Extech Instruments Hw30 Users Manual Heat Watch Vendor Version

: Extech-Instruments Extech-Instruments-Hw30-Users-Manual-541821 extech-instruments-hw30-users-manual-541821 extech-instruments pdf

Open the PDF directly: View PDF .
Page Count: 2

HW30 Heat Watch Patent Pending

HW30 v2.3 6/04

Description

Recall Mode

Lap/Split Start/Stop

LCD Display

Introduction

Congratulations on your purchase of the Extech HW30 Heat Watch. Careful use of

this item will provide years of reliable service.

Specifications

Accuracy (Watch) ±5 seconds/24 hours

Accuracy (RH) ±5% (33 to 75% RH), ±7% (1 to 32% and 76 to 99%)

Accuracy (Temp) ±3°F (1.5°C)

Temperature 14 to 122°F (-10 to 50°C)

Resolution 0.1/ 1o C or F

Update Rate 5 seconds in Heat Index Mode, 2 minutes in other modes

Heat Index 70 to 122°F (22 to 50°C)

Humidity 1 to 99% RH

Memory 30 Laps/ 30 Splits

LAP Counter 99 Laps

Battery CR2032

Dimensions 3.1x2.6x0.8" (79x66x23mm)

Weight 3 oz. (85g) with battery

WARNING: Sudden temperature and humidity changes (e.g. going indoors to

outdoors) may cause inaccurate Temperature, Humidity and Heat Index

readings for up to 45 minutes. Until readings stabilize (e.g. stop steadily

increasing or decreasing), users should NOT rely on the Temperature,

Humidity or Heat Index readings of this watch, or on the watches alarm

function in regards to such readings. This watch is NOT a medical device and

users should NEVER rely on readings for medical purposes

Operation

Mode Selection

The HW30 Heat Watch has six different operating modes.

Press the MODE button to switch from one mode to another.

The HW30 will remain in the Heat Index mode for two minutes and then default back to the

clock mode.

Time Date Mode

The time date display

shows current time, day

of week,

date and month. Also displayed are the

alarm and heat index alarm

indicators when they are activated.

Time and date set

Press and hold the RECALL button for 3

seconds to set time and date.

Press START to zero seconds.

Press LAP to select minutes, Press

START to change minutes.

Press LAP to select hours, Press START

to change hours.

Press LAP to select minutes, Press

START to change minutes.

Press LAP to select year, Press START

to change year.

Press LAP to select month, Press START

to change month.

Press LAP to select date, Press START

to change date.

Press LAP to select 12H/24H, Press START to change.

Press RECALL to exit time set mode.

The HW30 will return to display mode after 30 seconds of inactivity.

HEAT INDEX MODE

In heat index mode the HW 30 displays

relative humidity and ambient temperature

(in °F or °C). Using these two readings, the

HW30 also calculates and displays the

Heat Index. (Please visit our web site for

more information on heat index and the

effects of excessive heat on the human

body.)

SETTING UNITS OF MEASURE

From heat index mode screen

Press LAP to change unit of measure (°F or °C)

HEAT INDEX ALARM SET

The HW30 Heat Watch has a user settable heat index alarm. The Heat Watch will emit a 20

second audible warning when the heat index reaches the level previously set by the user.

To set the alarm

From heat index mode screen

Press and hold RECALL for 3 seconds

Press START to scroll up or LAP to scroll down

Press RECALL to save and exit setup mode.

Or Press START if the alarm level has already been set

The alarm can be stopped by pressing any of the four buttons.

STOPWATCH LAP MODE

Before using be sure to reset stopwatch to

0.00.00.00.

The HW30 Heat Watch lap mode has advanced

features that will make the timing of events or

training sessions easier and more enjoyable.

1. Lap Indicator

The lap indicator flashes to indicate the lap in

progress up to 99 laps.

When LAP is pushed, the lap indicator and lap

time displays (top line of display) freeze for ten

seconds before resuming and displaying next

lap. Bottom display always shows cumulative

time

2. Fastest Lap/Slowest Lap/Average Lap Recall

Once timing session is complete, press

RECALL button to review fastest lap, slowest

lap and average lap times. (based on 99 laps)

Then press START to review individual lap times. (30 laps)

Lap times are shown on top line of the display.

Split times are shown on the bottom line of the display.

3. Memory

The HW30 Heat Watch memory can store up to 30 lap (and split) times.

For detailed instructions on the operation of the lap functions, please refer to the diagram)

STOPWATCH SPLIT MODE

Before using be sure to reset stopwatch to

0.00.00.00.

The HW30 Heat Watch split mode has advanced

features that will make the timing of events or

training sessions easier and more enjoyable.

1. Split time indicator

When SPLIT is pushed the split indicator and

split time displays (top line of display) freeze to

indicate the current split time. Bottom display

continues to always show cumulative time.

2. Fastest Lap/Slowest Lap/Average Lap Recall

Once timing session is complete, press

RECALL button to review fastest lap, slowest

lap and average lap times. (based on 99 laps)

Then press START to review split times. (30

splits)

Split times are shown on the bottom line of the

display. Lap times are shown on top line of the display.

3. Memory

The HW30 Heat Watch memory can store up to 30 split (and lap) times.

HW30 Heat Watch Patent Pending

HW30 v2.3 6/04

TIMER MODE (see diagram)

The HW30 Heat Watch timer mode is a

user programmable countdown timer.

The maximum count down time is 9

hours 59 minutes and 59 seconds. The

minimum settable time is 1 second.

Press START to begin the countdown

Press STOP to stop the countdown

The timer will count down for the

selected duration.

The watch will emit an audible warning

during the final 5 seconds of the

countdown.

The countdown will repeat itself until

stopped by the user. The countdown

sequence will repeat itself and

increment the timer count by one each

time it resumes.

ALARM MODE (see diagram)

The alarm will ring for 30 seconds.

The alarm can be stopped by pressing

any of the buttons

Battery Replacement

Remove the screws from the back of the watch to open unit and battery compartment. The

battery is a Round Button cell Type CR2032. Removing and replacing the battery will cause

loss of all previous settings. Make sure the gasket seal is properly placed before replacing

back cover and tightening screws.

The following is reprinted with permission of the National Oceanic and Atmospheric

Administration.

A National Problem

Heat kills by taxing the human body beyond its abilities. In a normal year, about 175

Americans succumb to the demands of summer heat. Among the large continental family of

natural hazards, only the cold of winter -- not lightning, hurricanes, tornadoes, floods, or

earthquakes -- takes a greater toll. In the 40-year period from 1936 through 1975, nearly

20,000 people were killed in the United States by the effects of heat and solar radiation. In

the disastrous heat wave of 1980, more than 1,250 people died. And those are the direct

causalities. No one can know how many more deaths are advanced by heat wave weather

-- how many diseased or aging hearts surrender, that under better conditions would have

continued functioning. North American summers are hot; most summers see heat waves in

one section or another of the United States. East of the Rockies, they tend to combine both

high temperatures and high humidity although some of the worst have been

catastrophically dry.

Considering this tragic death toll, the National Weather Service has stepped up its efforts to

alert more effectively the general public and appropriate authorities to the hazards of heat

waves -- those prolonged excessive heat/humidity episodes. Based on the latest research

findings, the NWS has devised the "Heat Index" (HI), (sometimes referred to as the

"apparent temperature"). The HI, given in degrees Fahrenheit, is an accurate measure of

how hot it really feels when the relative humidity (RH) is added to the actual air

temperature. To find the Heat Index, look at the Heat Index Chart. As an example, if the air

temperature is 95°F (found on the left side of the table), and the relative humidity is 55%

(found at the top of the table), the HI -- or how hot it really feels -- is 110°F. This is at the

intersection of the 95° row and the 55% column. Important: Since HI values were devised

for shady, light wind conditions, exposure to full sunshine can increase HI values by up

to 15°F. Also, strong winds, particularly with very hot, dry air, can be extremely

hazardous. Note on the HI chart the shaded zone above 105°F. This corresponds to a

level of HI that may cause increasingly severe heat disorders with continued exposure

and/or physical activity.

Heat Index / Heat Disorders

Heat Index / Heat Disorders

Heat Index Possible heat disorders for people in higher risk groups

130°F or higher Heatstroke/sunstroke highly likely with continued exposure.

105° - 130°F Sunstroke, heat cramps or heat exhaustion likely, and heatstroke

possible with prolonged exposure and/or physical activity.

90° - 105°F Sunstroke, heat cramps and heat exhaustion possible with prolonged

exposure and/or physical activity.

80° - 90°F Fatigue possible with prolonged exposure and/or physical activity.

The "Heat Index/Heat Disorders" table relates ranges of HI with specific disorders,

particularly for people in the higher risk groups.

WARNING: Sudden temperature and humidity changes (e.g. going indoors to

outdoors) may cause inaccurate Temperature, Humidity and Heat Index readings for

up to 45 minutes. Until readings stabilize (e.g. stop steadily increasing or

decreasing), users should NOT rely on the Temperature, Humidity or Heat Index

readings of this watch, or on the watches alarm function in regards to such readings.

This watch is NOT a medical device and users should NEVER rely on readings for

medical purposes.

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of

defects in parts and workmanship for one year from date of shipment (a six month

limited warranty applies on sensors and cables). If it should become necessary to

return the instrument for service during or beyond the warranty period, contact the

Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our

website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’

to request an RA number). A Return Authorization (RA) number must be issued

before any product is returned to Extech. The sender is responsible for shipping

charges, freight, insurance and proper packaging to prevent damage in transit. This

warranty does not apply to defects resulting from action of the user such as misuse,

improper wiring, operation outside of specification, improper maintenance or repair, or

unauthorized modification. Extech specifically disclaims any implied warranty of

merchantability or fitness for a specific purpose and will not be liable for any direct,

indirect, incidental or consequential damages. Extech's total liability is limited to repair

or replacement of the product. The warranty set forth above is inclusive and no other

warranty, whether written or oral, is expressed or implied.

Copyright © 2003 Extech Instruments Corporation

All rights reserved including the right of reproduction in whole or in part in any

form.