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Factory Reset
Reset to the Factory Default Settings by using the Factory
Reset function.
1. Press MENU/ v to enter setup window. Scroll down by
pressing MENU/ v to select Reset. Press HOLD/ to select
Reset. The display shows User Reset and Factory Reset.
2. Scroll down by pressing MENU/ v to toggle between the
resets. Press HOLD/ to select Factory Reset.
3. The display automatically shows No and Yes. Scroll down
by pressing MENU/ v to toggle between No and Yes.
4. Press HOLD/ to confirm either No or Yes. The display
shows the Factory Reset option with a
Key Info
hold
menu
hold
Measure
Factory
Scroll
MENU
Settings
Reset
Accept
HOLD
Temp Set
User Reset
EXIT
CAL
Reset
HOLD Function
This feature lets you freeze the display for a delayed
observation.
1. Press HOLD/ button to
2. Press HOLD/ again to
freeze the measurement.
release the measurement.
COND
COND
COND
hold
µs/cm
µs/cm
820
µs/cm
Press Hold
Press Hold
820
to release
to release
23.5°C
23.5°C
23.5°C
Sensor Maintenance
1. Always keep the sensor electrodes clean. Rinse the
electrodes with de-ionized water and wipe them dry with
clean cloth before storing with its protective cap. For cup
type electrodes, remove the white plastic cup and insert
to thoroughly clean viscous solutions. Note: Never scratch
electrodes with a hard substance.
2. For better performance, soak the electrode in alcohol for
10 to 15 minutes and rinse with de-ionized water before
starting any measurement process. This is to remove dirt
and oil stains on the electrode, which may affect the
accuracy of the measurements.
7
Self-Diagnostic Messages
Batteries are weak and need replacement soon.
Appears when calibration is attempted but the reading
stable error
is not yet stable. Wait for the reading to stabilize or
manually confirm the calibration by pressing enter.
buffer error The buffer is outside of the calibration range.
The 2nd and 3rd calibration point is not within 80% to
slope error
120% slope range.
over range
The reading is above the measuring range of tester.
under range The reading is below the measuring range of tester.
Specifications
Specifications
PCTSTestr 50
pH
pH range
–1.00 to 15.00 pH
Resolution
0.01 pH
Relative accuracy
±0.01 pH
Calibration points
Up to 3 points
Buffer set standard
USA: 4.01/7.00/10.01
selection
NIST: 4.01/6.86/9.18
Calibration window
±1.00 pH
Calibration type
Point to point
Conductivity
0.0 to 200.0 μS, 200 to 2000 μS,
Conductivity range
2.00 to 20.00 mS
Resolution
0.1 μS, 1 μS, 0.01 mS
Relative accuracy
±1% full scale
Normalization temperature 25.0ºC (77ºF)
Temperature co-efficient
0.0% to 10.0%
Calibration points
Up to 3 points
TDS
0.0 to 100.0 ppm, 100 to 1000 ppm,
TDS range
0.10 to 10.00 ppt (TDS factor 0.5)
Resolution
0.1 ppm, 1 ppm, 0.01 ppt
Relative accuracy
±1% full scale
Calibration points
Up to 3 points
TDS factor
0.40 to 1.00 (selectable)
Salinity
Salinity range
0.00 to 10.00 ppt
Resolution
0.10 ppt
Relative accuracy
±1% full scale
Calibration points
1
10
1065O100_MAN_35634-35.indd 2
Sensor Replacement
You can replace the sensor module at a fraction of the cost
of a new tester. When the tester fails to calibrate or gives
fluctuating readings in calibration standards, you need to
change the electrode.
1. With dry hands, grip the ring with sensor facing you.
Twist the ring counterclockwise. Save the ring for later use.
2. Pull the old sensor module away from the tester.
3. Align the four tabs on the new module so that they
match the four slots on the tester.
4. Gently push the module onto the slots to sit it in position.
Push the smaller O-ring fully onto the new sensor
.
module. Push the other O-ring over the module and
thread it into place by firmly twisting clockwise.
hold
Note: It is necessary that you recalibrate your tester prior
No
to measurement after a sensor replacement.
Yes
COND
hold
820
µs/cm
820
23.5°C
For Sales & Service Contact
2650 E. 40th Ave. • Denver, CO 80205
Phone 303-320-4764 • Fax 303-322-7242
Specifications (cont.)
Temperature
Temperature range
Temperature resolution
Temperature accuracy
Temperature
compensation
General
Display
Backlight
Auto off
Reset
Power requirement
Battery life
Water proofing
Regulatory
certifications
Environmental Operating Conditions
Ambient operating
temperature
Relative humidity
Storage temperature
Storage humidity
1-800-833-7958
www.geotechenv.com
8
PCTSTestr 50
0 to 60°C (32.0 to 140.0°F)
0.1°C / 0.1°F
From 0 to 50ºC (±0.5°C / ±0.9°F + 1 LSD);
from 50 to 60°C (±1.0ºC / ±1.8°F + 1 LSD)
Yes (Automatic Temperature
Compensation)
Graphics, dot matrix 80 x 100 pixel
Yes, selectable
(30 sec from last key press)
8.5 minutes (from last key press)
User / Factory
Four AAA 1.5 V batteries
>150 hours
IP67
CE, FCC
5 to 45°C / 41 to 113°F
5% to 85% noncondensing
–20 to 60°C / –4 to 140°F
5% to 85% noncondensing
11
Replacing the Batteries
The PCTSTestr 50 Pocket Tester uses four AAA 1.5 V batteries.
1. To remove the battery
cover, see Figure 1.
Clear the front catch
and then the back
catch, before sliding
the cover off.
2. To remove the battery
plate, push the center
Fig. 1: Removing battery cover
tab towards the front
of the tester as shown
in Figure 2. Once
unlocked, remove the
plate to access the
batteries.
3. Invert the tester
upside down to
Fig. 3: Align tabs
remove the batteries.
Each side uses two
AAA batteries. Orient
each battery with
positive terminal facing
downward.
4. To lock the battery
place, align the small
Fig. 5: Battery plate unlocked
tabs (Figure 3) into the
guide ribs on the hous-
ing and then press
down. See Figure 4.
Warranty
This instrument is supplied with a warranty against
manufacturing defects for a period of one year from the
date of purchase.
Return of Items
Authorization must be obtained from your distributor
before returning items for any reason. When applying for
authorization, please include information regarding the
reason the item(s) are to be returned.
We reserve the right to make improvements in design,
construction and appearance of products without notice.
Prices are subject to change without notice.
9
Accessories
Ordering
Product Description
Code
PCTSTestr 50 pocket tester with case, lanyard,
35634-35
and batteries
35634-37
Replacement sensor module for PCTSTestr 50
35634-09
Replacement sensor cap
Replacement alkaline batteries; AAA, 1.5 V.
09376-00
Pack of 12
17101-45
NIST-traceable calibration with data for pocket testers
www.4oakton.com
1065O100_MAN_35634-35
August, 2017
Fig. 2: Push to unlock
Fig. 4: Push down to lock
Fig. 6: Battery plate locked
9/5/2017 3:09:48 PM
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