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User Reset
Reset the CTS calibration to the user's default settings by using the user reset function.
Temperature user calibration is not affected by the user 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. Press HOLD/ to select User 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. Display shows User Reset option with a .
Key Info
hold
menu
hold
Measure
Scroll
MENU
User Reset
Settings
No
Accept
HOLD
Temp Set
Factory Reset
Yes
Reset
EXIT
CAL
Factory Reset
Reset the CTSTestr to the factory default settings by using the factory reset function.
1. Press MENU/v to enter setup window. Scroll down by pressing the 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
menu
hold
hold
Measure
User Reset
Scroll
MENU
Settings
No
Factory Reset
Accept
HOLD
Temp Set
Yes
Reset
EXIT
CAL
HOLD Function
This feature helps to freeze the display for a delayed observation.
1. Press HOLD/ button to freeze
2. Press HOLD/ again to release
measurement.
measurement.
COND
COND
COND
μs/cm
μs/cm
820
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 sensors electrodes clean. Rinse the electrodes with
deionized 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. 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.
1065O100_MAN_35634-55,-65.indd 2
Sensor Replacement
Replace the sensor module at the 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 counter-
clockwise. 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.
Note: It is necessary that you recalibrate your tester prior to measurement after
a sensor replacement.
hold
Replacing the Batteries
The CTSTestr 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.
COND
hold
2. To remove the battery plate, push the
center tab towards the front of the tester
μs/cm
820
as shown in Figure 2. Once unlocked,
23.5 °C
remove the plate to access the batteries.
3. Invert the tester upside down to remove
the batteries. Each side uses two
AAA batteries. Orient each battery with
positive terminal facing downward.
4. To lock the battery plate, align the small
tabs (Figure 3) into the guide ribs on
the housing 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.
Self-Diagnostic Messages
stable error
over range
Specifications
Conductivity
Conductivity range
Resolution
Relative accuracy
Normalization temperature
Temperature co-efficient
Calibration points
TDS
TDS range
Resolution
Relative accuracy
Calibration points
TDS factor
Salinity
Salinity range
Resolution
Relative accuracy
Calibration points
Temperature
Temperature range
Temperature resolution
Temperature accuracy
Temperature compensation
General
Display
Auto off
Reset
Power requirement
Battey life
Water proofing
Fig. 1: Removing battery cover
Fig. 2: Push to unlock
Environmental operating conditions
Ambient operating
temperature
Relative humidity
Storage temperature
Storage humidity
Fig. 3: Align tabs
Fig. 4: Push down to lock
Accessories
Ordering Code
35634-55
35634-65
35634-57
35634-07
Fig. 5: Battery plate unlocked
Fig. 6: Battery plate locked
35634-09
09376-00
17101-45
1065O100_MAN_35634-55,-65
Batteries are weak and need replacement soon.
Appears when calibration is attempted but the reading is not yet stable. Wait for
the reading to stabilize or manually confirm the calibration by pressing enter.
The reading is above the measuring range of tester.
CTSTestr 50
0.0 to 200.0 μS, 200 to 2000 μS, 2.00 to 20.00 mS
0.1 μS, 1 μS, 0.01 mS
±1% full scale
25.0ºC (77ºF)
0.0% to 10.0%
Up to 3 points
0.0 to 100.0 ppm, 100 to 1000 ppm, 0.10 to 10.00 ppt (TDS Factor 0.5)
0.1 ppm, 1 ppm, 0.01 ppt
±1% full scale
Up to 3 points
0.40 to 1.00 (selectable)
0.00 to 10.00 ppt
0.10 ppt
±1% full scale
1
0 to 60°C (32.0 to 140.0°F)
0.1°C / 0.1°F
From 0 to 50ºC (±0.5ºC / ±0.9ºF + 1 LSD);
from 50 to 60ºC (±1.0ºC / ±1.8ºF + 1 LSD)
Yes (Automatic Temperature Compensation)
Graphics, dot matrix 80 x 100 pixel
8.5 minutes (from last key press)
User / Factory
Four AAA 1.5 V batteries
>150 hours
IP67
5 to 45°C / 41 to 113°F
5% to 85% noncondensing
–20 to 60°C / –4 to 140°F
5% to 85% noncondensing
Product Description
CTSTestr 50P pin-style pocket tester with case, lanyard, and batteries
CTSTestr 50C cup-style pocket tester with case, lanyard, and batteries
Replacement sensor module for CTSTestr 50P pin-style tester
Replacement sensor module for CTSTestr 50C cup-style tester
Replacement sensor cap
Replacement alkaline batteries; AAA, 1.5 V. Pack of 12
NIST-traceable calibration with data for pocket testers
www.4oakton.com
August, 2017
9/5/2017 3:07:29 PM
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