Lutron Electronics EM-1910 User manual

Sound level, 7 in 1
ENVIRONMENT METER
Model : EM-1910
Your purchase of this
ENVIRONMENT METER.
7 in 1 . marks a
step forward for you
into the field of
precision measurement.
Although this Meter is a
complex and delicate
instrument, its durable
structure will allow
many years of use if
proper operating
techniques are
developed. Please read
the following
instructions carefully
and always keep this
manual within easy
reach.
OPERATION MANUAL

TABLE OF CONTENTS
1. FEATURES..................................................................................................................
1
2. SPECIFICATIONS......................................................................................................
2
3. FRONT PANEL DESCRIPTION......................................................................
6
3-1 Hold button.....................................................................................................................
6
3-2 button ( Power button )............................................................................................
6
3-3 REC button......................................................................................................................
6
3-4 LCD display.......................................................................................................................
6
3-5 Wristlet............................................................................................................................
6
3-6 Light Sensor.............................................................................................................................
6
3-7 Sound level meter sensor ( Mic )............................................................................................................
6
3-8 Humidity/Temp. sensor.........................................................................................................
6
3-9 RS-232 socket..............................................................................................................
6
3-10 Battery Compartment / Cover..........................................................................................
6
3-11 Button operation label.......................................................................................................
6
3-12 Type K probe socket...............................................................................................
6
3-13 Tripod Fix Nut...............................................................................................
6
4. MEASURING PROCEDURES......................................................................................................
7
4-1 Power on/off....................................................................................................................
7
4-2 LCD backlight on/off.........................................................................................................
7
4-3 Function selection............................................................................................................
7
4-4 Unit selection....................................................................................................................
8
4-5 Reverse the Display direction automatically...................................................................................
9
4-6 Special attention for the Humidity measurement................................................................................
10
4-7 Sound level measurement.........................................................................................................................
10
4-8 Hold Function.......................................................................................................
11
4-9 REC ( Record ) function...................................................................................................
#
4-10 Auto power off disable........................................................................................................................................
#
4-11 Type K Temp. measuremen................................................................................
#
5. RS232 PC SERIAL INTERFACE........................................................................................................
#
6. BATTERY REPLACEMENT........................................................................................................
#
7. Optional Type K Temp. Probe......................................................................................................
#

1. FEATURES
* 7 in 1 professional environment instruments:
1. Sound level meter., 2. Humidity/Temp., 3. Light meter
4. Dew point, 5. Wet bulb,
6. Heat index, 7. Type K Temp.(optional probe)
* Tiny bone shape with light weight and small size case
design are suitable for handling with one hand.
* Wristlet design provides extra protection to the
instrument especially for user one hand operation.
* High precision humidity sensor with fast response time.
* Built- in microprocessor circuit assures excellent
performance and accuracy.
* Concise and compact buttons arrangement,
easy operation.
* Memorize the maximum and minimum value with recall.
* ℃/℉ detection by pressing button on the front panel.
* Hold function to freeze the current reading value.
1

2. SPECIFICATIONS
2-1 General Specifications
Display 14 mm LCD display
Measurement 1. Sound level meter.
2. Humidity/Temp.
3. Dew point
4. Wet bulb
5. Heat index
6. Light meter
7. Type k Temp.( optional )
Operating Max. 80% RH.
Humidity
Operating 0 to 50 ℃ ( 32 to 122 ℉ )
Temperature
Over Input Indication of "- - - - "
Display
Power Supply UM4-AAA X 3 ( DC 4.5 V battery )
Power Approx. DC 18 mA
Consumption
Weight 146 g (w/o Battery)
Dimension HWD 179 x 57 x 24 mm (7.0 x 2.2 x 0.94 inch).
Standard Instruction Manual
Accessory
Optional Type K Temp. probe : TP-01 , TP-02A ,TP-03 , TP-04
Accessories
2

2-2 Electrical Specification ( 23 ±5℃ )
Sound level meter.
Measurement 35 - 130 dB.
Range
Resolution 0.1 dB.
Function Data hold
Record ( Max., Min. ).
Accuracy Characteristics of "A" frequency weighting network
(23 ±5 ℃) meet IEC 61672-2013 class 2 Under 94 dB input
signal, the accuracy are :
31.5 Hz ±3.0 dB
63 Hz ±2.0 dB
125 Hz ±1.5 dB
250 Hz ±1.5 dB
500 Hz ±1.5 dB
1 K Hz ±1.0 dB
2 K Hz ±2.0 dB
4 K Hz ±3.0 dB
8 K Hz ±5.0 dB
Remark :
The above spec. are tested under the
environment RF Field Strength less
than 3 V/M & frequency less than 30
MHz only.
Frequency 31.5 to 8,000 Hz.
Microphone type Electric condenser microphone.
Microphone size Out size, 12.7 mm DIA. ( 1/2 inch).
3

Humidity/Temp.
Unit Range Resolution Accuracy
% RH 10 to 95 %RH 0.1 %RH < 70% RH :
±4 %RH
≧ 70% RH :
±( 4 %rdg +1.2 %RH)
Temp. 0 to 50 ℃ 0.1 ℃ ±1.2 ℃
32 to 122 ℉ 0.1 ℉ ±2.5 ℉
Light * auto range
Unit Range Resolution Accuracy
Lux 0 to 2,200 Lux 1 Lux ±5% rdg ±8 dgt
1,800 to 20,000 Lux 10 Lux
Ft-cd 0 to 204.0 Fc 0.1 Ft-cd
170 to 1,860 Fc 1 Ft-cd
Remark : Ft-cd : feet candle
Dew point Temp.
Unit Range Resolution Remark
℃ -25.3 to 49.0 ℃ 0.1 ℃ * Calculate from the
℉ -13.5 to 120.0 ℉ 0.1 ℉ humidity/Temp. value
Please refer to http://en.wikipedia.org/wiki/Dew_point
Wet bulb Temp.
Unit Range Resolution Remark
℃ -5.4 to 49.0 ℃ 0.1 ℃ * Calculate from the
℉ 22.2 to 120 ℉ 0.1 ℉ humidity/Temp. value
Please refer to http://en.wikipedia.org/wiki/Wet-bulb_temperature
4

Heat index
Unit Range Resolution Accuracy
℃ 0 to 100.0 ℃ 0.1 ℃ ±2.0 ℃
℉ 32 to 212 ℉ 0.1 ℉ ±3.6 ℉
Pleas refer to http://en.wikipedia.org/wiki/Heat_index
Type K/J thermometer
Sensor Resolution Range Accuracy
Type
Type K 0.1 ℃-50.0 to 1300.0 ℃± ( 0.4 % + 0.5 ℃ )
-50.1 to -100.0 ℃± ( 0.4 % + 1 ℃ )
0.1 ℉-58.0 to 2372.0 ℉± ( 0.4 % + 1 ℉ )
-58.1 to -148.0 ℉± ( 0.4 % + 1.8 ℉ )
Effects of the heat index (shade values)
Celsius Fahrenheit 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
over 54 ℃ over 130 ℉ Extreme danger : Heat stroke is imminent
Note :
Exposure to full sunshine can increase heat index values by up to
8 ℃ ( 14℉ ).
5

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Hold button
3-2 Button ( Power button )
3-3 REC Button
3-4 LCD display
3-5 Wristlet
3-6 Lux Light Sensor
3-7 Sound level sensor ( mic )
3-8 Humidity/Temp. sensor
3-9 RS-232 socket
3-10 Battery Compartment / Cover
3-11 Battery Cover Screws
3-12 Type K probe socket
3-13 Tripod Fix Nut
6

4. MEASURING PROCEDURE
4-1 Power on/off
Button = Power Button
1) Power on :
Press " Power Button " once.
2) Power off :
During power on, press " Power Button " > 3 seconds.
will power off.
4-2 LCD backlight on/off
During power on, press " Power Button " once, then the
LCD backlight will be on 5 seconds then off automatically,
4-3 Function selection
The meter can select 7 kind function as :
a. Sound level meter
b. Humidity/Temp.
c. Dew point Temp.
d. Wet bulb Temp.
e. Heat index
f. Light meter
g. Type K Temp.( optional )
7

During power on, press the " Hold button "
continuously ( not release the button ), the Display will
show the following text in sequence :
Display Function
text
db Sound level meter
rH Humidity/Temp.
dP Dew point
_Et Wet bulb Temp.
HEAt Heat index
LigHt Light meter
tYPE Type K Temp.( optional )
Until the Display show the desired function, just
release the " Hold button " , the meter will execute this
function with default.
4-4 Unit selection
1) During power on, press the " REC button "
continuously > 3 seconds, the Display will show the text
" Unit " release the " REC button ", then press " button "
to select the desired unit, after the desired unit
is selected, press the " REC button " to save the unit
with default.
REC button = Enter button
8

The selection unit for all function are :
Measurement Unit
Sound level meter dB
Humidity %RH
Temp. ( Humidity ) ℃, ℉
Dew point ℃, ℉
Wet bulb Temp. ℃, ℉
Heat index ℃, ℉
Light meter Lux, Ft-cd * auto range
Type K Temp. ℃, ℉
4-5 Reverse the Display direction automatically
As intend to match the sensor convenient position, Light
sensor should put on the top case side to prevent when
hand hold the case may interrupt the sensor, the Display
direction for Light measurement will reverse automatically.
9

4-6 Special attention for the Humidity
measurement
Attention :
Intend to get the precision
reading, for the Humidity /
Temp. , Dew point Temp., Wet
bulb Temp., Heat index
measurement, the hand or
fingers do not touch ( or stay
away ) the Humidity sensor
( 3-8, Fig. 1 ).
Remark :
As for the convenience of going to the sensor position,
The humidity sensor should be placed under the top case side,
so as to prevent when Hold the case will not affect the
humidity sensor detector , if want to change display Direction ,
perform the following actions
Press "hold button "once, then Press"power button "once.
4-7 Sound level measurement
1) Power on, select the function to " Sound level measurement "
( refer to chapter 4-3 ), now the meter is ready for Sound
level measurement.
10

4- 8 Hold Function
Whenever press the " Hold Button " will freeze the current
reading value with a "HOLD" symbol on the display.
To release the Hold function, just press the " Hold button "
once again, the " HOLD " indicator will be disappeared.
* During execute the " REC function ", the Hold function is disable.
4-9 REC ( Record ) function
1) The REC ( Record ) function can record and display
the maximum and minimum reading values. Start the
Record function by pressing the " REC Button " once.
There will be a " REC " symbol on the display.
2) With the REC symbol on the display :
(a) Press the " REC button " once and the " Max "
symbol along with the maximum value will appear on
the display.
(b) Press the " REC button " again, the " MIN " symbol
along with the minimum value will appear on the display.
(c) To exit the memory record function, press the " REC
button " continuously for at least 2 seconds. The display
will revert to the current reading.
(d) Clear the recorded MAX or MIN value by pressing the
" Hold button " once. Previous recorded
MAX/MIN value will be given up and then revert to the
REC. function keep on recording.
4- 10 Auto power off disable
In order to prolong the battery life, the instrument has
"Auto Power Off " function. The meter will switch off
automatically if no buttons are pressed for around 10
minutes.
However if intend disable the " Auto power off " function,
just execute the " REC " function ( above chapter 4-10 ),
then the Auto power off function will be canceled.
11

4-11 Type k Temp. measurement
1) Insert the plug of the optional Type K Temp.
probe, TP-01 into the " Type K probe socket "
( 3-12, Fig. 1 ).
2) Power on the meter, select the function to " Type K
Temp. " ( refer to chapter 4-3 ), now the meter is
ready for Type K Temp. measurement.
5. RS232 PC SERIAL INTERFACE
The instrument has RS232 PC serial interface via a 3.5
mm terminal ( 3-10, Fig. 1 ).
The data output is a 16 digit stream which can be
utilized for user's specific application.
A RS232 lead with the following connection will be
required to link the instrument with the PC serial port.
Meter PC
(9W 'D" Connector)
Center Pin............................................
Pin 4
(3.5 mm jack plug)
Ground/shield...........................................
Pin 2
2.2 K
resistor
Pin 5
12

The 16 digits data stream will be displayed in the
following format :
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each digit indicates the following status :
D0 End Word
D1 & D8 Display reading, D1 = LSD, D8 = MSD
For example :
If the display reading is 1234, then D8 to
D1 is : 00001234
D9 Decimal Point(DP), position from right to the
left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D10 Polarity
0 = Positive 1 = Negative
D11 & D12 Annunciator for Display
℃ = 01 ℉ = 02 % RH = 04
Lux = 15 dB = 17 Ft-cd = 16
D13 When send the upper display data = 1
When send the lower display data = 2
D14 4
D15 Start Word
RS232 FORMAT : 9600, N, 8, 1
Baud rate 9600
Parity No parity
Data bit no. 8 Data bits
Stop bit 1 Stop bit
13

6. BATTERY REPLACEMENT
1) When the LCD display shows " " symbol, it is
necessary to replace the battery. However
measurement may still be made for several hours after
the low battery indicator appears.
2) Open the " Battery Compartment / Cover " ( 3-10, Fig. 1 )
and remove the battery.
3) Install the battery ( UM4-AAA DC1.5 V x 3 ) and then reinstate
the cover.
7. Optional Type K Temp. probe
(Type K) TP-01 * Max. short-term operating
Temperature: 300 ℃ (572 ℉).
* It is an ultra fast response
naked-bead thermocouple
suitable for many general purpose
application.
Thermocouple * Measure Range: -50 ℃ to 900 ℃,
Probe -58 ℉ to 1650 ℉.
(Type K), TP-02A * Dimension:12cm tube, 3.2mm Dia.
Thermocouple * Measure Range: -50 ℃ to 1100 ℃,
Probe -58 ℉ to 2012 ℉.
(Type K), TP-03
* Dimension: 13.6cm tube, 8mm Dia.
Surface Probe * Measure Range: -50 ℃ to 400 ℃,
(Type K), TP-04 -58 ℉ to 752 ℉.
* Size :
Temp. sensing head - 15 mm Dia.
Probe length - 120 mm.
14 191017-EM1910