Before you Begin:
Remove electrode cap. To condition electrode,
immerse electrode in electrode storage solution,
buffer or tap water for at least 30 minutes. DO
NOT use de-ionized water.
Calibration:
Calibration should be done regularly, typically
every day that the Testr is used.
pHTestr 1:
Calibrate at one point (either pH 4, 7,
or 10).
pHTestr 2:
Calibrate at three points (pH 4, 7, 10).
1.
Press ON/OFF button to switch unit on.
2.
Dip electrode 1/2" to 1" into chosen buffer
(pH 4, 7, or 10).
3.
Press CAL button to enter Calibrate (CA)
mode. ‘CA’ flashes on the display. Then, a pH
value close to the pH buffer value will flash
repeatedly.
4.
After at least 30 seconds (about 30 flashes)
press the HOLD/CON button
to confirm cali-
bration. 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 calibra-
tion (step 4 above)
. Pressing the CAL button will
resume measuring mode but will not enter the
calibration value.
Insufficient sampling time.
If the Testr does not
have a long enough exposure to the buffer, a sta-
ble calibration point will not be reached. Wait at
least 30 seconds before pressing HOLD/CON.
Failure to rehydrate the electrode.
A dry
elecrode will give fluctuating readings while it
rehydrates in a buffer, causing errors.
pH Testing:
1.
Remove cap from the electrode and press the
ON/OFF button to switch Testr on.
2.
Dip the electrode 1/2" to 1" into the test solu-
tion. Stir once and let the reading stabilize.
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 solu-
tions, and solutions with heavy metals or pro-
teins, 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,
electrode life will be shortened.
When you need a new electrode, see “Electrode
Replacement”
at right.
Replacing the 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.
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.
Specifications
Electrode replacement:
You can replace the electrode module at the fraction of
the cost of a new Testr. When the Testr fails to cali-
brate, gives fluctuating readings in buffers, shows
error messages ‘E2’ or ‘OR’ in a buffer, and the proce-
dures 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 col-
lar over the module and thread it into place
by firmly twisting clockwise.
Warranty:
Each waterproof pHTestr 1 and 2 meter body is
warranted against defects in materials and work-
manship 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 pur-
chase. 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 prod-
ucts 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 improve-
ments in design, construction and appearance of
products without notice. Prices are subject to
change without notice.
Waterproof pHTestr 1 & 2 Instructions
Rotate collar
away from you
Ribbed Collar
WP pHTestr 1
WP 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
24 hours continuous use
(approx. 720 tests per battery set)
Dimensions
6.5"L x 1.5" dia. (165 x 38 mm dia.)
Weight
3.25 oz (90 gms)
+
-
keypad
Small O-Ring
(hidden)
Large
O-Ring
Large Tab
Small
Tab
Insert Electrode
Electrode
module
B
A
