Extech HW30 - Manual

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/

1

o

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.