Microtek ups,no backup,pc restarts on voltage fluctuation
I've a microtek 800 VA double battery (each having 7.2AH) ups. suddenly before 4 days a low battery like alarm came and my speaker (intex) burnt out.After that ups is not providing any backup (before problem it was providing around 50 minutes backup) and also pc restarts with a little voltage fluctuation with a sound from ups.ups is 1.5 year old.please help me.
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Actually most anything can cause them to do that. The helps that reduce those are a great Internet security, like Kaperski, a backup battery power supply, One of the main causes is low voltages. Your cpu cooling fan might be not functioning correctly or the system might be physically dirty or you might not be allowing air to get to the system, because of placement. There are many more reasons, so research the info I have sent you, maybe it will help.
We all use many devices and equipments that run on electricity. For all these to function properly they need uniform power supply (constant flow of electricity). As the electric supply in many countries is not uniform there is a need for a device to correct it. There are many such devices available in the market today. For example UPS (Uninterrupted power supply), Voltage Stabilizer, Constant Voltage Transformer are such devices available today.<br />
<b><u>Why buy a UPS?</u></b><br />We can never guarantee that we will get constant power. The power supply always has fluctuations. Surges, Spikes, Brownouts, Blackouts and Noise can damage your electrical appliances especially your computer. To prevent this from happening you need a device that does power conditioning. Electricity has to be uninterrupted. If the voltage is higher than the specified level then it is 'Over Voltage'. If the voltage is lower than the specified level then it is 'Under Voltage'. Both Spike and Surge come under 'Over Voltage' category. But there is a small difference between spike and surge. If there is very high voltage for an instant but comes back to normal immediately then it is called 'Spike'. If there is very high voltage for a slightly longer period then it is called 'Surge'. If the voltage is dangerously reduced to very low within a short period of time then it is called 'Brownout'. When this happens, the computer can be seriously damaged. If the power supply is totally cut then it is called 'Blackout'. Noise can mix with electromagnetic or radio waves or any signals. This is called 'Line Noise'. This may also reduce the voltage level to very low within a short period of time.<br />
<b><u>How can the UPS provide power when the main electrical supply is cut?<br /></u></b>A UPS has an internal battery. With this battery charger, an Inverter is also present. The inverter converts the 'Direct current' supplied by the battery to 'Alternatinc current' as required by the computer. When there is electrical supply the charger in the UPS charges the internal battery. When there is a power cut, the battery kicks in to supply the DC which is converted to AC by the inverter and power is supplied to computer.<br />
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<b><u>What if the battery loses its power?</u></b><br />When there is power cut, the required power is taken from the battery. Therefore the battery keeps losing its capacity. If the power supply comes back before the battery is depleted then the battery charger will start recharging, but if the power supply doesn't come back then the battery keeps supplying until it totally drains out. When the battery drains below a certain level the UPS sounds an alarm for your to shut down your computer and turn off the UPS. Some UPS' even have a built in system that shuts your computer down for you after a certain amount of UPS uptime.<br />
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<b><u>How long can the UPS provide power when there is a blackout?</u></b><br />This all depends on the specifications of the UPS and the requirement of the computer. A 600vA UPS for example can supply power to a computer with a 550W power supply for about 10 minutes or more.<br />
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<b><u>Tips for buying an UPS</u></b><br />The backup time of your UPS is the most important you need to consider. Other than that, you should know how many KVA (Kilo Volt Ampere) your UPS has. A computer needs atleast 0.5 KVA (500VA) to function. If you are planning to connect more than one computer to a single UPS then you need to get one with a higher KVA.<br />
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<b><u>What type of battery does a UPS use?</u></b><br />UPS uses <b>SMF</b> batteries (Sealed Maintenance Free). These type of batteries can be used for 5 to 7 years continuously.
As far as I know desktops do not have batteries unless you have an external UPS power backup system. If you are getting low voltage alarms or unexpected system shutdowns your power supply needs to be replaced. If you are using a laptop and you are plugged into an outlet and your battery is in this can cause the battery to go bad. E.I. if you use an outlet take out your battery.
I hope this helps.
Check the batteries voltage and check to see if the battery is being supplied charge voltage when the computer is off. If both these are good then your low battery message is in error. No charge voltage would mean faulty charger and low battery voltage would mean faulty battery.
If it is only a very short fluctuation, your system should not shut down if the UPS is working properly. Some things to check... 1. Make sure you have your computer components plugged into the outlets marked "Battery Backup" not on the outlets marked "Surge Protection". (The words may be slightly different on different models) Only things plugged into the "Battery Backup" outlets will keep running when the power fluctuates. The other outlets do not get any battery backup. 2. If the unit has been drained by a lot of power drops recently, it may not have enough power stored up to keep your whole system running the next time the power drops, even briefly. Especially if it is an older unit, as the battery itself does wear out over time. 3. As for the "modem" clicking on and off... are you sure it's the modem clicking? Most UPS's make a noticeable sound when they kick into battery mode and back again. It can sound like a modem click. Just an idea.
1. Bad temp sensor
2. Bad voltage, but that will usually cause the whole system to restart
3. Too low maximum temp setting inside the chassis(setting is in bios), often denote as max case temp.
One way to bypass the problem is rig the fan to a molex adapter with a variable voltage molex to 2/3/4pin fan connector and adjust the speed to the maximum quiet setting.
The 831's did run a bit warm so if the case temp setting is set to low it will fluxuate quite a bit. Try adjusting the max case temp up around 50c just to see if that does it, if it does either use the variable voltage dial solution or add a second case fan that's always on, prefferably a low RPM running direct off molex so it will reduce the average temp and therby the need of the monitored case fan to rev up.
Hi. It can be related to the backup battery, but I wouldn't have thought this model was old enough to need a new battery yet. Also, if you do not turn the mains power off (or turn the key to off at the register), and it still loses your programming, then it is not the battery since the battery is only needed to support the programming while the machine is turned off at the wall or at the key. If you want to be sure, then program it, leave it turned off at the wall overnight and try again in the morning. If it loses everything from being switched off, then you need to check the battery. It is internal, so you would need to take the top section off if you want to check it with a meter.
The other problem I've had is tiny cracks in the soldering on the main board inside. Usually the machine will blink on and off when closing the drawer sometimes if this is the problem.
On some models (if they have the two vertical note holders in the drawer), the wiring in the back of the drawer can get pinched by the tray when it clicks in to the latch. Check that the wires have not started to get squashed against the drawer latch mechanism.