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Before you begin:
If necessary, remove plastic strips between
batteries and contacts.
Remove electrode cap. To condition electrode,
immerse electrode in electrode storage solution,
buffer or tap water for at least 30 minutes before
use. DO NOT use de-ionized water.
Calibration:
Calibration should be done regularly, typically
every day that the Testr is used.
pHTestr 1: you can calibrate at up to one point
(pH 4, 7, or 10).
pHTestr 2: you can calibrate at up to three points
(pH 4, 7,and 10).
1. Switch unit on (ON/OFF button).
2. Dip electrode into chosen buffer (pH 4, 7, or
10). DO NOT immerse above color band!
3. Press CAL button to enter Calibrate mode.
‘CA’ flashes on the display. Then, a pH value
close to the buffer value will flash.
4. After at least 30 seconds (about 30 flashes)
press the HOLD/CON button to confirm calibration. The display will show ‘CO’ and then
switch to the buffer value reading.
5. Repeat with other buffers if necessary.
(pHTestr 2 only). Rinse electrode in tap water
before dipping into next buffer.
Calibration Troubleshooting:
Failure to press HOLD/CON to confirm calibration (step 4 above). Pressing the CAL button will
resume measuring mode but will not enter the
calibration value.
Insufficient sampling time. The testr needs at
least 30 seconds sampling time to reach a stable
calibration point. Wait at least 30 seconds before
pressing HOLD/CON.
Failure to re-hydrate the electrode. A dry electrode will give fluctuating readings, causing
errors.
pH 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.
Caution: Never immerse the electrode above
color band! This will damage instrument
electronics!
3. Note the pH or press HOLD/ CON button to
freeze the reading. Press HOLD/CON
again to release the reading.
4. Press ON/OFF to turn off Testr. If you do not
press a button for 8.5 minutes the Testr will
automatically shut off to conserve batteries.
Instrument Maintenance:
•
Rinse the electrode with tap water or electrode
storage solution after each measurement.
•
In aggressive chemicals, dirty or viscous solutions, and solutions with heavy metals or proteins, take readings quickly and rinse electrode
immediately afterward.
•
Periodic soaks in warm pH 4 buffer will help
remove contaminants.
•
If possible, keep a small piece of paper or
sponge in the electrode cap—moistened with
clean water or electrode storage solution (NOT
de-ionized water)—and close the cap over the
electrode.
NOTE: Testr life is dependent on meter and
electrode care. If the electrode is exposed to
materials that contaminate the reference junction,
testr life will be shortened.
Replacing batteries:
1. Flip up battery
compartment lid.
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.
Error Messages:
ER1 Weak batteries—replace
ER2 Wrong or bad buffer value, or electrode is
failing.
OR Over range signal, or electrode is not in
contact with solution, or electrode is failing.
pHTestr 1-2 Instructions
Warranty:
The pHTestr 1-2 are warranted against defects in
materials and workmanship 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.
Specifications
pHTestr 1 pHTestr 2
Range –1.0 to 15.0 pH
Resolution 0.1 pH
Accuracy ±0.2 pH ±0.1 pH
Calibration
1 point (pH 4.0; 3 points (pH 4.0;
7.0; or 10.0) 7.0 and 10.0)
ATC No Yes
Operating
0 to 50°C (32 to 122°F)
Temperature
ON/OFF; HOLD; CA (Calibrate);
Functions
CO (Confirm display); auto buffer
recognition; auto-shutoff after
8.5 min. of nonuse
Three 1.5 V batteries (included).
Power 40 hours continuous use
(approx. 1200 tests per battery set)
Dimensions 5.9" x 1.7" x 1" (151 x 42 x 24 mm)
Weight 3.25 oz (90 gms)
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