LARGE DISPLAY
ATC PH PENS
850051 and 850052
WARRANTY: Sper Scientific warrants
this product against defects in materials
a n d w o r k m a n s h i p f o r a
period of 1 year from the date of
purchase, and agrees to repair or
replace any defective unit without
charge If your model has since been
discontinued, an equivalent Sper
Scientific product will be substituted if
available This warranty does not cover
probes, batteries, or damage resulting
from accident, misuse, or abuse In or-
der to obtain warranty service, ship the
unit postage prepaid to:
SPER SCIENTIFIC
7720 E Redfield Rd, Ste 7
Scottsdale, AZ 85260
Email: info@sperscientific com
Include a description of the problem and
your return address along with the re-
t u r n e d i t e m R e t u r n t h e
warranty card within 10 days or
register at: www sperscientific com
BATTERY REPLACEMENT
• Replace all 4 LR44 batteries when the
low battery icon is flashing, or when
troubleshooting (below) fails
• Unscrew the cover and install the
batteries with the flat positive (+) side
of the batteries facing the spring
• Do not remove the O-ring
• Remove the batteries when the unit is
not in use for an extended period
TROUBLESHOOTING
• If there is no display, or you have
erratic readings after having soaked
the electrode in distilled/de-ionized
water for at least 1 hour prior to
calibration, check the continuity of the
batteries by removing them for 1
minute, then reinsert
• Slow Response: Soak the electrode in
tap water for 10-15 minutes, then rinse
with distilled/de-ionized water
• "- -
-
" displays when the pH sample is
too acidic or too alkaline
• "H" or "L" displays when the
temperature is too hot (H) or too cold
(L)
• No Display: Be sure to press for at
least one second If the problem
persists, see Battery Replacement
(above)
• If your readings are still erratic after
calibration, soak the electrode for 10
to 30 minutes in distilled water
• Note: It is normal for the pH value to
fluctuate quickly when the electrode is
exposed to air and not immersed
SPECIFICATIONS
pH Range 0~14 pH
pH Resolution
850051
850052
0 1 pH
0 01 pH
0 5 °F/°C
0 1°F/°C
Accuracy
850051
850052
±0 2 pH
±0 05 pH
±1°C
±0 5°C
Adjustable
Calibration
Points
pH 4
pH 7
pH 10
3 5~4 5
6 5~7 5
9 5~10 5
Temp
Range
Operating
Environ
31~122°F
0~50°C
<80 RH
Weight 2 4 oz, 68g with battery
Dimension 6½" x 1½" x 1"
165 x 35 x 32 mm
0~60°C
