3M 48N User Manual

3M Persomal Safety Division

3M™ QUESTemp°™Heat Stress Monitors

Robust Construction

From the

From the

Market Leader

QUESTemp

©3M 2013 All Rights Res erved

o

48N User Manual

i Contents

Contents

Contents

Introduction .......................................................................................................................................................... 1

QUESTempº 48N Model....................................................................................................................................... 1

Getting Started ..................................................................................................................................................... 2

Up and Running overview ................................................................................................................................... 2

Placing the QUESTempº 48N on the job site ..................................................................................................... 2

Keypad Operation ............................................................................................................................................... 3

Turning on, logging/capture an event, and turning off ........................................................................................ 4

Sensors................................................................................................................................................................. 6

Globe Thermometer ............................................................................................................................................ 6

Waterless Wetbulb & Relative Humidity Sensor ................................................................................................. 6

Dry Bulb Thermometer........................................................................................................................................ 6

Measurements ..................................................................................................................................................... 7

WetBulb Globe Temperature (WBGT) ................................................................................................................ 7

Stay Times/Rest Times (Indicies) ....................................................................................................................... 7

Remote measurements ....................................................................................................................................... 7

Operating QUESTempº 48N ................................................................................................................................ 8

View .................................................................................................................................................................... 8

Setup ................................................................................................................................................................... 8

Print ................................................................................................................................................................... 10

Reset ................................................................................................................................................................. 10

Run ................................................................................................................................................................... 10

Displayed Items ................................................................................................................................................. 11

Stay Time/Index ................................................................................................................................................ 12

Data Logging ...................................................................................................................................................... 13

Electronic sensor check ................................................................................................................................... 14

Performing an electronic sensor check ............................................................................................................. 14

Sensor Alignment .............................................................................................................................................. 15

RH Sensor Alignment ....................................................................................................................................... 15

Printing ............................................................................................................................................................... 17

Contents

ii

Data/Communications....................................................................................................................................... 17

Parallel .............................................................................................................................................................. 18

Power .................................................................................................................................................................. 19

9-Volt Alkaline Battery Replacement ................................................................................................................ 19

Approved 9-Volt Batteries ................................................................................................................................. 19

Appendix A: Specifications ............................................................................................................................. 20

QUESTemp° 48N Block Model ........................................................................................................................ 22

Appendix B: Heat Exposure Tables ................................................................................................................. 23

ACGIH ............................................................................................................................................................... 23

ACGIH Clothing Corrections ............................................................................................................................. 24

United States Navy ........................................................................................................................................... 24

Flag Conditions for U.S. Navy/Marine Corp. Ashore ........................................................................................ 26

Appendix C: Accessories ................................................................................................................................. 27

Appendix D: Software ...................................................................................................................................... 28

DMS quick overview ......................................................................................................................................... 28

Communicating and Downloading in DMS ....................................................................................................... 28

Data Finder and quick reports .......................................................................................................................... 29

Customer service .............................................................................................................................................. 31

Contacting 3M Instrumentation ......................................................................................................................... 31

International customers..................................................................................................................................... 31

Calibration .......................................................................................................................................................... 31

Warranty ............................................................................................................................................................. 31

List of Figures

Figure 1-1: QUESTempº 48N in a thermal environment……………………………………………………………………. 1
Figure 1-2: Keypad keys identified…………………………………………………………………………………………….. 3
Figure 1-3: Start-up screens……………………………………………………………………………………………………4
Figure 1-4: Index start-up screen……………………………………………………………………………………………... 4
Figure 1-5: Log rate start-up screen………………………………………………………………………………………….. 4
Figure 1-6: Main menu of the QT48N………………………………………………………………………………………… 5
Figure 1-7: Measurement screen …………..………………………………………………………………………………… 5
Figure 1-8: Sensors identified………………………………………………………………………………………………… 6
Figure 1-9: Main menu example………………………………………………………………………………………………. 8
Figure 1-10: Viewing measured data…………………………………………………………………………………………. 8
Figure 1-11: Selecting temperature setting and setup………………………………………………………………………….. 9

Contents

iii

Figure 1-12: Selecting temperature setting………………………………………………………………………………………. 9
Figure 1-13: Selecting log rate with event log……………………………………………………………………………….. 9
Figure 1-14: Run mode indicator……………………………………………………………………………………………. 10
Figure 1-15: Wet and Dry screen…………………………………………………………………………………………….. 11
Figure 1-16: Globe and RH screen………………………………………………………………………………………….. 11
Figure 1-17: WBGT screen…………………………………………………………………………………………………… 11
Figure 1-18: Time and Date screen…………………………………………………………………………………………. 11
Figure 1-19: Battery & memory screen……………………………………………………………………………………... 12
Figure 1-20: Navy PHEL stay times…………………………………………………………………………………………..12
Figure 1-21: Index for ACGIH………………………………………………………………………………………………... 12
Figure 1-22: Navy PHELs screen…………………………………………………………………………………………….13
Figure 1-23: Flag Conditions Navy/Marine Corp. Ashore………………………………………………………………… 13
Figure 1-24: Main menu with view selected ……………………………………………………………………………….. 15
Figure 1-25: Alignment screen………………………………………………………………………………………………. 15
Figure 1-26: Sunshield & placement of finger cot prior to RH alignment……………………………………………… 15
Figure 1-27: RH alignment with Low % example………………………………………………………………………… 16
Figure 1-28: RH alignment with High% screen…………………………………………………………………………… 16
Figure 1-29: Sample DMS event data report……………………………………………………………………………… 17
Figure 1-30: Sample printouts……………………………………………………………………………………………….. 18
Figure 1-31: 9-volt battery……………………………………………………………………………………………………. 19
Figure 1-33: Communicating with the QT⁰ 48N and DMS……………………………………………………………….. 28
Figure 1-34: Communicating with the QT⁰ 48N and DMS……………………………………………………………….. 29
Figure 1-35: Data Finder Page……………………………………………………………………………………………… 29
Figure 1-36: Quick Report…………………………………………………………………………………………………… 30
Figure 1-37: Analyze button opens to the panel layout page…………………………………………………………… 30

LIST OF TABLES

Table 1-1: Keypad explained ................................................................................................................................... 3

Table 1-2: Settings indentified ................................................................................................................................. 8

Table 1-3: Example of a Memory table .................................................................................................................. 13

1 Introduction

Introduction

Up and Running overview

Introduction

The QUESTempº 48N offers traditional heat stress monitoring without the aggravation
of maintaining a wet bulb. Through collaboration with Professor Dr. Thomas Bernard,
from the College of Public Health at the University of South Florida, mathematical
models were implemented to create a
combination of dry bulb temperature, globe temperature, relative humidity, and air
flow.

Figure 1-1: QUESTempº 48N in a thermal environment

Waterless Wet Bulb calculation

through a

QUESTempº 48N Model

The QUESTempº 48N model was specifically engineered for the Department of
Defense Ashore and Afloat Operations in which conditions require hand’s free
monitoring, in-the-field user RH/WBGT sensor alignments, and snapshot measurement
logging (called “event logging mode”).

The QT48N measures and calculates the dry bulb, wet bulb, globe, WBGT outdoors,
and relative humidity with two different types of data logging modes – as a time
history session or an event logging mode.

You also have the capability to measure stay times in order to manage work/rest
regimens. Guidance is based on the screening criteria for heat stress as defined in the
ACGIH TLV Handbook, U.S. Navy PHEL charts, and Flag Conditions for U.S.
Navy/Marine Corp. Ashore.

2 Getting Started

1. Place the QUESTempº 48N in the work area in a safe location approximately

3.5 feet off the ground.

2. Turn the unit On. If the battery voltage displayed during the power-on
sequence is less than or equal to 6.4 volts, replace or recharge the
batteries.

3. Be aware that the sensors require 10 minutes to stabilize to a new
environment.

4. In the main menu, View will be selected (an indicator arrow denotes the
selected menu). Press the I/O Enter key and the measurement screen
will appear.

5. Press the Run/Stop key to begin datalogging. Use the Arrow keys to
set the display to the desired items.

Getting started

Up and Running overview

Getting Started

Up and Running overview

Placing the QUESTempº 48N on the job site

The QUESTempº 48N should be placed at a height of 3.5 feet (1.1m) for standing
individuals or 2 feet (.6m) for seated individuals. Tripod mounting is recommended
to get the unit away from anything that might block radiant heat or airflow. A 1/4"x
20 threaded bushing on the bottom of the instrument allows mounting to a
standard photographic tripod. Do not stand close to the unit during sampling.

Before data logging, allow ten minutes for the sensors readings to stabilize.

3 Getting Started

Keys

Explanation

I/O Enter key

The unit turns on with a single key press. The unit turns off
by holding the key down while a countdown of 3-2-1 occurs
in the lower right corner of the display. This key is also used
to select a mode (such as Setup or View) or enter setup
changes.

Pressing and releasing the key while viewing temperatures
causes the display to view the next available sensor bar
(indicated in the upper right corner of the display).

Up Arrow key

Changes items appearing in the display. Scrolls up.

Down Arrow
key

Changes items appearing in the display. Scrolls down.

Run/Stop key

From the menu or view modes, pressing this key starts or
stops the run mode. Pressing this key will exit the setup,
print or reset modes.

Escaping or
moving back
one screen

If you are in the setup, print, reset, or sensor alignment
screens, you can press Run/Stop key to escape or move
back one screen.

I/O Enter key

Run/Stop key

Up Arrow key

Down Arrow key

Keypad Operation

Keypad Operation

The unit operates using a keypad with 4 keys. The I/O Enter key responds
when the key is released while all other keys respond when the key is pressed.

Table 1-1: Keypad explained

Figure 1-2: Keypad keys identified

Getting Started

4

A

B

Turning on, logging/capture an event, and turning off

Turning on, logging/capture an event, and turning off

To quickly get you started with the QUESTempº 48N, the following section explains

turning on the instrument, data logging/event logging, and stopping.

1. Press the I/O Enter key to turn on.

 The first two start-up screens detail the name, type of instrument, and then

a revision and battery power screen appears. (Ensure the battery level
does not fall below 6.4V or you will want to replace the battery. See



“Power options”, page 19 for more details.)

NOTE: if you have data saved on the instrument, an additional screen stating
“data in memory” will appear prompting you to reset the instrument, if desired.

Figure 1-3: Start-up screens (A – indicates model and type
B- indicates revision and battery power)

2. In the Index Start-Up screen, press I/O Enter key. (

selected from the Setup menu, this will appear on this screen.

NOTE: if an index is

)

Figure 1-4: Index start-up screen

3. A Log Rate Start-Up screen will appear, press I/O Enter key. (This screen
details your log rate time or event logging setup option and the last saved
logged session or event.) (See Setup, page 8 for more information on event
logging.)

Figure 1-5: Log rate start-up screen

Getting Started

5

Indicator arrow

Indicates the selected menu option.
Either press up/down arrows to
select a new menu or press I/O
Enter key to select.

Run indicator

Will appear when you are in “Run
mode”. For an event, it will appear for

about 1-2 seconds as an event is
recorded in the instrument’s history.

Numeric counter

Event records or Data logging
sessions displayed

Turning on, logging/capture an event, and turning off

4. The main menu (navigational screen) will appear after the start-up screens.
Press I/O Enter key. (This will open to the measurement screens.)

Figure 1-6: Main menu of the QT48N

5. Press Run/Stop key to either Data Log or log/record an Event and an asterisk
will appear in far right corner. (NOTE: Data logging or an Event is selected
via the Setup menu.)

 Numeric counter

o

Event logging/recording:

increase by one displaying the number of saved events.

o

Data logging mode

sessions instead of Events. (The process is identical to event mode.)

Figure 1-7: Measurement screen (example)

6. To stop data logging, press and hold Run/Stop key. (NOTE: please skip this
step for an Event log. An event log will capture the measurements with the
initial run/stop key press.)

7. To view different measurements, press the Up or Down Arrow key to toggle
through the views.

8. To return to the main menu, press and hold the I/O Enter key (3, 2, 1
countdown will appear) and the main menu will display.

 To select an option on the main menu, press the Up or Down Arrow until

an arrow appears directly in front of the appropriate menu selection and
then press I/O enter key.

9. To power off, press and hold the I/O Enter key from the main menu.

As you record events, the numeric counter will

: This will display the number of saved data logged

Sensors

6

A. Globe thermometer
B. Relative humidity sensor
C. Dry bulb thermometer

Sensors

A

B

C

Globe Thermometer

Sensors

Globe Thermometer

The globe thermometer (left position) gives an indication of the radiant heat
exposure on an individual due to either direct sunlight or hot objects in the
environment. This is accomplished by placing a temperature sensor inside a
blackened copper sphere and measuring the temperature rise. The WBGT index
is based on the response of a 6 inch diameter globe. The QUESTemp uses a 2
inch diameter globe for a faster response time. The temperature of the 2 inch
globe is correlated to match that of a 6 inch globe.

Waterless Wetbulb & Relative Humidity Sensor

The relative humidity sensor (middle position) is used to calculate the Waterless
Wetbulb from a combination of dry bulb temperature, humidity and wind speed
measurements. The waterless wetbulb is used to calculate an estimated WBGT
value.

Dry Bulb Thermometer

The dry bulb thermometer (right position) measures the ambient air
temperature. This measurement is used in the outdoor WBGT calculation when
a high solar radiant heat load may be present. The series of white plates
surrounding the sensor shield it from radiant heat.

Figure 1-8: Sensors identified

Measurements

7

**NOTE: Navy and Marine calculations are all based on the outdoor computation.

 WBGT (outdoor) = 0.7WB + 0.2G + 0.1DB (denoted as “WBGT” on the display)

Measurements

WetBulb Globe Temperature (WBGT)

Measurements

The QUESTemp 48N data logging, with an event logging mode, heat stress
monitor directly senses three parameters: dry bulb temperature (DB), globe
temperature (G), and relative humidity (RH).

It computes the Wet Bulb (WB), the Wet Bulb Globe Temperature (WBGT), and the
Stay Times Indices for ACGIH, U.S. Navy PHEL charts, and Flag Conditions for U.S.
Navy/Marine Corp. Ashore.

WetBulb Globe Temperature (WBGT)

The WBGT is a type of temperature index which combines the effects of
temperature, humidity, radiant heat, and air flow and provides a relatively simplistic
tool to analyze thermal comfort. The resulting WBGT values can then be compared
to indices of work-rest regimens (stay times) based upon workloads.

The WBGT calculation is a weighted average of the three temperature sensors using
the following formulas:

Stay Times/Rest Times (Indicies)

Stay Times Indices represent how long a worker should be able to safely work
under heat stress conditions. Select one of four indices for displaying and
printing from the unit: ACGIH Stay Times, NAVY PHEL’s, or Flag Conditions for
U.S. Navy/Marine Corp. Ashore. Refer to Appendix B for more information on
the indices. NOTE: it will appear as “Index” on the measurement screen.

Remote measurements

The top sensor bar may be removed from the instrument and used through a
remote cable. (Please refer to Appendix C for remote cable options.) Shelter
the instrument and remote the sensor bar if the measured environment is
expecting heavy rain or if temperatures are above 60C.

Operating QUESTempº 48N

8

Settings

Explanation

Temperature units

 Selectable: ºF/ºC

Language setting

 Selectable: English, Spanish, French, Italian, and German

Time and Date

 Time settings: 24-hour clock

 Day-month-year format

Log Rate

 1, 2, 5, 10, 15, 30, 60 minutes log rate options
 Event Log: when run/stop is pressed, an event or snapshot

of the current conditions is logged into memory. The events
range from 0-99.

Index/Stay Times

 ACGIH, PHEL, FLAG, or none (denoted “----”)

View mode

Arrow icon Indicates you are in view mode

Operating

Event #

Last logged event/session

View

Operating QUESTempº 48N

From a powered on mode, the main menu
will appear (after the start-up screens are
displayed.) Use the Up Arrow and Down
Arrow keys to move the marker in the
display in front of the desired mode. Pressing
the I/O Enter key will select the mode.

Figure 1-9: Main menu example

View

Displays the measured data but does not log it. If more than one set of sensors
is plugged into the unit, they can be displayed by pressing and releasing the I/O

Enter key. The displayed sensor set is shown in the upper right corner.

Figure 1-10: Viewing measured data



NOTE: To return to the main menu, hold down the I/O Enter key while a
3, 2, 1 countdown is shown in the lower right corner of the display.

Setup

The setup options are from the main menu when Setup is selected. At any time,
to exit (or escape) a screen, press the Run/Stop key. Table 1-2 identifies the
setup parameters.

Table: 1-2: Settings indentified

Operating QUESTempº 48N

9

Next event number

*To increase, press up arrow key (used
to simulate skipping an event.)

Event

Example of setting Log Rate
to Event Log

Operating:

Setup

Temperature setting – press I/O Enter key
to switch between values.

Press I/O Enter key to select Setup.

Setup

 Selecting Setup parameters

1. From the main menu, select Setup by pressing the I/O Enter key. Using
the Up/Down Arrow keys, select the settings in steps 2-6.

Figure 1-11: Selecting temperature setting and setup

2. For the Time and Date settings, once selected, press I/O Enter key to
move to the update field. (An underline will appear under the first field.)

 Press Up/Down Arrows to change the number/month. Press I/O

Enter key to toggle through each field. Repeat as necessary until all

values are selected.

3. For the Temperature setting, either Fahrenheit or Celsius will appear.
Press the Up/Down Arrow to select and I/O Enter key to change.

Figure 1-12: Selecting temperature setting

4. For the Language setting, once selected, press I/O Enter key. To select a
language, press Up/Down Arrow keys. Once selected, press Run/Stop
key to return to setup parameters.

5. For the Log Rate, once selected, press I/O Enter key.

 Repeatedly press I/O Enter keys to select either the Log Rate Event or

a Log Rate interval (for data logging; e.g. “5”).

 Optional: changing Next Event field. Events are numbered starting

at 1 and incrementing. The number may be increased to simulate
skipping events. This may be useful if the events represent locations
and the starting location is somewhere other than 1.

Figure 1-13: Selecting log rate with event log

6. For the Index setting, once selected press I/O Enter key. Press
Up/Down Arrow keys to select: “---” (which is equivalent for no index),

ACGIH, PHEL, or Flag.

7. Exit Setup by pressing the Run/Stop key.

Operating QUESTempº 48N

10

Run indicator

Operating:

Print, reset, run

Print

Print

Allows printing to a parallel or serial printer or to a computer. The QUESTempº
48N will recognize the cable plugged in and configure itself for serial or parallel.
If no cable is plugged in, it will default to serial. Press I/O Enter key to begin
printing. Press Run/Stop key to return to the menu.

 NOTE: if you wish to stop the printing, press I/O Enter key until you return

to the main menu. When the printer has stopped printing, remove the cable
from the printer to the instrument.

Reset

Resetting enables you to clear the logged data from memory. Press the I/O
Enter key to enter the Reset mode. Clear the memory by holding down the
I/O Enter key while the display counts down from three.

Run

For Data Logging setup, the run mode begins a session in memory and logs the
data. For Event Logging, each run/stop is stored as an event and a numeric
counter displays the number of saved events.

1. Begin a session by pressing the Run/Stop key from the view mode (or

measurement view). An asterisk in the lower right corner indicates the run
mode.

 To toggle through the views, press the Up or Down Arrow.

Figure 1-14: Run mode indicator

2. End the session by pressing the Run/Stop key again. (The session will stop

recording when the asterisk is no longer displayed.)



NOTE: If the logging memory is full or if there are no sensors plugged into
the unit, attempting to enter the Run mode will result in an error message. If
the memory capacity is exceeded, the asterisk in the lower right corner of the
display will turn into an “F” and the memory remaining screen will show “0.0”.

Displayed Items

11

Displayed items

Run

Displayed Items

For the QUESTemp 48N, the number in the upper right corner indicates the
saved session or the saved event log.

 “1”indicates the sensor bar placed on (or attached to) the top of the

instrument. Sensors 2 and 3 are labeled on the side of the unit as
“Sensor 2”, and “Sensor 3”.

 An “*” asterisk in the lower right corner indicates that the unit is in the

run mode and is logging data or saves an event.

The following measurements can be accessed on the display:

Screen 1: WET (Wet bulb)
DRY (Dry bulb)

Screen 2: GLOBE and RH

Figure 1-16: Globe and RH screen

Screen 3: WBGT

Figure 1-17: WBGT screen

Screen 4: Time (24 hour format)

Date (day, month, year)

Figure 1-18: Time and Date screen

Figure 1-15: Wet and Dry screen

Displayed Items

12

Stay Time/Index

Stay Time/Index

Screen 5: BAT (Battery voltage)
MEM (Logging memory
available in days)

Figure 1-19: Battery & memory

screen

Screen 6: Index

(Navy PHEL stay times)

Figure 1-20: Navy PHEL stay times

 NOTE:

The screen(s) displaying stay time data appear different for each of the possible
indices.

If ACGIH is selected, the recommended working minutes per hour are shown for
each of the workload categories Light (L), Moderate (M), Heavy (H), and Very
Heavy (VH).

A series of dashes appear in the display if one of the following occur:

 The temperature is outside of its allowable range
 A temperature sensor has failed
 Stay times temperatures are outside of the their defined range

Figure 1-21: Index for ACGIH

Data Logging

13

Log Rate

1 min

2 min

5 min

10 min

15 min

30 min

60 min

1 sensor

11.2

22.5

56.2

112.4

168.6

337.3

674.5

2 sensors

5.6

11.2

28.1

56.2

84.3

168.6

337.3

3 sensors

3.7

7.5

18.7

37.5

56.2

112.4

224.8

Navy/Marine Corp’s heat
condition flag warning example

PHELs stay time is greater than 8 hours.

Stay Time/Index

If the Navy PHELs are selected, the recommended working hours are shown
based on a maximum of eight hours. Three screens are used to display the
PHELs two at time.



NOTE: “8:01” following one of the PHELs indicates greater than eight hours.

Figure 1-22: Navy PHELs screen

If Flag is selected, the Flag Conditions for Navy/Marines Corp. Ashore warning
system screen will appear. There are five flag systems, no flag, yellow, green, red,
and black, which provide heat exposure guidelines for acclimated individuals. (For
more information, please refer to the “Flag Conditions US Navy/Marine Corp.
Ashore” on page 26.)

Figure 1-23: Flag Conditions Navy/Marine Corp. Ashore

Data Logging

Data from each sensor is recorded at the interval set by the logging rate. Every
time Run/Stop is pressed, a session is either started or ended in memory.
Each session contains a header with time, date, and summary information.

Memory Table: Gives the number of logging DAYS.

Table 1-3: Example of a Memory table

Electronic sensor check

14

Electronic Sensor

check

Example of Verification module

Performing an electronic sensor check

Electronic sensor check

A verification module, Quest model 053-923, may be used to check the operation of the
QUESTemp’s wet bulb, dry bulb, and globe. The purpose is to verify that the electronic
components are within a specific range with known values and a known source. The
temperature tolerances should be within +/-0.5oC.



NOTE: If the sensors are outside of the tolerances, this indicates the sensor alignment
should be serviced off-site for calibration.

Performing an electronic sensor check

1. Ensure the instrument is reading in Celsius prior to your electronic sensor check.

 To change the temperature setting, select Setup from the main menu. Then,

either Fahrenheit or Celsius will appear on the screen. When selected, press I/O
enter key to switch between settings. For more information, please refer to page 9,
step 3.

2. Remove the top sensor bar, place to the side, and plug in the verification module into
the center pins of the sensor housing.

3. Verify the measurement readings on the screen are within +/- 0.5C tolerance to the
readings printed on the verification module label. Example below:

a. Wet Bulb (WB): 11.1C b. Dry Bulb (DB): 45.3C
c. Globe (G): 69.2C




NOTE: Relative humidity (RH) is not valid on this instrument.

4. Once completed, remove verification module and place sensor bar back on the
instrument. (Tighten down the two bolts.) Change the Celsius reading back to
Fahrenheit. (Refer to step 1 a-b.)

Sensor Alignment

15

“High” is selected when the arrow
appears in front of the text.

(RH Sensor) Alignment menu

Place unrolled finger cot, with a small
hole cut in the top, so it is completely
stretched over the humidity sensor.

Sensor alignment

(A)

(B)

Note: WBGT is not used in sensor alignment

Sunshield:

Slide off RH
sensor to
remove.

RH Sensor Alignment

Sensor Alignment

For highly accurate measurement readings, you should align your QUESTempº 48N prior to
data logging or event logging/recording. For the RH sensor, it is recommended to align with
a High concentration level using the 75% sensor salt, NaCl (sodium chloride), or a Low
concentration level using the, the 33% sensor salt, MgCl (magnesium chloride). (To order

Figure 1-24: Main menu with view selected (A) & measurement screen (B)

Figure 1-26: Sunshield & placement of finger cot prior to RH alignment

sensor alignment salts, refer to an online vendor such as, colepalmer.com.)

RH Sensor Alignment

1. To open, navigate to the main menu and select View by pressing I/O Enter key (see
A). A measurement screen will appear (see B).

2. Press and hold I/O Enter key and then press Down Arrow key from the View menu.
The Alignment screen will appear.

Figure 1-25: Alignment screen

3. Press Up/Down Arrow key to select either High or Low. Then press I/O Enter key.

4. Remove (or slide) the Sunshield (white globe) from the RH sensor and place it to the

side. (See Figure 1-26).

5. Place a latex finger cot (user supplied) over the humidity sensor in order for the sensor

to stabilize quicker about 15 minutes (or up to 60 minutes without).

can be found at various hardware stores or online such as colepalmer.com.

Note: latex finger cots

Sensor Alignment

16

Example of high RH percentage prior to
sensor alignment. Press up/down arrows
to adjust level after salt has stabilized.

Sensor alignment with High % RH level

Press Enter to save
the alignment.

Alignment salt (remove rubber cap and place over RH
sensor with the sunshield removed)

Once Alignment salt is placed, allow
levels to stabilize (about 15 mins).

Low RH Alignment screen

Adjust % to 33% (using up/down arrow
keys) and press Enter (after level has
stabilized) to store sensor alignment level.

RH Sensor Alignment

6. Place the Salt container, with the salt alignment cap removed, over the RH sensor

(middle sensor). Allow level to stabilize for at least 15 minutes. (Refer to Figure 1-25.)

 About sensor alignment: if readings are within +/-0.5%, a change in sensor alignment

is not required. Skip to step 7 to return to main menu.



NOTE: For a High alignment, use the 75% sensor alignment salt (NaCL) and for a Low

alignment, use the 33% alignment salt (MgCl).

Figure 1-27: RH alignment with Low % example

7. In either the High/Low RH alignment screen, adjust the level to the percentage displayed

on the salt container by using the Up/Down Arrow keys. Press I/O Enter key to save.

(The instrument will state either “Successful” or “Failure” if it passed/did not pass. For
“Failure” repeat the steps above.)

Figure 1-28: RH alignment with High% screen

8. To return to the main menu, press Run/Stop key.

9. Verify the RH sensor is +/-0.5% of the specific percentage. If not repeat the steps above.

10. Remove the alignment salt and finger cot. Replace the Sunshield over the RH sensor

when completed with the sensor alignment.

Printing

17

Printing

Data/Communications

Printing

Printing options include to a RS-232 port or to a parallel printer. Serial transmission requires
Quest cable #54-715. Parallel transmission requires Quest cable #56-875. With the
applicable cable plugged in, select PRINT from the menu and press the I/O Enter key to
enter the PRINT mode. Begin printing by pressing the I/O Enter key. Press the key again
to abort the printing.

Data/Communications

3MTM Detection Management Software DMS is recommended for downloading, storing,
graphing, and printing reports (see below). Communications programs, such as Window’s
Hyperterminal may also be used to capture the printout into a file. The baud rate is fixed at

9600.

Figure 1-29: Sample DMS event data report

Printing

18

EVENT: 1 Page 2
Sensor: 1

Degrees Fahrenheit
Stay Times: ACGIH, Acclimated, WBGT, clo correction = 1.0 °C

TIME WBGT DRY GLOBE RH HI FLOW L M H VH
11:08 67.9 82.4 90.7 13 0 0.5 60 60 60 60
11:09 68.1 82.6 91.3 12 0 0.5 60 60 60 60

EVENT: 2 Page 3

Sensor: 1
Degrees Fahrenheit
Stay Times: ACGIH, Acclimated, WBGT, clo correction = 1.0 °C

TIME WBGT DRY GLOBE RH HI L M H VH
11:08 79.3 98.9 104.5 15 0 60 45 30 15
11:09 80.2 99.2 105.6 15 0 60 45 30 15

EVENT: 3 Page 4

Sensor: 1
Degrees Fahrenheit
Stay Times: ACGIH, Acclimated, WBGTi, clo correction = 1.0 °C

TIME WBGT DRY GLOBE RH HI L M H VH
11:08 68.1 88.0 92.7 11 0 60 60 60 60
11:09 68.4 88.3 92.9 11 0 60 60 60 60

EVENT: 4 Page 5

Sensor: WBGT(W-AVG) = .50*WBGT(1) + .25*WBGT(2) + .25*WBGT(3)
Degrees Fahrenheit

Stay Times: ACGIH, Acclimated, WBGT, clo correction = 1.0 C WBGT
WBGTo

TIME W-AVG W-AVG L M H VH

----- ----- ----- --- --- --- --­ 11:08 71.5 70.8 60 60 60 60
11:09 71.8 71.1 60 60 60 45

QUEST TECHNOLOGIES, a 3M company Page 1
HEAT STRESS REPORT

File Name _________________________ QUESTempº48N Rev 1.00

Serial # TK09090909

Employee _________________________

Facility _________________________ Session (3)
Start: 21-NOV-09 11:07:32
Department ________________________ Stop: 21-NOV-09 11:10:15

Job _________________________ Printed: 21-NOV-09 11:16:00

Comments/Notes______________________________________________

____________________________________________________________

Logging Interval: 1 minutes
Degrees Fahrenheit

MAXIMUM LEVELS, Sensor 1

WBGT 68.3 21-NOV-09 11:10:08
DRY BULB 82.7 21-NOV-09 11:09:56
GLOBE 91.4 21-NOV-09 11:10:12
REL HUMIDITY 14% 21-FEB-08 11:07:32
FLOW (m/s) 0.6 21-FEB-08 11:09:08

MAXIMUM LEVELS, Sensor 2

WBGT 80.5 21-FEB-08 11:10:11
DRY BULB 99.2 21-FEB-08 11:09:07
GLOBE 106.1 21-FEB-08 11:10:06
HEAT INDEX 0 00-XXX-00 00:00:00
REL HUMIDITY 15% 21-FEB-08 11:07:32

MAXIMUM LEVELS, Sensor 3

WBGT 68.6 21-FEB-08 11:09:56
DRY BULB 88.6 21-FEB-08 11:10:08
GLOBE 93.0 21-FEB-08 11:10:03
HEAT INDEX 0 00-XXX-00 00:00:00
REL HUMIDITY 11% 21-FEB-08 11:07:32

MAXIMUM LEVELS, Sensor(WEIGHTED AVERAGE)
WBGT 71.4 21-FEB-08 11:10:14

Parallel

Parallel

Data can be sent directly to parallel printers that accept direct ASCII test input without
special drivers. Make sure the printer is powered on and is online, ready to accept
data, prior to printing.

Figure 1-30: Sample printouts

Powering

19

Power options

9-Volt Alkaline Battery Replacement

Powering

The QUESTempº 48N uses a 9-volt alkaline battery. A door on the back of the
instrument allows the user access to the 9-volt battery.

The 2-position switch located in the battery compartment is
set by the user to the 9-volt battery.

Figure 1-31: 9-volt battery

9-Volt Alkaline Battery Replacement

WARNING:

The 9-volt battery should be replaced should be recharged when the voltage drops
below 6.4 volts. The battery voltage is displayed when the instrument is turned on.
While turned on, the battery voltage can be displayed at any time by pressing the up or
down arrow keys to move through the display until the battery voltage screen appears.
If, while operating, the battery voltage drops below 6.4 volts, the display will
automatically switch to the display showing the battery voltage along with a low battery
message. After a low battery occurs, the unit will continue to operate for
approximately 8 hours. When the battery voltage falls to 6.2 volts or below, the unit
will automatically turn off.

Replace only with an approved 9-volt alkaline battery.

Approved 9-Volt Batteries

Eveready: Energizer 522, EN22, 6LR61
Duracell: MN1604
Panasonic: 6LR61, 6AM6X
Rayovac: A1604
UltraLife: U9V

Replace batteries only in a non-hazardous environment.

Appendix A: Specifications

20

Appendix A

Approved 9-Volt Batteries

Appendix A: Specifications

Measurements

 Globe Temperature, Dry Bulb Temperature, Wet Bulb Temperature, % Relative

Humidity, and WBGT Index

 Temperatures given in Celsius or Fahrenheit

 Index (displayed stay time with selected index): ACGIH TLV, U.S. Navy PHEL

Data Logging mode and Event logging mode

Languages

Sensors

Operating Temperature Range

Housing

Charts, Flag Conditions for U.S. Navy/Marine Corp. Ashore

Data logging mode records and prints all measurements at user selected interval of 1,
2, 5, 10, 15, 30, or 60 minutes.

Event logging mode (1 second record) 128K bytes of data memory.

English, French, Spanish, Italian, German

Dry Bulb Sensor- 1000 Ohm Platinum RTD

 Accuracy and Ranges: +/-0.5 from 0°C to 120°C (+/-0.9°F from 32°F

to 248°F)

Waterless Wet Bulb (Humidity) Sensor

 Accuracy and Ranges: Expanded measurement uncertainty of 1.1°C

(k=2) between 0°C and 80°C (32°F and 176°F)

Globe Sensor- 1000 Ohm Platinum RTD

 Accuracy and Ranges: +/-0.5 from 0°C to 120°C (+/-0.9°F from 32°F

to 248°F)

Relative Humidity Sensor - Integrated circuit with capacitive polymer sensor

 Accuracy and Ranges: +/-5% from 20 to 95% (non-condensing)

Sensor Assembly: -5C to +100C
Electronics: -5C to 60C

Designed water resistant to a light rain or mist. If rain is frequent, best practice
would be to remote the sensor bar and keep the instrument sheltered.

Appendix A: Specifications

21

Approved 9-Volt Batteries

Size

Height 9.2in (23.5cm); Width 7.2in (18.3mm); Depth 3.0in (7.5mm)
Dimensions include mounted sensor assembly

Weight

2.6 lbs. (1.2 kg) with mounted sensor assembly

Remote Sensor Bar

Using a cable, the top sensor bar can be setup for remote measurements, up to
200 feet (61m).

Power

9V alkaline

Battery Life

9V alkaline: 80 hours

Appendix A: Specifications

22

Sensors
1, 2, & 3

Multiplexer

Gain

Keypad

A/D

Microprocessor

LCD

RS232
Printer

Power

Controller

Battery

Data

Memory

Program

Memory

Block model

QUESTemp 48N Block Model

QUESTemp° 48N Block Model

Appendix B

23

Work and recovery

(TLV )

Light

Moderate

Heavy

Very Heavy

75% to 100%

31.0

28.0

26.0*

23.5*

50% to 75%

31.0

29.0

27.5

25.5*

25% to 50%

32.0

30.0

29.0

28.0

0% to 25%

32.5

31.5

30.5

30.0

Work and recovery

(Action Limit)

Light

Moderate

Heavy

Very Heavy

75% to 100%

28.0

25.0

22.5*

20.0*

50% to 75%

28.5

26.0

24.0

22.5*

25% to 50%

29.5

27.0

25.5

24.5

0% to 25%

30.0

29.0

28.0

27.0

Appendix B

Power

Controller

Battery

Program

Memory

ACGIH

Appendix B: Heat Exposure Tables

ACGIH

Screening Criteria for Heat Stress Exposure. WBGT values in C.

to the ACGIH’s guidelines, the temperature values represent a work and rest process
which is explained in the standards. Please refer to the ACGIH TLVs and BEIs for
specific details.

NOTE: according

*Values not specified by ACGIH have been estimated for continuity.

Appendix B

24

Clothing type

Clothing correction (Addition to WBGT (ºC)

Work clothes (long sleeve shirt and pants)

0º

Cloth (woven material) coveralls

0º

Double-layer woven clothing

3º

SMS polypropylene coveralls

0.5º

Polyolefin coveralls

1º

Limited-use vapor-barrier coveralls

11º

WBGT(F)

I

II

III

IV

V

VI

80.0

>8:00

>8:00

>8:00

8:00

6:35

4:30

81.0

>8:00

>8:00

>8:00

8:00

6:35

4:30

82.0

>8:00

>8:00

8:00

7:05

5:25

3:40

83.0

>8:00

8:00

7:45

6:25

4:55

3:20

84.0

>8:00

8:00

7:05

5:55

4:30

3:05

85.0

8:00

7:45

6:30

5:20

4:05

2:50

86.0

8:00

7:05

5:55

4:55

3:45

2:35

87.0

7:25

6:30

5:25

4:30

3:25

2:20

88.0

6:45

5:55

4:55

4:05

3:10

2:10

89.0

6:10

5:25

4:30

3:45

2:50

2:00

90.0

5:40

5:00

4:10

3:25

2:40

1:50

91.0

5:15

4:35

3:50

3:10

2:25

1:40

ACGIH Clothing Corrections

ACGIH Clothing Corrections

The following clothing corrections are in degrees Celsius. When a clothing correction
is entered into the setup portion of the QUESTemp 48N, the value is added to the
WBGT only for looking up the stay times. The WBGT value displayed by the unit
does not reflect corrections.

Cited from "American Conference of Governmental Industrial Hygienists - Threshold
Limit Values and Biological Exposure Indices for 2008"; Reprinted with permission
from ACGIH

United States Navy

Physiological Heat Exposure Limits (PHELs) Time Table
(Without the presence of fuel combustion gases/fuel vapors)

The recommended working hours are shown based on a maximum of eight hours.
Naval personnel will follow a category, I - VI, based upon their function.

PHEL Curves (Total Exposure Time in Hours: Minutes)

Appendix B

25

WBGT(F)

I

II

III

IV

V

VI

92.0

4:50

4:10

3:30

2:55

2:15

1:30

93.0

4:25

3:50

3:15

2:40

2:00

1:25

94.0

4:05

3:35

3:00

2:25

1:50

1:15

95.0

3:45

3:15

2:45

2:15

1:45

1:10

96.0

3:25

3:00

2:30

2:05

1:35

1:05

97.0

3:10

2:45

2:20

1:55

1:25

1:00

98.0

2:55

2:35

2:10

1:45

1:20

0:55

99.0

2:40

2:20

2:00

1:40

1:15

0:50

100.0

2:30

2:10

1:50

1:30

1:10

0:45

101.0

2:20

2:00

1:40

1:25

1:05

0:45

102.0

2:10

1:50

1:35

1:15

1:00

0:40

103.0

2:00

1:45

1:25

1:10

0:55

0:35

104.0

1:50

1:35

1:20

1:05

0:50

0:35

105.0

1:40

1:30

1:15

1:00

0:45

0:30

106.0

1:35

1:25

1:10

0:55

0:45

0:30

107.0

1:30

1:15

1:05

0:50

0:40

0:25

108.0

1:20

1:10

1:00

0:50

0:35

0:25

109.0

1:15

1:05

0:55

0:45

0:35

0:25

110.0

1:10

1:00

0:50

0:40

0:30

0:20

111.0

1:05

1:00

0:50

0:40

0:30

0:20

112.0

1:00

0:55

0:45

0:35

0:25

0:20

113.0

0:55

0:50

0:40

0:35

0:25

0:15

114.0

0:55

0:45

0:40

0:30

0:25

0:15

115.0

0:50

0:45

0:35

0:30

0:20

0:15

116.0

0:45

0:40

0:35

0:25

0:20

0:15

117.0

0:45

0:40

0:30

0:25

0:20

0:10

118.0

0:40

0:35

0:30

0:25

0:15

0:10

119.0

0:35

0:35

0:25

0:20

0:15

0:10

120.0

0:35

0:30

0:25

0:20

0:15

0:10

121.0

0:35

0:30

0:25

0:20

0:15

0:10

122.0

0:30

0:25

0:20

0:15

0:15

0:10

123.0

0:30

0:25

0:20

0:15

0:10

0:10

124.0

0:25

0:25

0:20

0:15

0:10

0:05

United States Navy

Appendix B

26

Flag Degrees F

No Flag

Green

Yellow

Red

Black

<80.0

80.0-

84.9

85.0-

87.9

88.0-

89.9

>90

Flag Degrees C

<26.7

26.7-

29.4

29.4-

31.1

31.1-

32.2

>32.2

Flag Conditions for U.S. Navy/Marine Corp. Ashore

Flag Conditions for U.S. Navy/Marine Corp. Ashore

The following chart details the heat stress monitoring Flag Conditions for
U.S. Navy/Marine Corp. Ashore in Degrees Fahrenheit and Celsius.

* Rest means minimal physical activity (sitting or standing) and should be
accomplished in the shade if possible.

Appendix C: Accessories (sold separately)

27

Appendix C

Appendix C: Accessories (sold separately)

Replacement Relative humidity sensor (one included) 57-317
Sensor array with 2-inch Globe and removable RH sensor (one included) 57-909
Sensor alignment salt at 75% [ NaCl (sodium chloride)] (one included) 100-452
Sensor alignment salt at 33% [ MgCl (magnesium chloride)] (one included) 100-451
Verification module (one included) 53-923
Neck Strap (one included) 057-333
QT-3X series replacement battery cover QT3X-BC
QT-3X series replacement dry bulb shield assembly- QT3X-DBS
consists of (5) shields and (1) cap/cover.
Remote sensor cable - 6 Foot 53-924
Remote sensor cable - 25 Foot 53-925
Remote sensor cable - 100 Foot 53-926
Remote sensor cable - 200 Foot 53-927
Serial/Computer interface cable (RS-232 to PC) 9 Pin 54-715
RS232 to USB converter (one included) 53-810
Parallel printer interface cable 56-875
Storage case (one included) 53-922
QT-48N’s Owner’s manual (one included) 57-330

Appendix D: Software

28

Appendix D

QT⁰ 48 data port

 Connected and powered on

Connected to serial port

Appendix D: Software

The QUESTemp 48N has the flexibility to be set up and controlled through
computer software. The programmable start and stop time feature is only
accessible through the computer. The instrument also has the capability of
sending
Detection Management Software DMS.

live data

while measuring. These features are best utilized using 3MTM

DMS quick overview

The focus of this section is to briefly introduce the following QSP-II topics:
Downloading your data, setting up parameters, and viewing your data in charts,
graphs, and reports. (For further details on DMS, please refer to the online Help
and select Contents.)

Communicating and Downloading in DMS

In order to download, review the data, and setup parameters in DMS software,
this will require connecting the QT⁰48N to a computer. The steps below explain
connecting and communicating to DMS.

1. Using a 3M Quest cable, part number 054-715, plug the cable into the

computer and plug the opposite end into the side jack of the QT⁰ 48 data
port.

Figure 1-33: Communicating with the QT⁰ 48N and DMS

2. From the start page of DMS, select button and the instrument

communication panel will appear.

3. Select Heat Stress and then select the Model Type by clicking on

QT⁰48N. (See Figure 1-34).

Appendix D: Software

29

1

2

Data Finder checkbox. When
checked, this will automatically
open to the downloaded data page.

Download

Double-click to
select/view
QT⁰44/46 data in
charts and graphs

3

Double-click to
select/view
QT⁰44/46 data in
charts and graphs

1

Data Finder and quick reports

4. Click on the button in the Instrument Communications page while

Data finder checkbox is checked (see 3 below).

 Note: The data Finder page will appear. See next section.

Figure 1-34: Communicating with the QT⁰ 48N and DMS

Data Finder and quick reports

In the Data finder page, the data you downloaded is stored by instrument family and

then organized by models. Note: when working in this page, click on the Most
Recent button if you are looking for your recently downloaded data.

1. In the data finder page, click on the downloaded data and select either analyze or
print report.

Figure 1-35: Data Finder Page

Appendix D: Software

30

Data Finder and quick reports

 Quick Report: select the button to generate a report with basic

information and a summary table of your downloaded data.

Figure 1-36: Quick Report

 Analyze: allows you to add charts/graphs and customize how they will appear

in a report. Tip: add the panels by using the add a panel and dragging them
into the appropriate location.

 Press button and it will generate a report based on the where the

charts/graphs (panels) are placed.

Figure 1-37: Analyze button opens to the panel layout page

31 Appendix D: Quest Service
Contacting Quest Technologies

Customer service

Contacting 3M Instrumentation

Should your 3M equipment need to be returned for repair or for recalibration, please
contact the service department at the following number or access the online form via
the website. For technical issues, please contact Technical Support.

Service Department and Technical Support: 1 [phone].

Fax: [phone]. Office hours are 8:00 a.m. to 5:00 p.m. United States Central.
E-mail: [e-mail]
Website: www.3M.com/detection

International customers

Contact your local, factory-authorized distributor from whom the product was
purchased. You can obtain the name and contact information of your local factory­authorized distributor from Quest by using the e-mail, telephone, or fax information
given under “Contacting 3M” above.

Calibration

The QUESTemp⁰ 48N and 3M field calibrator devices should be examined regularly by
the factory. An annual calibration is recommended. (Please see Service Department
above.)

Warranty

3M warrants our instruments to be free from defects in materials and workmanship
for one year under normal conditions of use and service. For United States
customers, we will replace or repair (our option) defective instruments at no charge,
excluding batteries, abuse, misuse, alterations, physical damage, or instruments
previously repaired by other than 3M. Microphones, sensors, printers, and chart
recorders may have shorter or longer warranty periods. This warranty states our total
obligation in place of any other warranties expressed or implied. Our warranty does
not include any liability or obligation directly resulting from any defective instrument
or product or any associated damages, injuries, or property loss, including loss of use
or measurement data.
For warranty outside the United States, a minimum of one year warranty applies
subject to the same limitation and exceptions as above with service provided or
arranged through the authorized 3M distributor or our 3M European Service
Laboratory. Foreign purchasers should contact the local 3M authorized sales agent
for detail.

About Us

3M Detection Solutions is a world class manufacturer of rugged, reliable instrumentation and software
systems that help monitor and evaluate occupational and environmental health and safety hazards, including
noise dosimetry, sound level monitoring, heat stress, indoor air quality and select toxic/combustible gases.
The 3M Detection brand of instrumentation is used by safety and industrial hygiene professionals to help
comply with applicable occupational standards and regulations.

About 3M Personal Safety

3M offers a comprehensive, diverse portfolio of Personal Safety solutions providing respiratory
protection, hearing protection, fall protection, reflective materials for high visibility, protective clothing,
protective eyewear, head and face protection, welding helmets, and other adjacent products and
solutions such as tactical safety equipment, detection, monitoring equipment, active communications
equipment and compliance management. In 2012, 3M celebrated 40 years of safety leadership –
recognizing the company’s respiratory and hearing protection solutions introduced in 1972. Visit
www.3M.com/PPESafety or http://m.3m.com/PPESafety for details.

Personal Safety Division

3M Detection Solutions
1060 Corporate Center Drive
Oconomowoc, WI 53066
ISO 9001 Registered Company
ISO 17025 Accredited Calibration Lab
Customer Service: 262-567-9157
Toll Free: 800-245-0779

www.3m.com/detection

3M is a trademark of 3M Company
used under license in Canada.
Please recycle. Printed in USA.
© 2013 3M
All rights reserved.
057-330 Rev.E. 2 /13