Oakton Testr TDS Hi, Testr TDS Low, Testr EC Hi, Testr EC Low Instruction Manual

Before you Begin

Remove electrode cap. Soak electrodes for a few
minutes in alcohol to remove oils.

Calibration

Tester is factory calibrated. However, to ensure
accuracy, calibrate on a regular basis.

Select a calibration standard appropriate for
your Testr:

TDSTestr Low: from 200 to 1990 ppm
TDSTestr High: from 2.00 to 10.00 ppt
ECTestr Low: from 200 to 1990 µS
ECTestr High: from 1.00 to 19.90 mS

It is best to select a standard close to the test solu­tion value.

1. Open battery compartment

lid (end with lanyard loop).
The two white buttons are
Increment (INC) and
Decrement (DEC)
calibration keys.

2. Rinse electrode in

deionized water, then
rinse it in calibration standard,
then dip it into a container of calibration
standard.

3. Switch unit on (ON/OFF key). Wait several

minutes for display to stabilize.

4. Press the INC or DEC keys to adjust reading to

match the calibration standard value.

5.After 3 seconds without a key press, the

display flashes 3 times, then shows “ENT”.
The tester accepts calibration value; returns to
measurement mode.

6. Replace battery cap.
TDS or Conductivity Testing

1.

Remove electrode cap. Switch unit on
(ON/OFF key).

2. Dip electrode into test solution. Make sure

sensor is fully covered.

3. Wait for reading to stabilize (Automatic

Temperature Compensation corrects for
temperature changes). Note reading.

4. Press ON/OFF to turn off Tester. Replace

electrode cap. Note: Tester automatically shuts
off after 8.5 minutes of nonuse.

HOLD function

Press HOLD key to freeze display. Press HOLD
again to release.

Setting TDS Factor (TDSTestrs only)

The TDSTestrs let you select a TDS factor of

0.4 to 1.0.

1. Open battery compartment. With meter on,

press the HOLD key, then press the INCkey
(INC key is inside battery compartment; see
diagram at left).

2. Press the INC or DEC keys to adjust the TDS

factor.

3. After 3 seconds without a key press, the dis-

play flashes 3 times, then shows “ENT”. Tester
accepts TDS factor and returns to measure­ment mode.

4. Replace battery cap.

Changing Batteries

1. Open battery compartment lid (end with

lanyard loop).

2. Remove old batteries;

replace with fresh ones.
Note polarity (shown in
battery compartment
and in picture at right).

3. Recalibrate after battery

change.

Tester Maintenance

•

To improve performance, clean the electrodes
by rinsing them in alcohol for 10-15 minutes.
Remove white plastic cup insert to clean vis­cous solutions.

•

Replace all batteries if low battery indicator
appears, or if readings are faint or unstable.

•

If you experience drift, periodically let elec­trode fully dry.

When you need a new electrode, see “Electrode
Replacement” at right.

Specifications

Electrode replacement:

You can replace the electrode module at the fraction
of the cost of a new Testr. When the Testr fails to
calibrate, gives fluctuating readings in buffers,
shows error messages ‘E2’ or ‘OR’in a buffer, and
the procedures in the Maintenance section do not
help, you need to change the electrode.

1. With dry hands, grip the ribbed Testr collar

with electrode facing you. Twist the collar
counter clockwise. (see diagram A). Save the
ribbed Testr collar and O-ring for later use.

2. Pull the old electrode module away from the

Testr.

3. Align the four tabs on the new module so

they match the four slots on the testr. (see
diagram B).

4. Gently push the module onto the slots to seat

it in position. Push the smaller O-ring fully
onto the new electrode module. Push the col­lar over the module and thread it into place
by firmly twisting clockwise.

Warranty:

Each TDSTestr and ECTestr meter body is war­ranted against defects in materials and work­manship for a period of 12 months from the date
of purchase; the electrode module is warrantied
for a period of 6 months from the date of pur­chase. If repair, adjustment or replacement is
necessary and has not been the result of abuse or
misuse within the 6 month period, please return
the Testr—freight pre-paid—and correction will
be made without charge. Out of warranty prod­ucts will be repaired on a charge basis.

Return of Items:

Authorization must be obtained from your
OAKTON Distributor before returning items for
any reason. When applying for authorization,
please include information regarding the reason
the item(s) are to be returned.

Note: We reserve the right to make improve­ments in design, construction and appearance of
products without notice. Prices are subject to
change without notice.

Waterproof TDSTestr and ECTestr Series Instructions

Rotate collar

away from you

Ribbed Collar

Testr TDS Low TDS Hi EC Low EC Hi

0 to 0 to 0 to 0 to

Range 1990 10.00 1990 19.90

ppm ppt µS mS
Resolution 10 ppm 0.10 ppt 10 µS 0.10 mS
Accuracy ±1% full scale

TDS Factor

0.4 to 1.0

—

selectable

Calibration 200 to 2.00 to 200 to 1.00 to
Standard 1990 10.00 1990 19.90
Range ppm ppt µS mS

Calibration

1 point (calibration range is ±30%

of factory default parameter)
ATC 0 to 50°C (2% per °C)
Operating

0 to 50ºC
Temp.

Four 1.5V alkaline batteries

(Eveready A76BP; supplied)
Power 150 hrs. continuous use

Alternate replacement Model

Eveready 303 silver oxide,

70 hrs. continuous use.
Dimensions 6.5"L x 1.5" dia. (165 x 38mm)
Weight 3.25 oz (90 gms)

INC

DEC

Small O-Ring
(hidden)

Large
O-Ring

Large Tab

Small
Tab

Insert Electrode

Electrode
module

B

A

keypad

+

–