Oakton TDSTestr 1, TDSTestr 2, TDSTestr 3, TDSTestr 4 Instruction Manual

Before you Begin:

Remove electrode cap. Switch unit on for 15 min­utes to stabilize the batteries. Soak electrodes for
a few minutes in alcohol to remove oils.

Calibration:

Select a calibration standard appropriate for your
waterproof TDSTestr:

TDSTestr 1: between 300 ppm and 1990 ppm
TDSTestr 2: between 3 ppt and 10.00 ppt
TDSTestr 3: between 300 µS and 1990 µS
TDSTestr 4: between 3 mS and 19.90 mS

It is best to select a standard close to the test solu­tion value, and one that has a similar chemical
make-up to the test solution.

1. Pour calibration standard into two separate

containers and tap or deionized water into a
third.

2. Rinse electrode in the deionized water, then

rinse it in first container of standard, then dip
it into the second container of standard.

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

minutes to allow
display to stabilize.

4. Using a small

screwdriver, adjust the
trimpot (located inside
the Testr ’s battery
compartment) until
the display reads the
same value as the
standard.

5. Rinse the electrode in the tap or deionized

water and proceed with testing.

TDS Testing:

1. Remove cap from electrode. Switch unit on

(ON/OFF button).

2. Dip the electrode into the test solution. Stir

once and let the reading stabilize.

3. Allow time for the Automatic Temperature

Compensation to correct the readings for solu­tion temperature changes.

4. Note the reading once the display is stable. If

the solution is above the range of the TDSTestr,
the display will show

5. Press ON/OFF to turn off Testr.

Replace cap.

Instrument Maintenance:

•

To improve performance, clean the stainless
steel electrodes by periodically rinsing them in
alcohol for 10-15 minutes.

•

Replace all 4 batteries if the display becomes
faint or disappears, or if the readings are unsta­ble or constant.

•

If drift is detected while electrodes are
continuously exposed to solution for longer
than one hour, allow electrode to fully dry off
periodically.

NOTE: Testr life is dependent on meter and elec­trode care. If the electrode is exposed to damag­ing materials, electrode life will be shortened.

When you need a new electrode, see “Electrode
Replacement” on insert in back of box.

Changing batteries

1. Open battery compartment lid (with attached

lanyard loop).

2. Remove old

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

3. Recalibrate Testr after battery change.
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:

The waterproof TDSTestr 1-4 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 time 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 TDSTestrs 1-4 Instructions

trimpot

TDSTestr 1 2 3 4

0 to 0 to 0 to 0 to

Range 1990 10.00 1990 19.90

ppm ppt µS mS

Resolution

10 0.10 10 0.10

ppm ppt µS mS
Accuracy ±2% full scale
Calibration 1-point calibration with trimpot

Calibration

300 to 3 to 300 to 3 to

Standard

1990 10.00 1990 19.90

ppm ppt µS mS
Operating

32 to 122ºF / 0 to 50ºC

Temperature
ATC

32 to 122°F / 0 to 50°C
(1.11% per °F / 2% per °C)

Four 1.5V alkaline batteries
(Eveready A76BP; supplied)

Power

100 hrs. continuous use
Alternate replacement Model
Eveready 303 silver oxide,

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

keypad

+

–

Small O-Ring
(hidden)

Rotate collar

away from you

Ribbed Collar

Large
O-Ring

Large Tab

Small
Tab

Insert Electrode

Electrode
module

B

A