TSI Instruments QUESTemp 32 User manual

iii Table of Contents
Table of Contents
Up and Running............................................ 1
Check Wick and Fill Natural Wet Bulb.............. 1
Measurements............................................... 2
QUESTemp32.................................................. 2
Wet Bulb Globe Temperature ........................... 2
Heat Index / Humidex ........................................ 3
Keypad Operation......................................... 4
Displayed Items ............................................ 4
Placement for Monitoring/Testing .............. 6
Sensors.......................................................... 6
Natural Wet Bulb Thermometer........................ 6
Globe Thermometer........................................... 6
Dry Bulb Thermometer ...................................... 7
Relative Humidity Sensor .................................. 7
Remote, Sensors 2 and 3............................. 8
Tri-Sensor Weighted Average........................... 8
Operational Check........................................ 8
Power Options .............................................. 9
9-V Alkaline Battery Replacement.................... 9
Approved 9-Volt Batteries.................................. 9
NiMH Battery Pack........................................... 10
Appendix A: Specifications ...................... 11
Measurements .................................................11
Languages........................................................11
Housing.............................................................11
Size ...................................................................11
Weight...............................................................11
Sensor Types ...................................................11
Accuracy ...........................................................11
Operating Temperature Range.......................11
Remote Sensor Bars .......................................11
Power Options..................................................12
Battery Life........................................................12
Charge Time (NiMH Battery Pack)................. 12
Safety Approvals.............................................. 12
Product Markings .............................................12
Batteries............................................................12
Appendix B: Heat Exposures Tables........ 13
ACGIH...............................................................13
United States Navy ..........................................14
Electrical power research institute (EPRI)......16
Appendix B: Accessories .......................... 17
Contact/Service information...................... 18
Technical Support Contacts ............................18
Service Contact Information............................18
Returning for Service .......................................19
Calibration.........................................................19
Warranty ...................................................... 20

iv Table of Contents
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1 Up and Running
Check Wick and Fill Natural Wet Bulb
Up and Running
1. Make sure the wet bulb’s wick is clean. Fill the reservoir with distilled
water. (DO NOT use ordinary tap water).
2. Place the QUESTemp° in the work area in a safe location approximately
3.5 feet off the ground.
3. 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.
4. Use the arrow keys to set the display to the desired items.
5. Allow 10 minutes for the sensors to stabilize to the environment before
taking readings.
Check Wick and Fill Natural Wet Bulb
The QUESTemp 32 uses a cotton wick immersed into a reservoir containing distilled
water. DO NOT use ordinary tap water, as the contaminants that are left behind
after evaporation will shorten the life of the wick and cause high readings. If the wick
is discolored, it should be replaced. To replace the wick, slide the old wick off the
top of the sensor. Place a new wick over the sensor, making sure that the bottom of
the wick is down in the reservoir.
Wick
Reservoir cover
Reservoir
Filling wet bulb reservoir
1. Remove reservoir cover and fill with
distilled or de-ionized water.
2. Replace reservoir cover.
Figure 1-1: Filling wet bulb reservoir
Up and Running

2 Measurements
QUESTemp32
Measurements
QUESTemp32
The QUESTemp32 portable area heat stress monitor computes the Wet Bulb
Globe Temperature (WBGT). The WBGT is an accepted measurement for
determining the heat stress level imposed on an individual in a given environment.
The QUESTemp32 measures three parameters: ambient or dry bulb temperature
(DB), natural wet bulb temperature (WB), and globe temperature (G).
In addition to the WBGT, the QUESTemp32 measures relative humidity (RH) and
computes the Heat Index (HI) or Humidex. The QUESTemp32, using inputs on the
side of the instrument, has the ability to connect to two additional sensor arrays for
monitoring up to three locations simultaneously.
Wet Bulb 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)
NOTE: The resulting WBGT can be compared to indices of work-rest regimens
(stay times) based upon the work loads. (See Appendix A for published
heat exposure tables.)
Measurements

3 Measurements
Heat Index / Humidex
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
constant temperature, if the humidity rises, so does 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 is used primarily in Canada and is very similar to 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.

4 Keypad Operation
Heat Index / Humidex
Keypad Operation
The unit operates using a membrane 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 enter setup changes.
While viewing live readings, pressing and releasing the key
will cause the display to view the next available sensor bar
(indicated in the upper right corner of the display).
Up Arrow key
Changes which items appear in the display. Scrolls up.
Down Arrow key
Changes which items appear in the display. Scrolls down.
Setup key
Allows changing the setup parameters. Three parameters
are available: Celsius or Fahrenheit, the language, and
Heat Index or Humidex. Press setup to access the
parameters. Use the arrow keys to switch between the two
parameters. Use the enter key to change the parameters.
Press setup again to exit.
Displayed Items
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. W indicates the weighted average which only
appears if a WBGT is displayed and all three sensor bars are attached.
Keypad
Operation

5 Displayed Items
Heat Index / Humidex
The following measurements can be accessed on the display:
Screen 1: WET (Wet bulb)
DRY (Dry bulb)
WET 80.5ºF 1
DRY 92.2ºF
Screen 2: GLOBE
GLOBE 92.4.ºF 1
Screen 3: WBGTi (Indoors)
WBGTo (Outdoors)
WBGTi 84.1 º F 1
WBGTo 107.5 º F
Screen 4: RH (Relative Humidity)
H.I. or HU
(Heat Index or Humidex)
RH 66.2 % 1
H.I. 84.3ºF

6 Placement for Monitoring/Testing
Natural Wet Bulb Thermometer
Placement for Monitoring/Testing
The QUESTemp° 32 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 ¼ "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.
Make sure that the wet bulb reservoir is filled with distilled water and that the cotton wick
is clean and fully wetted. After adding water or placing the unit in a new environment,
allow ten minutes for the globe and wet bulb readings to stabilize.
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
Sensors
Natural Wet Bulb Thermometer
The natural wet bulb thermometer gives an indication of the effects of humidity on an
individual. Relative humidity and air flow are taken into account by measuring the
amount of evaporative cooling taking place at a thermometer covered with a moistened
wick. The QUESTemp° 32 uses a cotton wick immersed into a reservoir containing
distilled water. DO NOT use ordinary tap water, as the contaminants that are left behind
after evaporation will shorten the life of the wick and cause high readings. If the wick is
discolored, it should be replaced. To replace the wick, slide the old wick off the top of
the sensor. Place a new wick over the sensor, making sure that the bottom of the wick
is down in the reservoir.
Globe Thermometer
The globe thermometer gives an indication of the radiant heat exposure on an individual
due to either direct light 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° 32 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.
As an option, a sensor array with a 6-inch diameter globe is available.
Placement

7 Sensors
Dry Bulb Thermometer
Dry Bulb Thermometer
The dry bulb thermometer 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.
Relative Humidity Sensor
A relative humidity sensor is located in a compartment inside of the sensor bar housing.
Slots in the housing allow air to circulate around the sensor.

8 Remote, Sensors 2 and 3
Tri-Sensor Weighted Average
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° 32 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.
Operational Check
A verification module, model 054-544, may be used to check the operation of the
QUESTemp. Remove the top sensor bar and plug the verification module into the top of
the unit. With the QUESTemp set to read in degrees Celsius, verify that the displayed
readings match those printed on the module within ±0.5C.
If the readings are not within the ±0.5C tolerance, then have the unit serviced and
calibrated.
Remote,
Sensors 2 & 3

9 Power Options
9-V Alkaline Battery Replacement
Power Options
There are 3 options for powering the QUESTemp 32: a 9-volt alkaline battery, a NiMH
(Nickel Metal Hydride) rechargeable 6-cell battery pack, and an AC adapter. A door on
the back of the unit allows the user access to the 9-volt battery. The rechargeable
battery pack is located inside of the unit. If the rechargeable battery pack ever needs to
be replaced, it can be accessed by removing the screws from the bottom panel of the
unit.
The 2-position switch located in the battery
compartment must be set by the user if the power
supply method is changed. The up position is for
the 9 volt battery. The down position allows for
either the AC adapter or the rechargeable batteries.
The AC adapter will trickle charge the rechargeable
batteries if they are in place or it will simply allow
for line power operation of the unit.
9-volt battery
9-V Alkaline Battery Replacement
WARNING:Replace batteries only in a non-hazardous environment.
The 9-volt battery should be replaced or the NiMH battery pack 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
Power Options

10 Power Options
NiMH Battery Pack
NiMH Battery Pack
WARNING: Recharge batteries only in a non-hazardous environment.
The NiMH rechargeable battery pack is charged in the instrument using TSI’s AC
adapter #015-910. A discharged battery pack requires an “overnight” charge of
16 hours. Leaving the AC adapter plugged in for extended lengths of time or when
operating the instrument will not harm the rechargeable batteries.
Battery Pack
NIMH Battery
To install: Slide into case and
plug in connector as shown.

Appendix A: Specifications
11
Appendix A: Specifications
Measurements
Globe, dry bulb, wet bulb, WBGTin, WBGTout, WBGT weighted average (if 3
sensor sets), relative humidity, Heat Index, Humidex.
Temperatures given in Celsius or Fahrenheit.
Languages
English, French, Spanish, Italian, German.
Housing
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.
Size
Height 9.2 in. (23.5 cm); Width 7.2 in. (18.3 mm); Depth 3.0 in. (7.5 mm)
Dimensions include mounted sensor assembly.
Weight
2.6 lbs. (1.2 kg) with mounted sensor assembly.
Sensor Types
Temperature: 1000 ohm platinum RTD
Humidity: Integrated circuit with capacitive polymer sensor
Accuracy
Temperature: ±0.5C between 0C and 120C
Relative Humidity: ±5% between 20 to 95% (non-condensing)
Operating Temperature Range
Sensor Assembly: -5C to +100C
Electronics: -5C to 60C
Remote Sensor Bars
2 x 15-pin D-sub jacks are located on the side of the unit for plugging in one or
two additional sensor bars by using remote cables up to 200 feet (61 m). The
top sensor bar can also be remote with a cable.
Appendix A

Appendix A: Specifications
12
Power Options
9V alkaline, 7.2V NiMH rechargeable pack (charged in the unit), or AC adapter
wall power cube (AC adaptor will operate the unit or recharge the NiMH battery
pack).
Battery Life
9V alkaline: 140 hours
Rechargeable Nickel Metal Hydride: 300 hours
(Adding additional sensor bars reduces battery life.)
Charge Time (NiMH Battery Pack)
16 hours (charge in the unit)
Safety Approvals
CE mark
Product Markings
The year of manufacture is determined by the third character in the
instrument’s serial number. “A” was manufactured in 2001, “B” in 2002, “C” in
2003, “D” in 2004 and so forth.
Batteries
Only the following battery types may be used:
Non-rechargeable battery
Type
Manufacturer
U9V
Ultralife
MN1604
Duracell
522 or EN22 or 6LR61
Energizer
A1604 or BR232
Rayovac
6LR61 or 6AM6
Panasonic
Rechargeable battery
Integral NiMH battery pack type DC2121
The rechargeable battery may only be recharged with class 2 charger, rated 9 VDC,
1 A max.

Appendix B: Heat Exposures Tables
13
Appendix B: Heat Exposures Tables
ACGIH
Screening Criteria for Heat Stress Exposure. WBGT values in C.
NOTE: According to the ACGIH’s guidelines, the temperature values represent
a work and rest process which is explained in the standards. Refer to
the ACGIH TLV’s and BEIs for specific details.
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
*Values not specified by ACGIH have been estimated for continuity.
Cited from "American Conference of Governmental Industrial Hygienists - Threshold
Limit Values and Biological Exposure Indices for 2008"; Reprinted with permission
from ACGIH
Appendix B

Appendix B: Heat Exposures Tables
14
United States Navy
Physiological Heat Exposure Limits (PHEL) Time Table
(Without the presence of fuel combustion gases/fuel vapors) is displayed on the
following page.
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)
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
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

Appendix B: Heat Exposures Tables
15
WBGT(F)
I
II
III
IV
V
VI
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

Appendix B: Heat Exposures Tables
16
Electrical power research institute (EPRI)
The recommended working hours are shown based on a maximum of four hours. A
time of 4:01 indicates greater than 4 hours.
WBGT°C
Light
Moderate
Heavy
28
4:01
4:01
3:00
29
4:01
4:00
2:00
30
4:01
3:00
1:30
31
4:01
2:00
1:15
32
4:00
1:30
1:00
33
3:30
1:15
0:45
34
3:00
1:00
0:40
35
2:30
0:53
0:35
36
2:00
0:45
0:30
37
1:45
0:40
0:25
38
1:30
0:35
0:20
39
1:15
0:33
0:18
40
1:00
0:30
0:15
41
0:53
0:28
0
42
0:45
0:25
0
43
0:38
0:23
0
44
0:30
0:20
0
45
0:28
0:18
0
46
0:25
0:15
0
47
0:23
0
0
48
0:20
0
0
49
0:18
0
0
50
0:15
0
0