Dissolved Oxygen Pen
850045
Dissolved Oxygen Pen - 850045
Copyright ©2015 by Sper Scientific
ALL RIGHTS RESERVED
Printed in the USA
The contents of this manual may not be reproduced or transmitted in any
form or by any means electronic, mechanical, or other means that do not
yet exist or may be developed, including photocopying, recording, or any
information storage and retrieval system without the express permission
from Sper Scientific.
TABLE OF CONTENTS
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FRONT PANEL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MEASUREMENT PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PROBE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
BATTERY REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2
FEATURES
• Heavy duty polarographic
D.O. probe including
temperature sensor
• Automatic Temperature
Compensation
• Microprocessor assures
high accuracy
•D
ual display LCD
• Auto power off
• IP65 water resistance.
• Maximum and Minimum
• Data hold
FRONT PANEL DESCRIPTION
1
2
1. Battery Compartment & Cover
2. Display
3. Power Button
4. HOLD / Unit Button
5. REC / °C/°F Button
6. Probe Head & Protection Cover
3
4
5
6
3
CALIBRATION
1. F
ill 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. P
rior to taking measurements, the D.O. meter should be calibrated
using the following steps.
3. Remove the red protective cover from the black probe head. *The small
sponge inside the red cover keeps the diaphragm moist with water.
4. T
o turn the meter on, press the POWER ON/OFF button.
5. The LCD display will show %O2 and Temperature - see example below.
Wait for approximately three (3) minutes
until the upper display value stabilizes.
21.5
25.9 ºC
%O2
6. Press and release the HOLD button - the display will read HOLD.
7. P
ress and release the REC button - the display will show a flashing
CAL indicator and the upper value will change to 30, then countdown
to 0 (takes 30 seconds).
Flashing
CAL
30
Counts down
f rom 30 to 0
8. Once the countdown has been completed, the End indicator will be
displayed momentarily, then display will return to the normal display
as shown in step 5.
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.
4
MEASUREMENT PROCEDURES
Dissolved Oxygen (DO) Measurement
1. Make certain the meter has been calibrated (page 4).
2. Press and hold the UNIT button for at least 2 seconds, the display
will change from %O2 to mg/L.
3. The meter is now ready to measure.
4. To activate Automatic Temperature Compensation the probe head
must be immersed to a depth of 3 cm. 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.
Temperature Measurement
1. W
hen 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. P
ress and hold the REC button 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. W
hile measuring, press the HOLD button to hold the displayed value.
The LCD will show the HOLD symbol.
2. P
ress the HOLD button once again to release the data hold function.
5
Data Record (Maximum & Minimum Reading)
1. T
he data record function records the maximum and minimum readings.
Press the REC button to start the Data Record function - the display
shows REC.
2. P
ress 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. T
o exit the record function, press and hold the REC button for a
minimum of 2 seconds. The display will return to the current reading.
PROBE MAINTENANCE
Initial Use
1. U
npack the DO meter and fill the probe head with the Electrolyte
(OXEL-03) fluid provided.
2. F
ollow the steps shown in Figure 2.
Probe Head & Fluid Maintenance
1. W
henever 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 4).
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. T
he Teflon diaphragm is delicate and can be damaged if it comes
in contact with solid objects or if the meter is dropped.
5. If the diaphragm is damaged replace it with one of the spare
probe heads provided with the meter.
6. Refill the new probe head with Electrolyte fluid by following the
steps shown below.
6
Figure 2
1. U
nscrew the probe head.
2. P
our 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 fluid.
4. S
crew the probe head back on to the probe body.
BATTERY REPLACEMENT
1. R
eplace 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.
3. Ensure the Battery Cover is secured after replacing the batteries.
7
SPECIFICATIONS
Display
LCD size: 29mm x 28mm
Measurement
& Range
Dissolved Oxygen: 0 to 20.0 mg/L
Temperature: 0 to 50 ºC (32 to 122 ºF)
Dissolved Oxygen: 0.1 mg/L
Resolution
Oxygen in Air: 0.1% O2
Temperature: 0.1 ºC
Dissolved Oxygen: ±0.4 mg/L
Accuracy
Oxygen in Air: ±0.7% O2
Temperature: ±0.8 ºC/1.5 ºF
Power Off
Auto shut off
Data Hold
Holds the current displayed reading
Operating Temp.
0 to 50 ºC (32 to 122 ºF)
Sample Time
Approx. one (1) second
Operating RH
Less than 80% RH
Power Supply
4-AAA Alkaline Batteries
Water
Resistance
IP-65: 0 to 50 ºC - 32 to 122 ºF
IP65: 0 to 30 ºC - 32 to 86 ºF
Dimensions
7¾" × 1½" × 1½" (197 × 38 × 38 mm)
Weight
4.1 oz (116 g)
WARRANTY
Sper Scientific warrants this product against defects in materials and
workmanship for a period of one (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,
battery leakage, or damage resulting from accident, tampering, misuse,
or abuse of the product. Opening the meter to expose its electronics will
break the waterproof seal and void the warranty.
To obtain warranty service, ship the unit postage prepaid to:
SPER SCIENTIFIC LTD.
8281 East Evans Road, Suite #103
Scottsdale, AZ 85260
The defective unit must be accompanied by a description of the
problem and your return address. Register your product online at
www.sperwarranty.com within 10 days of purchase.
8
rev. 2/9/2017
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