PC 4 - Sports Watch SIGMA - Free user manual and instructions
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USER MANUAL PC 4 SIGMA
Asia, Australia, South America 2014, 01, 03, 07, 10, 15
TAIZHANG City, Taiwan
Tel. +8886-4-24753
Fax++886-4-24753563
WWW.SIGMASPORT.COM
EnglishContents1 Introduction and packaging contents

1. Your new PC 4
1.1 Introduction and packaging contents 15
1.2 Overview: Watch, symbols and display layout 16
1.3 Setting the time 17
2 Training
2.1 Attaching the chest belt, fastening the bicycle mounting bracket 18
2.2 Display of heart rate frequency 19
2.3 Training time (start, stop, reset) 20
2.4 Ending the training 21
3 Information
3.1 Useful facts about heart rate frequency 22
3.2 Important information 23
3.3 Frequently asked questions and service 24
3.4 Warranty
25
Information
Thank you for purchasing the SIGMA SPORT PC 4 heart rate monitor. Your new PC 4 will provide you with reliable service in sport and leisure for many years to come.
The PC 4 is a state-of-the-art measuring instrument. Please read the instructions carefully to become familiar with the functions of this heart rate monitor.
SIGMA SPORT wishes you an enjoyable time using your PC 4.
Heart Rate Monitor PC 4

Elastic strap

Transmitter belt

Bicycle mounting bracket with o-ring

1.2 Overview: Watch, symbols and display layout 1.3 Setting the time

Time
Function key
Symbol for heart rate frequency received
Current heart rate
130° 0:1545
Stopwatch [training time]
Symbol for running stop watch

Time
Stopwatch: Previous training time
10:45 03548
WWW.SIGMASPORT.COM
The clock can only be set when the PC 4 is in sleep mode. (Only time is displayed)
Note: Do not pause too long when changing the settings! The PC 4 automatically changes to the next item to be set after 3-4 seconds.
Press the function button down for 4 seconds, [You will first see the word "hold", followed by the flashing time format - 24 hour or 12 hour display], then release.
Chose between 24 and 12 hour format using the function button.
Please wait - Display will automatically change to the next setting.
Set the current time in hours by repeatedly pressing the function button.
Please wait - display will change to the next setting.
Set the first digit of the minute setting by repeatedly pressing the function button.
Please wait - display will change to the next setting.
Set the second digit of the minute setting by repeatedly pressing the function button.
Please wait - The time is now set.

2.1 Attaching the chest strap/handlebar holder 2.2 Heart frequency display

Attach transmitter belt to the elastic strap.

The length of the strap can be individually adjusted via the securing mechanism. Take care to set the strap length so that the strap fits well but not too tightly.

Put the belt on so that the transmitter is below the base of the pectoral muscle in men, and below the base of the breast in women.

The SIGMA SPORT logo must always face forwards and be readable.

In the front, raise the belt slightly from the skin. Moisten ribbed zones [electrodes] on the back of the transmitter with water.

Fastening the bicycle mounting bracket.
The PC 4 is in sleep mode.
The chest belt is attached.
Press the function button to activate training mode.
The current heart rate frequency appears in the display.
10:45
10:45
130 00000
2.3 Training time [start, stop, reset] 2.4 Ending the training
![SIGMA PC 4 - Training time [start, stop, reset] 2.4 Ending the training - 1](/content/2026/02/384482/images/e57644942bda2e3285ae5c746fc60dea9c5aff89eeaec5b4f5f80ea7698b9afd.jpg)
3.1 Useful facts about heart frequency 3.1 Useful facts about heart frequency
The heart rate frequency (HR) or pulse is recorded in beats per minute.
Maximum Heart Rate Frequency
The maximum heart rate (max HR) is the highest frequency possible, achieved at total exhaustion during physical performance. Some factors that can influence max HR are age, weight, sex, and fitness level. The best way to determine your max HR is a stress test.
We recommend that you have your doctor carry out this test for you at regular intervals.
The max. HR can also be estimated with the aid of a mathematical formula:
Men:
210 - "half age" - [0.11 x personal weight in kg] + 4
Women:
210 - "half age" - [0.11 x personal weight in kg]
[Note: To convert weight from lb. to kg, multiply by 2.2]
The correct training pulse
The training zone is the range in which the heart rate frequency should fluctuate during effective and targeted training. Three training zones can be classified from a sports medicine perspective:
Please be aware that these are general guidelines. Target zones will vary from person to person. Individualized training/personal goal setting is only possible through a well qualified trainer who knows the individual.
HZ (Health-Zone)
Health 55 - 70% of the HR max. Orientation: General wellness and weight reduction. This zone is commonly referred to the "fat burning zone. At this intensity, the body readily burns fat and carbohydrates for energy.
FZ (Fitness-Zone)
Fitness 70 - 80% of the HR max. Orientation: Advanced fitness, aerobic conditioning. Your training is considerably more intensive in the Fitness-Zone. Energy is primarily generated from the combustion of carbohydrates.
PZ (Power-Zone)
Performance 80 - 100% of HR max. Orientation: Competitive training. The training in the Power-Zone is very intensive and should only be performed by trained individuals.
3.2 Important information
If no heart rate frequency can be read on the display, this may be the result of the following:
The chest strap/transmitter is not worn properly
- The inside surfaces of the conductive ribbed rubber pads are not clean or not moist.
- Disturbance from electrical interference sources (high-voltage cables, railway lines etc)
- Transmitter battery (CR 2032) is empty (ref. no. 00342).
- In some cases, use of a conductive gel may be necessary.
Please consult your doctor before starting training - especially if you suffer from any cardiovascular illnesses.
3.3 Frequently asked questions and service 3.3 Frequently asked questions and service
What happens if I remove the chest belt during training?
The watch will no longer receive any signal, and "0" will appear on the display.
Does the SIGMA SPORT heart rate monitor completely switch off?
No. Only the time is displayed in sleep mode, so that you can also use the heart rate monitor as a normal wristwatch. The PC 4 uses very little power in this state.
Can I use the chest belt on a treadmill?
Yes - the signals can be received and displayed by almost all corresponding cardio devices.
Are SIGMA SPORT heart rate monitors waterproof and can they be used for swimming?
Yes - up to a water depth of 3 meters.
Please note: Do not press the buttons underwater, as otherwise water can enter the housing.
Avoid using in sea water, as malfunctions can occur.
The display responds sluggishly or shows a black coloration, what is the reason for this?
The operating temperature may have been exceeded or fallen below. Your heart rate monitor is designed for a temperature of 1^ to 55^ .
What should I do if the display is faint?
A faint display may be the result of a weak battery.
The latter should be replaced as soon as possible - Battery type CR 2032 (ref. no. 00342)
Battery change.
A CR 2032 battery (ref. no. 00342) is used in the heart rate monitor und chest belt. The SIGMA SPORT heart rate monitor is a state-of-the-art measuring instrument. To ensure proper functioning and water tightness, the batteries should only be changed by an authorised dealer. Incorrect battery changes can damage the heart rate monitor leading to expiry of the claim to warranty.
After a battery change, the time has to be set again.
3.4 Warranty
We are liable for damages in accordance with the statutory regulations in respect to our contractual partners. Batteries are excluded from the warranty. In the event of a warranty claim, please contact the dealer from whom you purchased your heart rate monitor, or send the heart rate monitor together with receipt of purchase and all accessory parts, having paid sufficient postage, to:
SIGMA Elektro GmbH
For warranty in the US, Canada and Mexico: SIGMA SPORT USA
1926 Miller Drive, Olney, IL 62450
Service#:888-744-6277
Email: sales@sigmasport.us
In the event that you are entitled to a warranty claim you will receive a replacement unit. A claim only exists for the model current at this time. The manufacturer reserves the right to make technical changes.


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