user`s manual
Contents
1. CAUTION This unit is not reverse battery protected except by use of the polarized connector Make sure your battery connector is wired to match the charger connector or damage to the battery and charger may result when power is applied While in a reversed condition the charger will indicate that it is in the charging mode However it will actually be discharging the battery at the rated charge current until either the battery or charger is damaged CAUTION This unit is not short circuit protected it will deliver the full rated current into a short If the short is not removed the charger may overheat and be damaged While in a shorted condition the charger will indicate that it is in the charging mode If the charging light is on while not connected to a battery then there is probably a short in the output cable or connector Remove the output cable to see if the charge light goes out If the light stays on without an output cable connected then there is a problem with the charger Plug the battery charger into a properly grounded 3 prong wall outlet which supplies the correct input power as marked on the unit The indicators should be dark until a battery is attached Attach the output connector to the battery connector The charger should now be on and charging the battery The orange CHARGING light should be on If the green READY light is on instead then the battery voltage is probably too high2. too many cells The battery must be a 1 2 to 14 4 volts 1 to 12 cells battery The orange CHARGING light indicates that the charger is on and in the charging mode The charger will deliver a constant current rated output current to the battery for 13 to 15 hours After this time the unit will switch into the float charge mode the orange CHARGING light will darken and the green READY light will come on At this point the battery is fully charged When the charger is in the float charge mode a constant current 1 4 that of the rated output current is delivered to the battery to keep it fully charged Most nickel cadmium batteries may be left connected to the charger in the READY float mode indefinitely without a danger of overcharging However we recommend you refer to the battery manufacturers documentation for the suitability of float charging your battery CHARGING NOTES AND TIPS The batteries should be fully discharged before being put onto charge This has two benefits the batteries will not be overcharged and they will be less likely to develop a memory effect The safe charging curve graph on the next page represents what size batteries can be charged without damaging the charger for each battery capacity or charge current The charger is designed to charge batteries at the C 10 charge rate capacity 10 If your battery capacity is 2 8 AHr 2800 mAHr then the charger should be rated for 280 mA 2800 10 Refer to your b
3. the charger or immerse unit in water BATTERY CHARGER SPECIFICATIONS Operating temperature 0 to 40EC 32 to 104EF Storage temperature 40 to 80EC 40 to 176EF Dimensions H 3 8 9 65 cm x W 2 8 7 1 cm x D 2 8 7 1 cm Weight Less than 1 5 Ibs 0 68 kg with standard output cable Power Requirements 120 V 60 Hz 2 A RMS OUTPUT RATINGS 20EC Unit MHTX 7 Charge Amps C 10 or 0 1C where C Battery Capacity 50 to 500 mA refer to marking label on unit Float Amps C 40 or 0 025C where C Battery Capacity Approximately 1 4 of rated output current Charge Voltage Floats with respect to Battery Voltage Reset Voltage Approximately 21 volts will switch into float mode Open Circuit Voltage Approximately 25 volts Charge Timer 14 hours 1 hr Battery Rechargeable Nickel Metal Hydride 1 2 to 14 4 Volts 1 to 12 cells 500 mAHr to 5 AHr Refer any questions to XENOTRONIX Inc Monday Friday 8 30am to 4 30pm ET tel 407 331 4793 fax 407 331 4708 XENOTRONIX Inc 8 00 Document MN2 MHTX7
4. AW Geto D4 innovations in battery charging Battery Charger for Nickel Metal Hydride Type Rechargeable Batteries Model MHTX 7 Series Operating Instructions OREADY OCHARGING CAUTION use mpoons ontv WARNING CHARGE ONLY RECHARGEABLE BATTERIES OTHER TYPES MAY EXPLODE ADVERTISEMENT UTILISER UNIQUEMENT DES PILES RECHARGEABLES LES PILES ORDINARES RISQUENT D EXPLOSER Model MHTX 7 Class 2 Nickel Metal Hydride Battery Charger a _XENOTRONIX A AX WARNING CONCERNING THE REMOVAL OF COVER CAUTION TO PREVENT THE RISK OF CAUTION TO PREVENT FIRE OR SHOCK ELECTRIC SHOCK DO NOT REMOVE HAZARD DO NOT EXPOSE UNIT TO RAIN COVER NO USER SERVICEABLE PARTS OR MOISTURE INSIDE REFER SERVICE TO QUALIFIED SERVICE PERSONNEL IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important safety and operating instructions for Model MHTX 7 Battery Chargers Before using the battery charger please read all instructions and cautionary markings on the battery charger the battery and the product using the battery CAUTION To reduce the risk of electric shock C Do not expose unit to rain or moisture C Do not remove cover There are no user serviceable parts inside Refer service to qualified service personnel C Connect the battery charger directly to a grounding receptacle An adaptor should not be used with this unit This unit is equipped with a power plug having an equipment gro
5. attery documentation to see if the charger will charge your battery properly Example If your charger is rated for 400 mA then it will recharge 4 AHr batteries between 4 8 to 13 2 volts 4 to 11 cells It will safely charge a 14 4 volt 12 cells battery as long as the charger receives a full 115 volts ac input If the input voltage is below 115 volts at that charge voltage the maximum current will begin to drop and the battery may not be fully charged Attempting to charge 4 AHr batteries between 1 2 to 3 6 volts 1 to 3 cells will cause the charger to overheat and possibly be damaged the batteries will not be damaged Smaller capacity batteries will be overcharged and larger capacity batteries will be undercharged SAFE CHARGING CURVE an F SAFE TO CHARGE BATTERY CELLS CAUTION TRYING TO CHARGE A BATTERY UNDER THE CHARGING CURVE WILL CAUSE THE CHARGER TO OVERHEAT 0 5 1 1 5 2 2 5 3 3 5 4 4 5 5 BATTERY CAPACITY AHr XENOTRONIX can custom make units or modify our existing units to exactly match your charging needs Call our sales department for technical information and pricing Following are some of the modifications we can perform Custom match the charge current to your battery capacity C Adjust the charge times for a faster or slower recharge C Provide custom cables and connectors C Private labeling TROUBLESHOOTING NO INDICATOR LIGHTS If the indicator ligh
6. is a two stage constant current battery charger for charging nickel metal hydride type rechargeable batteries The charge termination is by timer 13 to 15 hours standard at which time it will switch from the charge current into a float charge mode at a reduced current An output cable 6 feet long with a barrel plug is provided There are two indicators on the front panel The orange light indicates that the charger is in the charging mode The green light indicates that the battery is fully charged ASSEMBLY INSTRUCTIONS Loosen the screws on the charger output terminal strip Identify the polarity of the terminal strip ant the output connector both the charger housing and the output cable are marked with amp symbols Attach the two spade terminals to the terminal strip and tighten the screws To prevent accidental shorting cover the exposed terminals with the molded press on terminal cover OPERATING INSTRUCTIONS Before using this battery charger make sure it is compatible with your battery _ Refer to the ratings on the battery charger the specifications in this manual and a batteries Attempting to charge other types of batteries may result in battery L damage This unit is provided with a polarized barrel plug connector Make sure your battery connector is wired to match the output connector your battery documentation Charge only nickel cadmium type rechargeable 1
7. ts are both dark when power is applied and the charger is properly attached to a battery check to see if the receptacle is controlled by a light switch or power strip switch CHARGER STARTS UP IN READY MODE If the charger READY light comes on when you first attach the battery or in less than 13 hours then the battery is probably more than 14 4 volts 12 cells The charger resets into float mode when it detects a voltage over 21 volts It will reach this voltage charging batteries over 15 6 volts 13 cells CHARGER WILL NOT SWITCH INTO FLOAT MODE If the charger will not switch into the float mode after 15 hours check to see if there was a power interruption A power outage or glitch may have reset the charger timer for another 13 to 15 hour charge cycle CHARGE LIGHT ON WITHOUT A BATTERY This indicates that the output cable or connector is shorted If the light goes out with the output cable removed then you should replace the cable Do not attempt to charge a battery with a shorted output cable RATTLE If you think you hear a rattle inside the charger it is probably only a loose terminal strip screw Once the output cable is attached the rattle should go away MAINTENANCE INSTRUCTIONS CLEANING Unplug the charger before attempting any cleaning If it becomes necessary to clean the enclosure wipe the exterior of the enclosure with a damp cloth and a mild detergent Do not use an abrasive cleanser Do not spray cleaners directly onto
8. unding conductor 3 prong The unit must be plugged into an outlet that has been properly installed and grounded in accordance with all local and national codes and ordinances C Disconnect charger from AC power before attempting any maintenance or cleaning Turning off controls may not reduce this risk WARNING C Charge only nickel metal hydride type rechargeable batteries Attempting to charge other types of batteries may result in personal injury and battery damage C The enclosure metal face may become hot during the charge cycle DO NOT TOUCH DANGER Never alter power plug blades or ground pin If it will not fit the outlet have a proper outlet installed by a qualified electrician Improper connection will result in the risk of an electric shock or fire Make sure cords are located so that they will not be stepped on tripped over or otherwise subjected to damage or stress Do not operate this unit with a damaged cord or plug replace them immediately To reduce the risk of damage to electric plug pull by unit body rather than output cord when disconnecting unit Do not operate charger if it has received a sharp blow been dropped or otherwise damaged in any way Do not disassemble charger incorrect reassembly will result in the risk of an electric shock or fire Refer service to qualified service personnel Allow space around unit and adequate air circulation to reduce internal heat buildup GENERAL DESCRIPTION This unit
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