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Summary of Contents for Ohio Lumex RA-915+
- Page 2 RA-915+ MERCURY ANALYZER All rights reserved. No part of this publication may be reprinted, recorded or transferred in any form or by any means, including electronic, mechanical, photographic, recording, or other, without prior written permission from OhioLumex Co., Inc. Neither OhioLumex Co. Inc., nor its branches shall be liable to the buyer of this product for damages or losses, which the buyer might suffer as a result of force- majeure circumstances, abuse of the product, alteration or modification of its design, which are not provided in the operation and service manuals issued by...
- Page 3 About this manual This manual is designed to familiarize you with the principle of operation and structure of the RA-915+ analyzer (hereinafter referred to as the «analyzer»), its design, performance characteristics and operating conditions. It contains information that will provide proper operation and comprehensive utilization of the analyzer’s capabilities.
- Page 4 Safety guidelines Important safety precautions Read these rules completely before starting operation with analyzer. • Carefully study all the sections of this operation manual, analyzer de- sign and control functions. • To avoid electrical shock, never work with the analyzer covers taken off. •...
- Page 5 • Observe the following rules during any transportation of the device, as well as when performing measurements from a moving vehicle (car, heli- copter, etc.): • To avoid strong vibration effects, do not place the device on a hard surface (baggage compartment, floor of a vehicle, etc.). •...
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Page 6: Table Of Contents
User`s manual RA-915+ Contents Introduction ....................... 2 Application ......................4 Design and operation of the analyzer .............. 6 Physical foundation and principle of operation ........6 Design of analyzer ................. 7 Appearance and functional controls ..............8 Front panel view ..................8 Back panel view ................... -
Page 7: Introduction
User`s manual RA-915+ Introduction Our compliments on the acquisition of the RA-915+ mercury analyzer. The advanced technologies implemented in the analyzer's production ensure their extraordinary reliability. The RA-915+ mercury analyzer provides high se- lectivity of analysis, wide dynamic measurement range, ultra-low mercury de- tection limits for water and air and, in most cases, enables determination of mercury content in samples with a complex composition without preliminary sample preparation. - Page 8 User`s manual RA-915+ After taking the device out of the package, make sure that you have everything necessary for its operation. The complete delivery set includes the following items: 1 Base unit 1 pc. 2 Display and control unit 1 pc. 3 Power supply unit (for operation from an a.c.
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Page 9: Application
User`s manual RA-915+ Application The RA-915+ analyzer (base unit) is intended for measuring mercury vapor concentration in ambient air and in the air of residential quarters and production areas, as well as in natural gas and in factory smokestack emis- sions. - Page 10 User`s manual RA-915+ Detection limit for mercury vapor concentration in air (ng/m ), with the use of: Multi-path cell Single-path cell * Maximum mercury vapor concentration under analysis (ng/m3), with the use of: Multi-path cell 20 000 Single-path cell * 200 000 (*) in the “High concentration”...
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Page 11: Design And Operation Of The Analyzer
User`s manual RA-915+ Design and operation of the analyzer Physical foundation and principle of operation The RA-915+ analyzer operation is based on differential Zeeman atomic absorption spectrometry using high frequency modulation of light polarization ( ZAAS-HFM ). π σ σ Mercury lamp Zeeman mercury triplet... -
Page 12: Design Of Analyzer
User`s manual RA-915+ sorption by interfering components does not affect analyzer’s readings. A multi- path cell with an effective length about 10 m is used to enhance the sensitivity of analysis. Design of analyzer Block diagram of the analyzer: 1) mercury EDL lamp 2) high-frequency generator 3) polarization modulator 4) modulator control unit... -
Page 13: Appearance And Functional Controls
User`s manual RA-915+ Mercury EDL lamp (1), which is placed in the gap between the poles of a magnet, is excited by high frequency generator (2). The light successively passes through polarization modulator (3), which is controlled by unit (4), multi-path cell (5), single-path cell (13) and is detected by photodetector (6). - Page 14 User`s manual RA-915+ Inlet 1 The analyzer takes air into a multi-path cell with a built-in dust filter. Inlet 1 (with the dust filter) is used for determination of the mercury vapor content in the air (or gas) Inlet 2 This inlet is intended for the air intake into the multi-path cell through the built-in absorption filter.
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Page 15: Back Panel View
User`s manual RA-915+ Back panel view Auxilary compartment Optical bridge switch Retainer Optical bridge switch It is used for changing the position of the optical bridge. Light passes through different analytical cells when the switch is set in different posi- tions: Position I - through an external cell (pyrolysis). -
Page 16: Right Panel View
User`s manual RA-915+ Retainer The retention screw is intended for mounting the optical unit of the RP- 91C pyrolytic attachment. Right panel view Opening for a pyrolytic attachment Opening for a pyrolytic attachment It is used for mounting an optical unit during operation with the RP-91C attachment. -
Page 17: Upper Panel View
User`s manual RA-915+ TEST handle The TEST handle is intended for placing a test cell in the optical path to check the serviceability of the device: ON position - the test cell is placed into the light beam. OFF position - the test cell is removed from the light beam. Upper panel view Connector Connector... - Page 18 User`s manual RA-915+ Fig. B To operate with a stand-alone PC, it is necessary to connect the analyzer to the PC by the RS-232 cable, which is included into the basic package*. To connect the analyzer, do the following: • Disconnect the analyzer from the a.c.
- Page 19 User`s manual RA-915+ Fig. C Select power supply mode of the analyzer. If the built-in battery is cho- sen as a power supply, you can directly proceed to the preparation for measurements, because the analyzer is supplied with a fully charged battery.
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Page 20: Operation With The Display Unit
User`s manual RA-915+ Operation with the display unit Upon switching on the analyzer, the manufacturer's trademark will ap- pear on the screen of the display and control unit. Press the Ent button on the display and control unit. The MAIN MENU will be displayed and the sign * (asterisk) will appear in the upper left corner. - Page 21 User`s manual RA-915+ If you want to change the language, select the SELECT LANGUAGE command and press the Ent button. The Select language window will appear. Select the language and press the Ent button. The language is installed. The Setup window will appear on the display. Select the PARAMETERS command if you want to change the meas- urement parameters.
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Page 22: Test
User`s manual RA-915+ PROTOCOL mode; in the ON TIME mode the device is ready for inte- gration (the READY message appears). Range: 1 - 255 ng/m default value is 20 ng/m High limit (ng/m ). The high limit is the value of the mercury vapor con- centration in an analytical cell above which the ALARM warning appears in the ON STREAM mode;... - Page 23 User`s manual RA-915+ The zero signal will be measured with the compressor on during the time you have preset (bas. corr. time in the Parameters window). The ENTER THE TEST CELL message will be displayed. Set the TEST handle of the test cell on the left panel of the unit into the ON position (after rotating it back and forth several times) and press the Ent button.
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Page 24: On Stream
User`s manual RA-915+ ON STREAM The ON STREAM command is used for measuring the mercury vapor concen- tration in the air. Set the TEST handle to the OFF position. Set suitable parameters using the PARAMETERS command in accord- ance with the type of analysis. Select the ON STREAM mode from the MAIN MENU and press the Ent button. - Page 25 User`s manual RA-915+ The compressor is switched on when the up arrow button is pressed at the display unit. The compressor is switched off when the down arrow button is pressed at the display unit. Switching off the compressor during pauses in operation extends battery life. Measurement units.
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Page 26: On-Time
User`s manual RA-915+ Frame time. It is the countdown of the accumulation time in seconds (frame time, the PARAMETERS command). Name of the measurement mode. SM – On stream mode. Measurement units. The mercury vapor concentration is measured in terms of ng/m Mean values. - Page 27 User`s manual RA-915+ Prepare the RP-91 (RP-91C) attachment for operation according to the appropriate operation manual. Set the optical bridge handle to position I for operation with an RP-91C attachment. If an RP-91 attachment is used, set the switch to position II or III for operation with the single-path or multi-pass cell, respectively.
- Page 28 User`s manual RA-915+ Name of the measurement Current value mode Background level Maximum value Integration time Integral value Current value (S). It is the mercury vapor concentration in the analyti- cal cell at the current moment (it is displayed at a repetition rate of 1 Hz. Background level (S ).
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Page 29: High Concentrations
User`s manual RA-915+ To enhance the measurement accuracy, we recommend stopping the integration process by pressing the back arrow buton when the READY message recurs. Press the Ent button. The analyzer will switch over to the INTEGRATION STANDBY PHASE mode. 10. -
Page 30: Serviceability Check-Up
User`s manual RA-915+ Serviceability check-up Set the TEST handle of the test cell to the OFF position. Select the Test mode button in the Air analysis window. Two black lines will appear on the graph and the current readings will be displayed. -
Page 31: Charging The Battery
User`s manual RA-915+ Charging the battery The battery is charged when the analyzer is connected with the transformer. If it is only necessary to charge the battery without making measurements, we recommend not switching on the power button of the analyzer. It takes 5 hours to charge a dead battery. -
Page 32: Changing The Pre-Filter
User`s manual RA-915+ Changing the Pre-filter See separate instruction manual provided with the unit. Preventive maintenance During preventive maintenance check the housing covers and, if necessary, change the dust and absorption filters. Handle the multi-path cell carefully! Prevent ingress of foreign substances into the cell, metal mercury in particular. -
Page 33: Troubleshooting
User`s manual RA-915+ Appendix 1 Troubleshooting The RA-915+ analyzer should be repaired only at an authorized service center or by the manufacturer. Prior to returning the unit for repair, check the troubleshooting table given below. Fault symptom Possible cause Remedial measure Segments of the - Power cable is out of - Repair the power cable... -
Page 34: Values Of The Test Number Sk As A Function Of The Temperature Of The Test Cell
User`s manual RA-915+ Appendix 2 Values of the test number Sk as a function of the temperature of the test cell (step 1 1650 1791 1943 2109 2291 2485 2698 2929 3180 3451 3750 4060 4410 4790 1008 5200 1095 5640 1188 6130... - Page 35 User`s manual RA-915+ OhioLumex Co. Inc. tel.: +1 (888) 876-2611 fax: +1 (330) 450-0847 e-mail: mail@ohiolumex.com http://www.ohiolumex.com...
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