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Series 240/241 Instruction Manual Table of Contents Sierra Series 900 Single & Dual Channel System Instruction Manual Part Number IM- 90- 1 0 7 /0 5 Revision D.1 5 Harris Court, Building L Monterey, CA 93940 (831) 373-0200 (800) 866-0200 Fax (831) 373-4402 ht tp :/ / www.
Series 900 Single & Dual Instruction Manual Page 16 © COPYRIGHT SIERRA INSTRUMENTS 1994 No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval s.
Series 900 Single & Dual Instruction Manual Page 15 1 . Introduction ............................................................................. 1 2. Locating System Electronics .................................................. 2 3. Front Panel Functions .
Series 900 Single & Dual Instruction Manual Page 1 The Sierra Instruments, Inc. Single and Dual Channel System Electronics is a highly integrated systems solution to flow mea- surement and control. One or two independent flow meters or controllers can be operated simultaneously.
Series 900 Single & Dual Instruction Manual Page 2 The System Electronics should be located in a room-temperature location which is dry and dust-free. Use cable lengths in accor- dance with the guidelines given with your transducer. Excessive cable lengths will impair operation of both the System Electronics and the transducer.
Series 900 Single & Dual Instruction Manual Page 3 System Electronics’s front panel controls provide ease of opera- tion. To get the most benefit from a Sierra Instruments, Inc. System Electronics, read these instructions before attempting operation.
Series 900 Single & Dual Instruction Manual Page 4 As the potentiometer is rotated the appropriate alarm setpoint is varied from zero to the full scale flow value and displayed in the front LCD display. The totalize option records the total mass flow.
Series 900 Single & Dual Instruction Manual Page 5 The AC power line connector (or power entry module) is located on the back panel. A cordset is supplied with the System Electronics and is compatible with wall outlets in the USA.
Series 900 Single & Dual Instruction Manual Page 6 The VALVE PURGE function is activated by the VALVE TP (test point) pin. When this pin is connected to common, the valve is fully open regardless of setpoint. This pin must source 150 mA of current when driven to common.
Series 900 Single & Dual Instruction Manual Page 7 Normally each System Electronics is carefully set-up at Sierra Instruments and needs no maintenance. Individual transducers may need periodic maintenance. Refer to transducer manuals for the proper procedure.
Series 900 Single & Dual Instruction Manual Page 8 GENERAL System Electronics Powers/Reads up to two transducers. Flow, Setpoint, High Alarm, and Low Alarm directly displayed in engineering units. (Linear models). Outputs 0-5 volts and 4-20 mA for each channel.
Series 900 Single & Dual Instruction Manual Page 9 APPENDIX B Back Panel Connector Pin Assignments; 20-Pin Transducer Connector KEY ▼ (View of connector from back of enclosure) PIN NO.
Series 900 Single & Dual Instruction Manual Page 10 KEY ▼ APPENDIX C Back Panel Connector Pin Assignments; 26-Pin I/O Connector (View of connector from back of enclosure) PIN NO.
Series 900 Single & Dual Instruction Manual Page 11 The alarms are a normally, open collector transistor outputs; that is, a transistor is used as a switch to ground. A “High” alarm means that if the flow signal is higher than the alarm trip setting, the transistor will be turned on.
Series 900 Single & Dual Instruction Manual Page 12 APPENDIX E Wiring Guide.
Ra ti o C o n t ro l O p ti o n Appendix F T he con st ant ra t io -c ont r ol op t ion (“- RC” in th e m od el co de ), pr ov i de s th e use r wi t h t he ab i lit y to set an d m ai nt ai n an exa ct rat i o of ga s f lo w be t we en t wo (or mo re ) m ass fl ow con tr ol l er s (M F Cs) .
d. T urn of f t h e po we r swi t ch on th e f ro nt o f th e box, att a ch the cab l es and t he co ntr ol l er s (i f yo u h av en ’t alr ea dy do ne so ), an d t ur n t h e po we r o n. e. A pp l y gas pr es sur e to t he in let of t he con t ro l ler s per th e op er at i ng pre ss ur e li st e d on th e l ab el s.
An important point after buying a device Sierra Not available (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Sierra Not available yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Sierra Not available - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Sierra Not available you will learn all the available features of the product, as well as information on its operation. The information that you get Sierra Not available will certainly help you make a decision on the purchase.
If you already are a holder of Sierra Not available, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Sierra Not available.
However, one of the most important roles played by the user manual is to help in solving problems with Sierra Not available. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Sierra Not available along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
