Manual de instrucciones de Teledyne 202

Manual de instrucciones del aparato Teledyne 202

Aparato: Teledyne 202
Categoría: Recambios para coche
Fabricante: Teledyne
Tamaño: 0.64 MB
Fecha de añadido: 11/7/2014
Número de páginas: 24
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Resumen del contenido incluido en la página 1

TELEDYNE
HASTINGS
INSTRUMENTS
INSTRUCTION MANUAL
200/202 SERIES
FLOWMETERS/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

Resumen del contenido incluido en la página 3

Table of Contents 1. GENERAL INFORMATION....................................................................................................................................4 1.1. FEATURES............................................................................................................................................................4 * 1.2. SPECIFICATIONS HFM-200 ........................................................................................................................

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1. General Information The Hastings HFM-200 mass flow meter and HFC-202 flow controller are designed to accurately measure and control mass flow over the range of 10 sccm to 30 slm, without corrections or compensations for gas pressure and temperature with an accuracy of better than ±1% FS. Hastings mass flow instruments do not require any periodic maintenance under normal operating conditions with clean gases. No damage will occur from the use of moderate overpressures (~500 psi/3.45MP

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* 1.2. Specifications HFM-200 1 Accuracy and Linearity ........................................................................................................................±1% F.S. Repeatability .....................................................................................................................................±0.05% F.S. Standard Pressure Rating ....................................................................................................................... 500 psig

Resumen del contenido incluido en la página 6

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 output

Resumen del contenido incluido en la página 7

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 the Power Pod 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 Power Pod 400 bulletin on the Hastings web site. http://www.teledyne-hi.com/pdfs/bulletins.htm 140-072011 200/202 Series Page 7 of 24

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2. Installation and Operation This section contains the steps necessary to install 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 HFM-200/HFC-202 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 shi

Resumen del contenido incluido en la página 9

2.4. Mechanical Connections 2.4.1. Standard Configuration 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-zeroe

Resumen del contenido incluido en la página 10

EXAMPLE: Suppose a 4” LFE is selected. The length of 4” diameter tubing or pipe, upstream of the sensor inlet tap, will be a minimum of 20“. The minimum length of 4” tubing or pipe downstream from the sensor outlet tap will be 4”. The length of additional 4” inlet tubing required for the 4” LFE is 20” – 2.5” = 17.5”. The additional length of 4” tubing required for the outlet side of the 4” LFE is 4” – 2.5” = 1.5”. This brings the overall length of the assembly to 19”. Tubular c

Resumen del contenido incluido en la página 11

24 Volt Connections Refer to the diagram to the 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 isolated from all other pins. General Connection Notes Pin 7 of the DA-15 (15 Volt), Pin 9 of the DE-9 (24 Volt) is the case ground. It should be connec

Resumen del contenido incluido en la página 12

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 an apparent zero shift. For the standard 0 - 5 VDC output, adjust the zero potentiometer located on the lower outlet side of the flow meter until the meter indicates zero. For the optional 4 -

Resumen del contenido incluido en la página 13

The “COMMAND” pot adjusts the Analog command signal sent to the flow controller. The setting for each controller connected to the power supply can be observed. (Depending on how the power supply was set up, the display could indicate in flow units or percent of full scale). Hastings Power Supply Feature Guide Feature Model 40 Power Pod 100 Power Pod 400 Digital Readout ±15 Volts Analog Outputs Controller Analog Control Front Panel Override Totalizer 4 -20

Resumen del contenido incluido en la página 14

2.7.3. Operation with an external sensor (Fig. 2.2) In some instances, it might be desirable to use an external Fig 2.2 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 – 5 VDC (or 0 - 10 VDC) output from an external sensor at pi

Resumen del contenido incluido en la página 15

controller circuit establishes control at the new command point. This jumper does not affect the system gain and will not dampen out oscillations. To adjust the response, you need a means of producing a step change in the command voltage from 10% of full scale to 100% of full scale. Follow the steps outlined below: 1) Cover the pins of JP4/JP6 with a jumper. (see fig. 2.2 & fig 2.3) 2) Set the command voltage to 10% of full scale. Allow the flow to stabilize. 3) Step change the command

Resumen del contenido incluido en la página 16

3. Theory of Operation This section contains a functional description of Hastings flow controllers. Detailed schematics and parts lists can be obtained by contacting Hastings using the contact information found at the end of this document. 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 Functiona

Resumen del contenido incluido en la página 17

relatively constant over wide ranges of temperature and pressure, the flow meter may be calibrated directly in mass units for those gases. Changes in gas composition usually only require application of a simple multiplier to the air calibration to account for the difference in heat capacity and thus the flow meter is capable of measuring a wide variety of gases. The HFM sensor measures approximately 10 sccm, full scale flow. 3.3. Electronics The Hastings HFM-200/HFC-202 series uses a ther

Resumen del contenido incluido en la página 18

3.5. Valve The control 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 electrical coil which, when energized with electrical current, lifts the plunger off the orifice and al

Resumen del contenido incluido en la página 19

4. Maintenance This section contains service and calibration information. Some portions of the instrument are delicate. Use extreme care when servicing the flow controller. 4.1. Authorized Maintenance With proper care in installation and use, the flow controller will require little or no maintenance. If maintenance does become necessary, most of the instrument can be cleaned or repaired in the field. Some procedures may require recalibration. Do not attempt these procedures unless fac

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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. SYMPTOM: Flow meter reads other than 0.00 VDC with no flow, or there is a small flow when flow meter reads 0.00 VDC. CAUSE: ZERO potentiometer is out of adjustment. ACTION: Shut off all flow. Adjust ZERO potentiometer u


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