3M 36, 34 User Manual

5 (1)
3M 36, 34 User Manual

3M Personal Safety Division

3MQUESTemp°Heat Stress Monitors

Robust Construction

©3M 2013. All Rights Reserved

From the

Market

QUESTempo 34 and QUESTempo 36 User Manual

 

Contents

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 key…………………………………………………………………………………..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 and 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

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 Battery Pack ...........................................................................................................

19

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

20

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

22

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

23

ACGIH ..............................................................................................................................

23

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

24

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 battery..................................................................................................................

 

18

Figure 1-23:

NiMH rechargeable battery ..............................................................................................

 

19

Figure 1-24:

Communicating to DMS...................................................................................................

 

28

Figure 1-25:

Downloading with the QT 34/36 ......................................................................................

 

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

Introduction

1 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, 3MTM Detection Management Software (DMS).

With the QUESTempº 36, you have the capability to display stay times in order to manage work/rest regimens. Guidance is based on the screening criteria for heat stress as defined in the ACGIH TLV Handbook, U.S. Navy PHEL charts, and 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.

QTº36 model with (optional) air-probe attachment

Figure 1-1: QUESTempº 36 model

Getting started

2 Getting Started

Up and Running overview

Getting Started

Up and Running overview

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

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

2.Place the QUESTempº 34 & 36 in the work area in a safe location approximately 3.5 feet off the ground.

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

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

5.In the main menu, View will be selected (an indicator arrow denotes the selected menu). Press the I/O Enter key to select.

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

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

3 Getting Started

Keypad Operation

Keypad Operation

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

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/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.

NOTE: the QUESTempº 34 & 36 models have the same keypad. Figure 1-2 is an example of the QUESTempº 36 model with the optional air-probe attachment.

I/O Enter key

Up arrow key

Run/Stop key

Down arrow key

Figure 1-2: Keypad explained

4Placement for Monitoring/Testing

Turning On/Off and Basic Operation

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.

VIEW PRINT SETUP RESET

Indicator arrow

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

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 Wet 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 selectable languages. 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 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 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.

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

Sensors

5 Sensors

Natural Wet Bulb Thermometer

A B C

A. Globe thermometer

Sensors B. Natural wet bulb thermometer C. Dry bulb thermometer

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.

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.

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 1-4: Filling wet bulb reservoir

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.

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.

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.

Remote

6Tri-sensor Calculation and Remote Cable

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 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° 36 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.

Removable sensor bar

RS-232

Tri-sensor calc.

Sensor

Bars 2 &3

Figure 1-5: Ports identified

Measurements

7Tri-sensor Calculation and Remote Cable

Wet Bulb Globe Temperature

Measurements

The QUESTemp° 34 & 36 data logging area heat stress monitor directly senses the four parameters: ambient or dry bulb temperature (DB), natural wet bulb temperature (WB), globe temperature (G), and relative humidity (RH).

The QT° 34/ 36 compute the Wet Bulb Globe Temperature (WBGT), stay times for three possible indices (QT° 36 only), 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 QUESTempº 36 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.

Using Detection Management Software (DMS), you can determine the thermal comfort indices, Predicted Mean Vote (PMV) and Predicted Percent Dissatisfied (PPD) (with the QUESTempº 36 model only).

Wet Bulb Globe Temperature

The WBGT is a weighted average of the three temperature sensors, a globe thermometer, a wet bulb thermometer, and a dry-bulb thermometer, using the equations listed below.

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 (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.)

8Tri-sensor Calculation and Remote Cable

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 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, functions similar to the Heat Index concept. 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° 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 environments are 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, 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 DMS software 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”.

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