EO 007.01

Quest Temp 34 & 36Thermal environmental monitors

Quest Temp 34 & 36• Measurements: Four Parameters: 1. Ambient or Dry Bulb Temp

(DB), Natural Wet Bulb Temp. (WB), Globe Temp (GT), and Relative Humidity (RH)-commutes Wet Bulb Glob Temp

• Quest temp 34 & 36 data logging area heat stress monitor measures four parameters: DB WB GT and RH

• Computes the wet bulb globe temperature (WBGT) and the heat index

or Canadian Humidex

• Using inputs on the side of the instrument, two additional sensor arrays can monitor up to three locations simultaneously

• On the QUESTemp36 model, you can measure air flow in meters per seconds

Natural Wet Bulb Thermometer

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

• Distilled water used only in reservoir as contaminants in tap water will shorten life of wick and cause high readings

Wet Bulb Globe Temperature

• WBGT is a weighted average of three temperature sensors using the following formulas:

• WBGT (indoor)= 0.7wb + 0.3g• WBGT (outdoor)=0.7wb + 0.2g + 0.1db• Resulting WBGT can then be compared to

published charts showing allowable work rest regimens or cycles for given work loads

Globe thermometer

• Gives indication of the radiant heat exposure on and individual due to either direct light or hot objects in the environment

• Accomplished by placing a temperature sensor inside a blackened copper sphere and measuring the temperature rise

Dry Bulb Thermometer

• Measures the ambient air temperature

• Is used in the outdoor WBGT calculation when a high solar radiant heat load may be present

• White plates surrounding the sensor shield it from radiant heat

Sensors-RH

• Is located in a compartment inside the sensor bar housing

• Slots in housing allow air to circulate around the sensor

Remote, Sensors 2-3

• Top sensor bar may be removed from the instrument and used through a remote cable

• Cable lengths of up to 200 ft may be used without decrease in accuracy

• Two additional sensor bars can be added

• Shelter instrument and remote sensor bar if is measured environment is > 60C or heavy rain

Tri-sensor weighted average

• 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

Heat Index/Humidex• Is determined using the dry bulb temperature and RH

• Based upon charts available through health and welfare Canada

• 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

• Heat index is defined over a temp range of 21ºC - 49ºC (70ºF - 120ºF) and an RH of 30%-99%. Outside this range, instrument will show dashes in the display for heat index

• The Humidex, used primarily in Canada, works on same concept as the heat index. Values slightly different

Operational Mode

Use up arrow and down arrow keys to move the marker in the display in front of desired mode. Pressing the I/O ENTER key will select mode.

Keypad Operation

• I/O enter

• Up arrow

• Down arrow

• Run stop

Keypad Operation

Up Arrow:

Changes which items appear in the display, scrolls up

Keypad Operation

Down Arrow:

Changes which items appear in display, scrolls down

Keypad Operation

Run Stop:

From menu or view modes, pressing this starts or stops the run mode

Pressing this key will exit the setup, print or reset modes

View

• Displays measured data but does not log it

• If more than one set of sensors is plugged into the unit, can be displayed by pressing and releasing I/O ENTER key

• Displayed sensor set is shown in the upper right corner

• Return to the menu by holding down the I/O ENTER key while a 3 second countdown is shown in lower right corner of the display

Setup

• Allows changing temperature units, language, time, date, logging rate and selecting between heat index and Humidex

• Use ARROW keys to select item and the I/O key to change it

• Time and date require using the ARROW and I/O enter keys to modify each number

Setup (Cont)

• Temp-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 (US), Humidex (Can)

• Exit SETUP by pressing RUNSTOP key

Print

• Allows printing to a parallel or serial printer or to a computer

• Unit will recognize 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 to begin printing

• Press RUN STOP to return to menu

Reset

• Allows clearing the logged data from memory

• After entering the RESET mode, clear the memory by holding down the I/O ENTER key while the display counts down from three

• Press RUN STOP to return to the menu

Run

• The run mode begins a session in memory and logs the data

• Begin a session by pressing the RUN STOP key from either menu or from within the VIEW mode

• an asterisk will be in lower right corner indicating that you are in run mode

• End session by again pressing the RUN STOP key or by holding down the I/O ENTER key while a countdown is displayed in the lower right corner

Run (cont)

• If 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 memory fills while running, asterisk in lower left corner of display will become an F and memory remaining screen will show 0.0

Displayed Items

• The number in upper 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 & 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

• Asterisk in the lower left corner indicates unit is in run mode &logging

Displayed Items (Cont)Following measurements can by accessed on display:

• Screen 1: WET (Wet bulb)

DRY (Dry bulb) • Screen 2: GLOBE• Screen 3: WBGTi (Indoors)

WBGTo (Outdoors) • Screen 4: RH (Relative Humidity)

H.I. or HU

(Heat Index or Humidex)• Screen 5: Air Flow

(If turned ON via setup, only on Quest Temp 36)

Displayed Items (Cont)

• Screen 6: Stay times

(QUESTempº 36 only) • Screen 7: Time (24 hour format)

Date (day, month, year)

• Screen 8: BAT (Battery voltage) MEM (Logging memory available in days)

Displayed Items (Cont)

• A series of dashes appear in the display if one of the following occur:

• Humidex is outside of its allowable range

• Temperature is outside allowable range

• A temperature sensor has failed

Data Logging

• Data from each sensor is recorded at the interval set by logging rate

• Every time RUNSTOP pressed, a session is either started or ended in memory

• Each session contains a header with time and date

Printing

• DATA can be sent to computer through serial RS232 port or to a parallel printer

• Serial transmission requires quest cable #54-715. Parallel transmission requires quest cable #56-875

• With cable plugged in, select the PRINT mode from menu and press I/O key to send data. Press key again to abort

Printing (cont)

• Serial-Quest suite software is recommended for downloading

• Parallel-data can be sent directly to parallel printers that accept direct ASCII test input without special drivers

• Ensure that printer is powered on and is ONLINE

PC COMMS

• Quest has flexibility to be set up and controlled through software

• Programmable start/stop time feature is only accessible through computer

• Can send live data while measuring

Operational Check• Remove top sensor bar and plug the

verification module into the top of the unit

• In Celsius, verify that the displayed readings match those printed on the module within + or - 0.5ºC

• If not calibrate

Power Options

3 options:1. 9 volt alkaline, 2. NiMH (nickel metal hydride) rechargeable 16 hrs charge3. AC adaptor

A 2 position switch in the battery compartment must be set by user if power supply method I changed (9v to rechargeable)

Battery Replacement

• Nickel metal hydride to be charged when voltage is below 6.4 (voltage displayed when unit is turned on

• Unit will operate for approx 8 hours on low mode

• When voltage below 6.2, unit automatically turns off

• Alkaline replace only with approved alkaline battery

Using Quest Temp 34 & 36

• Place 3.5 feet for standing individuals or 2 feet for seated individuals

• Tripod mounting is recommended to get unit away from anything that might block radiant heat or airflow

• Do not stand close to unit during sampling

• Ensure wet bulb 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 10 mins for the globe and wet bulb reading to stabilize

Up and Running

1. Ensure wet bulb wick is clean. Fill reservoir with distilled water

2. Place QUEST temp in work area in a safe location approx. 3.5 feet off ground

3. Turn unit on. If battery voltage displayed during the power-on sequence< 6.4, replace or recharge

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

5. Press the RUN STOP key to begin data logging

6. Use arrow keys to set the display to desired items

Using Quest Temp 34 & 36

Conclusion

Questions ???