Sper Scientific 850025 User Manual

Mini Environmental

Quality Meter

850025

7720 E. Redeld Rd. Suite #7,

Scottsdale, AZ 85260

Tel: [phone] | Fax: [phone]

Web: www.sperscientic.com

Mini Environmental
Quality Meter 850025

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.

Sper Scientic
7720 E. Redeld Rd. Suite #7,
Scottsdale, AZ 85260
Tel: [phone]
Fax: [phone]
Web: www.sperscientic.com

2 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 . . . . . . . . 8

Special attention for the
Humidity measurement . . . 9

Hold Function . . . . . . . 10

REC (Record) function . . 10
Auto power off disable . . . 11

6. BATTERY

REPLACEMENT. . . . . . 12

7. SPECIFICATIONS. . . . . 13

8. WARRANTY. . . . . . . . 16

3

INTRODUCTION

For environmental testing
anywhere. Model 850025
combines an anemometer,
humidity meter and
thermometer 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

4 5

FEATURES

• 3 professional environmental

instruments in 1: Air velocity,
Humidity and Temperature

• 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

5

FRONT PANEL DESCRIPTION

3. FRONT PANEL DESCRIPTION

6

4

1

7

2

3

5

10

9

8

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
10 Anemometer temperature

sensor

6 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 2
selectable modes:

a. Anemometer (Air velocity)

/Temperature

b. Humidity/Temperature

With the meter on, press HOLD
continuously and the Display will
show the following texts
in sequence:

7

Display Mode text

An = Anemometer (Air velocity)/

Temperature

rH = Humidity/ Temperature

When the display shows the
desired mode, release HOLD
and the meter will set this mode
as the default.

An Mode 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

8 9

select the desired scale.
Press REC to save as
the default.

Note…

When rH is the selected mode,
you may only adjust the
temperature scale setting.
(°C or °F)

The selection scales
for all modes are:

Measurement Scales

m/s, Km/h,

Air Velocity

Temp. (Air velocity) °C/°F

Temp. (Humidity) °C/°F

mph, knot,
FPM

Note…

For the most accurate humidity
measurement, do not touch or
block the humidity sensor at any
time with your hand.

Hold Function

9

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.

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

10 11

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.

11

To disable the Auto Power Off
function, press REC and enter the
record function (page 10). The Auto
power off function will be disabled
until the record function is exited.

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
and remove the battery.

3. Install the battery (CR2032)
and replace the cover.

12 13

GENERAL SPECIFICATIONS

Display 8 mm LCD display

Measurement 1. Anemometer

(Air velocity)/
Temperature

2. Humidity/
Temperature

Operating
Humidity

Operating
Temperature

Over Input
Display

Power Supply CR 2032 DC

Power
Consumption

Weight 160 g (battery

Dim (HWD) 4.7" x 1.8" x 1.2"

Standard
Accessories

Max. 80% RH

0 ~ 50°C
(32 ~ 122°F)

“- - - -”

3V battery

Approx.
DC 5 mA

included)

(120 x 45 x 20 mm)

Instruction Manual,
battery, soft case

13

ELECTRICAL
SPECIFICATIONS

Air Velocity

Unit Range Res. Acc.

ft/min 80 ~ 3927 1

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

ft/min: feet per minute
m/s: meters per second
km/h: kilometers per hour
mph: miles per hour
knots: nautical miles per hour

0 ~ 50°C 0.1°C ± 1.2

32 ~ 122°F 0.1°F ± 2.5

±3%
F.S.

14 15

ELECTRICAL
SPECIFICATIONS

Humidity/Temperature

Unit Range Res. Acc.

< 70 %RH:
±4 %RH

%RH

10 to 95
%RH

0.1 %
RH

≥70 %RH:
± (4% rdg
+1.2 %RH)

Temp.
°C/°F

0~50 0.1°C ± 1.2°C

32~122 0.1°F ± 2.5°F

15

WARRANTY

Sper Scientic warrants this product
against defects in materials and
workmanship for a period of ve (5)
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.

To obtain warranty service, ship
the unit postage prepaid to:

SPER SCIENTIFIC LTD.
7720 E Redeld Rd, Suite 7
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 08/23/12

16 PB