Lutron Electronics PDO-519 User manual

Pen type, auto calibration

DISSOLVED

OXYGEN METER

Model : PDO-519

Your purchase of this

DISSOLVED OXYGEN

METER marks a step

forward for you into the

field of precision

measurement. Although

this METER is a complex

and delicate instrument,

its durable structure will

allow many years of use if

proper operating

techniques are developed.

Please read the following

instructions carefully and

always keep this manual

within easy reach.

OPERATION MANUAL

ATTENTION :

Fill the Probe's Electrolyte at first.

Intend to keep the DO probe under

the best condition, when user receive

the DIGITAL OXYGEN METER along

the PROBE, it should fill the

Probe's Electrolyte at first.

` Probe-fillin

Electrolyte

Probe head with Diaphragm set

The procedures that to fill the Probe's

Electrolyte, refer the chapter 5

" PROBE MAINTENANCE ", page 9.

TABLE OF CONTENTS

1. FEATURES................................................................

2. SPECIFICATIONS......................................................

3. FRONT PANEL DESCRIPTION.....................................4

3-1 Display................................................................4

3-2 Power button.......................................................4

3-3 HOLD button ( Unit button ).................................4

3-4 REC button ( , button ).................................℃℉ 4

3-5 Probe head with diaphragm set............................

3-6 Battery compartment/Cover.................................

3-7 Protection cover for probe head.......................... 4

4. MEASURING PROCEDURE..........................................5

4-1 Calibration...........................................................5

4-2 Dissolved Oxygen ( DO) measurement .................6

4-3 Oxygen in Air ( O2) measurement ........................7

4-4 Temperature measurement..................................

4-5 Data Hold............................................................8

4-6 Data Record ( Max., Min. reading ).......................

5.PROBE MAINTENANCE...............................................9

6. BATTERY REPLACEMENT...........................................11

7. OPTIONAL CARRYING CASE.......................................11

1. FEATURES

* This Digital Dissolved Oxygen Meter is supplied with a

polarographic type probe with an incorporated Temp.

sensor which serves for precise Dissolved Oxygen ( DO )

and Temp. measurement.

* Applications for Aquarium, Medical research, Agriculture,

Fish hatcheries, Laboratory, Water conditioning, Mining

industry, Schools & Colleges, Quality control...

* Heavy duty dissolved oxygen probe, probe head size

can connect with BOD bottle

* All in one Pen type Dissolved Oxygen Meter, easy

operation.

* Automatic Temp. compensation from 0 to 50 for sensor.℃

* Microprocessor circuit assures high accuracy and provides

special functions and features.

* Multi-display, show Dissolved oxygen & Temp. at the

same time.

* Build in temperature , measurement.℃℉

* Temperature unit can default to or .℃℉

* LCD with two display, easy readout.

* Auto power off to save the battery life.

* IP-67 Water resistance.

* Records Maximum and Minimum readings with recall.

* Data hold function for freezing the desired value.

* Use the durable, long-lasting components, including a

heavy duty & compact ABS-plastic housing case.

2. SPECIFICATIONS

Display LCD size : 29 mm x 28 mm.

Dual function LCD

Circuit Custom one-chip of microprocessor LSI

circuit.

Measurement Dissolved Oxy

en 0 to 20.0 m

/L ( liter ).

& Ran

eAirOxy

en 0 to 100.0 %.

* For reference only

Temperature 0 to 50 .℃

Dissolved Oxy

en 0.1 m

/L.

Resolution Oxy

en in Air 0.1 % O2 .

Temperature 0.1 .℃

Accuracy Dissolved Oxy

en ± 0.4 m

/L.

(23± 5 )℃Oxy

en in Air ± 0.7% O2.

* For reference only

Temperature ± 0.8 /1.5 .℃℉

Sensor The polaro

raphic type oxy

en probe with

Structure an incorporated temperature sensor.

Temp. 0 to 50 ,℃

Compensation

* Automatic adjustment

Memory Records Maximum, Minimum readin

s with

Recall recall.

Power of

Auto power off saves battery life, or manual

off by push button.

Data Hold Freeze the display reading.

Sampling Time Approx. 1 second.

of display

Operating 0 to 50 .℃

Temperature

Operating Less than 80% RH.

Humidity

Power Supply DC 1.5V battery ( UM-4/AAA ) x 4 PCs.

Power Current Approx. DC 6.2 mA.

Weight 176 g/0.39 LB.

* Include probe and batterry.

Protection IP-65 : 0 to 50 .℃

IP-67 : 0 to 30 .℃

Dimension 180 x 40 x 40 mm ( 7.1 x 1.6 x 1.6 inch ).

Accessories Soft carryin

case ( CA-05A )..........

1 PC.

Included Operation manual...........................1 PC.

Spare Probe head with Diaphragm

OXHD-04.......................................

2 set

Probe-filling Electrolyte

OXEL-03........................................

1 set

Optional * Spare Probe head with

probe and Diaphra

m set.....................OXHD-04

accessories * Probe-fillin

Electrolyte........

OXEL-03

* Hard carryin

case...............CA-06

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Display

3-2 Power button

3-3 HOLD button ( Unit button )

3-4 REC button ( , button )℃℉

3-5 Probe head with diaphragm set

3-6 Battery compartment/Cover

3-7 Protection cover for probe head

4. MEASURING PROCEDURE

4-1 Calibration

Before the measurement, the meter should be processed

the following calibration procedures :

1)Move the " Protection cover " ( 3-7, Fig. 1 ) away from

the " Probe head " ( 3-5, Fig. 1 ).

Power on the instrument by pushing the " Power Off/On

button " ( 3-2, Fig. 1 ).

The " Display " ( 3-1, Fig. 1 ) will show the

" O2% " and the " Temp. " value as example :

21.4

26.4 ℃% O2

The upper display ( %O2 display ) value will

be changed, wait for approx. 3 minutes at least

until the upper display reading values become

stable & no fluctuation.

Press the " HOLD button " ( 3-3, Fig. 1 ) once, the

" Display " ( 3-1, Fig. 1 ) will show the " Hold "

indicator, then following press the " REC button "

( 3-4, Fig. 1 ) once, the Display will show :

30 Count down from

CAL 30 to 0 and " End "

The text " CAL " will flash, the upper value will

count down from 30 to 0 and " End " , then show as :

20.9

26.4 ℃% O2

The upper display will show the values exactly

same as 20.9 or 20.8. ( As the oxygen in air is

20.9 % typically, so use the environment air 02

value for quick & precise calibration ).

Now the calibration procedures are finished !

Calibration Consideration :

Please process calibration procedures

under wide and ventilating

environment for best effect.

4-2 Dissolved Oxygen ( DO) measurement

1)After the meter be calibrated ( above procedure 4-1 ),

the meter is ready for measurement.

2)Press the " Unit button " ( 3-3, Fig. 1 ) continuously

at least two seconds, the display indicator will change

from " % O2 " change to " mg/L ", now the meter

is ready for Dissolved Oxygen ( DO ) measurement.

3)* Immersed the " Probe head " ( 3-5, Fig. 1 ) to

the measured liquid ( sample ) completely in order

for the probe to be influenced by the automatic

temperature compensation circuit, refer to Fig. 2, page 7.

* As for the thermal

equilibrium to occur

between the probe & the

measurement sample Fig. 2

( liquid ) must be taken,

it will take a few minutes

typically.

4)* In order to measure the dissolved oxygen content in

any given liquid, it is sufficient to immerse the tip of

the probe in the solution, making sure that velocity

of the liquid coming into contact with the probe is at

least 0.2 - 0.3 m/s or to shake the probe.

* During laboratory measurements, the use of a

magnetic agitator to ensure a certain velocity in the

fluid is recommended. In this way, errors due to the

diffusion of the oxygen present in the air in the

solution are reduced to a minimum.

5)Rinsed the probe accurately with normal tap water after

each series of measurement.

Install " Probe head protection cover " ( 3-7, Fig, 2 )

into the " Probe head " ( 3-5, Fig. 2 ).

4-3 Oxygen in Air ( O2 ) measurement

After the meter be calibrated ( above procedure 4-1 ),

the meter is ready for O2 ( Oxygen in air ) measurement,

the display will show the indicator " O2% " .

* The Air oxygen measurement value is for reference only.

4-4 Temperature measurement

During the measurement, the lower LCD Display will

show the temperature values of measuring solution.

The method to change the Temp. unit from

" " to " " or " " to " " are :℃℉℉℃

Table of contents

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