Sper Scientific 850050 Large Display pH Pen - Manual

INTRODUCTION
This simple and easy to use waterproof
pH Pen measures from 2~12 pH.
DISPLAY / FACEPLATE
CALIBRATION
 Calibrate routinely before use, an-
ytime the readings seem erratic, and
whenever the batteries are replaced.
 Remove the protective cap.
 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.
 Before first use or after extended
storage, soak the electrode in
distilled water for 10~30 minutes.
 Press >1 sec to turn on the unit.
 For 1-point calibration, dip/stir the
electrode into pH 7 buffer solution
and press the button. If the
probe is damaged or cannot detect
the buffer, the unit automatically exits
calibration mode after 10 seconds.
 During calibration, "CA" flashes on
the display.
 Then, "CAL" and the pH value are
shown.
 "SA" (save) is displayed as the
calibration point is saved.
 "En" (end) displays when the
calibration ends.
 For 2 or 3 point calibration, start with
pH 7, then repeat the above steps for
pH 4 and/or pH 10.
 For highest accuracy, calibrate at the
sample temperature.
 Repeat the above procedures until
readings stabilize.
 NOTE: If the buffer value is not
standard (for example 4.2), press ▲
to adjust the displayed value.
"SA" (save) is displayed, followed by
"En" (end).
MEASUREMENT
 Calibrate the pen as needed.
 Remove the protective cap and clean
the electrode with de-ionized/distilled
water. Do not touch the glass bulb.
 Press >1 sec to turn on the unit.
 Dip/stir the electrode into the sample.
 The pH value is displayed.
 "- -
-
" is displayed when the pH
sample is out of range.
 During measurement, press ▲ to
freeze the reading on the LCD.
"Hold" is displayed. Press ▲ again to
return to normal measurement.
 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.
 After use, turn off the unit and rinse
the electrode.
 Protect the electrode's lifespan by
adding a few drops of KCL (potassium
chloride) solution into the protective
cap before storage.
 Always keep the protective cap on
when the unit is not in use.
Rev. 3/29/2011
Pull to
Remove the
Protective Cap
Electrode
FIRST USE: If the
unit fails to turn on,
check that the
batteries are working
and properly
installed.
HoldCal
7.0
ATC
87. 5
C
F
pH Value
Symbol will
flash when
battery is low
Hold
button
Calibration
button
On/Off
button
▲
HLD
CAL