LT PO2-250 Operation Manual
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LT PO2-250 Operation Manual

O2 meter
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Pen type, air oxygen and Temp.
O
METER
2
Model : PO2-250
OPERATION MANUAL
Your purchase of this
OXYGEN METER marks
a step forward for you
into
the
field
precision measurement.
Although this METER is
a complex and delicate
instrument, its durable
structure
will
many years of use if
p r o p e r
o p e r a t i n g
t e c h n i q u e s
developed. Please read
t h e
f o l l o w i n g
instructions
and always keep this
manual
within
reach.
of
allow
a r e
carefully
easy

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Summary of Contents for LT PO2-250

  • Page 1 Pen type, air oxygen and Temp. METER Model : PO2-250 Your purchase of this OXYGEN METER marks a step forward for you into field precision measurement. Although this METER is a complex and delicate instrument, its durable structure will allow...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. FEATURES..............1 2. SPECIFICATIONS............1 2-1 General Specifications.......... 1 2-2 Electrical Specifications........2 3. FRONT PANEL DESCRIPTION........4 3-1 Oxygen/Temp. Sensor..........4 3-2 Power Button............4 3-3 Hold Button............4 3-4 REC ( Max./Min. ) Button........4 3-5 LCD Display............4 3-6 Battery Compartment/Cover......... 4 4.

  • Page 3: Features

    * O2 ( Air oxygen ) and Temp. ( Air Temp. ) measurement. * O2 measurement range : 0 to 30.0 % x 0.1 %. * O2 Buzzer warning : If the measurement value < 18.0 %O2, the buzzer will sound for warning.
  • Page 4 Circuit Custom one-chip of microprocessor LSI circuit. Data Hold Freeze the display reading. Sampling Time Approx. 1 second. Power off Auto shut off saves battery life. Operating 0 to 50 ℃ Temperature Operating Less than 80% R.H. Humidity Power Supply DC 1.5 V battery ( UM4/AAA ) x 4 PCs.

  • Page 5: Electrical Specifications

    0.9 to 1.1 atmosphere. pressure range Expected life 2 years. ≧ time Alarm If the measurement Air oxygen value < 18.0 %O2, the buzzer wll sound for warning. Temperature ( Air Temp. ) Range to 50 to 122 ℃ ℃...

  • Page 6: Front Panel Description

    3. FRONT PANEL DESCRIPTION Fig. 1 3-1 Oxygen/Temp. Sensor 3-2 Power Button 3-3 Hold Button 3-4 REC Button 3-5 LCD Display 3-6 Battery Compartment/Cover...

  • Page 7: Measuring Procedure

    " ". ℉ O2 Buzzer warning If the measurement value < 18.0 %O2, the buzzer will sound for warning. O2 Buzzer warning disable Power off the meter, press the " REC Button " ( 3-4, Fig. 1 ) continuously then power on the meter ( press the "...

  • Page 8: Auto Power Off

    2)With the " REC " symbol on the display : a) Press the " REC Button " ( 3-4, Fig. 1 ) once, the " REC MAX " symbol along with the maximum value will appear on the display. * If intend to delete the maximum value, just press the "...

  • Page 9: Calibration

    5. CALIBRATION 1)Due to the air oxygen value is 20.9 % typically, so use the environment air oxygen value for quick & precise calibration) Please make calibration procedures under wide and ventilating environment for best effect. 2)Power on the meter, Wait 3 minutes at least until the display reading values become stable &...

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