3M 36, 34 User Manual

3M Personal Safety Division

3M™ QUESTemp°™Heat Stress Monitors

Robust Construction

From the

Market Leader

QUESTemp

34 and QUESTemp

36 User Manual

i Table of Contents

Table of Contents

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

QUESTempº Models .......................................................................................................... 1

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

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

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

I/O Enter k ey …………………………………………………………………………………..3 Up Arrow key………………………………………………………………………………….3 Down Arrow key………………………………………………………………………………3 Run Stop key………………………………………………………………………………….3 Escaping/moving back one screen…………………………………………………………3

Turning On/Off and Basic Operation ................................................................................. 4

Placement for Monitoring/Testing .................................................................................... 4

Sensors .............................................................................................................................. 5

Natural Wet Bulb Thermometer ......................................................................................... 5

Check Wick an d Fill Natural Wet Bulb 5

Globe Thermometer .......................................................................................................... 5

Dry Bulb Thermometer ...................................................................................................... 5

Relative Humidity Sensor .................................................................................................. 5

Tri-sensor Calculation and Remote Cable ....................................................................... 6

Tri-sensor Weighted Average ............................................................................................ 6

Wet Bulb Globe Temperature ............................................................................................ 7

Stay Times/Rest Times (QTº36 only) ................................................................................ 7

Heat Index/Humidex .......................................................................................................... 8

Air Flow ............................................................................................................................. 8

Thermal Comfort (QUESTempº 36 model only) ................................................................ 8

Operating QUESTempº 34 & 36 ........................................................................................ 9

View ................................................................................................................................... 9

Setup ................................................................................................................................. 9

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

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

Contents

Run ...................................................................................................................................11

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

Stay Time .........................................................................................................................13

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

Printing ..............................................................................................................................14

Serial ................................................................................................................................14

Parallel .............................................................................................................................14

Air Flow functionality .......................................................................................................16

Operating sequence .........................................................................................................17

Data Logging Air Flow ......................................................................................................17

Batteries for Air Probe ......................................................................................................17

Operational Check ............................................................................................................17

Power options ...................................................................................................................18

9-Volt Alkaline Battery Replacement ................................................................................18

Approved 9-Volt Batteries .................................................................................................18

NiMH Batte ry Pack ...........................................................................................................19

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

Product markings and special conditions ......................................................................22

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

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

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

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

Electrical power research institute (EPRI) ........................................................................26

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

Air Probe Accessories ......................................................................................................27

Appendix D: Detection Management Software DMS ....................................................28

DMS Quick overview ........................................................................................................28

Downloading your sessions in DMS .................................................................................28

Viewing/Analyzing and Quick Reporting in DMS ..............................................................30

Reporting and Printing ......................................................................................................31

Customer service ..............................................................................................................32

Contacting 3M Instrumentation .........................................................................................32

International customers ....................................................................................................32

Calibration .........................................................................................................................32

Warranty ............................................................................................................................32

List of Figures and Tables

Figure 1-1: QUESTempº 36 model ....................................................................................................... 1

Figure 1-2: Keypad explained .............................................................................................................. 3

Figure 1-3: Main menu of the QUESTempº 34 & 36 .............................................................................. 4

Figure 1-4: Filling wet bulb reservoir .................................................................................................... 5

Figure 1-5: Ports identified .................................................................................................................. 6

Figure 1-6: Viewing measured data ..................................................................................................... 9

Figure 1-7: Setup selected in main menu ............................................................................................. 9

Figure 1-8: Run mode indicator .......................................................................................................... 11

Figure 1-9: Wet and Dry screen .......................................................................................................... 11

Figure 1-10: Globe screen .................................................................................................................... 12

Figure 1-11: WBGTi & WBGTo screen ................................................................................................... 12

Figure 1-12: RH and H.I/HU screen ...................................................................................................... 12

Figure 1-13: Air Flow screen ................................................................................................................ 12

Figure 1-14: Stay times (ACGIH) .......................................................................................................... 12

Figure 1-15: Time & Date screen ......................................................................................................... 12

Figure 1-16: Battery & Memory screen ................................................................................................. 12

Figure 1-17: Navy Stay time screen ...................................................................................................... 13

Figure 1-18: EPRI Stay time screen ...................................................................................................... 13

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

Figure 1-19: Sample printout (page 1) ................................................................................................. 14

Figure 1-20: Sample printout (page 2) ................................................................................................ 15

Figure 1-21: Air flow configuration ...................................................................................................... 16

Figure 1-22: 9-volt batte ry.................................................................................................................. 18

Figure 1-23: NiMH rechargeable battery .............................................................................................. 19

Figure 1-24: Communicating to DMS ................................................................................................... 28

Figure 1-25: Downloading with the QT⁰34/36 ...................................................................................... 29

Figure 1-26: Data Finder page (Analyze/Quick Report options) ............................................................. 30

Figure 1-27: Data layout page (displays your data in charts and graphs) ............................................... 30

Figure 1-28: Reporting and printing .................................................................................................... 31

1 Introduction

QTº36 model with (optional)

Introduction

Up and Running overview

Introduction

The QUESTempº 34/36 models are portable heat stress monitors that are designed to be rugged, easy-to use instruments to quickly and accurately assess the potential for individual heat stress based on environmental conditions.

QUESTempº Models

The QUESTempº 34 and QUESTempº 36 models measure and calculate the dry bulb temperature, wet bulb temperature, globe temperature, WBGT indoor index, WBGT outdoor index, relative humidity, and Heat Index or Humidex. These models support RS232 communications and works with the optional software analysis program, 3M Detection Management Software (DMS).

With the QUESTempº 36, you have the capability to display stay times in order t o 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 EPRI Action Limits. (Please see Appendix B for detailed chart information.)

An additional feature with the QUESTempº 36 is an optional detachable air-probe for measuring air velocity (wind speed) to determine appropriate levels of indoor thermal comfort monitoring.

Figure 1-1: QUESTempº 36 model

air-probe attachment

2 Getting Started

2. Place the QUESTempº 34 & 36 in the work area in a safe location

3. Power On the QUESTempº34 & 36 and check the battery.

5. In the main menu, View will be selected (an indicator arrow denotes the

7. Use the Up/Down Arrow keys to set the display to the desired items.

Getting started

1. Make sure the wet bulb wick is clean. Fill reservoir with distilled water.

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

6. Press the Run/Stop key to begin storing data.

Up and Running overview

Getting Started

Up and Running overview

See “check wick and fill natural wet bulb”, pg 5.

•

approximately 3.5 feet off the ground.

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

environment.

selected menu). Press the I/O Enter key to select.

Getting Started

I/O Enter key Up arrow key

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.

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/mov ing 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.



NOTE: the

example of the QUESTempº 36 model with the optional air-probe attachment.

Run/Stop key

QUESTemp

º 34 & 36 models have the same keypad. Figure 1-2 is an

Figure 1-2: Keypad explained

Down arrow key

Placement for Monitoring/Testing

Indicator arrow

 VIEW PRINT

Turning On/Off and Basic Operation

To quickly get you started with the QUESTempº 34 & 36 model, 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. Following the model and revision information displayed on the screen, the main menu will appear.

SETUP RESET

Figure 1-3: Main menu of the QUESTempº 34 & 36

2. Press the I/O Enter key (when view is selected) to access the measurement screens.

• The W et and Dry measurements screen will display. (See Figure 1-6, page 9 for

screen example.)

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

 NOTE: There are 5-user selectabl e langu age s. 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.

Placement for Monitoring/Testing

The QUESTempº 34 & 36 model should be placed at a he ight of 3. 5 feet (1.1 m) f or standing individuals or 2 feet (.6m) for seated individuals. Tripod mounting is recommended to get the unit aw ay from any t hin g that mig ht bl ock ra di ant he at or air flow. A 1/4"x 20 threaded bushin g on the bot tom of the inst rum ent all ow s moun ting to a st andar d photograph ic tr i pod. Do not stand c lose to the unit d ur ing sampling.

 NOTE: Before measuring, allow 10 mins. for the sensors readings to stabilize.

Indicates the selected menu option. Then press I/O enter to select or press up/down arrows

Sensors

Wick

Reservoir cover

Reservoir

Filling wet bulb reservoir

A. Globe thermometer

Sensors

Natural Wet Bulb Thermometer

Sensors

Natural Wet Bulb Thermometer

The natural wet bulb thermometer gives an indication of the effects of humidity on an individual. Relative humidity and wind speed are taken into account by measuring the amount of evaporative cooling taking place at a thermometer covered with a moistened wick.

Figure 1-4: Filling wet bulb reservoir

Globe Thermometer

The globe thermometer (left position) gives an indication of the radiant heat e xposure on an individual due to either direct sunl ight or hot objects in the environment. This is accomplished by placing a temperature sensor inside a blackened copper sphere and measuring the temper ature rise. The WBGT inde x is based on the response of a 6 inch diameter globe. The Q UE STemp 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.

Dry Bulb Thermometer

The dry bulb thermomet er (right position) m easures 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 fr om radiant heat.

Relative Humidity Sensor

A relative humidit y sensor is located in a compartment inside of the sensor bar housing. Slots in the housi ng allow air to circulate around the sensor.

B. Natural wet bulb thermometer C. Dry bulb thermometer

Check Wick and Fill Natural Wet Bulb

The QUESTemp uses a cotton wick immersed into a reservoir containing distilled water. Ordinary tap water should not be used, 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.

1. R em ove reservoir cover and fill with distilled or de-ionized water.

2. R eplace reservoir cover.

Tri-sensor Calculation and Remote Cable

Remote

Removable sensor bar

RS-232

Tri-sensor calc.

Tri-sensor Weighted Average

Tri-sensor Calculation and Remote Cable

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 jack s on the side of the i ns trument allow simultaneous monitoring o f up to three sensor arr ays using connect in g c ables.

Cable lengths of up to two hundred feet (61 meters) may be used without a decrease in accuracy prov id ed th e env iro nmen t do es not cont ai n strong electromagn et ic fie lds. The data fr om t hese arrays may be viewed separately or combined into a weighted average WBGT re adi ng 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 t he te m perature in the space surrou nding a worker is not uniform, it is n ec e ss ar y to determine the WBGT index at three he igh ts cor re spo ndin g to th e wor ker' s an kle s, abdo me n and he ad and perform a w eig hted average on tho s e v a lues. It is compu t e d us in g the formula:

WBGTw = (WBGT head + (2 x WBGT abdomen) + WBGT ankles)/4

The QUESTemp° 36 always assign s t he top sensor bar t he double weighting. This calculation is show n if a WBGT disp lay has be en sel ect ed a nd if 3 se nsor sets ar e connected.

Sensor Bars 2 &3

Figure 1-5: Ports identified

Tri-sensor Calculation and Remote Cable

Measurements

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)

Wet Bulb Globe Temperature

Measurements

The QUESTemp° 34 & 36 data logging area heat stress monitor directly senses the four parameters: am b ie nt or dr y bulb temperature (DB), natural wet bulb temperatur e (WB), globe temperature (G) , a nd re lativ e hu mid ity (RH).

The QT° 34/ 36 compute the Wet Bulb Gl ob e Temperature ( WBGT), stay times for three possible indices (QT° 36 only) , and the Heat Index (HI) or the Canadian Humidex. Usin g inpu ts on th e sid e of th e in stru men t, tw o ad diti onal sens or arr ays can monitor up to three location s s i mu ltaneously.

On the QUEST e mpº 36 model, you can measure air flow, in meter s pe r sec ond, by plugging an op t i on a l hot wire anemome ter sensor into a si de j a ck on the unit.

Using Detection Mana geme nt Soft war e (DM S), you can determine the thermal comfort indices, Predicted Mean Vote ( P MV) and Predicted Percent Dissatisf ie d (PPD) (with the QUESTempº 36 mod el only).

Wet Bulb Globe Temperature

The WBGT is a weigh ted av er age of the three tem perat ur e sen sor s, a gl obe thermometer, a wet bulb thermometer, and a dry-bulb thermometer, using the equations lis ted be low .

The resulting WBGT values can then be compared t o i nd i ces of work-rest regimens (stay times) based upon work loads.

Stay Times/Rest Times (QTº36 only)

Stay times represent how long a worker should be able to safely work under heat stress conditions (available on QUESTempº 36 only). Select one of the three indices for displaying and printing from the unit: ACGIH Stay Times, NAVY PHEL’s, or EPRI Action Limits. (For setup, please refer to “Setup” on pages 9 -10. For detailed rest times please refer to charts in Appendix B.)

Tri-sensor Calculation and Remote Cable

Heat Index/Humidex

The Heat Ind ex is determined u si ng the dry bulb tem per ature and relativ e humidity. Based upon charts available from the U.S. National Weather Service, Heat Index represents h ow an average perso n feels relative to c li m at e conditions. For a g iv en temperature , the hi gh er the humi dity , the hi g her the hea t index .

The Heat Ind ex is defined over a temperature range of 70°F - 120°F (21°C - 49°C) and a relative h um idity range of 30 % - 99%. Outsid e of t h i s r ange, the instrum en t w ill show dashes in the dis play for the He at Index .

The Humidex , u se d primarily in Canad a, functions similar t o t he Heat Index concept. The values are slightly diffe re nt. The Humidex is d efined over a temperature range of 70°F - 109°F (21°C - 43°C) and a relativ e hu mid ity r ange of 20% - 99%. Outside of this range, t he i nstrument will s how dashes in the display for the Hum id ex.

Air Flow

The QUESTemp° 36 measures air flow if the 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 “Air Flow Functionality”, page 16 for more details.

Thermal Comfort (QUESTempº 36 model only)

Thermal comfort readings for indoor env iron men ts ar e a benefit of DMS software 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, Pre di ct ed Mean Vote (PMV) a nd P r e dicted Percent Dissatisfie d ( P P D) , h elp predict the the r m a l sa tisfaction level of a person with their indoor environment. The PM V is a rating scale o f +3 to -3 where +3 is much to warm,

-3 is much too cool , and 0 is the rmal ly ne utr al. The P PD re flec t s what per c ent of people in a given location wo ul d be dissatisfied wit h th eir thermal surrou ndings.

The formulas used by DMS software to der ive the PMV and PP D c ome from the internation al st anda rd ISO 773 0 “Moder at e ther mal env iron men ts - Determination of the PMV and PPD indices and specification of the conditions for thermal comfort”.

+ 25 hidden pages