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Summary of Contents for Edgetech PPM1
- Page 1 Model PPM1 & PPM2 Trace Moisture Analyzer OPERATORS MANUAL 19 Brigham Street ● Unit #8 ● Marlborough, MA USA 01752 Tel. [508] 263-5900 ● [800] 276-3729 ● Fax [508] 486-9348 E-mail h2o@edgetechinstruments.com ● www.edgetechinstruments.com Tel. [508] 263-5900 ● Fax [508] 486-9348 Rev.
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Page 2: Quick Startup Guide
QUICK STARTUP GUIDE STARTUP PPM1: 1. Remove the cover, and mount the PPM1 in an easily visible position. 2. See Wiring Diagram in Installation, Section 4. 3. Wire Sensor connections. 4. Wire Power connections. Do not turn on Power at this time. -
Page 3: Table Of Contents
Page 1.0 Quick Startup Guide 2.0 Commitment to Quality 3.0 Introduction 3.1 General Description 3.2 Technical Description 3.2.1 The PPM1/PPM2 System 3.2.2 The Phosphorous Pentoxide Sensor 3.2.3 Standard Factory Ranges 3.2.4 Gases to Avoid 4.0 Installation 4.1 Placement of Instrument 4.2 Mounting... - Page 4 6.0 Maintenance 6.1 General 6.1.1 Filters 6.1.2 Battery Maintenance 6.2 Gases 7.0 Specifications 8.0 Appendix 8.1 PPM1 Mounting Dimensions 8.2 Sensor Dimensions 8.3 Warranty 8.4 Notes 8.5 Basic Humidity Definitions LIST OF ILLUSTRATIONS Phosphorous Pentoxide Sensor PPM1 Wall Mounted PPM2 Portable...
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Page 5: Commitment To Quality
2.0 EDGETECH'S COMMITMENT TO QUALITY To Our Customers: Thank you for purchasing one of our products. At EdgeTech, it is our policy to provide cost-effective products and support services that meet or exceed you requirements, to deliver them on time, and to continuously look for ways to improve both. -
Page 6: Introduction
It is provided in a wall-mount configuration. See Figure 3-2. The PPM2 is a portable, battery operated version of the PPM1. It is provided in a carrying case, with two gel-cell rechargeable batteries built in. See Figure 3-3. -
Page 7: Phosphorous Pentoxide Sensor
Factory before shipment to the user to compensate for variations in the diffusion membranes. Figure 3-1 shows the moisture sensor. Figure 3-2 The PPM1 with Wall Mount housing and Moisture Sensor... -
Page 8: Standard Factory Ranges
Figure 3-3 The PPM2 Portable Trace Moisture Analyzer Figure 3-2 shows the wall mounted PPM1, and Figure 3-3 shows the portable battery-operated PPM2. 3.2.3 STANDARD FACTORY RANGES As received from the Factory, the instrument is programmed for the following standard conditions. These may be field modified by the user by using the RS- 232 serial port. -
Page 9: Gases To Avoid
4.0 INSTALLATION 4.1 PLACEMENT OF INSTRUMENT If possible, locate the PPM1 in a clean area. Choose a location where the display may be conveniently observed. Depending on the location selected, it may be convenient to wire the instrument prior to mounting. -
Page 10: Electrical Wiring
Leak check the system after installation. Purge the sampling system with dry gas after installation. Do not expose the sensor to excess pressure. Allow sufficient time for the system to dry out before attempting to take measurements. -
Page 11: Wiring Connections
Figure 4-1 PPS1/PPS2 Wiring Connections Digital Display 4 – 20 mA Output 1 RS-232 Type DB-9 4 – 20 mA Connector Output 2 Sensor Cable Connections DC Power Alarm Alarm Connections Relay K2 Relay K1... -
Page 12: Operation
5.0 OPERATION 5.1 STARTUP IT IS RECOMMENDED THAT A NEWLY INSTALLED INSTRUMENT BE DRIED DOWN WITH DRY INERT GAS SUCH AS BOTTLED NITROGEN BEFORE FINAL CONNECTION IS MADE BETWEEN THE SAMPLING SYSTEM AND THE PROCESS GAS STREAM. 5.1.1 DRY DOWN PHASE 1 THE DRY GAS SHOULD FLOW THROUGH THE SAMPLING SYSTEM ONLY (BYPASSING THE SENSOR) FOR THE FIRST FEW HOURS. -
Page 13: Measuring Dry Gases
5.3.2 THE PPM2 The PPM2 is a portable version of the PPM1. It is necessary to charge the built- in batteries before using it, and then to recharge them periodically. The charger is supplied with the system. -
Page 14: Using The Rs-232 Port For Programming
Plug a standard RS-232 cable into the DB-9 connector on the circuit board in the PPM1 or PPM2. Plug the other end into your terminal or computer. If your computer does not have a serial port, you will have to obtain a USB to Serial adaptor, install the driver for it, and use the USB port. -
Page 15: Changing The Analog Outputs
select Display parameters, press “D” for Display. (We will C)alibrate the Outputs and modify the R)s232 later.) Note that initially, the displays are showing units of ppmv (parts-per-million by volume) and Dew Point in degrees C. First, we will change ppmv to ppmw (parts-per-million by weight). - Page 16 In this example, let’s change the 4 to 20 mA Analog Output so that it corresponds to Dew Point in °F instead of Dew Point in °C. Press “C” for C)hange. You will than see this window. Press “2” to Set Output 2, which corresponds to Dew Point in °C.
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Page 17: Programming The Alarm Relays
Again you do not have to go back to the main menu, since the next step will automatically put you in this mode. The PPM1 and PPM2 have two alarms. They are Form A, (single-pole, single- throw) normally open. You can make them correspond to any of the available measured or calculated measurement parameters. - Page 18 As you cycle through, you will be given the opportunity to replace DP°C with DP°F, as shown here. At this time you can also change the measurement range if you wish to. We will leave the default °F range of 50.0 to 0.0. Next, we will program the alarm relay to open when the measurement is above 25 degrees, and close when the measurement is below 24 degrees.
- Page 19 Next, we are asked if we want to Save the Changes, and we press “Y” for Y)es. Now, we can select “X” for eX)it, and then “A” to A)ccept the changes.
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Page 20: Calibrating The Analog Outputs
Hyperterminal window with periodic updates. See the illustration below. 5.4.5 CALIBRATING THE ANALOG OUTPUTS If you have a precise milliammeter, the PPM1 and PPM2 allow you to check the calibration of the two 4 to 20 mA analog outputs. In order to utilize... -
Page 21: Modifying The Rs-232 Parameters
Next, read the low end output current. It should be about 4 mA. Type it in as shown above. The system then will show you the predicted midpoint reading, which in this case should be within the range of between 11.975 and 12.025 mA. - Page 22 “X” for eX)it, and you will be back in the default updating mode as shown below. You have now completed all the programming of the PPM1 or PPM2. You can go back at any time and easily modify any parameter in the field.
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Page 23: Maintenance
6.0 MAINTENANCE 6.1 GENERAL Very little maintenance is required for long term operation of the PPM1 and PPM2 Trace Moisture Analyzers. They have been designed for continuous operation over very long periods of time. The electronics unit needs no maintenance. The trace moisture sensor may gradually get contaminated, and may have to be returned to the Factory for cleaning after very long periods of operation. -
Page 24: Specifications
Form A (Normally Open) Contact Rating: 3A at 250VAC/30VDC Digital Display: LCD, 2 line, backlit Sensor Gas Connections: ¼ inch (6.35 mm) compression fittings Model PPM1: Power Requirements: 18 to 30 VDC unregulated, 100 mA maximum Standard Cable: 6 feet (1.8 meter) Dimensions: Enclosure (LWD): 5.1 in (13cm) X 5.1 in... - Page 25 Weight: Entire System: 4 lbs (1.8kg) Available PPM1 Options/Accessories: Right angle mounting bracket (-MB) Additional sensor cable length (-SCBL) Note: Specify length to 500 ft. max. Model PPM2: Power Requirements: Battery Powered, 2 gel cells (12 VDC) in series Battery Charger included...
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Page 26: Appendix
8.0 APPENDIX 8.1 PPM1 MOUNTING DIMENSIONS... -
Page 27: Sensor Dimensions
8.2 SENSOR DIMENSIONS... -
Page 28: Warranty
Instruments deems necessary to ascertain the cause for failure. The warranties expressed here are exclusive. There are no other warranties, either expressed or implied, beyond those set forth here, and Edgetech Instruments does not assume any other obligation or liability in connection with the sale or use of these products. -
Page 29: Notes
Notes...
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