Sper scientific 850026 User manual

Mini Environmental
Quality Meter
850026
Eastern Energy Co., Ltd.
40/4 Vitoondumri Rd., Banbueng
Banbueng, Chonburi, Thailand
Tel: [phone]
7
[email protected].th
www.eastern-energy.com

2
Mini Environmental Quality Meter 850026
Copyright ©2012 by
Sper Scientic
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 Scientic.

3
TABLE OF CONTENTS
1. INTRODUCTION . . . . . . . . . . . . . . . . . 4
2. MATERIALS SUPPLIED. . . . . . . . . . . . . . 4
3. FEATURES . . . . . . . . . . . . . . . . . . . . 5
4. FRONT PANEL DESCRIPTION . . . . . . . . . . 6
5. OPERATING INSTRUCTIONS . . . . . . . . . . 7
Power on/off . . . . . . . . . . . . . . . . . . . . 7
LCD backlight on/off. . . . . . . . . . . . . . . . 7
Mode selection . . . . . . . . . . . . . . . . . . 7
Unit selection . . . . . . . . . . . . . . . . . . . 9
Special attention for the Humidity measurement . 9
Air ow measurement . . . . . . . . . . . . . . . 10
Hold Function . . . . . . . . . . . . . . . . . . . 10
REC (Record) function . . . . . . . . . . . . . . 11
Auto power off disable. . . . . . . . . . . . . . . 11
6. BATTERY REPLACEMENT . . . . . . . . . . . . 12
7. SPECIFICATIONS. . . . . . . . . . . . . . . . . 12
8. WARRANTY . . . . . . . . . . . . . . . . . . . . 16

4
INTRODUCTION
For environmental testing anywhere. Model 850026
combines 7 environmental test functions into a single
compact unit. Features include touch-tone buttons, min/
max and hold functions. Comes ready to use with wrist
strap, instructions, battery and soft carrying case.
MATERIALS SUPPLIED
Meter
Wristlet
CR 2032 DC 3V Battery
Soft Carrying Case

5
FEATURES
• 7 professional environmental instruments in 1
• Lightweight, ergonomic design
• Wristlet design provides extra protection to
the instrument
• Low-friction ball bearing mounted impeller design
provides high accuracy at high and low air velocity
• High precision humidity sensor with fast response time
• Built-in microprocessor circuit assures excellent
performance and accuracy
• Concise and compact buttons arrangement for
easy operation.
• Maximum and minimum memory with recall
• Hold function
• °C/°F selection

6
FRONT PANEL DESCRIPTION
3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Hold button
3-2 Button ( Power button )
3-3 REC nutton
3-4 LCD display
3-5 Wristlet
3-6 Anemometer Vane
3-7 Humdity/Temp. sensor
3-8 Battery Compartment / Cover
3-9 Buttons operation label
3-10 Anemometer Temp. sensor
3
6
4
1
7
2
3
9
8
5
1 Hold button
2 Button (Power button)
3 REC button
4 LCD display
5 Wristlet
6 Anemometer vane
7 Humidity/Temperature sensor
8 Battery compartment cover
9 Buttons operation label
www.eastern-energy.com

7
OPERATING INSTRUCTIONS
Power on/off
Button = Power Button
1. Power on: Press once to turn meter on.
2. Power off: Press for > 3 seconds to turn meter off.
LCD backlight on/off
With the meter on, press once. The LCD backlight
will light for 5 seconds, then shut off automatically.
Mode selection
This meter offers 7 selectable modes:
a. Anemometer (Air velocity) /Temp
b. Air ow (CMM, CFM)
c. Wind Chill
d. Humidity/Temp
e. Dew point Temp
f. Wet bulb Temp
g. Heat index
With the meter on, press HOLD continuously and the
Display will show the following texts in sequence:

8
Display Mode text
An = Anemometer (Air velocity) /Temp
AirFL = Air ow (CMM, CFM)
CHiLL = Wind chill
rH = Humidity/Temp
dP = Dew point Temp
_Et = Wet bulb Temp
HEAt = Heat index
When the display shows the desired mode, release
HOLD and the meter will set this mode as the default.
Anemometer (Air Velocity)/Temp Measurement
Unit Selection
REC button = Enter button
1. With the power on, press REC for >3 seconds, the
display will show Unit. Release REC, then press to
scroll through the available scales. After the desired
scale is selected, press REC to save as the default.
2. The next screen displays “dCdF” with the current
temperature scale selection (°C or °F) below.
Press to select the desired scale. Press REC to
save as the default.

9
Note…
When CHiLL, rH, dP, _Et and HEAt are the selected
mode, you may only change the temperature scale
setting. (°C or °F)
The selection scales for all modes are:
Measurement Scales
Air Velocity m/s, Km/h, mph,
knot, FPM
Temp. (Air velocity) °C/°F
Air ow CMM, CFM
Wind chill °C/°F
Temp. (Humidity) °C/°F
Dew point °C/°F
Wet bulb Temp. °C/°F
Heat index °C/°F
Note…
For the most accurate reading for the humidity/
Temp., Dew point Temp., Wet bulb Temp., Heat index
measurement, do not touch or block the humidity
sensor at any time with your hand.

10
Air ow measurement
1. With the Power on, select Air ow mode
(refer to page 9)
2. Set the measurement area dimension:
Press Hold once, the display will show HOLD
then press REC continuously until the lower left
of the Display shows m-2 or F-2
m-2 = meter square
F-2 = ft square
The unit of measure is determined by the
selected scale CMM or CFM
3. Use Hold and to adjust the air ow dimension
value. When the desired dimension value is set,
press REC to save as the default.
button = ▲button
Hold button = ▼ button
REC button = Enter button
Hold Function
Pressing Hold will freeze the current reading on the
display. The HOLD symbol will be displayed at the top
of the display window.
To release the Hold function, press Hold again, the
HOLD indicator will disappear and the current reading
will be displayed.

11
REC (Record) function
The REC (Record) function will record and display
the maximum and minimum readings.
1. Start the Record function by pressing REC once.
The REC symbol will appear on the display.
2. With the REC symbol on the display:
a. Press REC once and the Max symbol will appear on
the display along with the current maximum value.
b. Press REC again, the MIN symbol will appear on
the display along with the current minimum value.
c. Clear the recorded MAX or MIN value from the
display by pressing Hold once. The MAX/MIN
symbols and their readings, will disappear from the
display. The meter will return to the REC function
and continue recording.
d. To exit REC function press REC button for
>2 seconds.
Auto power off disable
In order to prolong the battery life, this instrument has
an Auto Power Off function: the meter will turn off if no
buttons are pressed for approximately 10 minutes.
To disable the Auto Power Off function, press REC and
enter the record function. The Auto power off function will
be disabled until the record function is exited.

12
REPLACE BATTERY
1. When the LCD display shows symbol, it is
time to replace the battery. (Measurements may
still be made for several hours after the low battery
indicator appears.)
2. Open the Battery Compartment, remove the battery.
3. Install the battery (CR2032) and replace the cover.
GENERAL SPECIFICATIONS
Display 8 mm LCD display
Measurement 1. Anemometer (Air velocity)/Temp
2. Humidity/Temp
3. CMM, CFM
4. Dew point
5. Wet bulb
6. Wind chill
7. Heat index
Operating Humidity Max. 80% RH
Operating Temperature 0 ~ 50°C (32 ~ 122°F)
Over Input Display “- - - -”
Power Supply CR 2032 DC 3V battery
Power Consumption Approx. DC 5 mA
Weight 160g (battery included)
Dim (HWD) 4.7" x 1.8" x 1.2" (120 x 45 x 20 mm)
Standard Accessories Manual, battery, soft case

13
ELECTRICAL SPECIFICATIONS
(±23 ±5°C)
Air Velocity
Unit Range Res. Acc.
ft/min 80 ~ 3927 1
≤20 m/s:±3% F.S.
>20 m/s:±4% F.S.
m/s 0.4 ~ 20.0 0.1
km/h 1.4 ~ 72.0 0.1
mph 0.9 ~ 44.7 0.1
knots 0.8 ~ 38.8 0.1
Temp.
°C/°F
0 ~ 50°C 0.1°C ± 1.2°C
32 ~ 122°F 0.1°F ± 2.5°F
ft/min: feet per minute
m/s: meters per second
km/h: kilometers per hour
mph: miles per hour
knots: nautical miles per hour

14
Humidity/Temperature
Unit Range Res. Acc.
%RH 10 to 95 %RH 0.1 % RH
< 70 %RH: ±4 %RH
≥70 %RH:
± (4% rdg +1.2 %RH)
Temp. 0~50°C 0.1°C ± 1.2°C
32~122°F 0.1°F ± 2.5°F
Air Flow
Unit Range Res.
CMM 0.024~36000 0.001/0.01/0.1/1
CFM 0.847~1271300 0.001/0.01/0.1/1/10 (x10)/100 (x100)
ELECTRICAL SPECIFICATIONS
Dew point Temp.
Unit Range Res. Remark
°C -25.3~49.0° 0.1° *Calculate from the
humidity/Temp. value
°F -13.5~120.0° 0.1°
Wet bulb Temp.
Unit Range Res. Remark
°C -5.4~49.0° 0.1° *Calculate from the
humidity/Temp. value
°F 22.2~120° 0.1°

15
Wind chill
Unit Range Res. Accuracy
°C -0.4~44.2° 0.1° ± 2.0°C
°F 15.0~112.0° 0.1° ± 3.6°F
* Wind chill value
is in effect only
when the Temp.
value <15°C and
Air velocity value
>1.4 m/s.
ELECTRICAL SPECIFICATIONS
Heat index
Unit Range Res. Accuracy
°C 0~100° 0.1° ± 2.0°C
°F 32~212° 0.1° ± 3.6°F
Effects of the heat index (shade values)
°C °F Notes
27~
32°
80~
90°
Caution: Fatigue is possible with prolonged
exposure and activity. Continuing activity could
result in heat cramps
32~
41°
90~
105°
Extreme caution:
Heat cramps, and heat exhaustion are possible.
Continuing activity could result in heat stroke
41~
54°
105~
130°
Danger:
Heat cramps, and heat exhaustion are likely; heat
stroke is probable with continued activity
54°+ 130°+ Extreme danger:
Heat stroke is imminent
*Exposure to full sunshine can increase
heat index values by up to 8°C (14°F)

16
WARRANTY
Sper Scientic warrants this product against defects in
materials and workmanship for a period of one 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 Scientic 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 void the warranty.
To obtain warranty service, ship the unit postage prepaid to:
SPER SCIENTIFIC LTD.
8281 E. Evans Rd., 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.sperscientic.com, or return your
warranty card within 10 days of purchase.
Revised 07/21/14