TENMARS TM188 User guide

HEAT STRESS WBGT

METER

TM-188 / TM-188D

User’s

Manual

HB2TM1880002

TENMARS ELECTRONICS CO., LTD

1. Preface ..................................................... 2

2. General Description.................................. 2

3. Specifications (23℃±5℃)......................... 4

4. Instrument Description.............................. 8

5. LCD Description........................................ 9

6. Power On/Off.......................................... 10

7. Auto Power Off........................................ 10

8. Alarm On/Off........................................... 10

9. Disable Auto Power Off............................11

10. LED Backlight ..........................................11

11. Temperature Unit .....................................11

12. Mode....................................................... 12

13. Data Hold................................................ 13

14. Single Data Record................................. 13

15. Viewing Data Records ............................ 14

16. AUTO DATALOGGER(TM-188D)........... 15

17. Maximum/Minimum (MAX/MIN).............. 16

18. USB (TM-188D)...................................... 16

19. Setting and Calibration............................ 17

20. Thermal hazard prevention standards .... 24

21. Precautions............................................. 25

22. Software installation (TM-188D).............. 25

23. External DC power.................................. 26

24. Safety and maintenance standards......... 26

25. Battery replacement................................ 27

26. End of life................................................ 28

TM-188/TM-188D

1. Preface

Thank you for purchasing our product.
Please, read the operating instructions in details
before you use this HEAT STRESS WBGT meter,
so you will operate the meter correctly. This meter
can be operated in industry and home.

WARNING

Non-compliance warning and/or
operating instructions may damage the
instrument or its parts or injuring the
operator.

2. General Description

 Quick-response capacitance sensor.

Accurate measurement for wet bulb globe
temperature(WBGT), black globe
temperature(TG), humidity(%RH), air
temperature(TA),wet bulb(WET)and dew
point(DEW).

 Max/Min and data hold.
 Low battery indication “ ”.
 LCD display with LED backlight.
 Single data record (TM-188 is able to record 50

data).

2

TM-188/TM-188D

 Viewing data records.
 Switch the temperature unit to ℃ or ℉.
 Brass black ball in 50mm diameter.
 WBGT alarm setting.
 Auto power off with disable function.

 Interface:USB PC serial interface. (TM-188D)
 Data logging capacity :12000 records. (TM-188D)

 Sampling interval: Max 24 hours; Min 1

Second. (TM-188D)

 In order to measure the WBGT index, you should

refer to the following regulations:

ISO7243 : Hot environments. Estimation of the

heat stress on working man.

ISO7726 : Ergonomics of the thermal

environment-instruments for
measuring physical quantities.

3

TM-188/TM-188D

3. Specifications (23℃±5℃)

Wet bulb globe temperature (WBGT)

Unit Range Resolution

indoor

&

Outdoor

without

sunlight

Outdoor

With

sunlight

※indoor & outdoor without sunlight:

WBGT = (0.7×WET)+(0.3×TG)
Outdoor with sunlight:
WBGT=(0.7×WET)+(0.2×TG)+(0.1×TA)

Air temperature (TA)

Unit Range Resolution

℃
℉

℃

0~59.0 0.1 ±1.0

32.0~

℉

138.0

℃

0~56.0 0.1 ±1.5

32.0~

℉

132.0

0~50.0 0.1 ±0.8

32.0~122.0 0.1 ±1.5

0.1 ±1.8

0.1 ±2.7

Accuracy

at 15~

40℃

Accuracy

at 15~40℃

4

TM-188/TM-188D

Black globe temperature (TG)

Unit Range Resolution

℃
℉

0~80.0 0.1 ±0.6

32.0~176.0 0.1 ±1.1

Accuracy

at 15~40℃

Relative Humidity (%RH)

Measurement

Range

Accuracy

±3.0%RH(20~80%) at 25℃
±5.0%RH(<20%,>80%) at 25℃

1%~99%

Resolution 0.1%

Dew point temperature (DEW)

Unit Range Resolution

℃
℉

-35.3~48.9 0.1

-31.5~120.1 0.1

The value is calculated from the RH and Air
temperature.

Wet bulb temperature (WET)

Unit Range Resolution

℃
℉

-21.6~50.0 0.1

-6.9~122.0 0.1

The value is calculated from the RH and air
temperature.

5

TM-188/TM-188D

 Dimension : 243 x 70 x 50mm (L x W x H).
 Weight : 220g. (Without batteries).
 Sampling Rate : one times per second.
 Power supply : 006P 9V,orAC100~240V DC 9V/

0.5A(9mm).

 Battery life : 200 hours.
 Operating Temperature & Humidity :

0°C to +50°C, <95%RH. (Non-condensing)

 Storage temperature & humidity :

-10°C to +50°C, <70% RH. (Non-condensing)

 Data output :USB PC serial interface(TM-188D)
 LCD:

52mm(W)x36mm(L) monochrome LCD and
backlight.

 Standard accessories:

006P 9V battery x1.
User’s manual x 1.
Carrying x1.
USB cable(TM-188D) x1.

AC100~240V to DC9V/0.5A(9mm)x1(TM-188D)

6

TM-188/TM-188D

after used the meter in the humid

, we strongly recommend send the

WARNING

Please place the meter in the
environment of high temperature
and low humidity for 24 hours

environment.

WARNING

In order to ensure the accuracy of this
meter
meter back to original factory for
maintenance every year.

 EMC : This test was designed in accordance with

EMC Standards in force and its compatibility has
been tested in accordance with EN61326-1(2006).

7

TM-188/TM-188D

4. Instrument Description

1. UP/MAX/MIN 9. SEL/Alarm

2. MODE/SET 10. Down/REC

3. Power/Auto power off 11. Battery holder

4. UNIT/HOLD 12. Battery cover

5. LCD 13. 5 pin mini USB
socket.

6. Temp & humidity

sensor

7. Black globe sensor

8. Backlight/MEM

14. DC power jack

8

TM-188/TM-188D

5. LCD Description

1. Alarm symbol 13. Relative Humidity

2. HOLD symbol 14. Secondary display

3. WBGT 15. Read & memory

4. MAX symbol 16.Time symbol

5. Air temperature 17. Date symbol

6. Black globe temp 18. Record symbol

7. Min symbol 19. Set symbol

8. Wet bulb temp 20. Indoor symbol

9. USB symbol 21. Outdoor symbol

10. Dew point temp 22. Low battery symbol

11. Primary display 23. Auto power off symbol

12. Temperature unit

9

TM-188/TM-188D

6. Power On/Off

 Press button to turn on or turn off the

meter.

 Display all the symbol: press button

more than 1 second to turn on the meter the
firmware version will soon be displayed for one
second.

Ex:

7. Auto Power Off

 Power off automatically after approx. 15 minutes

without using the meter.

8. Alarm On/Off

 Press the button for more than 2 second to

turn on or turn off the alarm function.

※ The alarm function will be disable if the

HOLD、SET、Viewing Data Records function is
enabled.

10

TM-188/TM-188D

9. Disable Auto Power Off

 When the power is on, press the button for

more than 2 second, to cancel or recovery
automatically shutdown. Automatic shutdown
feature is enabled If shows on the screen.

※ The auto power off will be disable if the SET

function, USB function, Alarm is enabled.

10. LED Backlight

 : Press this button once to turn on the LCD

backlight. The LCD backlight automatically turns
off after 15 seconds.

11. Temperature Unit

 Press button to switch the temperature to

℃/℉ unit.

11

TM-188/TM-188D

12. Mode

 Press button for less than 1 second to

change the mode. Units switch in order of
WBGT=>TA=>%RH=>TG=>WET=>DEW.

 Press button for less than 1 second to

change the IN/OUT when the LCD displays
WBGT mode.

EX:

※ The mode function will be unavailable if the

HOLD function and SET function is enabled.

12

TM-188/TM-188D

13. Data Hold

 Press button for more than 2 seconds to

enable hold function.

Ex:

※ The HOLD function will be unavailable if SET

function is enabled.

14. Single Data Record

 Press button for less than 1 second to

record the current measured result and the “REC”
and “R” symbol will also appear on the LCD.

※ The single data record function will be

unavailable if the HOLD, SET, Viewing data
records function is enabled.

13

TM-188/TM-188D

15. Viewing Data Records

 Press button for more than 2 seconds to

turn on or off the viewing data records.

 Press or buttonto view the number of

records.

 Press button to change the mode. (IN/OUT

WBGT、TA、%RH、TG、WET、DEW)

 Press button to view the date of recorded

data.

(Select the year, month, date, hours, mined,
second)(TM-188D).

 Press button to switch the temperature unit.
 Press button for more than 2 seconds to

exit the viewing data records mode.

14

TM-188/TM-188D

Ex: TM-188 TM-188D

※ The viewing data records mode will be

unavailable if the HOLD, SET function is
enabled.

16. AUTO DATA LOGGER(TM-188D)

 Press button for more than 2 seconds to

turn on Auto Data logger mode, and the “REC”, “R”
symbol will also appear on the LCD. If you want to
disable Auto Data logger mode, press
button again for more than 2 seconds, and the
“REC”, “R” symbol will also disappear on the LCD.

 It is well temporarily turn off if the single data

record function and the HOLD function enabled.

※ The auto data logger mode will be unavailable

if the HOLD, SET function is enabled.

15

TM-188/TM-188D

17. Maximum/Minimum (MAX/MIN)

 Press button for more than 2 seconds to

enter MAX/MIN mode, and the LCD will display the
maximum temperature data and the “MAX”
symbol.

 Press button for less than 1 second to

change maximum or minimum.

 Press button for more than 2 seconds to exit

maximum/minimum mode.

※ The maximum/minimum mode will be

unavailable if the HOLD, SET, Viewing Data
Records function is enabled.

18. USB (TM-188D)

The LCD will be displayed the “USB” symbol if the
USB cable is connected.

16

TM-188/TM-188D

19. Setting and Calibration

 Press button for more than 2 seconds to enter

into setting mode Fig.A~L(see Table 1):

Fig. A or B setting: WBGT alarm High/Low setting:

 If you want to setup High, press button to

select Fig.A.

 If you want to setup Low,press button to

select Fig.B.

 Press button to start setting, LCD displays

will flashing.

 Press button to change temperature unit.
 Press button to change the digit you want to

adjust.

 Press , button to change the

temperature value.

 Press button to save the setting.

17

TM-188/TM-188D

Fig. C setting year (TM-188D):

 z setting.

Fig. D setting month, date (TM-188D):

 Press button to select the Fig. D.
 Press button to start setting , LCD displays

will flashing.

 Press button to select the digit you want to

adjust.

 Press and button to increase or

decrease the month and data.

 Press button to save setting.
Fig. E setting hour,minute (TM-188D):

 Press button to select the Fig. E.
 Press button to start setting.
 Press button to select the digit you want to

adjust.

 Press , button to increase or decrease

the hour and minute, the hour of the maximum
value is 24 and the minimum is 00, the minute of
the maximum value is 59 and the minimum is 00.

 Press button to save setting.

18

TM-188/TM-188D

Fig. F setting second (TM-188D):

 Press button to select the Fig.F.
 Press button to start setting, LCD displays

will flashing.

 Press button to select the digit you want to

adjust.

 Press , button to increase or decrease the

second, the second of the maximum value is 59 and

the minimum is 00.
 Press button to save setting.
Fig. G setting sampling interval in hours and minutes
(TM-188D):

 Press button to select the Fig.G.
 Press button to start setting, LCD displays

will flashing.
 Press button to select the digit you want to

adjust.
 Press , button to increase or decrease

the hour and minute, the hour of the maximum

value is 24 and the minimum is 00, the minute of

the maximum value is 59 and the minimum is 00.

19

TM-188/TM-188D

 Press button to save setting.
Fig. H setting sampling interval in second

(TM-188D):

 Press button to select the Fig.H.
 Press button to start setting, LCD displays

will flashing.
 Press button to select the digit you want to

adjust.
 Press , button to increase or decrease

the second, the second of the maximum value is

59 and the minimum is 00.
 Press button to save setting.
Fig. I setting clear records:

 Press button to select the Fig.I.
 Press button to start setting, LCD displays will

flashing.

 Press button to select the NO or YES.
 If selected the YES and press button, the

records will be cleared.

20

TM-188/TM-188D

Ex:

Fig. J setting air temperature offset calibration:

 Press button to select the fig.J.
 Press button to start setting LCD displays will

flashing.
 Press button to select the digit you want to

adjust.
 Press , button to increase or decrease

the digit, the digit of the maximum value is 9.9 and

the minimum is -9.9.

 Press button to change temperature unit.
 Press button to save setting.

Fig. K setting Humidity offset calibration:

 Press button to select the Fig.K.
 Press button to start setting, LCD displays

will flashing.
 Press button to select the digit you want to

adjust.

21

TM-188/TM-188D

 Press , button to increase or decrease

the digit, the digit of the maximum value is 9.9 and

the minimum is -9.9.
 Press button to save setting.

Fig. L setting black globe temperature offset

calibration

 Press button to select the Fig .L.
 Press button to start setting, LCD displays

will flashing.
 Press button to select the digit you want to

adjust.
 Press , button to increase or decrease

the digit, the digit of the maximum value is 9.9 and

the minimum is -9.9.

 Press button to change temperature unit.
 Press button to save setting.

22

TM-188/TM-188D

Fig.AFig.BFig.CFig.DFig.EFig.F

Fig.GFig.HFig.

I

Fig.JFig.KFig.

L

Table 1

23

TM-188/TM-188D

Categories

Examples Activities

Resting

Sitting quietly

Sitting with moderate arm movements

Light

movements

whil

e using mostly arms

Using a table saw

machine or bench and some walking about

Moderate

Scrubbing in a standing position

pushing

Kg weight load

Heavy

Carpenter sawing by hand

Shoveling

dry san

d

basis

puling (e.g., pick

-

and-shovel work

Very heavy

Shoveling wet sand

20. Thermal hazard prevention standards

 Screening Criteria for Heat Stress Exposure

(WBGT values in℃)

 Example of activities within Metabolic Rate

Categories

Sitting with moderate arm and leg
Standing with light work at machine or bench

Standing with light or moderate work at

Walking about with moderate lifting or
Walking on level at 6 Km/hr while carrying 3

Heavy assembly work on a non-continuous
Intermittent heavy lifting with pushing or

24

TM-188/TM-188D

According to the American Conference of
Governmental Industrial Hygienists.[ACGIH](2005)

21. Precautions

 Keep the meter away from electromagnetic

interference (EMI) which may cause erratic

readings.
 The measured values will be inaccurate if you

touch the black ball during the test.
 If the shape of black ball is being impacted to

deformation, this will lead to inaccurate measured

values.

22. Software installation (TM-188D)

1. Link website https://www.tenmars.com/

2. Click English in the upper right corner of the
web page.

3. Search TM-188D.

4. Click on the TM-188D photo.

5. Click File Download, then select Software

Download.

6. Download and unzip the software.

7. For the latest software information and
installation procedures, Please download the
Installation Guide.

8. For software usage instructions, please
download the software User Manual.

25

TM-188/TM-188D

23. External DC power

External AC to DC adapter : Voltage 9 VDC(8~14 V
Max)/500mW.
Socket: Pin positive, Ground casing negative.
External diameter 5.5mm internal diameter 2.1mm .

24. Safety and maintenance standards

 Do not put this device in direct sunlight or

where it is hot and/or damp.

 Operating altitude: below 2,000m.

DC

26

TM-188/TM-188D

WARNING

l, please

prevent battery leakage and corroding the

25. Battery replacement

1. If the LCD displays “ ”symbo
replace the battery immediately.

2. If not used for a long time or more than
1 month, please remove the battery to

internal components.

1.Turn off the power.

2.Open the battery cover under the thermometer
and remove the battery.

3.Please install a new 9V battery with the

direction of positive and negative polarity.

4.Close the battery cover.

27

TM-188/TM-188D

26. End of life

WARNING

If not using the meter, please remove the
battery to avoid possible damage.

Caution: This symbol indicates that
equipment and its accessories shall
be subject to a separate collection
and correct disposal.

28

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well all over the world

TENMARS ELECTRONICS CO., LTD

6F, 586, RUI GUANG ROAD, NEIHU,

TAIPEI 114, TAIWAN.

E-mail : [email protected]