Precision Gold NO9AQ User manual

INSTRUCTION MANUAL
MODEL: NO9AQ
Multi-Function Environment Meter
4IN1
SOUND LEVEL
LIGHT
HUMIDITY
TEMPERATURE
CONTENTS
TITLE
1. Introduction
2. Features
3. Specifications
4. Panel layout
5. Operating instructions
6. Maintenance

1. INTRODUCTION
The 4 in 1 digital multi-function Environment Meter has been
designed to combine the functions of a Sound Level Meter, Light
Meter, Humidity Meter and Temperature Meter. It is an ideal
multi-functional test instrument with scores of practical
applications for professional and home use.
The sound level function can be used to measure noise in
factories, schools, offices, airports, home, etc., checking the
acoustics in studios, theatres and hi-fi installations.
The light function is used to measure the Lux level. It is fully
cosine corrected for the angular incidence of light. The light
sensitive component used in the meter is a very stable, long life
silicon diode.
There is a semiconductor sensor for Humidity measurements
and a K-type thermocouple for temperature measurement. This
user’s manual contains general information and specifications.
2. FEATURES
4 measuring functions: sound level, light, humidity and
temperature.
3½” large LCD display with units of Lux, °C, ºF, ˁRH and C
& dB, A & dB indication.
Easy to use
Light measuring levers ranging from 0.01 lux to 20,000 lux.
2
Sound level range:
A LO (low) – Weighting: 35-100 dB
A HI (High)- Weighting: 65-130 dB
C LO (low) – Weighting: 35-100 dB
C HI (High)- Weighting: 65-130 dB
Resolution: 0.1 dB
Humidity measurement from 25ˁRH to 95ˁRH with 0.1ˁ
RH resolution and fast time response.
Temperature measuring levers ranging from – 20.0°Cˇ
750°C /-4°Fˇ1400°F
3. SPECIFICATIONS
Display: Large 1999 counts LCD display with function of Lux ,
x10 Lux, °C, °F, %RH and dB, A & dB ,C & dB, Lo & dB, Hi & dB,
MAX HOLD, DATA HOLD indication.
Polarity: Automatic, (-) negative polarity indication.
Over-range: "OL" mark indication.
Low battery indication: The "BAT" is displayed when the
battery voltage drops below the operating level.
Measurement rate: 1.5 times per second, nominal.
Storage temperature: -10°C to 60°C (14°F to 140°F) at˘80ˁ
relative humidity
Auto Power Off: Meter automatically shuts down after approx.
10 minutes of inactivity.
Power: One standard 9V, NEDA1604 or 6F22 battery.
Dimensions/Wt.: 251.0 (H) x 63.8 (W) x 40 (D) mm/250g
Photo Detector Dimensions: 115X60X27mm
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Sound Level
Measurement range:
A LO (low) – Weighting: 35-100 dB
A HI (High)- Weighting: 65-130 dB
CLO(low)–Weighting:35-100dB
C HI (High)- Weighting: 65-130 dB
Resolution: 0.1 dB
Typical instrument frequency range: 30Hz-10KHz
Frequency Weighting: A, C –weighting
Time Weighting: Fast
Maximum Hold: Decay˘1.5dB/3 min
Accuracy: ±3.5 dB at 94 dB sound level, 1KHZ sine wave.
Microphone: Electric condenser microphone.
Light
Measuring Range: 20, 200, 2000, 20,000lux
(20,000lux range reading x10)
Overrate Display: Highest digit of "1" is displayed.
Accuracy: ±5 ˁrdg ˇ10 dgts (calibrated to standard
incandescent lamp at color temperature 2856k).
Repeatability:±2ˁ.
Temperature Characteristic: ±0.1ˁ/°C
Photo detector: One silicon photo diode with filter.
Humidity/Temperature
Measurement Range:
Humidity 25ˁ95ˁRH
Temperature -20.0°Cˉˇ50.0°C -4°Fˉˇ122°F
(K-type) -20.0°Cˉˇ200.0°C -20°Cˉˇ750°C;
4
-4.0°Fˉˇ200°F, -4°Fˉˇ1400°F.
Resolution: 0.1ˁRH, 0.1°C, 1°C / 0.1°F, 1°F.
Accuracy (after calibration):
Humidity: ±5ˁRH (at 25°C , 35ˁ95ˁRH)
Response time of the humidity sensor: approx. 6min.
Temperature:
±3%rdg±2°C (at-20.0°C+200.0°C)
±3.5%rdg±2°C (at-20.0°C+750°C)
±3%rdg±2°F (at-4.0°F+200.0°F)
±3.5%rdg±2°F (at-4°F+1400°F)
Input Protection: 60V dc or 24V ac rms.
4. PANEL DESCRIPTION
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6
1. LCD display: 3½” digits with units of Lux, x10 Lux, °C,°F,%RH,
dB, A, C, Lo, Hi and low battery "BAT" MAX HOLD, DATA HOLD
indication.
2. Power Button: Switches unit ON or OFF.
3. Selection Button: Selects Functions and ranges.
4. MAX HOLD: If you press the MAX button, the maximum reading
will be held. Pressing the button again releases the hold and allows
further measurements.
5. DATA HOLD: The reading will be held when the Data Hold button
is pressed. If the button is pressed again, this will release the hold and
allow further measurements.
6. Function Switch: Selects measurement functions of Lux,
Temperature, Humidity and Sound Level.
7. Microphone: Electric condenser microphone.
8. Photo Detector: Long life silicon photo diode.
9. Humidity and Temperature: Humidity Sensor and Semiconductor
Sensor.
10.
Temperature Terminal: Insert the temperature probe in this terminal.
5. OPERATING INSTRUCTION
5
Measuring Sound Level
1. Turn the function Switch to "dB" position.
2. Point the microphone at the sound source in a horizontal position.
3. Press Select Button: Selects A & dB, C & dB, Lo & dB and Hi & dB.
4. The A, C-weighting curve is nearly uniform over the frequency range
form 30 to 10kHz, thus giving an indication of overall Sound level.
5. The fast response is suitable to measure short bursts and peak values
from the sound source.
6. The sound level will be displayed.
7. Note: Strong winds (over 10m/sec.) can cause mis-readings in
measurements. In these conditions a wind-screen should be used in
front of microphone.
Measuring Light
1. Turn the function switch to select "Lux"
2. Point the photo detector towards the light source in a horizontal
position.
3. Pressing the select button, selects 20, 200, 2000, 20,000 LUX ranges.
4. Read the illuminance from the LCD display.
5. Over-range: If the instrument only displays "1" in the M.S.D. the
input signal is too strong, and a higher range should be selected.
6. When the measurement is completed, remove the photo detector
from the light source.
7. Spectral sensitivity characteristic: To the detector, the photo diode
with filters makes the spectral sensitivity characteristic almost meet
C.I.E. (International Commission on Illumination) photopia curve V
(¬) as the following chart described.
100%(Relative Sensitivity Spectral Sensitivity
80% V(Ȝ)
60%
40%
20%
0
400 500 600 700
Wavelength (nm)

8. Recommended Illumination:
Locations
*Office
Conference, Reception room.
Clerical work
Typing drafting
*Factory
Packing work, Entrance passage
Visual work at production line
Inspection work
Electronic parts assembly line
*Hotel
Public room, Cloakroom
Reception, Cashier
*Store
Indoors Stairs Corridor
Show window, Packing table
Forefront of show window
*Hospital
Sickroom, Warehouse
Medical Examination room
Operation room
Emergency Treatment
*School
Auditorium, Indoor Gymnasium
Class room
Laboratory Library Drafting room,
Lux
200 ~ 750
700 ~ 1,500
1000 ~ 2,000
150 ~ 300
300 ~ 750
750 ~ 1,500
1500 ~ 3,000
100 ~ 200
200 ~ 1,000
150 ~ 200
750 ~ 1,500
1500 ~ 3,000
100 ~ 200
300 ~ 750
750 ~ 1,500
100 ~ 300
200 ~ 750
500 ~ 1,500
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Measuring Humidity/Temperature
1.Humidity Measurement:
ķ Set the function Switch to "%RH" position.
ĸ Then the display will show the humidity reading value
(%RH) directly.
Ĺ When the tested environment humidity value changed. It
need to a few minutes to get the stable "%RH" reading.
Warning:
Don't expose the humidity sensor to direct sunlight.
Don't touch or manipulate the humidity sensor.
2.Temperature Measurement:
ķ Set the function Switch to "TEMP"
ĸ Press Select Button: Selects "0.1°C or 1ćand 0.1°F or 1°F "
range.
Ĺ The display will show the temperature reading value (°C /°F)
ĺ Insert the temperature probe into the K-type thermocouple
socket.
Ļ Touch the end of the temperature sensor onto the area or
surface of the object to be measured. The display will show
the temperature reading value (°C /°F).
Warning:
Never attempt a voltage measurement with the test leads inserted into
the K-type thermocouple socket. This may cause injury or damage to
the meter.
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6. MAINTENANCE
Battery Replacement
If the sign "BAT" appears on the LCD display, it indicates that the
battery should be replaced. Open the battery case and replace
the battery with 1 x 9V battery (Order code YA12N)
Patent Pending
Maplin Electronics Ltd
Brookfields Way, Manvers
Wath-Upon-Dearne
Rotherham, S63 5DL
www.maplin.co.uk