3M QUESTemp 44 User manual

QUESTempo 44 and QUESTemp o 46 User Manual
©3M 2011. All Rights Reserved
3M Occupational Health and Environmental Safety Division
3M™QUESTemp°™Heat Stress Monitors
Market Leader
From the
Robust Construction
From the

053-664, Rev.C QUESTempº 44 & 46 models
Copyright
This document is copyrighted by Quest Technologies, a 3M company.
Permission is hereby granted to copy and distribute this manual provided
that this Copyright Page is included. This grant does not include permission
to modify the manual’s text or illustrations in any way.
This manual may not be translated without obtaining permission in advance.
Trademarks
• Quest Technologies, the Quest logo, and QuestSuiteTM Professional II
are registered trademarks of Quest Technologies. All rights are
reserved.
• Microsoft and Windows are registered trademarks of Microsoft, Inc.
Updates
In the interests of continuous product improvements, Quest Technologies
reserves the right to make changes to product specifications without notice.
To understand the latest updates that have been implemented into this
product and to download the most current version of this user manual, visit
our web site at www.quest-technologies.com.
Copyright © 2011 Quest Technologies, a 3M company

ii Contents
053-664, Rev.C QUESTempº 44 & 46 models
Contents
Introduction..............................................................................................................1
QUESTempº Models...............................................................................................1
Getting Started........................................................................................................2
Up and Running overview.....................................................................................2
Keypad Operation .................................................................................................2
I/O Enter key…………………………………………………………………………………..3
Up Arrow key………………………………………………………………………………….3
Down Arrow key………………………………………………………………………………3
Run/Stop key………………………………………………………………………………….3
Escaping or moving back one screen………………………………………………………3
Turning on/off and basic operation................................................................. 4
Placing the QUESTempº44/46 on the job site ................................................. 4
Sensors..................................................................................................................5
About the sensor bar ..................................................................................... 5
Globe thermometer ....................................................................................... 5
Waterless wetbulb sensor and relative hiumidity sensor................................... 5
Dry bulb thermometer ................................................................................... 5
Remote, Sensors 2 and 3 .....................................................................................6
Tri-sensor weighted average.......................................................................... 6
Measurements.......................................................................................................7
Waterless wetbulb......................................................................................... 7
Computing waterless wetbulb and wind speed………………………………………………..…….7
WetBulb globe temperature ........................................................................... 8
Stay times/rest times (QTº46 only)................................................................. 8
Heat index/Humidex...................................................................................... 8
Airflow.......................................................................................................... 8
Thermal comfort............................................................................................ 9
Operating QUESTempº 44/46.............................................................................10
Contents

Contents
053-664, RevC. QUESTempº 44 & 46 models
iii
View............................................................................................................10
Setup...........................................................................................................10
Setup for waterless wetbulb measurement (airflow rate) ................................11
Print ............................................................................................................12
Reset...........................................................................................................12
Run .............................................................................................................12
Displayed items...................................................................................................13
Stay time date..............................................................................................14
Data logging ........................................................................................................15
Printing.................................................................................................................16
Serial...........................................................................................................16
Parallel ........................................................................................................16
Airflow functionality............................................................................................18
Operating sequence......................................................................................19
Data logging airflow......................................................................................19
Batteries for air probe...................................................................................19
Operational check...............................................................................................19
Power options .....................................................................................................20
9-Volt alkaline battery replacement................................................................20
Approved 9-volt batteries..............................................................................20
NiMH battery pack........................................................................................21
Appendix A: Specifications...............................................................................22
Appendix B: Heat Exposure Tables .................................................................24
ACGIH .........................................................................................................24
ACGIH Clothing Corrections...........................................................................25
United States Navy.......................................................................................25
Flag Conditions for U.S. Navy/Marine Corp. Ashore………………………………….……27
Electrical power research institute (EPRI)......................................................27

Contents
053-664, RevC. QUESTempº 44 & 46 models
iv
Appendix C: Accessories...................................................................................28
Air probe accessories....................................................................................28
Appendix D: PC Communications....................................................................29
QSP-II quick overview ..................................................................................29
Retrieving your studies into QSP-II................................................................29
Downloaded node (where your data is stored) ...............................................30
Viewing your heat stress data in QSP-II.........................................................31
Adding panels (charts/graphs).......................................................................33
Saving your customized layout (charts/graphs) ..............................................33
Creating reports ...........................................................................................34
Viewing and printing reports .........................................................................35
Quest Service ......................................................................................................36
Contacting Quest Technologies......................................................................36
International customers................................................................................36
Warranty...............................................................................................................36
List of Figures
Figure 1-1: QUESTempº44/46 in a thermal environment .................................................................... 1
Figure 1-2: Keypad explained............................................................................................................ 3
Figure 1-3: Main menu of the QTº44/46............................................................................................. 4
Figure 1-4 About sensor bar and serial number................................................................................. 5
Figure 1-5 Sensors identified............................................................................................................ 5
Figure 1-6 Viewing measured data ..................................................................................................10
Figure 1-7 Setting the airflow for Waterless Wetbulb sensor..............................................................11
Figure 1-8 Run mode indicator........................................................................................................12
Figure 1-9 Wet and Dry screen........................................................................................................13
Figure 1-10: Globe screen..................................................................................................................13
Figure 1-11: WBGTi & WBGTo screen.................................................................................................13
Figure 1-12: RH and H.I/HU screen....................................................................................................13
Figure 1-13: Air Flow screen on QTº46................................................................................................13
Figure 1-14: Stay times (ACGIH)........................................................................................................14
Figure 1-15: Time & Date screen........................................................................................................14
Figure 1-16: Battery & Memory screen................................................................................................14
Figure 1-17: Navy Stay time screen....................................................................................................14
Figure 1-18: Marine heat condition flag system ...................................................................................15
Figure 1-19: EPRI Stay time screen ....................................................................................................15
Figure 1-20: Sample printout (page 1)................................................................................................16
Figure 1-21: Sample printout (page 2)................................................................................................17
Figure 1-22: Airflow configuration.......................................................................................................18

Contents
053-664, RevC. QUESTempº 44 & 46 models
v
Figure 1-23: 9-volt battery.................................................................................................................20
Figure 1-24: NiMH rechargeable battery..............................................................................................21
Figure 1-25: Communicating to QSP-II ...............................................................................................29
Figure 1-26: Download data screen in QSP-II......................................................................................30
Figure 1-27: Viewing your studies from QSP-II....................................................................................31
Figure 1-28: Downloaded data ...........................................................................................................31
Figure 1-29: Viewing layout view (charts and graphs) in QSP-II...........................................................32
Figure 1-30: Saving a customized template of the layout view (charts/graphs)......................................34
Figure 1-31: Sample Heat Stress report from QSP-II............................................................................35
List of Tables
Table 1-1: Example of a memory table................................................................................................15
Table 1-2: Downloading data in QSP-II explained................................................................................32
Table 1-3: Explanation of panels (graphs and charts) components........................................................33

1 Introduction
Up and Running overview
053-664, Rev.C QUESTempº 44 & 46 models
Introduction
The new heat stress instruments, the QUESTempº44 and QUESTempº46, offer
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 Waterless Wet Bulb calculation through a combination of dry bulb
temperature, globe temperature, relative humidity, and air flow. The Waterless Wet
Bulb is used to calculate the Wet Bulb Globe Temperature (WBGT) which is a widely-
used method to monitor environmental conditions related to heat stress.
Figure 1-1: QUESTempº44/46 in a thermal environment
QUESTempº Models
QUESTempº44 and QUESTempº46 both measure and calculate the dry bulb, wet bulb,
globe, WBGT indoors, WBGT outdoors, relative humidity, and Heat Index or Humidex.
With the QUESTempº 46, you 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 ACHIH TLV Handbook, U.S. Navy PHEL charts, U.S. Navy/Marine Corp.
Ashore Flag system, and EPRI Action Limits.
An additional feature with the QUESTempº46 is an optional detachable probe for
measuring air velocity to determine appropriate levels of indoor thermal comfort
monitoring.
Introduction

2 Getting Started
Up and Running overview
053-664, Rev.C QUESTempº 44 & 46 models
Getting Started
Up and Running overview
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.
1. Place the QUESTempº44/46 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 to select.
5. Press the Run/Stop key to begin datalogging. Use the arrow keys to set
the display to the desired items.
Getting Started

3 Getting Started
Keypad Operation
053-664, Rev.C QUESTempº 44 & 46 models
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 calibration screens, you can press
Run/Stop key to escape or move back one screen.
Figure 1-2: Keypad explained
I/O Enter key
Run/Stop key
Up arrow key
Down arrow key

Getting Started
Turning on/off and basic operation
053-664, Rev.C QUESTempº 44 & 46 models
4
Turning on/off and basic operation
To quickly get you started with the QUESTempº44/46, the following section explains
how to turn on the instrument, run, and stop your session.
1. Press the I/O Enter key to turn on. Proceeding the model and revision
information displayed on the screen, the main menu will appear.
Figure 1-3: Main menu of the QTº44/46
2. Press the I/O Enter key (when view is selected) to access the measurement
screens.
(The Wet and Dry measurements screen will display. See Figure 1-6, page
10 for an example).
3. To view different measurements, press the Up or Down arrow key to toggle
through the views.
 NOTE: There are 5-user selectable languages included in the QUESTemp º
44/46. If you see the fields such as Wet, Dry, WBGTi, and WBGTo this indicates
the measurements are displaying in English.
 To display an alternative language, select Setup from the main menu.
Press the Down arrow repeatedly until “English” (or the appropriate
language) appears. Then repeatedly press the I/O enter key to toggle
through the languages. Once selected, all menus and measurement
screens will change to the selected language. To return to the main menu,
press the Run/Stop key.
4. 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.
a. 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.
5. To power off, press and hold the I/O enter key from the main menu.
Placing the QUESTempº44/46 on the job site
The QUESTempº44/46 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 datalogging, allow ten minutes for the sensors readings to stabilize.
Indicator arrow
Indicates the selected menu
option. Then press I/O enter to
select or press up/down arrows
to select another option
VIEW PRINT
SETUP RESET

Sensors
About the sensor bar
053-664, Rev.C QUESTempº 44 & 46 models
5
Sensors
About the sensor bar
The sensor bar, on the QTº44/46, is calibrated to its specific instrument and is not
interchangeable with other QTº44/46. The instrument has a sensor bar label which
includes the serial number of the instrument and a sensor bar number. (This is
indicated in the diagram below.)
Figure 1-4: About sensor bar and serial number
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 Sensor and 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. (Please see “Waterless Wetbulb” on page 7 for more details.)
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 1-5: Sensors identified
A. Globe thermometer
B. Relative humidity sensor
C. Dry bulb thermometer
A
B
C
Sensors
Serial number and sensor bar number label

Remote, Sensors 2 and 3
Tri-sensor weighted average
053-664, Rev.C QUESTempº 44 & 46 models
6
Remote, Sensors 2 and 3
The top sensor bar (sensor 1) may be removed from the instrument and used
through a remote cable. Shelter the instrument and remote the sensor bar if the
measured environment is expecting heavy rain or if temperatures are above 60C.
The sensor 2 and sensor 3 jacks on the side of the instrument allow simultaneous
monitoring of up to three sensor arrays using connecting cables.
Cable lengths of up to two hundred feet (61 meters) may be used without a decrease
in accuracy provided the environment does not contain strong electromagnetic fields.
The data from these arrays may be viewed separately or combined into a weighted
average WBGT reading per ISO 7243. Change the displayed sensor bar by pressing
and releasing the enter key. The upper right corner of the display shows the
current sensor bar. 1 refers to the top sensor bar, 2 and 3 are labeled on the side
of the unit, W indicates the weighted average which only appears if a WBGT is
displayed and all three of the sensor bars are attached.
Tri-sensor weighted average
Per the recommendations outlined in ISO 7243: 1989, when the temperature in the
space surrounding a worker is not uniform, it is necessary to determine the WBGT
index at three heights corresponding to the worker's ankles, abdomen and head and
perform a weighted average on those values. It is computed using the formula:
WBGTw = (WBGT head + (2 x WBGT abdomen) + WBGT ankles)/4
The QUESTemp44/46 always assigns the top sensor bar the double weighting. This
calculation is shown if a WBGT display has been selected and if 3 sensor sets are
connected.
Remote
Sensors

Measurements
Waterless Wetbulb
053-664, Rev.C QUESTempº 44 & 46 models
7
Measurements
The QUESTemp44/46 data logging area 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), stay times
for four possible indices, and the Heat Index (HI) or the Canadian Humidex. Using
inputs on the side of the instrument, two additional sensor arrays can monitor up to
three locations simultaneously.
On the QUESTempº46 model, you can measure airflow, in meters per second, by
plugging an optional hot wire anemometer sensor into a side jack on the unit.
Determine thermal comfort indices, Predicted Mean Vote (PMV) and Predicted Percent
Dissatisfied (PPD), using QuestSuite software.
Waterless Wetbulb
The Waterless Wetbulb is an estimated measurement using the % of Relative
Humidity, Dry Bulb Temperature, and Globe Bulb Temperature to determine
the psychrometric wetbulb. The psychrometric wetbulb value is adjusted
based on airflow to provide the waterless wetbulb estimate.
Computing Waterless wetbulb and wind speed
When computing the waterless wetbulb, you can increase accuracy by setting
the airflow to the current environments wind speed. The recommended
airflow setting for an indoor environment is 0.3 m/s unless otherwise
determined with an air-probe measurement (available only on the QTº46
model). The recommended setting for outdoor environment is 2.0 m/s.
NOTE: To convert wind speed from miles/hour to meters/sec use the
following formula:
Miles/hour * .447 = meters/sec. (Example: If the average
wind speed is 5mph, then enter 5*.447 = 2.2 meters/sec.)
If you are using the QUESTempº46 with the Air Probe attached, you would
not set the airflow setting. (It will automatically calculate with the current
reading.)
Please see “Setup for Waterless Wetbulb measurement” on page 11 for
details on setting the Airflow.
Measurements

Measurements
WetBulb Globe Temperature
053-664, RevC. QUESTempº 44 & 46 models
8
WetBulb Globe Temperature
The WBGT is a weighted average of the three temperature sensors using the following
formulas:
WBGT (indoor) = 0.7WB + 0.3G (denoted as “WBGTi” on the display)
WBGT (outdoor) = 0.7WB + 0.2G + 0.1DB (denoted as “WBGTo” on the display)
The resulting WBGT values can then be compared to indices of work-rest regimens
(stay times) based upon work loads.
Stay Times/Rest Times (QTº46 only)
Stay times 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, U.S. Navy/Marine Corp. Ashore Flag
Conditions, or EPRI Action Limits. Refer to Appendix B for more information on the
indices.
Heat Index/Humidex
The Heat Index is determined using the dry bulb temperature and relative humidity.
Based upon charts available from the U.S. National Weather Service, Heat Index
represents how an average person feels relative to climate conditions. For a given
temperature, the higher the humidity, the higher the heat index.
The Heat Index is defined over a temperature range of 70F - 120F (21C - 49C) and
a relative humidity range of 30% - 99%. Outside of this range, the instrument will
show dashes in the display for the Heat Index.
The Humidex, used primarily in Canada, works on the same concept as the Heat
Index. The values are slightly different. The Humidex is defined over a temperature
range of 70F - 109F (21C - 43C) and a relative humidity range of 20% - 99%.
Outside of this range, the instrument will show dashes in the display for the Humidex.
Airflow
The QUESTemp46 measures airflow if Quest’s Air Probe accessory is used. The
Air Probe uses an omni-directional anemometer sensor that measures air flow
between 0 and 20 meters per second in 0.1m/s increments. Please see “Airflow
Functionality”, page 18 for more details.

Measurements
Thermal Comfort
053-664, RevC. QUESTempº 44 & 46 models
9
Thermal Comfort
Thermal comfort readings for indoor environments are a benefit of QuestSuite
software and are not displayed or printed from the instrument directly. Readings
are derived from the dry bulb, relative humidity, mean radiant temperature,
airflow, and user entered parameters of clothing, metabolic rate and external work.
Thermal comfort indices, Predicted Mean Vote (PMV) and Predicted Percent
Dissatisfied (PPD), help predict the thermal satisfaction level of a person with their
indoor environment. The PMV is a rating scale of +3 to -3 where +3 is much to
warm, -3 is much too cool, and 0 is thermally neutral. The PPD reflects what percent
of people in a given location would be dissatisfied with their thermal surroundings.
The formulas used by QuestSuite to derive the PMV and PPD come from the
international standard ISO 7730 “Moderate thermal environments - Determination of
the PMV and PPD indices and specification of the conditions for thermal comfort”.

Operating QUESTempº 44/46
View
053-664, Rev.C QUESTempº 44 & 46 models
10
Operating QUESTempº44/46
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.
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 1-6: Viewing measured data
 NOTE: To return to the menu, hold down the I/O ENTER key while a 3, 2, 1
countdown is shown in the lower right corner of the display. Then the menu
screen will appear (see Figure 1-3, page 4 for an example).
Setup
Allows changing temperature units, language, time, date, logging rate, selecting
between Heat Index and Humidex, turning air flow on or off, and setting stay time
parameters.
To Setup parameters do one of the following:
1. From the main menu, select Setup by pressing the I/O Enter key.
2. Use the Arrow keys to select an item (listed below).
Temperature: Celsius, Fahrenheit.
Language: English, Spanish, French, Italian, German.
Time: 24 hour clock only.
Date: Day-month-year format.
Log Rate: 1, 2, 5, 10, 15, 30, 60 minutes.
Heat Index (United States), Humidex (Canada)
Flow: On (QTº46 only), Off with fixed rate. (0.3 m/s is the
recommended value for indoor applications and 2.0 m/s for outdoor
applications)
WET 65.5ºF 1
DRY 74.0ºF
View mode
Indicates you are
viewing sensor one
data
Operating

Operating QUESTempº 44/46
Setup for Waterless Wetbulb measurement (airflow rate)
053-664, RevC. QUESTempº 44 & 46 models
11
Index: none, ACGIH, Navy, Marine, EPRI and select either: WBGTi (indoor),
WBGTo (outdoor) for Index setting.
Index Setting Notes
TLV and action limit only apply to the ACGIH Index. EPRI Navy, and Marine will
ignore this setting.
Clothing Correction parameters are set from 0 - 9.9C. This is a clothing correction
for the WBGT in degrees Celsius and is applied to the selected WBGT when the
work duration is calculated. (It will not affect the WBGT as displayed by the unit.)
This value should typically be set to 0.0 for the Navy. (The field is noted as “Clo
Corr”.)
3. Press the I/O Enter key to change a parameter. Time and date require
using the Up/Down Arrows and I/O Enter keys to modify each
number.
 NOTE: at any time, you can move back one level, by pressing the
Run/Stop key.
4. Exit Setup by pressing the Run/Stop key.
Setup for Waterless Wetbulb measurement (airflow rate)
For the Waterless Wetbulb sensor calculation, an airflow rate (or wind
speed) of 0.3 m/s is recommended and is the default setting of the
instrument. NOTE: only QT º 46 supports the optional air-probe
accessory.
If an air probe is not selected, the average wind speed of the
environment should be configured. This value is then entered into the
Flow screen under the setup menu.
Figure 1-7 Setting the airflow for Waterless Wetbulb sensor
To Setup Airflow rate
1. In the setup menu, select Flow by pressing the Up/Down Arrow key to
select.
Flow Off
Flow 00.3 m/s
Airflow rate
The selected value will be underlined.
Press the Up/Down arrow key to change.
Press I/O Enter key to select a value
position.

Operating QUESTempº 44/46
Print
053-664, RevC. QUESTempº 44 & 46 models
12
2. Press I/O Enter key and press Up/Down Arrow key to change the values.
The I/O Enter key is pressed to toggle through the changeable fields and to
return to the first column.
Print
Allows printing to a parallel or serial printer or to a computer. The QuesTempº
44/46 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
The run mode begins a session in memory and logs the data.
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 1-8 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”.
WBGTi 66.7ºF 1
WBGTo 68.6ºF 
Run indicator

Displayed Items
Run
053-664, RevC. QUESTempº 44 & 46 models
13
Displayed Items
For the QUESTemp44/46, the number in the upper right corner indicates which
sensor bar’s data is displayed.
“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”.
“W”indicates the weighted average which only appears if a WBGT is
displayed and all three sensor bars are attached. An asterisk in the lower
right corner indicates that the unit is in the run mode and is logging data.
The following measurements can be accessed on the display:
Screen 1: WET (Wet bulb)
DRY (Dry bulb)
Figure 1-9 Wet and Dry screen
Screen 2: GLOBE
Figure 1-10: Globe screen
Screen 3: WBGTi (Indoors)
WBGTo (Outdoors)
Figure 1-11: WBGTi & WBGTo screen
Screen 4: RH (Relative Humidity)
H.I. or HU
(Heat Index or Humidex)
Figure 1-12: RH and H.I/HU screen
Screen 5: Air Flow (QTº46 only)
(If turned ON via setup)
Figure 1-13: Air Flow screen on QTº46
WET 80.5ºF 1
DRY 92.2ºF 
GLOBE 92.4.ºF 1

WBGTi84.1 º F 1
WBGTo 107.5 º F 

RH 66.2 % 1
H.I. 84.3ºF 
FLOW 0.3m/s 1
Displayed
Items

Displayed Items
Stay Time
053-664, Rev.C QUESTempº 44 & 46 models
14
Screen 6: Stay times (QTº46 only)
Figure 1-14: Stay times (ACGIH)
Screen 7: Time (24 hour format)
Date (day, month, year)
Figure 1-15: Time & Date screen
Screen 8: BAT (Battery voltage)
MEM (Logging memory
available in days)
Figure 1-16: Battery & Memory screen
NOTE: A series of dashes appear in the display if one of the following occur:
The Heat Index or Humidex is outside of its allowable range
The temperature is outside of its allowable range
A temperature sensor has failed
Stay times temperatures are outside of the their defined range
Stay Time
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). (Please see Figure 1-13 above.)
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 1-17: Navy Stay time screen
L M H VH 1
60 45 30 15 

TIME 11:04:13 1
DATE 26-JUN-08 
BAT 11:04:13 1
MEM 10.4dy 
PHEL_5 3:10 1
PHEL_6 2:10