Sper scientific 850050 User manual

Large Display
pH Pens
850050, 850051, 850052

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Large Display pH Pens -
850050, 850051, 850052
Copyright ©2015 by Sper Scientic
ALL RIGHTS RESERVED. Printed in the USA
The contents of this manual may not be reproduced
or transmitted in any form or by any means electronic,
mechanical, or other means that do not yet exist or may
be developed, including photocopying, recording, or any
information storage and retrieval system without the express
permission from Sper Scientic.
NOTE REMOVING PROTECTIVE CAP:
Hold the blue ring rmly in place with one hand,
rotate the semi-transparent bottle 180° ~ 360°
clockwise. This will loosen the gasket to allow you
to pull the cap off. Reverse the procedure to put
the cap back on.

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TABLE OF CONTENTS
1. INTRODUCTION . . . . . . . . . . . . . 3
2. MATERIALS SUPPLIED. . . . . . . . . . 3
3. FRONT PANEL DESCRIPTION . . . . . . 4
4. CALIBRATION INSTRUCTIONS . . . . . 5
5. MEASUREMENT PROCEDURE . . . . . 6
6. BATTERY REPLACEMENT . . . . . . . . 9
7. TROUBLESHOOTING . . . . . . . . . .10
8. SPECIFICATIONS. . . . . . . . . . . . .11
9. WARRANTY . . . . . . . . . . . . . . . .12
INTRODUCTION
These are simple and easy to use waterproof
pH Pens. 850050 measures 2~14 pH. 850051 &
850052 features Hold and Automatic Temperature
Control (ATC), and measures from 0~14 pH.
MATERIALS SUPPLIED
Meter
Batteries
Instruction Manual

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FRONT PANEL DESCRIPTION
850050 850051 & 850052
Hold
Calibration
On/Off
pH Value
Symbol when
Battery is
Low
Temperature
First Use: If the unit fails to turn on, check that the
batteries are working and properly installed.

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OPERATING INSTRUCTIONS
1. Calibrate routinely before use, anytime the
readings seem erratic, and whenever the
batteries are replaced.
2. Remove the protective cap.
3. Clean the electrode with de-ionized/distilled
water. Note: Crystals may form in the cap and
these can be soaked or rinsed away.
Do not touch or rub the glass bulb.
4. Before rst use or after extended storage,
soak the electrode in KCL (potassium chloride)
solution for 10~30 minutes.
5. Press >1 sec to turn on the unit.
6. For 1-point calibration, dip/stir the electrode into
pH 7 buffer solution and press the CAL button.
If the probe is damaged or cannot detect the
buffer, the unit automatically exits calibration
mode after 10 seconds.
7. During calibration, “CA” ashes on the display.
8. Then, “CAL” and the pH value are shown.
The ATC value is also shown in models 850051
& 850052.

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9. “SA” (save) is displayed as the calibration point
is saved.
10. “En” (end) (850050, 850051), or “End”
(850052) displays when the calibration ends.
11. For 2 or 3 point calibration, start with pH 7,
then repeat the above steps for pH 4 and/or
pH 10.
12. For the most accurate readings, the
temperature of the sample and cliabration
solutions should be similar.
13. Repeat the above procedures until
readings stabilize.
14. NOTE: If the buffer needs to be adjusted, press
▲ to adjust the displayed value. “SA” (save) is
displayed, followed by “En” (850050, 850051),
or “End” (850052).
MEASUREMENT PROCEDURE 850050
1. Calibrate routinely before use.
2. Remove the protective cap and clean the
electrode with de-ionized/distilled water. Do not
touch the glass bulb.
3. Press >1 sec to turn on the unit.

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4. Dip/stir the electrode into the sample.
5. The pH value is displayed.
6. “- - -” is displayed when the pH sample is out
of range.
7. During measurement, press ▲ to freeze the
reading on the LCD.
“Hold” is displayed. Press ▲ again to return
to normal measurement.
8. The pH Pen automatically shuts off after 20
minutes of inactivity. To disable this feature,
start with the unit off, then simultaneously press
the CAL and ▲ buttons. Release both buttons
when “n” is displayed. The unit returns to
measurement mode.
9. After use, turn off the unit and rinse the electrode.
10. Protect the electrode’s lifespan by adding a
few drops of KCL (potassium chloride) solution
into the protective cap before storage.
11. Always keep the protective cap on when the
unit is not in use.

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MEASUREMENT PROCEDURE 850051 & 52
1. Calibrate routinely before use.
2. Remove the protective cap and clean the
electrode with de-ionized/distilled water.
Do not touch the glass bulb.
3. Press >1 sec to turn on the unit.
4. Dip/stir the electrode into the sample.
5. The pH value is displayed.
6. “- - -” is displayed when the pH sample is out
of range.
7. “H” or “L” is displayed when the temperature is
out of range.
8. To switch between °F and °C, start with the unit
off, then simultaneously press CAL and .
9. Release both buttons when “C” or “F” is shown.
10. Press ▲ to select the preferred unit, then
press CAL to save.
11. “SA” (save) is displayed and the
unit returns to measurement mode.
12. During measurement, press ▲ to freeze the
reading on the LCD. “Hold” is displayed. Press
▲ again to return to normal measurement.

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13. The pH Pen automatically shuts off
after 20 minutes of inactivity. To disable
this feature, start with the unit off, then
simultaneously press the and ▲ buttons.
Release both buttons when “n” is displayed.
The unit returns to measurement mode.
14. After use, turn off the unit and rinse
the electrode.
15. Protect the electrode’s lifespan by adding a
few drops of KCL (potassium chloride) solution
into the protective cap before storage.
16. Always keep the protective cap on when the
unit is not in use.
BATTERY REPLACEMENT
1. Replace all 4 LR44 batteries when the low
battery icon is ashing, or when troubleshooting
(next page) fails.
2. Unscrew the cover and install the batteries with
the at positive (+) side facing the springs.
3. Do not remove the O-ring.
4. Remove the batteries when the unit is not in use
for an extended period.

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TROUBLESHOOTING
1. If there is no display, or you have erratic
readings after having soaked the electrode in
KCL (potassium chloride) solution for at least
1 hour prior to calibration, check the continuity
of the batteries by removing them for 1 minute,
then reinsert.
2. Slow Response: Soak the electrode in KCL
(potassium chloride) solution for 10-15 minutes,
then rinse with distilled/de-ionized water.
3. “- - -” displays when the pH sample is too acidic
or too alkaline.
4. No Display: Be sure to press for at least one
second. If the problem persists, see Battery
Replacement (previous page).
5. If your readings are still erratic after calibration,
soak the electrode for 10 to 30 minutes in KCL
(potassium chloride) solution.
6. Note: It is normal for the pH value to uctuate
quickly when the electrode is exposed to air
and not immersed.