IP rating: IP67 (waterproof), oats on water when sensor cap
is on
Dimensions (L x W x H): 7" x 1.5" x 1.25" (17.8 x 4 x 3.1 cm)
Weight: 3.8 oz (107 g)
Ordering Information
Battery Installation
The tester uses four AAA batteries. Please install batteries
according to the following steps. Note the correct direction
of battery installation: the positive side (+) of every single
battery must face up. Incorrect installation of batteries will
cause damage to the tester and create a potential hazard.
1. Pull the battery cap up.
2. Slide the battery cap along the direction of arrow.
3. Open the battery cap.
4. Insert the batteries (ALL POSITIVE SIDES FACING UP).
5. Close the battery cap.
6. Slide and lock the battery cap along the direction of
arrow.
7. Fit the tester’s cap while making sure to push all the
way down. The tester’s waterproof design may be
compromised if the cap is not fitted correctly.
Self-Diagnostic Messages
Specifications
Power: four AAA batteries (included); >400 hours of
continuous operation
Low-voltage warning:
battery status icon flashes
Auto power-off: tester automatically turns off after 8 minutes
of nonuse
1065O101_MAN_pH1_35634-05 March 2018
www.4oakton.com
pH
Range 0 to 14.0 pH
Resolution 0.1 pH
Accuracy ±0.1 pH
Calibration points 1, 2, or 3 points
Automatic temperature
compensation
32 to 122°F
(0 to 50°C)
Temperature
Range
32 to 122°F
(0 to 50°C)
Resolution 0.1°F/°C
Accuracy ±0.9°F (0.5°C)
Model Product description Catalog number
pH1 EcoTestr pocket pH tester 35634-05
Warranty
We warrant this instrument to be free from defects in
material and workmanship and agrees to repair or replace
free of charge, at option of Oakton Instruments, any
malfunctioned or damaged product attributable to
responsibility of Oakton Instruments, for a period of
two years from the delivery (a six-month limited warranty
applies to probes). This warranty does not apply to
defects resulting from actions such as misuse (violation
of the instructions in this manual or operations in the
manner not specified in this manual), improper mainte-
nance, and unauthorized repairs. Warranty period is the
time limit to provide free service for the products
purchased by customers, not the service life of the tester
or probe.
Oakton Instruments reserves the right to update the
information in this manual without giving notice in
advance.
Symbol
Self-diagnosis
information
How to fix
Er 1
Wrong pH
calibration
solution, or
measured value
is not within the
range of
the tester.
• Check if calibration
solution is correct.
• Check if probe is damaged.
• Check if there is any air
bubble in the glass bulb
sensor.*
Calibration
order not
performed
correctly.
The 1st point calibration
must be pH 7.00. Perform
the 2nd point calibration (pH
4.00) immediately after the
1st point. Do NOT turn off
the tester until user conducts
the 2nd point calibration,
otherwise user will need to
restart the process with the
1st point calibration.
Er 2
CAL/ is
pressed before
measurement
is stable
( appears
and stays)
Wait for the measurement
stability icon () to appear
and stay, then press CAL/ .
* If you find any air bubble in the glass bulb of the pH sensor, simply invert
the probe for a few times to remove it. The existence of an air bubble in the
glass bulb will significantly decrease the accuracy of measurement.
4 x AAA Batteries
+
+
+
+
_
_
_
_
1
2
3
4
5
6
7
1065O101_MAN_pH1_35634-05.indd 2 03/22/2018 4:01:52 PM
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