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User Manual
EM400
7-in-1 Environmental Meter w/Sound
Introduction
Thank you for selecting the Triplett EM400 Environmental Meter. This
instrument measures Sound Level (dBA) Light, Relative Humidity % with
Air temperature, Dew Point temperature, Web bulb temperature, Type K
temperature (external probe), and Heat Index temperature,. The backlit
LCD includes primary and secondary displays plus a variety of intuitive
status indicators
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Features
• Professional environmental meter with programming menu for usercustomization
• Selectable units of measure
• Sound Level readings
• Light measurements in Foot candle and LUX units
• Environmental measurements: Relative humidity % with air
temperature, Dew point temperature, Wet bulb temperature, Heat
Index temperature, and Type K temperature (with external probe
connected)
• MAX-MIN Recording
• Display Hold freezes displayed reading for convenience
• Compact, light-weight, easy-to-use, ergonomic design with lanyard
• Backlit LCD automatically reverses orientation to match selected sensor
mode
Description
METER DESCRIPTION
1. Sound Level Microphone
2. Type K Thermocouple Input
3. LCD Display
4. Display Hold / Mode Button
5. Light Sensor
6. Humidity/Temperature sensors
7. Power/Backlight button
8. MAX-MIN Record/Enter Button
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Operation
Meter Power
1. Three (3) 1.5V ‘AAA’ batteries power the meter. The battery
compartment is located on the rear of the meter secured by one
flat head screw.
2. Short press the power button to switch the meter ON. The
meter will begin displaying readings for the mode selected.
3. Long press the power button to power OFF the meter.
Auto Power OFF (APO)
In order to conserve battery life, the meter will automatically switch
off after approximately 10 minutes of inactivity. Note that APO does
not function while the meter is in the MAX -MIN Recording mode
(short press the R button to access the MAX-MIN Recording mode).
Selecting the Operating Mode
Long press the M (Mode) button to scroll through the list of functions.
When the desired mode is displayed, release the button. See display
icons with brief descriptions below:
• dbSound Level(dBA)
• rHRelative Humidity in % and Air temperature
• dPDew point temperature
• _EtWet bulb temperature
• HEATtHeat index temperature
• LigHtLight intensity measurements
• tYPEType K thermocouple temperature (must attach thermocouple
to meter)
•
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Changing the Units of Measure
Press and hold the R button until the word ‘Unit’ appears.
Now short press the power button to change the units for the
selected measurement mode.
Short press to save the selection and move to the
secondary function, if applicable (temperature, for example).
Short press the power button to change the secondary function
units, if applicable, and then short press to save.
See units list below:
o Sound dB
o Temperature units oC, oF (for air, dew point, wet bulb,
heat index, and Type K)
o Light units Foot-candles, LUX
Reversible Backlight LCD
The LCD display automatically reverses its presentation
orientation depending on measurement mode. This is to match the
display orientation with the selected sensor mode (light or
environmental measurements such as Wet bulb temperature).
The LCD is equipped with backlighting for easier viewing,
especially in dimly lit areas. With the meter powered ON, short
press the power button to turn ON the backlight. The backlight will
power OFF after several seconds.
Display Hold
Short press the H (Hold) button to freeze and unfreeze the displayed
reading. The Display Hold mode is not operational when using the MAXMIN Recording mode.
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MAX-MIN Record Mode
In this mode, the meter records the maximum and minimum readings
over time.
Short press the R (Record) button to start recording MAX/MIN
readings.
Now use short presses of the R button to toggle MAX and MIN reading
displays.
Short press the H button to reset MAX and MIN memories.
Press and hold the R button to exit the Recording mode.
Measurement Modes
Sound Level Measurement
1. With the meter ON, press and hold the M (Mode) button until ‘db’
is displayed; then release the button.
2. The meter will stard measuring the sound in dB.
Light Measurements
Press and hold the M button until ‘LigHt’ is displayed; then release.
Hold the meter so that the source of light fully encompasses the light
sensor dome.
View the light reading on the LCD (light readings are displayed in
reverse orientation).
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Type K /Relative Humidity/Dew point/Wet
bulb/Heat index Measurements
Press and hold the M button until the desired function is displayed:
; rH Relative Humidity (with air temperature); dP Dew point; _Et Wet bulb;
HEAt Heat index; tYPE Type K thermocouple temperature (attach
thermocouple to meter)
Place the meter or type K probe in the measurement area and view the
readings on the LCD.
Maintenance
Battery Replacement
When the low battery icon appears on the display please replace
the batteries as described below.
Safety: Please dispose of batteries responsibly; never dispose of batteries
in a fire, batteries may explode or leak. If the meter is not to be used for
60 days or more, remove the batteries and store separately.
1. Remove power from the meter.
2. Remove the flat head screw that secures the battery
compartment at the back of the meter.
3. Open the battery compartment and replace the three (3) 1.5V
‘AAA’ batteries observing correct polarity. Re-assemble the
meter before use.
Never dispose of used batteries or rechargeable batteries in
household waste.
As consumers, users are legally required to take used
batteries to appropriate
collection sites, the retail store where the batteries were
purchased, or wherever batteries are sold.
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Disposal: Do not dispose of this instrument in household
Display
Backlit LCD 3.0 x 3.5 cm (1.18 x 1.38”)
Sound Level
Electric condenser microphone.
Light sensor
Cosine/color-corrected photo-diode
Air Temperature
sensor
PT1K ohm RTD
(internal sensor)
Relative Humidity
sensor
Capacitance
sensor
Measurements
Sound Level, Relative Humidity with Air
Temperature, Light, Dew Point, Wet Bulb,
Heat
Index, and Type K Temperature (requires
external thermocouple)
Tripod mount
On rear of meter
Operating
Humidity
80% RH Max
Operating
Temperature
0 to 50°C (32 to
122°F)
waste. The user is obligated to take end-of-life devices to a
designated collection point for the disposal of electrical and
Cleaning and Storage
electronic equipment.
Periodically wipe the case with a damp cloth and mild
detergent; do not use abrasives or solvents. Do not allow
moisture to come in contact with any of the sensors.
Specifications
General
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Over Limit
Display
“----“
Power Supply
3 x 1.5V AAA
batteries
Power
Consumption
Approximately
18mA DC
Weight
160g (5.6oz)
Dimensions
(HxWxD)
179x 58x 25mm (7.0 x 2.3 x 1.0 inch)
Sound Level (dBA) Meter
Measurement 35 - 130 dB.
Range
Resolution 0.1 dB.
Function Data hold
Accuracy Characteristics of "A" frequency weighting network
(23 ±5 ℃) meet IEC 61672-2013 class 2 Under 94 dB input
The above spec. are tested under the
Environment RF Field Strength <
than 3 V/M & frequency less than 30 MHz only.
Record ( Max., Min. ).
signal, the accuracy is :
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Frequency 31.5 to 8,000 Hz.
%RH
10 to 95
0.1
±(4%RH) @ < 70%RH
±(4%rdg +1.2%RH) @ >
70%RH
°C
0 to 50
0.1
±1.2°C
°F
32 to 122
0.1
±2.5°F
Light (automatic ranging)
Lux
0 to 2,200
1
1,800 to 20,000
10
±(5%rdg + 8dgts)
Ft-cd
0 to 204.0
0.1
170 to 1,860
1
Dew Point Temperature
Unit
Range
Resolution
Accuracy
°C
-25.3 to 49.0
0.1
Calculated from
temperature and
°F
-13.5 to 120.0
0.1
humidity readings
Wet Bulb Temperature
°C
-5.4 to 49.0
0.1
Calculated from
temperature and
°F
22.2 to 120
0.1
humidity readings
Heat Index
Microphone type Electric condenser microphone.
Microphone size Out size, 12.7 mm DIA. ( 1/2 inch).
Relative Humidity plus Air Temperature
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°C
0 to 100.0
0.1
±2.0°C
°F
32 to 212
0.1
±3.6°F
Exposure to direct sunlight can increase heat index readings by 8oC (14oF)
Type K Thermometer
°C
-50.0 to 1300.0
0.1
±(0.4% + 0.5°C)
-50.1 to -100.0
±(0.4% + 1°C)
°F
-58.0 to 2372.0
0.1
±(0.4% + 1°F)
-58.1 to -148.0
±(0.4% + 1.8°F)
Accuracy is stated for meter only. Additional error is introduced by the external
Triplett / Jewell Instruments extends the following warranty to the original purchaser of
these goods for use. Triplett warrants to the original purchaser for use that the products
sold by it will be free from defects in workmanship and material for a period of (1) one
year from the date of purchase. This warranty does not apply to any of our products
which have been repaired or altered by unauthorized persons in any way or purchased
from unauthorized distributors so as, in our sole judgment, to injure their stability or
reliability, or which have been subject to misuse, abuse, misapplication, negligence,
accident or which have had the serial numbers altered, defaced, or removed.
Accessories, including batteries are not covered by this warranty
Copyright © 2021 Triplett
www.triplett
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