LT PO2-250 Operation Manual Download Page 5

2-2 Electrical Specifications  (23± 5  )

O2 ( Air oxygen )

Range

0 to 30 %O2.

Resolution

0.1 %O2.

Accuracy

± ( 1 % r 0.2 % O2 ).

 @ After calibration

Response time

 15 seconds.

 @ t 90

Overload 100 

%O2.

protection
Environment

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

0   to 50  ,32   to 122  .

Resolution

0.1 degree

Accuracy

 - ± 0.8  .

 - ±  1.5  .

@ Above specification tests under the environment RF Field Strength less than

3 V/M & frequency less than 30 MHz only.

3

Summary of Contents for PO2-250

Page 1: ...eld of precision measurement Although this METER is a complex and delicate instrument its durable structure will allow 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 a r e deve...

Page 2: ...en 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 MEASURING PROCEDURE 5 4 1 O2 Air oxygen Temp Air Temp measurement 5 4...

Page 3: ...aves battery life Operates from DC 1 5V UM4 AAA x 4 PCs batteries Microprocessor circuit ensure high accuracy and also and also provides special functions and features Durable and compact ABS plastic...

Page 4: ...ly DC 1 5 V battery UM4 AAA x 4 PCs Power Current Approx DC 4 0 mA Weight 194 g 0 43 LB Dimension 180 x 40 x 40 mm 7 1 x 1 6 x 1 6 Accessories Instruction manual 1 PC Included Soft carrying case CA 52...

Page 5: ...2 protection Environment 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 0...

Page 6: ...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 4...

Page 7: ...ent 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 Power Button once the O2...

Page 8: ...emory function continuously c To exit the memory record function just press the REC button for 2 seconds at least The display will revert to the current reading 4 4 Auto power off 1 In order to prolon...

Page 9: ...e time Until the upper Display show the text CAL the lower Display will show the value 20 9 release the two fingers from the buttons the text CAL will flashing within several seconds then the Display...

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