TSI Instruments questemp 44 User manual

iii Contents
Contents
Contents..................................................................... iii
Introduction ................................................................ 1
QUESTemp° Models .................................................. 1
Getting Started ........................................................... 2
Up and Running overview ....................................... 2
Keypad Operation ................................................... 2
Turning on/off and basic operation.......................... 3
Placing the QUESTemp° 44/46 on the job site....... 4
Sensors....................................................................... 5
About the sensor bar ............................................... 5
Globe Thermometer ................................................ 5
Waterless Wetbulb Sensor and Relative Humidity
Sensor ..................................................................... 5
Dry Bulb Thermometer ............................................ 6
Remote, Sensors 2 and 3 .......................................... 7
Tri-sensor weighted average................................... 7
Measurements............................................................ 8
Waterless Wetbulb .................................................. 8
WetBulb Globe Temperature................................... 9
Stay Times/Rest Times (QTº46 only)...................... 9
Heat Index/Humidex................................................ 9
Air Flow.................................................................... 9
Thermal Comfort ...................................................10
Operating QUESTemp° 44/46 ................................. 11
View....................................................................... 11
Setup .....................................................................11
Setup for Waterless Wetbulb measurement
(air flow rate).......................................................... 12
Print .......................................................................12
Reset .....................................................................13
Run........................................................................13
Displayed Items........................................................14
Stay Time ..............................................................15
Data Logging ............................................................16
Electronic sensor check..........................................17
Performing an electronic sensor check ................. 17
Sensor Alignment .................................................... 18
RH Sensor Alignment............................................ 18
Printing ..................................................................... 21
Serial ..................................................................... 21
Parallel .................................................................. 22
Air Flow functionality .............................................. 23
Operating sequence.............................................. 24
Data Logging Air Flow........................................... 24
Batteries for Air Probe........................................... 24
Operational Check................................................... 24
Power options.......................................................... 25
9-Volt Alkaline Battery Replacement .................... 25
Approved 9-Volt Batteries ..................................... 25
NiMH Battery Pack................................................ 26
Appendix A: Specifications ................................... 27
Measurements ...................................................... 27
Data Logging......................................................... 27
Languages ............................................................ 27
Housing ................................................................. 27
Size ....................................................................... 27
Weight ................................................................... 27
Sensor Types ........................................................ 27
Accuracy ............................................................... 27
Operating Temperature Range ............................. 28
Remote Sensor Bars............................................. 28
Power Options....................................................... 28
Battery Life ............................................................ 28
Charge Time (NiMH Battery Pack) ....................... 28
Air Probe Accessory.............................................. 28
Appendix B: Heat Exposure Tables...................... 29
ACGIH................................................................... 29
ACGIH Clothing Corrections ................................. 30
United States Navy ............................................... 30
Flag Conditions for U.S. Navy/Marine Corp.
Ashore................................................................... 32
Electrical power research institute (EPRI) ............ 32
Appendix C: Accessories ....................................... 33
Air Probe Accessories........................................... 33
Appendix D: TSI Detection Management
Software DMS........................................................... 34
QUESTempo44/46 ............................................... 34
Communication setup ........................................... 34
Contents

Contents
Up and Running Overview
iv
Downloading data with the QT⁰44/46 ................... 36
Viewing Data in DMS ............................................37
Selecting a session/study...................................... 37
Charts and Graphs in Panel layout view
(PLV) page ............................................................38
Reports and Printing..............................................40
Contact/Service information................................... 41
Technical Support Contacts.................................. 41
Service Contact Information.................................. 41
Returning for Service ............................................ 42
Calibration ................................................................ 42
Warranty ................................................................... 43
List of Figures
1-1: QUESTemp° 44/46............................................... 1
1-2: Keypad explained Turning on/off and basic
operation ........................................................... 3
1-3: Main menu of the QTº44/46................................. 3
1-4: About sensor bar and serial number ................... 5
1-5: Sensors identified ................................................ 6
1-6: Viewing measured data .....................................11
1-7 Setting the air flow for Waterless
Wetbulb sensor ...............................................12
1-8 Run mode indicator............................................. 13
1-9: Wet and Dry screen........................................... 14
1-10: Globe screen .................................................... 14
1-11: WBGTi & WBGTo screen ................................. 14
1-12: RH and H.I/HU screen......................................14
1-13: Air Flow screen on QTº46 ................................14
1-14: Stay times (ACGIH) ..........................................14
1-15: Time & Date screen..........................................15
1-16: Battery & Memory screen ................................. 15
1-17: Navy Stay time screen......................................15
1-18: Flag Conditions for U.S. Navy/Marine
Corp. Ashore................................................... 16
1-19: EPRI Stay time screen...................................... 16
1-20: Main menu with view selected (A) &
measurement screen (B) ................................ 18
1-21: Alignment screen.............................................. 18
1-22: Sunshield & placement of finger cot prior to
RH verification ................................................ 19
1-23: RH alignment with Low % example.................. 19
1-24: RH alignment with High% screen..................... 20
1-25: DMS Report example ....................................... 21
1-26: Report using parallel printer ............................. 22
1-27: Air flow configuration ........................................ 23
1-28: 9-volt battery..................................................... 25
1-29: NiMH rechargeable battery .............................. 26
1-30: Communicating with the QT⁰44/46
and DMS......................................................... 34
1-31: QT⁰44/46 downloading data............................. 35
1-32: Downloading QT⁰44/46 files............................. 36
1-33: Selecting a session........................................... 37
1-34: QT⁰44/46 data in panel layout view ................. 38
1-35: Rearranging panels and saving layout ............. 39
1-36: Sample QT⁰46 report ....................................... 40
List of Tables
1-1: Example of a memory table...............................16

1 Introduction
Up and Running Overview
Introduction
The QUESTemp° 44 and QUESTemp° 46, 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: QUESTemp° 44/46 Heat Stress Monitor
QUESTemp° Models
QUESTemp° 44 and QUESTemp° 46 both measure and calculate the dry bulb, wet bulb, globe,
WBGT indoors, WBGT outdoors, relative humidity, and Heat Index or Humidex.
With the QUESTemp° 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 QUESTemp° 46 is an optional detachable probe for measuring air
velocity to determine appropriate levels of indoor thermal comfort monitoring.
Introduction

Getting Started
Up and Running Overview
2
Getting Started
Up and Running Overview
1. Place the QUESTemp° 44/46 Heat Stress Monitor 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 data logging. Use the arrow keys to set the display to
the desired items.
Keypad Operation
The unit operates using a keypad with four keys. The I/O Enter key responds when the key is
released while all other keys respond when the key is pressed.
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.
Getting Started

Getting Started
Turning On/Off and Basic Operation
3
Keys
Explanation
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 and identified
Turning On/Off and Basic Operation
To quickly get you started with the QUESTemp° 44/46, 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 for an example).

Getting Started
Placing the QUESTemp 44/46 on the Job Site
4
3. To view different measurements, press the Up or Down arrow key to toggle through the
views.
NOTE: There are five user-selectable languages included in the QUESTemp° 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.
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 QUESTemp° 44/46 on the Job Site
The QUESTemp° 44/46 should be placed at a height of 3.5 feet (1.1 m) for standing individuals
or 2 feet (.6 m) for seated individuals. Tripod mounting is recommended to get the unit away from
anything that might block radiant heat or air flow. 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.

Sensors
About the Sensor Bar
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 products. 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.
Serial number and sensor
bar number label
Sensors

Sensors
Dry Bulb Thermometer
6
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

Remote, Sensors 2 and 3
Tri-sensor Weighted Average
7
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 7243:2017, 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 = (WBGThead + (2 x WBGTabdomen) + WBGTankles)/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 three sensor sets are connected.
Remote Sensors

Measurements
Waterless Wetbulb
8
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 QUESTemp° 46 model, you can measure air flow, 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 Detection Management Software (DMS).
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 air flow to provide the waterless wetbulb
estimate.
Computing Waterless Wetbulb and Wind Speed
When computing the waterless wetbulb, you can increase accuracy by setting the air flow to the
current environments wind speed. The recommended air flow 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 5 mph,
then enter 5*.447 = 2.2 meters/sec.)
If you are using the QUESTemp°46 with the Air Probe attached, you would not set the air flow
setting. (It will automatically calculate with the current reading.)
See “Setup for Waterless Wetbulb measurement” for details on setting the Air flow.
Measurements

Measurements
WetBulb Globe Temperature
9
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 workloads.
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.
Air Flow
The QUESTemp46 measures air flow if TSI 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. See “Air flow Functionality”for more details.

Measurements
Thermal Comfort
10
Thermal Comfort
Thermal comfort readings for indoor environments are a benefit of Detection Management
Software (DMS) and are not displayed or printed from the instrument directly. Readings are
derived from the dry bulb, relative humidity, mean radiant temperature, air flow, 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 too 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 DMS 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
View
11
Operating QUESTemp° 44/46
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 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)
Index: none, ACGIH, Navy, Marine, EPRI and select either: WBGTi (indoor), WBGTo
(outdoor) for Index setting.
Operating

Operating
Setup for Waterless Wetbulb Measurement (air flow rate)
12
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 (air flow rate)
For the Waterless Wetbulb sensor calculation, an air flow rate (or wind speed) of 0.3 m/s is
recommended and is the default setting of the instrument. NOTE: Only QTº46 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 air flow for Waterless Wetbulb sensor
To Setup Air flow rate
1. In the setup menu, select Flow by pressing the Up/Down Arrow key to select.
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 want 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.

Operating
Reset
13
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”.

Displayed Items
Run
14
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)
WET 80.5ºF 1
DRY 92.2ºF 
Figure 1-9: Wet and Dry screen
Screen 2: GLOBE
GLOBE 92.4ºF 1

Figure 1-10: Globe screen
Screen 3: WBGTi (Indoors)
WBGTo (Outdoors)
WBGTi 84.1ºF 1
WBGTo 107.5ºF 
Figure 1-11: WBGTi & WBGTo screen
Screen 4: RH (Relative Humidity)
H.I. or HU
(Heat Index or Humidex)
RH 66.2 % 1
H.I. 84.3ºF 
Figure 1-12: RH and H.I/HU screen
Screen 5: Air Flow (QTº46 only)
(If turned ON via setup)
FLOW 0.3m/s 1
Figure 1-13: Air Flow screen on QTº46
Screen 6: Stay times (QTº46 only)
L M H VH 1
60 45 30 15 
Figure 1-14: Stay times (ACGIH)
Displayed Items

Displayed Items
Stay Time
15
Screen 7: Time (24 hour format)
Date (day, month, year)
TIME 11:04:13 1
DATE 26-JUN-08 
Figure 1-15: Time & Date screen
Screen 8: BAT (Battery voltage)
MEM (Logging memory available in
days)
BAT 11:04:13 1
MEM 10.4dy 
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). (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.
PHEL_5 3:10 1
PHEL_6 2:10
Figure 1-17: Navy Stay time screen

Displayed Items
Stay Time
16
If Flag is selected, the Flag Conditions for U.S. 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, refer to the
“U.S. Navy/ Marine Corp. Ashore Flag System”.)
HEAT CATERGORY 1
YELLOW FLAG 
Figure 1-18: Flag Conditions for U.S. Navy/Marine Corp. Ashore
If EPRI is selected, the recommended working hours are shown based on a maximum of four
hours. Working hours for Light (L), Moderate (M), and Heavy (H) workload categories are
displayed below.
NOTE: “4:01”indicates greater than four hours.
L M H 1
4:01 3:00 1:30
Figure 1-19: EPRI Stay time screen
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.
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
Table 1-1: Data logging (or memory table) table example
U.S. Navy/Marine Corp. Ashore
flag condition screen
Light, Medium, and Heavy
maximum hours displayed