sensor. (Fig. 2.2) In some instances, it might be desirable to use an external sensor to provide process information to the control circuitry in the flow controller. For example, you might want to control the pressure in a vacuum system by adjusting the rate at which the system is backfilled with a gas. The new, enhanced HFC series of flow controllers have provision for accepting a 0 - 5VDC (or 0 - 10 VDC) output from an external sensor at pin 13 of the

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3) Step change the command voltage to 100%, and observe the flow through the controller. If the overshoot is too large, remove the jumper. Reset the command voltage to 10%, and allow the controller to stabilize. 4) To prevent loss of the unused jumper, place it over one pin only on JP4/JP6. 2.6.9. Operating Temperature For proper operation, the combination of ambient temperature and gas temperature must be such that the Flowcontroller temperature remains between 0 and 50°C. Most accurate

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3. Theory of Operation This section contains an overall functional description of HFC Flow Controllers. Detailed schematics and parts lists can be found at the end of the manual in Section 6.0. In this section and other sections throughout this manual, when a power supply is mentioned, it is assumed that the customer has a Hastings Power Supply. These sections are not applicable if another type of power supply is used. 3.1. Overall Functional Description: The HFC Flow Controller consi

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output is sent to the terminals on the back and to the decoding circuitry in the display which converts it to a 3-digit output. The controller circuitry utilizes the Command and the Flow voltages as input signals. The 0 - 5VDC command signal is subtracted from the 0 - 5VDC flow signal creating an error signal. This signal is amplified and causes the solenoid valve to move. The amount and direction of the movement is dependent upon the value and the sign of the error signal, and ten

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3.5. Valve: A solenoid valve is used as a pilot valve to control a much larger pneumatic diaphragm valve. The pilot valve is an “automatic metering solenoid” valve. While most solenoids operate in either the fully open or fully closed state, the automatic metering solenoid valve is designed to control flow (see Figure 3.5). A spring, connected to the plunger assembly, holds a magnetic plunger tightly against an orifice to shut off flow. The magnetic plunger is surrounded by an electric

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4. Maintenance This section contains service and calibration information. Some portions of the instrument are delicate. Use extreme care when servicing the flow controller. The potentiometer positions and the electrical components referred to in the troubleshooting section can be found in Section 6.0 on the electrical component layout drawing. 4.1. Authorized Maintenance With proper care in installation and use, the flow controller will require little or no maintenance. If maintenance

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restriction is pneumatically close to the downstream end of the flow controller. The differential pressure across the unit must be between 10-50 psig. SYMPTOM: Little or no flow, even with Valve Override switch OPEN. CAUSE: Plugged orifice. ACTION: Verify the presence of a 10-50 psig pressure across the instrument. If present, shut off gas supply and power supply. Remove orifice per Section 4.9. Examine orifice. If plugged, clean or replace as applicable. Reassemble valve. SY

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stability. If the instrument is not shutting completely off when Valve Override switch is in the CLOSE position, the orifice may require approximately 1/8 turn clockwise. 4.4. End Cap Removal: The end cap on the inlet side must be removed to gain access to the filter or shunt assembly. First shut off the supply of gas to the instrument. Disconnect the Swagelok fitting on the inlet and outlet sides of the transducer, and remove it from the system plumbing. Remove the four hex bolts holdin


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