Guardian MOB Beacon Watch 121.
WARNINGS Use the beacon function of the Guardian MOB Beacon Watch only in situations of grave and imminent danger. The beacon function can only be used in conjunction with a suitable 121.5MHz receiver. The beacon function is set at the factory to manual activation. For automatic activation, the beacon must be armed by the user. THIS FUNCTION WILL NOT WORK IN FRESH WATER. This product contains a lithium battery. Do not puncture, incinerate or recharge. Dispose of safely.
Contents WARNINGS ....................................................................................................................... 2 1. Introduction ................................................................................................................. 4 1.1 Man Overboard Operation ........................................................................................ 4 1.2 Battery Life ........................................................................................................
1. Introduction The Guardian MOB Beacon Watch is a full function alarm chronograph which incorporates an emergency distress transmitter. The transmitter may be activated automatically if the Watch is immersed in water; it may also be activated manually. This product is designed to be worn in conditions where the user is at risk of falling into water and where it may be difficult to locate the person in the water visually.
1.2 Battery Life The battery is designed to power this product for a period of 1 year. When the battery is running low the LED flashes and the sounder beeps four times, repeating every minute. This warning normally indicates that the battery has reached the minimum level at which performance can be guaranteed; any further deterioration may jeopardise the performance of the beacon in an emergency. Refer to Page 15 for information on testing the beacon to verify the alarm.
2.
2.1 Transmitter Control The transmitter can be set into one of two modes: Off Transmitting - Permanently transmitting on full power The activation system can be triggered by one of two methods: Manually Automatically, by immersion in water 2.2 ARMING & CONFIRM Button Control 2.2.1 Status Check To check the armed status of the beacon, press and hold the ARMING button only.
2.3.1 ARM (for automatic activation by immersion in water) To set the Watch in ARMED mode: Step 1: Press the CONFIRM button 3 times: A single beep and LED flash confirms this step. Step 2: Press the ARMING button once: The acknowledgement is a double beep and LED flash. Once armed the LED will flash once every minute or so to indicate that it is in ARM mode. 2.3.2 DISARM To DISARM the Watch: Step 1: Press the CONFIRM button 6 times: A single beep and LED flash confirm this step.
2.4 Transmit (Manually) To start transmitting manually, press and hold both the ARMING and CONFIRM buttons for 3 seconds. The acknowledgement is a single beep. The LED flashes during the period of transmission. To stop transmitting the Disable Transmittlng sequence must be performed. 2.5 Disable Transmitting To stop transmitting manually, press and hold both the ARMING and CONFIRM buttons for 6 seconds. The acknowledgement is a single beep and LED flash. 2.
3. Watch Time Functions The time functions use 4 external push buttons (Start, Reset, Mode and Light) for setting and adjustment. The following features are included: Hour, Minute, Seconds and Day of the Week Month and Date Chronograph 1/100 Second with Lap/Split Control Maximum chronograph count: 23 Hours 59 Minutes 59 Seconds Alarm Hourly Chime 12/24 Hour display at user’s option 3.
3.3 Setting Sequence 3.3.1 Normal Time Setting Press Mode 3 times to enter normal time setting mode. TU flag will flash. Seconds will start flashing, press Start to set seconds to zero. Press Reset once: Minutes flashing, press Start to advance. Press Reset once: Hour flashing, press Start to advance (A is AM, P is PM and H is 24 hour format). Press Reset once: Date flashing, press Start to advance. Press Reset once: Month flashing, press Start to advance.
3.4 Hourly Chime Chime is activated by pressing and holding Reset, then pressing Mode once; the SU through SA flags appear. Deactivate Chime by pressing and holding Reset then pressing Mode once; the SU through SA flags disappear. 3.5 Chronograph Press Mode once to enter Chronograph mode; the SU, FR, SA flags flash. Pressing the Start button starts and stops the time display; the time accumulates on successive starts. Reset sets the timer to 0:00:00.
4. Service 4.1 Battery change It is not recommended to attempt to replace the product battery, as this is a task for a skilled specialist. It is advisable to return the product to McMurdo, or to take it to a McMurdo Service Agent. A kit containing all necessary parts and instructions is available. The product must be fully tested after battery replacement.
5. Training Watch The Training Watch is identical to the Guardian MOB Beacon Watch in operation, except that it transmits on 121.65MHz. As a consequence its signal cannot be received on normal distress alarm receivers, thus training exercises may be conducted without creating false alarms. The training watch is clearly identified by its strap markings. NEVER WEAR THE TRAINING WATCH EXCEPT FOR TRAINING EXERCISES. The MOB Emergency Receiver has a special listening mode designed for use in training exercises.
6. Battery reset Under certain conditions, typically when the beacon has activated for short periods, the low battery alarm may sound although the battery does not need to be replaced. If this is suspected, the battery alarm function should be reset by: 1 Press and hold the CONFIRM button 2 Press the ARMING button once 3 Release buttons. The unit will acknowledge with 5 beeps. 4 Immediately press the CONFIRM button twice. The unit will acknowledge with a LED flash.
McMurdo Limited Product Warranty Subject to the provisions set out below McMurdo Limited warrants that this product will be free of defects in materials and workmanship for a period of 12 months from the date of purchase.
In order to be valid, claims must be made under the above warranty in writing as soon as practicable after discovery of the defect or failure and within the warranty period referred to. Following a valid warranty claim McMurdo Limited shall be entitled to repair or replace the product (or part) in question free of charge, or at McMurdo Limited’s sole discretion to refund to the buyer the price of the product (or a proportional part of the price).
Specification Chronograph watch - see text for functions Operational temperature range: 121.5MHz beacon Environmental Operational temperature range: Water Pressure Rated: Weight inc. strap: RF Transmitter Frequency: Class of Emission: RF Power: Frequency error: Duty cycle: Modulation type: Modulation duty cycle: See Page 14 for details of the Training Watch –10°C to +60°C –20°C to +55°C 50 metres or 5atm 81grams 121.5MHz A3X -25dBm +/- 3.5kHz 100% Sweep downward from 1.
McMurdo Ltd Silver Point Airport Service Road Portsmouth Hampshire United Kingdom PO3 5PB A member of Chemring Group PLC 88-151 Issue 2
