Sper Scientific 850045 User Manual

Dissolved Oxygen Pen

Meter

850045

Instruction Manual

TABLE OF CONTENTS

Features …………………………………...…...……... 3

Front Panel Description ……………………………… 4

Calibration …………………………………………….. 5-6

Measurement Procedures ………………………..…. 7-9

Probe Maintenance …………………….…………… 10-11

Specifications ……..………………………….………. 12-13

Battery Replacement ………………………...….…... 14

FEATURES

 Heavy duty polarographic D.O. probe including

temperature sensor

 Automatic Temperature Compensation

 Microprocessor assures high accuracy

 Dual display LCD

 Auto power off

 IP-67 water resistance.

 Maximum and Minimum

 Data hold

3

FRONT PANEL DESCRIPTION

FIGURE 1

1-6

1-1

1-2
1-3
1-4

1-1
1-2
1-3
1-4
1-5
1-6
1-7

1-5

1-7

4

CALIBRATION

Calibration

1. Fill the D.O. meter probe head (completely) with
Electrolyte prior to using the first time. Please refer to
the Probe Maintenance section (page 10) for
instructions.

2. Prior to taking measurements, the D.O. meter should be
calibrated using the following steps.

3. Remove the red protective cover (Fig., 1-7) from the
black probe head (Fig., 1-5). *The small sponge inside
the red cover keeps the diaphragm moist with water.

4. To turn the meter on, press the Power On/Off button
(Fig., 1-2).

5. The LCD display (Fig., 1-1) will show %O
Temperature - see example below.

2

and

25.9 ºC

Wait for approximately three (3) minutes until the upper
display value stabilizes.

21.5

5

%O

2

CALIBRATION

6. Press and release the HOLD button (Fig., 1-3) - the
display will read HOLD.

7. Press and release the REC button (Fig., 1-4) - the
display will show a flashing CAL indicator and the upper
value will change to 30, then countdown to 0 (takes 30
seconds).

Flashing

8. Once the countdown has been completed, the End
indicator will be displayed momentarily, then display will
return to the normal display as shown on page 3.

CAL

30

Counts down
from 30 to 0

Perform the calibration procedure in an open and well
ventilated area to achieve the best possible results. Once
the calibration is complete the meter should read approx.

20.9 as this is the typical amount of O2 in the air.

6

MEASUREMENT PROCEDURES

Dissolved Oxygen (DO) Measurement

1. Make certain the meter has been calibrated (page 5).

2. Press and hold the Unit button (Fig., 1-3) for at least 2
seconds, the display will change from %O

3. The meter is now ready to measure.

4. To activate Automatic Temperature Compensation the
probe head (Fig., 1-5) must be immersed to a depth of
10cm. It takes several minutes for the temperature of
the probe and liquid to equalize.

5. For accurate D.O. measurement of any liquid, the probe
should be moving. Make sure that the velocity of the
movement is at least 0.2 - 0.3 m/s. This can be achieved
by shaking the probe.

Note...

To keep errors to a minimum during laboratory
measurements, use of a magnetic agitator is
recommended.

6. Rinse the probe with tap water after each measurement.

7. Re-install the probe head’s protector cover (Fig., 1-7).

2

to mg/L.

7

MEASUREMENT PROCEDURES

Temperature Measurement

1. When not in calibration mode, the meter continually
displays the temperature at the bottom left hand corner
of the LCD in either ºC or ºF.

2. Press and hold the REC button (Fig., 1-4) for at least 2
seconds to switch the temperature unit from ºC to ºF.

Note...

The temperature unit cannot be changed when the meter is
in record mode (when the REC indicator is displayed on the
LCD).

Data Hold

1. While measuring, press the Hold button (Fig., 1-3) to
hold the displayed value. The LCD will show the HOLD
symbol.

2. Press the Hold button once again to release the data
hold function.

8

MEASUREMENT PROCEDURES

Data Record (Maximum & Minimum Reading)

1. The data record function records the maximum and min­imum readings. Press the REC button (Fig., 1-4) to start
the Data Record function - the display shows REC.

2. Press the REC button: the REC MAX symbol, along with
the maximum value shows on the display.

3. Press the REC button again and the REC MIN symbol,
along with the minimum value shows on the display.

4. To exit the record function, press and hold the REC
button for a minimum of 2 seconds. The display will
return to the current reading.

9

PROBE MAINTENANCE

Initial Use

1. Unpack the DO meter and fill the probe head with the
Electrolyte (OXEL-03) fluid provided.

2. Follow the steps shown in Figure 2.

Probe Head & Fluid Maintenance

1. Whenever the DO meter will not calibrate correctly or
the DO reading is unstable, check to see if the
Electrolyte fluid is dirty or has evaporated.

2. If the Electrolyte fluid needs to be replaced, refill the
probe head (completely), following the steps shown in
Figure 2 and recalibrate the DO meter (see page 3)

3. If the fluid has been replaced and the DO meter still
does not calibrate correctly or give a stable reading,
check the probe head diaphragm for damage.

4. The Teflon diaphragm is delicate and can be damaged if
it comes in contact with solid objects or if the meter is
dropped.

10

PROBE MAINTENANCE

3. If the diaphragm is damaged replace it with one of the
spare probe heads provided with the meter.

4. Refill the new probe head with Electrolyte fluid by
following the steps shown below.

Figure 2

Fill probe head with

Electrolyte fluid.

1. Unscrew the probe head (Fig., 2-3)

2. Pour out the current Electrolyte fluid
from the probe head (unless this is the
initial use).

3. Fill the probe head (to full capacity) with
fresh Electrolyte (OXEL-03) fluid.

4. Screw the probe head back on to the
probe body.

11

2-1

2-2
2-3

SPECIFICATIONS

Display LCD size: 29mm x 28mm

Measurement &

Dissolved Oxygen: 0 to 20.0 mg/L

Range

Temperature: 0 to 50 ºC
32 to 122 ºF

Resolution Dissolved Oxygen: 0.1 mg/L

Oxygen in Air: 0.1% O2

Temperature: 0.1 ºC

Accuracy Dissolved Oxygen: ±0.4 mg/L

Oxygen in Air: ±0.7% O

2

Temperature: ±0.8 ºC/1.5 ºF

Power Off Auto shut off

Data Hold Holds the current displayed reading

Operating
Temperature

0 to 50 ºC
32 to 122 ºF

Sample Time Approx. one (1) second

Operating

Less than 80% RH

Humidity

Power Supply 4-AAA Alkaline Batteries

Weight 176g / .4LB -includes battery and

probe

12

SPECIFICATIONS

Water
Resistance

Dimension 180 x 40 x 40mm

Accessories
Included

IP-65: 0 to 50 ºC - 32 to 122 ºF
IP-67: 0 to 30 ºC - 32 to 86 ºF

8.1” x 1.9” x 1.6”

Instruction manual, spare probe head/
diaphragm set (2), Electrolyte fluid
(OXEL-03), soft carrying case and
batteries

13

BATTERY REPLACEMENT

1. Replace the batteries when the low battery icon
is displayed in the upper left corner of the LCD.
Use 4 new AAA batteries.

2. To replace the batteries, open (turn counter-clockwise)
the Battery Cover (Fig., 1-6).

3. Ensure the Battery Cover is secured after replacing the
batteries.

X

14

Sper Scientific warrants this product against

defects in materials and workmanship for a period

of one (1) years 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 of the product. In

order to obtain warranty service, simply ship the

unit postage prepaid to:

SPER SCIENTIFIC LTD.

7720 East Redfield, Suite 7

Scottsdale, AZ 85260

Email: [e-mail],

Phone: [phone]

Be sure to include your name, address, phone

number, and a detailed explanation of why you are

returning the item. Mail your warranty card within

10 days or register on line at:

www.sperscientific.com.

Revised: 5/1/2012