Axiom Hr400 User manual

HR400

Heart Rate Monitor

Owner’s Manual

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HRM400 3/30/99 10:12 AM Page 1

Performance Inc.

One Performance Way

Chapel Hill, NC 27514

1-800-727-2453

www.performancebike.com

Table of Contents

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

Functions and Features . . . . . . . . . . . . . . . . . . . . . . . . .2

Button Commands and Important Tips . . . . . . . . . . . . . . .3

Positioning the Chest Band/Transmitter . . . . . . . . . . . . . .5

Mounting the Receiver on Your Bike . . . . . . . . . . . . . . . . .5

Setting Up Your HR400 for Use . . . . . . . . . . . . . . . . . . . .6

Displaying your Heart Rate . . . . . . . . . . . . . . . . . . .6

Time of Day and Date with Heart Rate . . . . . . . . . . .6

Setting the Time of Day and Date (Main Screen #1) . . .8

Setting the Daily Alarm (Main Screen #2) . . . . . . . . .9

Setting the Countdown Timer (Main Screen #3) . . . . .9

Setting Your Heart Rate Target Zone . . . . . . . . . . . .12

Setting Your Maximum Heart Rate . . . . . . . . . . . . . .14

Setting the Recovery Timer Upper and Lower Limits . .14

Recovery Heart Rate Time . . . . . . . . . . . . . . . .15

Using Your Axiom HR400 . . . . . . . . . . . . . . . . . . . . . . .17

Countdown Timer . . . . . . . . . . . . . . . . . . . . . . . . .17

Stopwatch (Main Screen #4) . . . . . . . . . . . . . . . . .17

Time in Zone, Data Feedback Screens

(Main Screen #5) . . . . . . . . . . . . . . . . . . . . . . . .18

Activating and Deactivating Alarms . . . . . . . . . . . . .20

Back-Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . .22

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Axiom HR400 Speciﬁcations . . . . . . . . . . . . . . . . . . . . .23

HRM400 3/30/99 10:12 AM Page 2

Introduction

The wireless Axiom HR400 heart rate monitor calculates and

displays heart rate information via radio frequency transmis-

sion from the chest transmitter to the watch receiver.

The Axiom HR400 provides the feedback you need in order

to monitor your training, with functions that help you

increase your ﬁtness and performance.

Combined with an appropriate exercise program, the Axiom

HR400 will help you:

• Control your training

• Reduce your heart rate recovery time

• Increase your aerobic capacity

• Improve your overall ﬁtness

• Improve your exercise performance

The easy-to-read display and simple operation make the

Axiom HR400 very user-friendly!

Caution: Before you start any exercise program you should

consult a physician. If you have a pacemaker or other

implanted electronic device, consult your physician prior

to using a heart rate monitor.

HRM400 3/30/99 10:12 AM Page 4

Button Commands and Important Tips

Not only does the Axiom HR400 have a variety of functions,

it’s also very easy to use. You only need remember a few

basic button commands in order to set and reset values, and

to toggle between the main screens (please refer to the

HR400 logic diagram on pages 10–11 for the complete range

of screens).

To go from any of the ﬁve main screens to another press the

Mode button. The Mode button will cycle the HR400 from

Time of Day, to Daily Alarm, to Countdown Timer, to Stop-

watch, to Time in Zone, and back to Time of Day.

To enter Set Up mode: in any main screen (except Time in

Zone), press and release the Select button. To continue

through each of the set up screens, continue to press and

release the Select button. Note: if the Countdown Timer is

activated, you will not be able to access its set-up screen.

Further, to change a number in a set up screen, press the

Adjust button.

To back up to a previous screen from any set-up screen:

press and release the Light button. The back-light will only

illuminate in a main screen and will not illuminate in a set-

up screen.

To move from a set-up screen to the corresponding main

screen: press and hold the Light button.

The following set-up instructions will take you through the

entire set-up procedure from beginning to end. If you’d like

to program a single function, go to the main screen for that

function and press and release the Select button. Once in

the set-up screen for the speciﬁc function, use the Adjust

button to modify the value. To return to the main screen,

press and hold the Light button.

Functions and Features

1. Current heart rate

2. Current heart rate expressed as a percentage of maximum

heart rate

3. Heart rate upper limit alarm (visible and audible)

4. Heart rate lower limit alarm (visible and audible)

5. Time spent in, above, and below the target zone

6. Time spent in, above, and below the target zone,

expressed as a percentage of total workout time

7. Average heart rate in the target zone

8. Average heart rate for entire workout

9. Time of day (12 or 24 hr.)

10. Daily alarm

11. Month and day calendar

12. Stopwatch

13. Countdown timer with auto repeat option

14. Automatic heart rate recovery timing

15. Electroluminescent back-light

Special features

1. Automatically set maximum heart rate by inputting your

age, or, program a speciﬁc value

2. All limits programmable in single beat increments

3. Each information screen can be viewed at any time during

your workout

4. Easy-to-remember button commands make it easy to pro-

gram and view

5. Transmitter battery is easily replaceable by the user

Figure 1. HR400 Display, all possible LCD segments on. Buttons

are as marked on the display surround.

HRM400 3/30/99 10:12 AM Page 2

Positioning the Chest Band/Transmitter

1. Adjust the strap length to achieve a snug, comfortable

ﬁt.

2. The transmitter should face outward as shown in Fig. 2,

with the band ﬁtting comfortably on the bare chest just

below the breast.

3. Center the transmitter on the chest (with the Axiom logo

right-side up).

4. Moisten the rubber electrodes on the inside of the trans-

mitter (chest band) with water or saliva.

5. Attach the receiver to your wrist or mount it on your

bicycle (see bicycle mounting instructions below).

6. When placed on the body, the transmitter is automatical-

ly activated (and deactivated when removed). To conserve

transmitter battery power, the transmitter should be

removed when not in use.

If you have difﬁculty obtaining a regular heart rate reading,

try readjusting the chest band. Make sure there is sufﬁcient

moisture between the electrodes and your skin. The rubber

electrodes must be ﬂat against the skin, and the band must

be in the correct position—not too low. Check that the

band is clean, with no accumulated sweat or dirt.

Mounting the Receiver on Your Bike

Your HR400 comes with a Handlebar Adapter for your bike.

Slide the split foam ring over your handlebar in a conve-

nient location and wrap the Velcro® Strap snugly around the

foam ring. Your HR400 receiver may now be installed over

the Strap as you would attach it to your wrist.

If you accidentally ﬁnd yourself in a set-up screen and don’t

want to modify the value, remember that all you have to do

is press and hold the Light button to go back out to the

main screen!

Important Tips

1. You must make a long press of the Mode button (in any

main screen except Daily Alarm) before you can get heart

rate readings.

2. If you get into a set up screen by mistake, a long press of

the Light button will always get you back to a main screen.

Successive presses of the Mode button will scroll you

through all main screens.

3. For proper heart rate readings, it is critical that there be

sufﬁcient moisture (water) between the electrodes on the

transmitter and your skin. Insufﬁcient moisture can cause

no reading, frozen readings or erratic readings.

4. Time in Zone data is accumulated only when the

Stopwatch is running. Activate the Stopwatch at the start of

your workout.

5. When using a wireless heart monitor near computers,

motorized gym equipment, electric motors, power lines,

inside of automobiles, televisions and even ﬂuorescent

bulbs, erratic readings may occur.

6. You can wear the Axiom heart monitor when swimming,

but do not push any of the buttons while the receiver

(watch) is underwater.

Figure 2. Correct Transmitter

location on chest, detail of

moistening electrodes.

HRM400 3/30/99 10:12 AM Page 4

Setting Up Your HR400 for Use

Note: Unless noted otherwise, all instructions to press a

button call for a quick press and release.

Displaying your Heart Rate

When in any main screen (except Daily Alarm), press and

hold the Mode button to activate the heart rate function.

The heart symbol and a “zero” heart rate will appear.

After a few seconds, provided that you are wearing the

transmitter chest belt, the lower display row will then show

your heart rate and a ﬂashing heart icon. The upper display

row continues to show main screen information. On the left

side of the screen is a bar with arrows on each end. If all

three segments are displayed, this indicates that your heart

rate is within the target zone. If the bar and the “up” arrow

are displayed, you are operating above the target zone, and

if the bar and the “down” arrow are displayed, you are oper-

ating below your target zone. Target zone set-up is dis-

cussed on page 12. The display will also show your heart

rate expressed as a percentage of your maximum heart rate

(except in the Time in Zone screen, where the percentage of

your workout in the zone is displayed instead). The set-up

screen to enter your maximum heart rate is done later in the

set-up sequence.

To deactivate the heart rate function press and hold the

Mode button. A long period of inactivity (with no heart rate

signals and no button presses for two minutes) will cause

the receiver to switch off automatically.

Note: Even when the receiver is deactivated, the transmitter

will continue to send a signal when it is being worn. To con-

serve transmitter battery power, the transmitter belt should

be removed when not in use.

Time of Day and Date with Heart Rate

Press the Mode button until the time of day is displayed

(see Fig. 4). If the heart rate function has been activated

(by a long press of the Mode button), current heart rate and

percentage of maximum heart rate will be displayed instead

of the date. Once the Heart Rate function has been activat-

ed, the date is not visible from any screen. If you wish to

see the date, you must deactivate the Heart Rate function

with a long press of the Mode button.

Press and hold the Adjust button to toggle between the 12-

and 24-hour formats. If the 12-hour format is selected, the

“PM” symbol will be displayed for times after noon.

If no buttons are pressed, the Time of Day screen will auto-

matically reappear after a few seconds.

Figure 4. Time of Day/Date Main Screen and Set-up screens.

HRM400 3/30/99 10:12 AM Page 6

Setting the Daily Alarm (Main Screen #2)

You can set the Daily Alarm either at the end of the month-

day set-up, or directly from the Daily Alarm main screen.

From either screen, press the Select button (see Fig. 5).

1. When in the Daily Alarm set-up screen, the hours will

ﬂash. Use the Adjust button to set the desired hour. Press

and hold the Adjust button to increase the hours rapidly.

2. Press the Select button again, and the minutes will ﬂash.

Use the Adjust button to set the desired minutes. Press and

hold the Adjust button to increase the minutes rapidly.

3. Press the Select button again to enter the Countdown

Timer set-up screen.

Setting the Countdown Timer (Main Screen #3)

You can set the Countdown Timer after the Daily Alarm set-

up, or directly from the Countdown Timer main screen. From

Setting the Time of Day and Date

(Main Screen #1)

Note: At any time while in the set-up screens, a press of

the Light button sends you back to the previous screen. At

any stage of the set-up procedure, press and hold the

Light button to return to the main screen.

1. When in the Time of Day screen, press the Select button

to enter the time set-up screen (see Fig. 4). The seconds

will ﬂash. Press the Adjust button to zero the seconds.

2. Press the Select button again to set the hours. The hours

will ﬂash. Press the Adjust button to advance the hours.

Holding the Adjust button causes the hours to increase

rapidly.

3. Press the Select button again to set the minutes. The

minutes will ﬂash. Press the Adjust button to advance the

minutes. Holding the Adjust button causes the minutes to

increase rapidly.

4. Press the Select button again to set the month. The

month will ﬂash, press the Adjust button to advance the

month. Holding the Adjust button will cause the month to

increase rapidly.

5. Press the Select button again to set the day, and set the

day of the month in the same manner as setting the month.

6. From the Day set-up screen, one more press of the Select

button advances to the Daily Alarm set-up screen.

Figure 5. Daily Alarm Main Screen and Set-up screens. Figure 6. Countdown Timer Main Screen and Set-up screens.

HRM400 3/30/99 10:12 AM Page 8

1110

Full Axiom HR400 logic diagram

HRM400 3/30/99 10:12 AM Page 10

2. When the high limit has been set, press the Select button

to advance to the low limit. The “down” arrow will be dis-

played and the lower row of digits will ﬂash. If you have

already entered your age or maximum heart rate, low will

accurately be displayed as a percentage of your maximum

heart rate.

3. Press the Adjust button to decrease the low limit in sin-

gle beat increments. Press and hold the Adjust button to

rapidly decrease the low limit. The displayed percentage of

maximum heart rate will change as the low limit changes, so

you can also set the low limit by percentage of maximum

either screen, press the Select button (see Fig. 6). Note: The

timer must be turned off to set it (see page 17) and it can-

not be set for less than 10 seconds. If the Heart Rate func-

tion has been activated it will disappear from the screen

during set up.

1. To set the Countdown Timer, press the Select button. The

hours will ﬂash. Press the Adjust button to advance the

hours. To advance rapidly, press and hold the Adjust button.

2. Press the Select button again, and the minutes will ﬂash.

Press the Adjust button to advance the minutes. To advance

rapidly, press and hold the Adjust button.

3. Press the Select button again, and the seconds will ﬂash.

Press the Adjust button to advance the seconds. To advance

rapidly, press and hold the Adjust button.

4. Press the Select button again to enter the Auto-

Repeat/Single selection screen. Press the Adjust button to

toggle between Auto and Single. When Auto-Repeat is

enabled, the word “Auto” appears. In single mode the posi-

tion is blank.

The Auto-repeat (“Auto”) function means the timer will

continually recycle for the pre-set time each time the

timer counts down to zero. At that point, the unit will

emit a series of beeps for 10 seconds to let you know a

new cycle has started. The beeper can be silenced by push-

ing any button. Further, “single” means the timer will

count down from the pre-set value and stop at 0:00:00.

Another press of the Select button will bring you to the

heart rate training zone limit set-up screen.

Setting Your Heart Rate Target Zone

From the Countdown Timer set-up screen or the Stopwatch

main screen (Main Screen #4), press the Select button (see

Fig. 7). In the Target Zone set-up screen, the high limit will

be ﬂashing, and will be displayed in the upper row. The low

limit will be displayed in the lower row. The “up” arrow will

be showing, indicating that a press of the Adjust button will

modify the high limit. If you have already entered your age

or maximum heart rate (see page 14), the high limit will

accurately be displayed as a percentage of your maximum

heart rate.

1. Press the Adjust button to increase the high limit in sin-

gle beat increments. Press and hold the Adjust button to

rapidly increase the high limit. The displayed percentage of

maximum heart rate will change as the high limit changes,

so you can also set the high limit by percentage of maxi-

mum heart rate (the maximum heart rate value must ﬁrst be

programmed, see p. 14).

Figure 7. Stopwatch Main Screen and Set-up screens.

HRM400 3/30/99 10:12 AM Page 12

six seconds). This recovery time is also available in the

Recovery Time screen, which can be accessed from the Time

in Zone main screen. Note: Any stored recovery time value

will automatically be cleared the next time your heart

rate goes above the high recovery limit.

When the recovery timer is running, the "RCY" icon will

ﬂash and be visible in all main screens.

1. To enter the Recovery Timing set-up screen from the

User’s Age/Maximum Heart Rate set-up screen (see Fig. 7),

press the Select button. In the Recovery Timer set-up

screen, the high recovery limit will be ﬂashing, and will be

displayed in the upper row, and the low recovery limit will

be displayed in the lower row. The “up” arrow will be

heart rate (the maximum heart rate value must ﬁrst be pro-

grammed, see p. 14).

Note:

• There must be a minimum of a ﬁve beat-per-minute differ-

ence between the high limit and low limit. Whenever a new

high limit setting is entered, you may need to reset the low

limit as well.

• If no values are entered within a few minutes the screen

will revert back to the Stopwatch ("STW") main screen (#4).

Press the Select button to advance to the Maximum Heart

Rate set-up screen.

Setting Your Maximum Heart Rate

A maximum heart rate value is required for the HR400 to

accurately calculate and display the current heart rate as

a percentage of maximum heart rate.

In the AGE/MHR screen (see Fig. 7), enter user age or maxi-

mum heart rate (if known). If age is entered, the HR400 will

calculate an approximate maximum heart rate (the unit cal-

culates your maximum heart rate as: Max HR = 220 – AGE).

1. Press the Adjust button to advance the ﬂashing digits.

When the digits are below 100, “AGE” will be displayed (and

the number will be interpreted as an age). When the digits

are above 100, “MHR” is displayed (and the number will be

interpreted as a maximum heart rate). To increase the digits

rapidly, press and hold the Adjust button.

The total age range is from 10 to 99, and the actual maxi-

mum heart rate value setting range is from 121 to 240.

Note: if no values are entered within a few minutes the

screen will revert back to the Stopwatch ("STW") main

screen (#4).

2. Press the Select button to advance to the Recovery set-

up screen.

Setting the Recovery Timer Upper and

Lower Limits

The Axiom HR400 automatically measures the time it takes

for your heart rate to descend from the preset high recovery

limit to the preset low recovery limit. When your heart rate

crosses the threshold below the high recovery limit, the

recovery timer starts. When your heart rate falls below the

low recovery limit, the recovery timer stops. When this hap-

pens, the HR400 will emit a series of rapid “bleeps” and the

current screen contents are temporarily replaced with the

recently measured recovery time (which will be displayed for

Recovery Heart Rate Time

What is recovery heart rate time? Why would you want to

know your recovery time? Recovery time refers to the time

it takes for your heart rate to go from a higher reading to

a lower one after you have ﬁnished your workout, and if

used in a consistent way tells you something about your

ﬁtness level. In general, as your recovery time decreases,

your ﬁtness is improving. Or, for example, if you have a

particularly slow recovery time after a workout, it may

indicate that you’re more tired, or overtrained.

One thing to remember is that when using recovery time

as a measure of ﬁtness, it’s only a measure of your ﬁtness

relative to an earlier state. It is not at all useful to com-

pare rates from one person to another. Also, for the rela-

tive measurements to be meaningful, you should compare

readings only after a similar intensity workout on the

same course. A hard day in the hills will give you a very

different reading than an easy day on the ﬂats. Your activ-

ity level during your cool down period will affect the

recovery time.

The setting of the upper and lower limits of the recovery

heart rate function will depend on the heart rate range

that you will be exercising in. As an example, let’s assume

you have set the upper and lower target zone settings at

160 beats per minute (bpm) and 130 bpm respectively,

and that your resting heart rate is normally around

60bpm. You might want to set your recovery limits at

100bpm for the high and 85bpm for the low. If you set the

lower recovery limit too near your resting heart rate, the

recovery phase may take hours, instead of minutes.

We recommend that you experiment with values that will

make the recovery time a useful number for your applica-

tion. Again, it’s only a comparative value with your earlier

efforts, and not a meaningful number in itself.

HRM400 3/30/99 10:12 AM Page 14

Using Your Axiom HR400

Countdown Timer

1. To operate the Countdown Timer (see Fig. 9), you need to

have entered values in the set up screens. Go to the

Countdown Timer Main Screen (#3). The “TMR” icon will

show on the screen. If the heart rate function has been

activated, current heart rate and % of maximum heart rate

will also appear on the screen.

2. To start/stop the countdown timer, press the Adjust but-

ton. When the countdown timer is running, the "TMR" icon

will ﬂash in all main screens. You can start, stop and clear

the countdown timer only from the Countdown Timer main

screen.

When the countdown timer runs down to zero, the alarm

sounds for 10 seconds. The alarm can be silenced by press-

ing any button (the normal function of that button will not

be performed). After the countdown timer runs down to

zero, it is automatically reset to the countdown time. If the

optional Auto-Repeat function has been selected, the

countdown timer automatically restarts.

3. To clear the countdown timer (to zero) and to disable the

alarm, press and hold the Adjust button while in the

Countdown Timer main screen.The timer must be deactivat-

ed in order to clear the timer value. This completely clears

the countdown timer and it will not run until a new count-

down time value has been entered.

Stopwatch (Main Screen #4)

1. To operate the stopwatch: From any main screen, press

the Mode button until you reach the Stopwatch main screen

(see Fig. 9). The “STW” icon will show on the screen. If the

heart rate function has been activated, current heart rate

and percentage of maximum heart rate will also be shown.

2. To start the stopwatch, press the Adjust button. To stop

the stopwatch, press the Adjust button again. Once the

stopwatch is stopped, it can be reset by pressing and hold-

ing the Adjust button (when you hold the Adjust button,

the stopwatch will initially start running, but will soon

showing, indicating that a press of the Adjust button will

modify the high recovery limit.

2. Press the Adjust button to increase the high recovery

limit in single beat increments. Press and hold the Adjust

button to rapidly increase the high recovery limit.

3. When the high recovery limit has been set, press the

Select button to advance to the low recovery limit. The

“down” arrow will be displayed and the lower row of digits

will ﬂash.

4. Press the Adjust button to decrease the low recovery limit

in single beat increments. Press and hold the Adjust button

to rapidly decrease the low recovery limit.

Note: There must be a minimum of a ﬁve beat-per-minute

difference between the high recovery limit and low recov-

ery limit. Whenever a new high recovery limit setting is

entered, you may need to reset the lower limit as well.

5. If you prefer not to have the recovery function opera-

tional you can effectively disable the function simply by

setting the high limit at 35bpm, and the lower one at

30bpm.

6. To leave the Recovery Timer set-up screen, press the

Select button. You will return to the Time of Day main

screen. If you have been doing the entire set-up sequence,

set-up is now complete.

Figure 8. Countdown Timer

activated (shown with heart

rate activated).

HRM400 3/30/99 10:12 AM Page 16

icons on the right hand side of the screen indicate that this

screen is the “in the zone” screen.

2. Press the Select button to go to the Time Above Target

Zone and Average Heart Rate screen. The percentage of the

total exercise time spent above the target zone is displayed,

along with the average heart rate for the time spent in the

target zone. The maximum duration over which the average

reset). The stopwatch can be started, stopped, and reset

only from the the Stopwatch main screen.

When the stopwatch is running, the "STW" icon will ﬂash in

all main screens.

Please note: Information accumulation of time spent in,

above, and below the target zone will only occur when the

stopwatch is activated. However, when the stopwatch is

cleared, accumulated heart rate data is not reset. To reset

accumulated heart rate data, see p. 20.

Time in Zone/Data Feedback Screens

(Main Screen #5)

In order to use the Data Feedback functions, the stop-

watch must have been activated during your workout

(also, you can view the feedback screens at any time dur-

ing your workout).

Data Feedback functions:

• Time in target zone

• Time above and time below the target zone

• Time in each zone as a percentage of total time

• Average heart rate while in the target zone

• Average heart rate for the total accumulated exercise time

• The most recent recovery time.

Please refer to Fig. 10.

1. From any main screen, press the Mode button until you

reach the Time in Target Zone main screen. The “TiZ” icon

will show on the screen. The time spent in the target zone

is displayed. This time (displayed in hours, minutes, sec-

onds) accumulates automatically whenever the user’s heart

rate falls within the programmed target zone, but only if the

Stopwatch has been activated.

Also displayed on this screen is the current heart rate (if

heart rate monitoring is activated) and the target zone

arrow. The time in the target zone is also displayed as a per-

centage of the total exercise time. The two small arrow

Figure 9. Stopwatch (shown

with heart rate activated).

Figure 10. Time in Zone Main Screen and Feedback screens.

HRM400 3/30/99 10:12 AM Page 18

be activated while the heart icon is displayed. The alarm

icon will be displayed above the heart icon (see Fig. 12). A

tone will sound in rhythm with your heart beat when you

are above or below your Target Zone. To deactivate the

alarm, press and hold the Select button until the alarm icon

disappears from the screen.

Back-Lighting

In all ﬁve of the main screens, press the Light button to

activate the electroluminescent back-light for four seconds.

Note: The back-lighting feature does not work in the set

up screens.

heart rate can be calculated is 9 hours, 59 minutes and 59

seconds. Average heart rate is updated every 10 seconds.

The "AVG" icon is displayed. The small up arrow icon on the

right hand side of the screen indicates that this screen is

the “above the zone” screen.

Press the Select button to go to the Time Below Target Zone

and Total Average Heart Rate screen. The percentage of the

total exercise time spent below the target zone is displayed,

along with the average heart rate for the entire session. The

“TAVG” icon is displayed. The small down arrow icon on the

right hand side of the screen indicates that this is the

“below the zone” screen.

Note: The maximum data accumulation time for all zones

(in, above and below) is 9 hours, 59 minutes, 59 seconds.

After that time, all values in the Data Feedback screens

will ﬂash, and there will be no further calculation, until

the “TiZ” screens are cleared.

To clear data from all of the above three screens, press

and hold the Adjust button while in any of the three

screens. The screens cannot be cleared while the stop-

watch is running.

Press the Select button again to display the most recent

heart rate recovery time. To reset the recovery timer to zero

from this screen, press and hold the Adjust button.

Activating and Deactivating the Alarms

Daily Alarm - To toggle the alarm on and off, press and

hold the Adjust button while in the Daily Alarm main

screen. The alarm icon will appear on the upper right corner

of the display while the alarm is activated (see Fig. 11). The

Alarm can only be toggled on and off from the Alarm main

screen (#2). It can not be toggled on and off during set-up.

The alarm will sound for one minute, unless silenced by

pressing any button. Note: When you press a button to

silence the alarm, the normal function of the button will not

be performed.

Target Zone Limit Alarm - To activate the Target Zone Limit

Alarm, press and hold the Select button while in any main

screen except Daily Alarm. The Target Zone Alarm can only

Figure 11. Daily Alarm

activated.

Figure 12. Target Zone

Alarm activated (shown on

Stopwatch main screen).

HRM400 3/30/99 10:12 AM Page 20

What if the heart rate reading becomes extremely high

(above 200)?

When exercising with your Axiom HR400 heart rate monitor

you may come within range of electromagnetic signals,

causing the heart rate reading to elevate to abnormal levels.

Common sources of electromagnetic signals are high voltage

power lines and motor driven equipment. Signals from other

users transmitter belts (within 80 cm) can also cause incor-

rect readings. Check your surroundings and move away from

the source.

Axiom HR400 Speciﬁcations

Watch/Receiver

Stopwatch resolution: 0.1 sec

Maximum stopwatch time: 9 hr 59 min 59.9 sec

Maximum countdown time: 9 hr 59 min 59 sec

Countdown timer resolution: 1 sec

Heart rate range: 30 to 240 beats per min (bpm)

Range of user age: 10 to 99 years

Range of max heart rate: 121 to 240 bpm

High heart rate limit range: 80 to 240 bpm in steps of 1 bpm

Low heart rate limit range: 30 to 235 in steps of 1 bpm

(or 5 bpm lower than high limit

setting)

High recovery heart rate: 35 to 200 bpm

Low recovery heart rate: 30 to 195 bpm

Heart rate accuracy: ± 1 bpm

Maximum time in zone: 9 hr 59 min 59 sec

Maximum time over which average heart rate can be calcu-

lated: 9 hr 59 min 59 sec

Update interval for average heart rate: 10 sec

Back-light duration: 4 sec per press of Light button

Battery: 3 volt Lithium 2025 cell

Battery life: approximately 1 year with 60 min/day heart

rate monitoring

Transmitter

Emitted frequency: 5 kHz ±10%

Battery: 3 volt Lithium 2032 cell

Battery life: 2 years when used 60 min/day

Range: 95 cm (37 inches) maximum to watch/receiver

Replacing Batteries

Transmitter

Unscrew the battery compartment counterclockwise, using a

coin (see Fig. 13). Before you remove the old battery, note

its orientation. Please be sure that the new battery is

inserted with the same orientation (with the positive pole

upwards and the negative pole against the battery compart-

ment spring). To maintain water resistance, make sure the

rubber O-ring is in place.

Watch Receiver

The battery in your HR400 is replaceable, however, we rec-

ommend that you take it to a jeweler or watch repair shop

for battery replacement to ensure that the water resistance

is maintained.

Troubleshooting

What if the heart rate reading is erratic or totally absent?

a. Check to see that the chest band is tight enough. The

band should be adjusted so that the electrodes are ﬂat

against your skin. You may have to move the band one way

or another to ﬁnd the best position for the transmitter.

b. Check to make sure that the electrode strips are thor-

oughly moistened with water or saliva. The transmitter will

not function properly without moisture to make good elec-

trical contact.

If you are wearing the transmitter over a shirt, make sure

there is enough moisture to make the needed contact with

the electrodes.

Accumulated sweat and dirt may interfere with clear recep-

tion of the signal from the skin to the transmitter. Check to

see if your transmitter needs cleaning.

c. Be sure you have made a long press of the Mode button

from the appropriate screen.

d. Check the battery in your transmitter.

Figure 13. Changing

the transmitter battery,

remember to replace

O-ring correctly.

HRM400 3/30/99 10:12 AM Page 22

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