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PMS Instrument Company

To order, call 541-704-2299 or Fax 541-704-2388 | Email

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More Resources:

  • Instruments
    • Filling the Model 610 internal Portable Tank
    • Filling the Model 615 or Model 1515D Portable Tank
    • Filling the Portable Tank
    • Preparing the Instrument for Use
    • Sealing a sample in the Compression Gland Cover
    • Setting the Rate Valve
    • What it should look like when it's all hooked up
  • Making the Measurements - Plant Moisture Stress
    • Interpreting Data
    • Making the Measurement of the Plant Sample
    • Measuring Leaf Water Potential in Wine Grapes
    • Measuring Stem Water Potential (SWP)
    • Measuring Stem Water Potential in Almond Trees
    • Measuring Stem Water Potential in Prune Trees
    • Measuring Stem Water Potential in Walnut Trees
    • PMS - Meaning and Importance
    • Stress levels, crop tables and information
    • Using a Pressure Chamber with Almond
  • Accessories to Nitrogen Gas Units
    • Installing the Almond Compression Gland Gasket and Insert
    • Installing the Grass Compression Gland
    • Pressure Regulators: Do I need one?
    • Sealing a sample using inserts, gaskets and tools
    • Using the Grass Compression Gland
    • Using the Grass Compression Gland with corn

Maintenance Topics:

  • Maintenance and Trouble Shooting Nitrogen Gas Units
    • Adjusting the "Brass" - Control Valve
    • Adjusting the "Stainless Steel" - Control Valve
    • Cleaning the O-Ring on the lid
    • Cleaning the Safety Valve
    • Digital Gauge Battery Replacement
    • Instrument Maintenance
    • Maintenance for Compression Gland Lid
    • Maintenance for the Portable Tank
    • Pump-Up Chamber is leaking
    • Testing the instruments safety features
  • Maintenance for the Pump-Up Chamber
    • Basic Maintenance of Pump-Up Chamber
    • Changing O-ring on Lid of Pump-Up Chamber
    • Changing Piston Cup on Pump-Up Chamber
    • Lubricating the piston of the Pump-Up Chamber

Instrument Manuals

  • Instrument Operating Manuals
    • Model 1515D Pressure Chamber Instructions (2013 and Older)
    • Model 610 Pressure Chamber Operating Instructions
    • Model 1505D-EXP Operating Instructions - (2013 and older)
    • Pump-Up Chamber Instructions
    • PMS Model 1515D Operating Instructions (2013 and newer)
    • PMS Model 670 Operating Instructions
    • Model 1505D-EXP Operating Instructions (2013 and Newer)
    • Model 1000 Operating Instructions
    • Model 615D Operating Instructions
    • Model 615 Operating Instructions
    • Model 600D Operating Instructions
    • Model 600 Operating Instructions - 2019
    • 1505D Pressure Chamber Instrument - Operating Instructions (2013 and Newer)

  • Maintenance and Trouble Shooting Nitrogen Gas Units
    • Adjusting the "Brass" - Control Valve

      Your instrument might be fitted with a Brass or Stainless Steel Control Valve. The procedure to make this adjustment is similar but requires a different tool. Look at the Control Valve on your instrument. If...

      Keep Reading...

    • Adjusting the "Stainless Steel" - Control Valve

      Your instrument is fitted with either a Brass or Stainless Steel Control Valve. The procedure to make this adjustment is similar but requires a different tool. Examine the lock nut underneath the control valve handle....

      Keep Reading...

    • Cleaning the O-Ring on the lid

      This tutorial demonstrates how to remove the O-Ring from the lid, clean it, lubricate it and return it to service. To watch it on video – click here! Remove the lid from the chamber. Lay flat on...

      Keep Reading...

    • Cleaning the Safety Valve

      Watch this tutorial on YouTube
    • Digital Gauge Battery Replacement

      If your instrument is fitted with a digital pressure gauge, this tutorial will demonstrate how to replace the two (2) AA batteries that supply power to the gauge. This tutorial applies to the following Instruments:...

      Keep Reading...

    • Instrument Maintenance

      Daily testing and cleaning For safe use and long instrument life, keep the instrument CLEAN The instructions for operating the instrument should be followed carefully. The safety valve, in particular, should be tested each time the instrument is...

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    • Maintenance for Compression Gland Lid

      Maintaining the Compression Gland Lid is simple. The O-ring around the Compression Gland Base should be kept clean and lubricated with petroleum jelly. Occasionally unscrew the Compression Gland Screw and take out the Compression Gland...

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    • Maintenance for the Portable Tank

      The portable tank should be inspected along with the instrument, but it requires additional attention. Because the tank is a pressure vessel, care should be taken to insure that it is not dented or dropped....

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    • Pump-Up Chamber is leaking

      (Chamber will increase pressure each stroke, but will not hold pressure) First, you need to bubble check the instrument. Prepare a mixture of water and a small amount of liquid soap in a cup and mix...

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    • Testing the instruments safety features

      Testing the safety valve Instruments with a lug-type cover have a safety valve (located at the back on the right side of the chamber body). Model 650 does not have or need this valve. ...

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  • Home
  • About Us
    • About PMS Instrument
    • History of the Scholander Pressure Chamber
    • Biography of Henry Dixon
    • Biography of John Joly
    • Biography of Per Scholander
    • History of PMS Instrument - Joe Zaerr
    • The history of the double-ended pressure chamber
  • Products
    • Pump-Up Chamber
    • Model 600
    • Model 610
    • Model 615
    • Model 615D
    • Model 670
    • Model 1000
    • Model 1505D
    • Model 1515D
    • Model 1505D-EXP
    • Instrument Operating Manuals
    • Used Instruments
    • CE Declaration
  • Resources
    • Accessories to Nitrogen Gas Units
    • Instruments
    • Maintenance and Trouble Shooting Nitrogen Gas Units
    • Making the Measurements - Plant Moisture Stress
    • Plant Stress Levels
  • Maintenance
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