Rosemount 755R Instruction Manual
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Rosemount 755R Instruction Manual

Rosemount 755R Instruction Manual

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Rosemount Analytical
M
755R
ODEL
O
A
XYGEN
NALYZER
I
M
NSTRUCTION
ANUAL

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  • Page 1 Rosemount Analytical 755R ODEL XYGEN NALYZER NSTRUCTION ANUAL...
  • Page 2 E.I. duPont de Nemours and Co. Inc. ® Teflon is a registered trademark of E.I. duPont de Nemours and Co., Inc. Manual Part Number 748213-P June 1997 Printed in U.S.A. Rosemount Analytical Inc. 4125 East La Palma Avenue Anaheim, California 92807-1802...

  • Page 3: Table Of Contents

    ISOLATED CURRENT OUTPUT ..............1-2 ALARM OPTION..................1-2 ELECTRICAL OPTIONS................1-2 REMOTE RANGE CHANGE OPTION............1-2 2. I ECTION NSTALLATION FACILITY PREPARATION ................2-1 2.1.1 Installation Drawings ..............2-1 2.1.2 Electrical Interconnection Diagram..........2-1 2.1.3 Flow Diagram .................2-1 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...
  • Page 4 SELECTION OF SETPOINTS AND DEADBAND ON ALARM OPTION.. 3-7 CURRENT OUTPUT BOARD (OPTION) ..........3-7 4. O ECTION PERATION ROUTINE OPERATION ................4-1 EFFECT OF BAROMETRIC PRESSURE CHANGES ON INSTRUMENT READOUT ..................4-1 CALIBRATION FREQUENCY ..............4-2 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...
  • Page 5 Control Board Checkout..............7-2 HEATING CIRCUITS ................7-3 7.2.1 Case Heater Control Circuit ............7-3 7.2.2 Detector/Magnet Heating Circuit ..........7-3 DETECTOR CHECK.................7-4 7.3.1 Source Lamp................7-5 7.3.2 Photocells..................7-6 7.3.3 Suspension .................7-6 REPLACEMENT OF DETECTOR/MAGNET ASSEMBLY COMPONENTS................7-6 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...
  • Page 6 CONTROL BOARD SETUP ..............7-9 SECTION REPLACEMENT PARTS CIRCUIT BOARD REPLACEMENT POLICY ........... 8-1 SELECTED REPLACEMENT PARTS ............. 8-1 & S ENERAL RECAUTIONS FOR ANDLING TORING RESSURE YLINDERS ARRANTY IELD ERVICE AND EPAIR ACILITIES Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...
  • Page 7 ONTENTS IGURES Model 755R Oxygen Analyzer ..............1-1 Interconnection of Typical Gas Manifold to Model 755R ......2-3 Model 755R Rear Panel ................2-7 Connections for Potentiometric Recorder with Non-Standard Span..2-8 Model 755R Connected to Several Current Activated Output Devices..2-9 Relay Terminal Connections for Typical Fail Safe Applications....2-10 Typical Alarm Settings ................2-13...
  • Page 8 ONTENTS OTES Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 9: Preface

    NTENDED TATEMENT The Model 755R is intended for use as an industrial process measurement device only. It is not intended for use in medical, diagnostic, or life support applications, and no independent agency certifications or approvals are to be implied as covering such applications.
  • Page 10 CAUTION: TOPPLING HAZARD If the instrument is located on top of a table or bench near the edge, and the chassis is extracted, it must be supported to prevent toppling. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 11: Specifications - Performance

    MgF2 Performance specifications are measured at recorder output and are based on constant sample pressure and deviation from set flow held to within 10% or 20 cc/min., whichever is smaller. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 12: Specifications - Electrical

    19 inch rack (IEC 297-1, 1986) LASSIFICATION General Purpose EIGHT 46 lbs. (21 kg) IMENSIONS 19.0 x 8.7 x 19.2 inches (482.2 x 221 x 487 mm) W x H x D Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 13: Customer Service, Technical Assistance And Field Service

    Technical Services Department at: Rosemount Analytical Inc. Phone: 1-714-986-7600 FAX: 1-714-577-8006 OCUMENTATION The following Model 755R Oxygen Analyzer instruction materials are available. Contact Customer Service or the local representative to order. 748213 Instruction Manual (this document) 748213-P Rosemount Analytical...

  • Page 14: Compliances

    REFACE OMPLIANCES This product satisfies all obligations of all relevant standards of the EMC framework in Australia and New Zealand. N 96 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 15: Introduction

    NTRODUCTION 1.1 DESCRIPTION The Model 755R Oxygen Analyzer provides continuous readout of the oxygen content of a flowing gas sample. The determination is based on measurement of the magnetic susceptibility of the sample gas. Oxygen is strongly paramagnetic while most other common gases are weakly diamagnetic.

  • Page 16: Recorder Output Range

    1.2 RECORDER OUTPUT RANGES Seven zero-based ranges are available with the Model 755R: 0 to 1%, 0 to 2.5%, 0 to 5%, 0 to 10%, 0 to 25%, 0 to 50%, and 0 to 100%. Each range is jumper selectable.

  • Page 17: Installation

    2.1.4 L OCATION AND OUNTING Install the Model 755R only in a non-hazardous, weather-protected area. Permissible ambient temperature range is 32°F to 113°F (0°C to 45°C). Avoid mounting where ambient temperature may exceed the allowable maximum. Magnetic susceptibilities and partial pressures of gases vary with temperature. In the...

  • Page 18: Calibration Gas Requirements

    755R O ODEL XYGEN NALYZER WARNING: POSSIBLE EXPLOSION HAZARD This analyzer is of a type capable of analysis of sample gases which may be flammable. If used for analysis of such gases, internal leakage of sample could result in an explosion causing death, personal injury, or property damage. Do not use this analyzer on flammable samples.

  • Page 19: Zero Standard Gas

    Needle Model 755R Valves Oxygen Analyzer Sample In Two Micron To Vent Filter Zero Flowmeter Standard Span Standard 2-1. I 755R IGURE NTERCONNECTION OF YPICAL ANIFOLD TO ODEL 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 20: Sample Pressure Requirements: General

    Pressure surges in excess of 10 psig during admission of sample or standard gases can damage the detector. Maximum permissible operating pressure is 10 psig (68.9 kPa). To ensure against over-pressurization, insert a pressure relief valve into the sample inlet line. In addition, Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 21: Operation At Negative Gauge Pressures

    The optimum flow rate is between 200 and 300 cc/min. Deviation from the set flow should be held to within 10% or 20 cc/min, whichever is 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 22: Materials In Contact With Sample

    2.3.6 M ATERIALS IN ONTACT WITH AMPLE Within the Model 755R, the following materials are exposed to the sample: 316 stainless steel, glass, titanium, Paliney No.7, epoxy resin, Viton-A, platinum, nickel and MgF coating on mirror. 2.3.7 C ORROSIVE...

  • Page 23: Electrical Connections

    The analyzer is supplied, as ordered, for operation on 115 VAC or 230 VAC, 50/60 Hz. Ensure that the power source conforms to the requirements of the individual instrument, as noted on the name-rating plate. Electrical power is supplied to the analyzer via a customer-supplied three-conductor 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 24: Recorder Output Selection And Cable Connections

    1. Insert RECORDER OUTPUT Selector Plug (See Figure 3-1) in position appropriate to the desired output: 10 mV, 100 mV, 1V or 5V. 2. Connect leads of shielded recorder cable to “REC OUT +” and “-” terminals on the Model 755R Oxygen Analyzer June 1997 Rosemount Analytical...
  • Page 25 Analyzer Controller Remote Indicator Note: Total series resistance of all devices is not to exceed 1000 ohms. 2-4. M 755R C IGURE ODEL ONNECTED TO RIVE EVERAL URRENT CTUATED UTPUT EVICES 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 26: Output Connections And Initial Setup For Dual Alarm Option

    Alarm Relay Assembly. 2. If the alarm contacts are connected to any device that produces radio frequency interference (RFI), it should be arc suppressed. The 858728 Arc Suppressor is recommended. 2-10 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...
  • Page 27 Also, either a contact closure or a contact opening may be obtained for a de-energized relay. It is 748213-P Rosemount Analytical June 1997 2-11 Model 755R Oxygen Analyzer...
  • Page 28 99% of fullscale. Relay K2 should now be DE-ENERGIZED. The ALARM 1 and ALARM 2 Setpoint Adjustments are now properly calibrated and may be used to select the desired alarm setpoints, as described in Section 3.6. 2-12 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...
  • Page 29 Reset Alarm No. 2 Command 2. CR! AND CR2 ARE ANY 600V, 1 AMP DIODE. 1. RELAYS SHOWN IN ENERGIZED POSITION. NOTES: 2-7. A IGURE LARM ELAY SSEMBLY CHEMATIC IAGRAM 748213-P Rosemount Analytical June 1997 2-13 Model 755R Oxygen Analyzer...

  • Page 30: Remote Range Change Option

    Also, this process switches the recorder output only, and does not affect the front panel display. Remote Range Switching Truth Table J3-4 J3-3 J3-2 J3-1 Hex Range 1 Range 2 Range 3 Range 4 Note: 1 = 12 V, 0 << 1 V. 2-14 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 31: Tartup And

    Model 755R Oxygen Analyzer. 3.2 OPERATING RANGE SELECTION The Model 755R is designed to operate on a single, field-selectable range. A new range may be selected any time the analyzer application changes or any time calibration may require a range change.

  • Page 32: Calibration With Zero And Span Standard Gases

    Figure 1-1), the instrument is not set to indicate the true oxygen content of the zero and span standard gases. It is set to indicate a slightly different value, relative to background gas, calculated to provide correct readout during subsequent analysis of the sample gas. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 33: Control Board Adjustments

    ZERO control (R13) Accessible on front panel, use to establish zero-calibration point. SPAN control (R20) Accessible on front panel, use to establish span calibration point. 3-1. C IGURE ONTROL OARD DJUSTMENTS 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 34: Oxygen Equivalent Value Of Gases

    From Table 3-1, the % oxygen equivalents are CO . -0.623 and N , -0.358%. % oxygen equivalent of mixture = 0.8 x (-0.623) + 0.2 x (-0.358) = (-0.4984) + (-0.0716) = -0.570% Oxygen Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 35: Computing Adjusted Settings For Zero And Span Controls

    With N2 zero standard gas flowing, ZERO control is adjusted so digital display reads: 0[100+(-0.623-(-0.358))] - 100[-0.623-(-0.358)] 0.265% O With air flowing, SPAN control is adjusted so the digital display reads: 21[100 - 0.265) - 100 (-0.265) ≅ 21.21 = 21.209% O 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...
  • Page 36 Helium, H -0.059 Propane, C -1.135 n-Heptane, C -2.508 Propylene, C -0.903 n-Hexane, C -2.175 Water, H -0.381 cyclo-Hexane, C -1.915 Xenon, Xe -1.340 3-2. O ABLE XYGEN QUIVALENT OF OMMON ASES Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 37: Selection Of Setpoints And Deadband On Alarm Option

    The Current Output is set at the factor for 4 to 20 mA. If a 0 to 20 mA output is required, readjust both the zero and span potentiometers (R1 and R2) on the Current Output Board. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...
  • Page 38 15 20 25 30 0 to 50 Setpoint Dial Reading Percentage Oxygen Readout 20 30 90 100 0 to 100 Setpoint Dial Reading 3-2. D IGURE ETTINGS FOR LARM ETPOINT DJUSTMENTS Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 39: Operation

    Indicated % O True % O = (760/740)(40%) = 41.1% O Example: S.I. Units = 101 kPa = 98.2 kPa Indicated % O = 40% True % O = (101/98.2)(40%) = 41.1% O 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 40: Calibration Frequency

    If desired, effects of barometric pressure variation can be minimized by calibrating immediately before taking readings, for example, at the beginning of each shift. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 41: Theory

    This is analogous to the magnetization of a piece of soft iron. Diamagnetic gases are analogous to non-magnetic substances. With the Model 755R, the volume magnetic susceptibility of the flowing gas sample is sensed in the detector/magnet assembly. As shown in the functional diagram of Figure 5-1, a dumbbell-shaped, nitrogen-filled, hollow glass test body is suspended on a platinum/nickel alloy ribbon in a non-uniform magnetic field.

  • Page 42: Variables Influencing Paramagnetic Oxygen

    RESSURE FFECTS Although normally calibrated for readout in percent oxygen, the Model 755R actually responds to oxygen partial pressure. The partial pressure of the oxygen component in a gas mixture is proportional to the total pressure of the mixture. Thus readout is affected by pressure variations.

  • Page 43: Detector/Magnet Assembly

    Source Lamp ASSEMBLY CONTROL ASSEMBLY Shaded Pole Pieces (4) Zero Span % Oxygen Dual Photocell Readout BT1, BT2 5-1. F 755R P IGURE UNCTIONAL IAGRAM OF ODEL ARAMAGNETIC XYGEN EASUREMENT YSTEM 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 44: Spherical Body In Non-Uniform Magnetic Field

    (See Figure 5-3B). The thermistor provides the input signal to the detector temperature control section of the Power Supply Board assembly: HR1, mounted on the top of the magnet, and HR2, mounted permanently on the rear of the detector assembly. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...
  • Page 45 Detector Assembly C. Exploded View of Optical Bench Assembly B. Sectional Top View of Optical Bench and Detector Assemblies 5-3. D IGURE ETECTOR AGNET SSEMBLY 5.3.2 C ONTROL OARD AND SSOCIATED IRCUITRY 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...
  • Page 46 In the Analog Output Circuit, the output from U10 is provided as an input to the recorder output amplifier. This circuitry provides scale expansion, and amplification preparatory to use for potentiometric recorder, voltage-to-current conversion for current recorder, and/or alarm functions. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 47: Power Supply Board Assembly

    Control Board assembly. The circuit provides an on-off control of heater element HR3 via TRIAC element Q7. Heater HR3 is a part of the heater/fan assembly. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...
  • Page 48 An isolated current output is obtainable by insertion of an optional plug-in circuit board into receptacle J1 on the Control Board (see Figure 3-1). The current outputs available by this board are 0 to 20 mA or 4 to 20 mA. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical...

  • Page 49: Section 6. Circuit Analysis

    IRCUIT NALYSIS 6.1 CIRCUIT OPERATION The electronic circuitry of the Model 755R Oxygen Analyzer consists of the following: • A detector compartment heater circuit. • A detector heater circuit. • A ±15 VDC power supply. • A voltage regulating circuit for a stable light source.
  • Page 50 3 does not conduct, +15V is at the output terminal. With +15V at the output, the potential on the non-inverting terminals will be about ±2.3 V because of the resistance divider, R75, R76. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical...
  • Page 51 590K TO POWER SUPPLY CR11 19 VAC 21.5K 1.0uF 210K 3.3K 37.4K 2200uF CR10 4.75K .18uF 56.2 -15V 11.0K .18uF 9.07K 63.4K .01uF 169K -15V 6-2. C IGURE EATER ONTROL IRCUIT 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 52: Ramp Generator Circuit

    (comparators 1 and 2) to operate Q6 or Triac Q7 in the case heater (See Figure 6-5). Theoretically, at 135°F (57°C) the potential at the junction of RTR1 and R84 is Model 755R Oxygen Analyzer June 1997 Rosemount Analytical...
  • Page 53 R82, R83 junction and RT1, R84 junction. As the temperature approaches the desired case temperature of 135°F (57°C), differences between these two junctions will exist for only part of each ramp and the number of pulses operating Q7 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 54: Detector Heater Control Circuit

    When terminal 3 equals terminal 2, or is less than terminal 2, the output of AR6 is zero or less. Q2 and Q3 do not conduct and the heater would not be supplying heat energy to the detector. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical...

  • Page 55: Detector Light Source Control Circuit

    Q4 to conduct more current through R66. As the potential across R66 increases, Q5 will conduct more current, causing a further increase in current flow through DS1. The net result is that the voltage across DS1 will remain uniform and the operation of Q4 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 56: Detector With First Stage Amplifier

    The platinum wires form a fulcrum around which the test body pivots. The detector operates in the following fashion. If the sample gas contains oxygen, it Model 755R Oxygen Analyzer June 1997 Rosemount Analytical...
  • Page 57 The input terminal of U1 will be negative and the current through the feedback loop around U2 will cause the dumbbell and mirror to be positioned correctly in the test body. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 58: Detector With First Stage Amplifier

    -15V +15V 249K DETECTOR 3.01K .01uF -15V COARSE ZERO 3.3uF -15V .0022uF 1.77K .47uF 1000pf .47uF 1.13K 118K 1.77K CURRENT FEEDBACK LOOP 6-6. D IGURE ETECTOR WITH IRST TAGE MPLIFIER 6-10 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 59: Function

    .22uF 8052A TP16 1.0uF DIGITAL DISPLAY DISPLAY DRIVER AND 71C03 CONTROL .47uF 1.0uF TP16 +15V REGULATOR To Analog Output Circuit (Figure 6-8) 6-7. B IGURE UFFER NTICIPATION IGITAL UTPUT IRCUITS 748213-P Rosemount Analytical June 1997 6-11 Model 755R Oxygen Analyzer...

  • Page 60: First Stage Amplifier

    This is analogous to the magnetization of a piece of soft iron. Diamagnetic gases are analogous to non-magnetic substances. With the Model 755R, the volume magnetic susceptibility of the flowing gas sample is sensed in the detector/magnet assembly. As shown in the functional diagram of Figure 5-1, a dumbbell-shaped, nitrogen-filled, hollow glass test body is suspended on a platinum/nickel alloy ribbon in a non-uniform magnetic field.

  • Page 61: Simplified Analog Recorder Output Circuit

    400K R50C 800K TP18 .1uF .1uF FROM To Alarm and V/I R50A To Recorder 3.83K Recorder Output (Jumper Selectable) 100mV 90.9 10mV 6-8. S IGURE IMPLIFIED NALOG ECORDER UTPUT IRCUIT 748213-P Rosemount Analytical June 1997 6-13 Model 755R Oxygen Analyzer...
  • Page 62 IRCUIT NALYSIS OTES 6-14 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 63: Section 7. Service And Maintenance

    IGITAL DISPLAY GIVES CORRECT READING WITH STANDARD GASES BUT NOT WITH SAMPLE GAS The sample and the sample handling system are suspect. Check these areas. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 64: Control Board Checkout

    Set RANGE Select to lowest range or use zero and span gases. URRENT UTPUT Set RANGE Select to lowest range or use zero and span gases. When checkout complete, re-install Detector Isolation Plug. Configure Control Board to original setup. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 65: Heating Circuits

    Heater HR1 is attached to the magnet. Heater HR2 is attached to the rear of the detector. Combined resistance of these two parallel-connected heaters, as measured at pins 15 and 16 of the detector connector J12, should be approximately 89 ohms. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 66: Detector Check

    Connect J12 has slots at top and bottom. To remove a connector pin/lead, insert the tool into the upper or lower slot and push down on the end to release the keeper on the pin. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical...

  • Page 67: Source Lamp

    TP5 (ground). This voltage should be 2.2 V ±0.2 VDC. If reading is correct, the lamp may be burned out; also inspect the cable for continuity. If voltage reading is not 2.2 V ±0.2 VDC, the Power Supply Board must be replaced. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 68: Photocells

    Remove photocell lock screws (2), slide photocell out. Reverse the removal procedure for installation. Align photocell (see below). LIGNMENT The adjustments in this procedure are made on the Control Board. With zero gas flowing: Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 69: Lamp Replacement

    All internal adjustments are now properly set. The instrument may be calibrated per Section 3.4. DETAIL A 1/4" Set Screw Red Mark for Alignment DETAIL B Voltmeter Lead 7-4. L IGURE EPLACEMENT 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...

  • Page 70: Detector

    3. Connect the voltmeter between TP10 and circuit ground (TP7). Adjust front panel ZERO control (R13) for reading of exactly zero on voltmeter. 4. With all internal adjustments now properly set, the instrument may be calibrated per Section 3.4. Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 71: Control Board Setup

    ULLSCALE 1. Monitor TP11. Flow 100% oxygen, adjust SPAN potentiometer R20 for 10.00 V ±5mV. 2. Monitor TP16, adjust R20 for 10.00 V ±5mV. The display must read 100.00 ±5 counts. 748213-P Rosemount Analytical June 1997 Model 755R Oxygen Analyzer...
  • Page 72 .000 VDC. 2. Flow 100% oxygen for span gas. Recorder output for 1 V, 100 mV, or 10 mV should read 100% of span gas. Adjust R88 if necessary. 7-10 Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...

  • Page 73: Replacement Parts

    ARTS The following parts are recommended for routine maintenance and troubleshooting of the Model 755R Oxygen Analyzer. If the troubleshooting procedures in Section 7 do not resolve the problem, contact your local Rosemount Analytical service office. A list of Rosemount Analytical Service Centers is located in the back of this manual.
  • Page 74 654078 Viton Tubing (Sample In) 654079 Viton Tubing (Sample Out) 654080 Fan Heater 654081 Case Heater 809374 Fuse, 3/4A (Power Transformer, 115VAC) 860371 Alarm Relay 861467 Shock Mount (Package of 4) Model 755R Oxygen Analyzer June 1997 Rosemount Analytical 748213-P...
  • Page 75 8. Do not place cylinders where they may become part of an electric circuit. When electric arc welding, precautions must be taken to prevent striking an arc against the cylinder. Rosemount Analytical Inc. 4125 E • A 92807-1802 • 714-986-7600 • FAX 714-577-8006...
  • Page 76 (blank)
  • Page 77 SUCCESSOR INTEREST TO THE GOODS PROVIDED HEREUNDER. Force Majeure. Seller shall not be liable for failure to perform due to labor strikes or acts beyond Seller's direct control. Rosemount Analytical Rosemount Analytical Inc. 4125 E • A 92807-1802 • 714-986-7600 • FAX 714-577-8006...
  • Page 78 (blank)
  • Page 79 National Response Center 1-800-654-7768 NTERNATIONAL Contact your local Rosemount Sales and Service office for service support. ACTORY For order administration, replacement Parts, application assistance, on-site or factory repair, service or maintenance contract information, contact: Rosemount Analytical Inc.
  • Page 80 (blank)

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