Dwyer TDS2-10 User Manual
Bulletin TE-TDS2-10
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Waterproof Cond./TDS Testing Pen
Specifications - Installation and Operating Instructions
he Model TDS2-10 Cond./TDS Testing Pen monitors both conductivity and total
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issolved solids in streams, rivers, or any other body of water. It picks up impurities
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and dissolved solids while checking the conductivity at the same time. This pocket
sized tester is constructed of a durable ABS plastic waterproof housing and 316
SS electrodes to protect against corrosion. A large LCD display is easy to read and
shows both the conductivity/total dissolved solids and temperature measurements
imultaneously. Since change in temperature can affect accuracy, the TDS2-10
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as automatic temperature compensation. Batteries (four LR44 alkaline) included
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in packaging.
OPERATING INSTRUCTIONS
Introduction
Please read the manual completely before using this meter. Filing and keeping the
manual for future reference is recommended. It is also recommended to soak the
electrode for at least 30 minutes before using the meter to clear anything affecting
the probe.
Power Supply
The meter is powered by 4 LR44 button cell batteries. Check the batteries if it is
your first time use, if the battery symbol appears on the LCD, or if the meter cannot
power on.
To install the batteries:
1. Turn off the meter.
2. Loosen the battery cover in the counterclockwise direction (DON’T discard the
black washer!).
3. Replace the old batteries with four new button cell LR44 batteries.
4. Make sure the batteries are in place and the polarity is correct.
5. Put the battery cover back and turn it tightly in the clockwise direction.
NOTICE
instrument.
Remove the batteries from instruments that you do not plan to
use for a month or more. Do not leave batteries in the
SPECIFICATIONS
Wetted Materials: ABS plastic and 316 SS.
ange:
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onductivity: 0 to 1999 uS or 0 to 19.99 mS;
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DS: 0 to 1999 ppm or 0 to 19.99 ppt.
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Accuracy: ±1% FS.
Display: 30 mm H x 18 mm W LCD dual display.
Resolution:
Conductivity: 1uS or .01 mS;
TDS: 1 ppm or .01 ppt.
Temperature Limits: 32 to 122°F (0 to 50°C).
Power Requirements: (4) 1.5 V LR44 alkaline batteries, installed functional, user
replaceable.
Enclosure Material: ABS.
Enclosure Rating: IP65.
Weight: 4.3 oz (115 g).
Agency Approval: CE.
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
LCD Display
- The top shows the measured reading.
The bottom shows the reading of the temperature.
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Cal = Calibration mode.
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Hold = Data hold.
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- Microseconds (uS) or milliseconds (mS) is the unit of Conductivity.
- Parts per thousand (ppt) or parts per million (ppm) is the unit of TDS.
- C or F is the unit of the liquid temperature.
- is the battery low icon.
eypad
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7. Dip the probe into the sample. Make sure there are no air bubbles trapped in the
slot of the probe. To remove air bubbles, give the probe a gentle stir. Make sure the
electrode tip is submerged when you stir it.
. Stir the probe gently in the sample to create a homogeneous sample. Allow a few
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econds for it to reach temperature equilibrium (wait about 15 minutes to get a
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table reading).
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. The unit of measurement will flash on the LCD to indicate that the meter is in
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measurement mode. When the reading is stable, the unit will stop flashing.
10. Press to freeze current readings. The text “Hold” will appear on the LCD. Press
gain to release.
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1. Turn off the meter by pressing .
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2. Make sure your electrode is clean and store it carefully. Before storage, rinse it
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carefully in de-ionized water and store dry with the cap. Remember the storage
temperature limits. For more information, see the maintenance section.
13. Air bubbles can easily adhere around the gap between the electrode and the
meter; this will affect the accuracy. See the troubleshooting section for more
etails on how to remove air bubbles.
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Operation
1. Remove the probe cover from the meter to expose the electrode.
2. Press to power on the meter. The LCD will display parameters (ex: tnr, tCo, tds,
rAn) in turns and then it will enter normal display.
3. The meter is default in auto-ranging status once powered on. Auto-ranging
determines and selects a range which gives you the greatest resolution and
accuracy. Alternatively, you can manually select the ranges. For example, if
you prefer the meter to display a reading such as .50 mS instead of 500 uS, you
press for more than 2 seconds.
uto Power off (Sleep Function)
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This meter will shut off automatically after 20 minutes of inactivity. For a longer
operating time, you can disable sleep mode.
To disable the auto power off:
Before power on, press + simultaneously until an “n” appears on the screen.
Then, release the keys to return to normal mode.
NOTICE
Setup
The advanced setup mode lets you customize your meter’s preferences and defaults.
To change the parameters, you can press for more than 2 seconds. You will enter
setup mode when the meter is in measurement mode.
The disable sleep mode will be invalid after every power off.
NOTICE
- The LCD will display E02/E03 if the measured value is below or over the limit
value, please re-select the range.
4. Set the temperature coefficient to the correct value. The meter is factory set to
2.1%/°C. This will normally provide good results. See the setup section to set the
temperature coefficient if needed.
5. Select the normalization temperature. The meter is factory set to 77°F (25°C). If you
need to normalize the meter to 68°F (20°C), see the set up section for details.
6. Rinse the probe with de-ionized or distilled water before use. This will remove any
impurities adhering to the electrode. If the meter is not used for a long time, please
soak the probe for more than 30 minutes to clear up the lazy effect of the probe.
- Accuracy is a percent of the full-scale, so using your meter in
the lowest range will result in the greatest accuracy.
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