Eplus BL-H1 User manual

Heat Stress Meter
with data logger &
Bluetooth
BL-H1
Instruction Manual

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TABLE OF CONTENTS
INTRODUCTION ................................... 4
FEATURES ............................................ 5
MATERIALS SUPPLIED ........................ 6
POWER SUPPLY .................................. 7
METER COMPONENTS ........................ 8
KEYPAD ................................................ 10
SETUP ................................................... 11
MEASUREMENT PROCEDURES. . . 16
DATALOGGER ...................................... 20
BATTERY REPLACEMENT ................... 23
TROUBLESHOOTING ........................... 24
PC CONNECTION ................................. 25
APPENDICES ........................................ 29
OPTIONAL ACCESSORIES .................. 31
SPECIFICATIONS ................................. 32
WARRANTY .......................................... 36

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INTRODUCTION
Eplus Heat Stress Meter with Bluetooth
(Model BL-H1) is an intelligent meter that
reads wet bulb globe temperature, wet
bulb temperature, dew point temperature,
humidity and air temperature, and black
globe temperature.
You can use the meter almost anywhere to
determine appropriate exposure levels and
meet OSHA or other safety standards for
high temperatures to avoid heat
exhaustion and heat-related injuries during
athletic events, military exercises, and
industrial activities.
This meter features a data logger. 8
Mega bite EEPROM provides
260,000 readings storage and can
be downloaded to Smart Phone via
APP.
Each data set includes the
temperature measurement (wet
bulb globe temperature, wet bulb
temperature, dew point
temperature, humidity and air
temperature or black globe
temperature) and the time and date.

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FEATURES
 Reads indoor/outdoor wet bulb globe
temperature, wet bulb temperature,
dew point temperature, humidity and
air temperature, and black globe
temperature
 8 Mege bite EEPROM datalogger
 Bluetooth
 Highly accurate microcomputer circuit
 Highly accurate Pt sensor for globe
temperature measurement
 Fast response time for humidity
measurement
 Direct measurement of the radiation
effect with a 46 mm black ball
 Sensor protecting mechanism
 Down load data to Smart phone via APP
 Internal clock and calendar
 WBGT alarm
 Built-in tabletop stand
 Maximum and minimum
 Hold function
 Auto-power-off
 Low battery indicator
 Backlight

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MATERIALS SUPPLIED
 Meter
 Black Ball with Sensor
 BL-10C 2,500mAh, 3.7V Rechargeable Li-ion Battery
 Instruction Manual

POWER SUPPLY
The unit is powered by either one 3.7V Rechargeable Li-
ion Battery or an optional type C AC adapter (5.0V/1A
output).
Battery Installation
1. Take of screw by a screw driver and remove battery
cover, located at the bottom-rear of the unit.
2. Install one 3.7V Rechargeable Li-ion Battery ensuring
the polarity is correct and the batteries are firmly
seated.
3. Re-install the cover.
Note…
When the battery voltage is low, , appears on LCD and
an alarm sounds. Plug Type C cable on to charge battery till
the full power sign , , is shown.

COMPONENTS
Front of meter Back of meter
Side of Meter

LCD DISPLAY
LCD Symbols
Indoor / Outdoor Measurement Mode
Hold/MAX/MIN Frozen/Minimum/Maximum
WBGT Wet Bulb Globe Temperature
A
IR
A
ir temperature
DP Dew point temperature
WB Wet bulb temperature
TG Globe ball temperature
RH% Relative humidity
°C (C/F) Wet bulb temperature
APO Auto Power Off
Battery Level
Charging Battery

KEYPAD
Functionality is defined as follows:
Press 3” Turns meter On and Off.
Press 1” to SET/Confirm setting
Press 1” to change
Indoor / Outdoor
Press 3” CLEAN the MAX and MIN
records
Press 1” to HOLD MAX  MIN
Press 1” DB  DP  WB  TG
Press 3” To get into setting menu
Press 1” To Light on backlight

MEASUREMENT PROCEDURES
SET Key
Press 3” to turn the meter on and off. The meter emits a
short beep and the then displays current Wet Bulb Globe
temperatures and humidity readings.
The meter starts acquiring measurements and updates its
readings every 2 seconds or the selected sampling time .
Note…
Do not hold the meter close to your face while taking
measurements because exhaling affects CO2 levels.
UP Key
Press 1” to select Indoor or Outdoor mode
RIGHT key
Press 1” to Data Hold or Change to MAX or MIN
1. Press to HOLD to freeze readings. The “HOLD” icon will
appear in the left-top corner of the LCD. All current
readings are frozen, except STEL and TWA.

2. Press again to cancel the “HOLD” function and resume
measurement
3. Press to MN/MX/AV to view minimum, maximum of
CO2, temperatures and humidity readings
4. Press 3” to CLEAN minimum and maximum records and
start to a measurement run.
LEFT Key
Air, Dew Point and Wet Bulb Temperature
Press DP/WBT to switch temperature modes. The lower left
of the LCD display cycles from air temperature to dew point
temperature to wet bulb temperature.
DOWN key
Press 1” to Light on/off the LCD backlight.

SETTING PROCEDURES
Press UP/Down key to select item or change number and
then press SET to confirm it
Press Down key 3” to get into setting menu
Power Bluetooth ON or OFF
Roll to the preferred Auto Power Off time
and confirm it.
Roll to the preferred Auto Screen Off time
and confirm it.
Preset value is 2 seconds
Roll to minute and second to adjust it
Longest sampling time is 9 minutes 59
seconds
Roll to year, month, date, hour and minute
to adjust it one by one

Roll to the preferred scale
The preset volume is 30°C , can roll to it
and adjust the value
If over setting volume, audio Beep will
alarm every 2 seconds

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Recommended heat exposure levels for
working and physical activity (permissible
heat exposure threshold):
Work/rest
regimen
Light Moderate Heavy
Continuous
work
30°C
(86°F)
26.7°C
(80°F)
25°C
(77°F)
75% work,
25% rest
30.6°C
(87°F)
28°C (82°F) 25.9°C
(78°F)
50% work,
50% rest
31.4°C
(89°F)
29.4°C
(85°F)
27.9°C
(82°F)
25% work,
75% rest
32.2°C
(90°F)
31.1°C
(88°F)
30°C
(86°F)
Source: AAGIH 1992 (The American
Conference of Governmental Industrial
Hygienists)
Wet Bulb Globe Temperature Formula
Indoor/outdoor with no sun:
WBGT = (0.7 x WB) + (0.3 x TG)
Outdoor with full sun:
WBGT = (0.7 x WB) + (0.2 x TG) + (0.1 x
TA)

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WGBT Index and Physical Exercise
WGBT Flag Activity
Intensity
< 26.7°C
( < 80°F)
White Normal activity.
Take caution.
26.7 ~ 29.4°C
(80 ~ 84.9°F)
Green Discretion is
required in
planning intense
physical activity.
29.5 ~ 31°C
(85 ~ 87.9°F)
Yellow Intense activity
for new and
non-acclimated
persons should
be curtailed.
31.1 ~ 32.2°C
(88 ~ 89.9°F)
Red Intense exercise
must be
curtailed for
those with less
than 12 weeks
training in hot
weather. Be on
high alert.
≥ 32.2°C
(≥ 90°F)
Black Cancel all
outdoor
exercise.

SPECIFICATIONS
Wet Bulb Globe Temperature
Range 0 to 50°C/ 32 to 122°F
Resolution 0.1°C/0.1°F
Accuracy 0~60°C: +/-0.3°C, others: +/-1.0°C or
32~140F°: +/-0.6, others +/-2.0°F
Air/Dry Bulb and Globe Temperature
Range -20 to 125°C/ -40 to 257°F;
Resolution 0.1°C/0.1°F
Accuracy 0~60°C: +/-0.3°C, others: +/-1.0°C or
32~140F°: +/-0.6, others +/-2.0°F;
Dew Point
Range -20 to 60°C/ -40 to 140°F
Resolution 0.1°C/0.1°F
Accuracy 0~50°C:+/-1.5°C, others: +/-3.0°C or
32.~122F°: +/-3F°., others +/-6.0°F
Wet Bulb
Range -20 to 60°C/ -40 to 140°F
Resolution 0.1
°
C/0.1
°
F
Accuracy 0~50°C:+/-1.5°C, others: +/-3.0°C or
32.~122F°: +/-3F°., others +/-6.0°F
Humidity
Range 0~100%
Resolution 1.0%
Accuracy 20 to 80%: +/-3.0%, others +/-5% @ 25°C/
77°F
Warm Up 30 seconds
Operating 0~50°C, 0~95%RH (avoid condensation)
Storage -20~60°C, 0~99%RH (avoid condensation)
Power 1pcs BL-10C 2,500mAh, 3.7V 8.9Wh,
Rechargeable Li-ion Battery, AC Adapter
Battery Life 72 hours per charge, basing on 2” sampling time
Dimensions/Weight 6½” x 3½” x 1½” (158 x 62 x 36 mm),
6.5oz(184g)

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