EIJKELKAMP QUICK DRAW 2900F1 Operating Instructions Manual
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EIJKELKAMP QUICK DRAW 2900F1 Operating Instructions Manual

Soilmoisture probe
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OPERATING
INSTRUCTIONS
14.04.05
Model 2900F1 "QUICK DRAW" SOILMOISTURE PROBE
December 2009
(Figure 1) - 14.04.05 Soilmoisture "Quick Draw" Probe
The 14.04.05 QuickDraw Soilmoisture Probe is the most effective portable moisture measuring
instrument available. Designed for rugged field use, the patented construction utilizing capil-
lary tube connections and a super porous ceramic tip assures fast response and accurate
readings, independent of temperature differences. The self-servicing feature, unique in tensi-
ometer construction, eliminates the need for accessory service kits, and assures fast response
times after years of use.
The Probe is shipped in a dry condition for greater convenience in handling and storage over a
period of time. Follow the simple instructions to water fill your unit in preparation for use.
P.O. Box 4, 6987 ZG Giesbeek
Nijverheidsstraat 30,
6987 EM Giesbeek,
The Netherlands
T +31 313 880200
F +31 313 880299
M1.14.04.05.E
E info@eijkelkamp.com
I
http://www.eijkelkamp.com

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Summary of Contents for EIJKELKAMP QUICK DRAW 2900F1

  • Page 1 Follow the simple instructions to water fill your unit in preparation for use. P.O. Box 4, 6987 ZG Giesbeek Nijverheidsstraat 30, 6987 EM Giesbeek, The Netherlands T +31 313 880200 F +31 313 880299 M1.14.04.05.E E info@eijkelkamp.com http://www.eijkelkamp.com...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Table of Contents....................Page 2 Unpacking......................Page 3 Cautions & Warnings...................Page 3 Warranty & Liability................,,,.....Page 3 Aquaint Yourself With The Parts................Page 4 Theory of Operation....................Page 5 Venting and Adjusting Dial Gauge...............Page 6 Requirements Prior to Use / Initial Filling............Page 7 Installation......................Page 11 Making a Soil Moisture Measurement.............Page 11 Dial Gauge Pressure Build-up..............Page 14...

  • Page 3: Unpacking

    Please see page for care and user tips. WARRANTY & LIABILITY Eijkelkamp Agrisearch Equipment (EAE) warrants all products manufactured by EAE to be free from defects in materials and workmanship under normal use and service for twelve (12) months from the date of invoice provided the section below has been met.

  • Page 4: Aquaint Yourself With The Parts

    AQUAINT YOURSELF WITH THE PARTS CARRYING CASE PROBE CORING TOOL CLEANING ROD NULL KNOB DIAL GAUGE POROUS CERAMIC SENSING TIP (Figure 2) - 2900K1 Parts The Probe, Coring Tool, and Cleaning Rod are held in place by the molded plas- CORING PROBE tic retainers at the top of the Carrying Case.

  • Page 5: Theory Of Operation

    THEORY OF OPERATION The 14.04.05 Soilmoisture Probe is a tensiometer-type instrument that reads soil suction directly. The “soil suction” reading is a direct measure of the availability of moisture for plant growth, and the standard unit of measurement is the “bar”. The bar* is a unit of pressure in the metric system and is used to define positive pressure (above atmospheric pressure), or negative pressure or vacuum (below atmospheric pressure).

  • Page 6: Venting And Adjusting Dial Gauge

    Venting and Adjusting the Dial Gauge The 2060FG dial gauge is hermetically sealed at the factory at sea level. If you live at a higher elevation, the pointer on the dial gauge may read higher than zero when you unpack it. This is due to the lower atmospheric pressure at your elevation.

  • Page 7: Requirements Prior To Use / Initial Filling

    REQUIREMENTS PRIOR TO USE / INITIAL FILLING STEP 1 Turn Null Knob clockwise as far as it will go and then insert the porous ceramic sensing tip in water. (Figure 6) STEP 2 RED RING Keep the sensing tip in water. Turn the Null Knob coun- terclockwise until you just see the red ring.
  • Page 8 REQUIREMENTS PRIOR TO USE / INITIAL FILLING (cont.) STEP 4 Fill the handle with water. A teaspoon works well for this operation. Water should be poured into the handle slowly and carefully so that air bubbles are not trapped. If you see a bubble clinging to the smooth wall or bottom of the handle cavity, nudge it free with the sharp end of a pencil.
  • Page 9 REQUIREMENTS PRIOR TO USE / INITIAL FILLING (cont.) STEP 7 Remove the tip from the water and dry it with Kleenex or simi- lar absorbent tissue. The dial pointer will rise to a reading of 20 or 30 as moisture is pulled into the dry tissue. (Figure 12) STEP 8 Turn the Null Knob counterclockwise until you just see the...
  • Page 10 REQUIREMENTS PRIOR TO USE / INITIAL FILLING (cont.) STEP 10 Repeat Step 3, removing the Null Knob again while the sensing tip is in the water. Repeat Steps 4, 5, and 6, again refilling the handle with water. Insert the Null Knob and turn it clockwise as far as it will go. STEP 11 Check Response Time.

  • Page 11: Installation

    INSTALLATION / MAKING A SOIL MOISTURE MEASUREMENT STEP 1 - CORING A HOLE The first operation in taking a reading is to core a hole to accept the Probe using the Coring Tool. The Coring Tool is pushed vertically into the soil (Fig. 16). After reaching the depth desired, the Coring Tool is removed.
  • Page 12 MAKING A SOIL MOISTURE MEASUREMENT (cont.) STEP 2 - INSERTING THE PROBE Prior to removing the Probe from the Carrying Case, “TAPERED” HOLE CORING TOOL MADE IN SOIL PUSHED INTO SOIL turn the Null Knob clockwise as far as it will go and then undo the knob (counterclockwise) approximately 1/2 turn.
  • Page 13 MAKING A SOIL MOISTURE MEASUREMENT (cont.) Turn the Null Knob counterclockwise to bring the pointer up to a value, which is one and one-half times the initial reading after the one-minute period. In other words, if the reading after one minute is 20 centibars, turn the Probe so the reading is adjusted to 30 centibars.

  • Page 14: Dial Gauge Pressure Build-Up

    MAKING A SOIL MOISTURE MEASUREMENT (cont.) It has been our experience that accurate, reliable moisture readings can be made within a few minutes at any one given location. In general, the readings can be made more quickly when soil suction levels are in the low range than when they are in the high range.

  • Page 15: Irrigation Schedualing

    GAUGE READINGS / IRRIGATION SCHEDUALING 20-40 CENTIBARS: ZERO: Available moisture and aeration good A gauge reading of zero means the SOILMOISTURE SOILMOISTURE for plant growth. surrounding soil is completely saturated HEAVY CLAY SOILS: No irrigation with water, regardless of the type of soil. required.

  • Page 16: Routine Measurements

    ROUTINE MEASUREMENTS The QuickDraw can be used for different types of measurements; for spot checks and measures from a permanent location: a) Use for spot checks to determine the wetting area from drippers or to determine if there is enough moisture for germination in the seed-bed.

  • Page 17: Troubleshooting

    TROUBLESHOOTING Substantial change in The successful operation of the 14.04.05 Soilmoisture Probe is due to its struc- the vacuum level tural rigidity and the fact that the air has been almost completely removed from the water and the internal structure of the Probe. For these reasons, any small amount of movement of water through the porous ceramic sensing tip will result in a substantial change of the vacuum level within the Probe.

  • Page 18: Replacing The Ceramic Tip

    Replacing the Porous Ceramic Sensing Tip If the porous ceramic sensing tip has been broken or cracked during use or if the pores of the ceramic have become clogged resulting in too long Probe response time, it can be readily replaced with a new one. The “O” ring seals must also be replaced when you replace the ceramic sensing tip,.
  • Page 19 tip on the Probe, make sure that the sensing tip is not scratched or chipped. The Porous Ceramic Sensing Tip is supplied with a tapered configuration. The taper matches the taper of the Coring Tool. The taper assures better contact with the soil, which increases sensitivity and speed of response.

  • Page 20: Replacing The Dial Gauge

    Replacing The Dial Gauge If the dial gauge has been mechanically damaged making it inoperative, it may be replaced in the field. First remove the socket head set screw from the handle, as shown in Fig. 30. This is an “Allen” head set screw that accepts a 3/32”...
  • Page 21 Fig. 33 shows an “exploded” view of the various parts. The internal connecting tube has 3 “O” ring seals at each end and in the middle. Check to ensure that there are no cracks. Push the internal connecting tube all the way into the recess in the handle of the Probe, as shown in Fig.

  • Page 22: Time Required To Make A Reading

    TIME REQUIRED TO MAKE A READING The time that it takes to make a soil suction reading varies with soil types and amount of moisture. In order to make a soil suction reading, a small amount of water must be transferred between the soil and the sensing tip of the Probe.

  • Page 23: Tips For Scheduling Irrigations

    TIPS FOR SCHEDULING Tips for Scheduling Irrigations based upon managed, allowed depletion for 12 soil textural classifications: IRRIGATIONS The table on the next page (Fig. 36), has been developed from data presented by Waterright at the Center for Irrigation Technology, Fresno State University. Each soil textural classification affects the way water is held and released to the crop.
  • Page 24 (Figure 36)

  • Page 25: Care And Maintenance

    Care and Maintenance The QuickDraw is a little more difficult to service the first time. For this reason, we recommend that the unit be kept serviced well at all times. The soil environment is hard on farm tools. Keep the QuickDraw clean between uses. Use a small wash bottle or even a drinking water bottle works very well.
  • Page 26 Potted Plants The 14.04.05 Soilmoisture Probe is particularly valuable in determining moisture conditions in potted plants such as those in commercial buildings or nurseries. The Probe responds quickly in planting mixes used in potted plants and usually can be pushed directly down into the root zone without coring a hole. Its portability eliminates vandalism, which is not true of fixed moisture measuring instruments.

  • Page 27: Parts List

    ITEM PART # DESCRIPTION Z2901-001 PROBE CAP M802X008PKG05 “O” RING SEAL Z2901-002K1 REPLACEMENT SENSING TIP VACUUM DIAL GAUGE 2060FG5CR Z2901F-300 GAUGE CAPILLARY ASSY. M805X003PKG05 “O” RING SEAL (2 REQ’D) 14 M802X003-1PKG05 PRESSURE RELIEF “O” RING Q1032CAE03PK41 SET SCREW, 10-32 x 3/16” M802X003PKG05 “O”...

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