Alarm going off at 12AM every day

It appears to be a built in 'feature'.

• Newly designed with a capacity range from 0.05 oz to 12 lbs (1 gram to 5.4 kg), the Pro II features a built-in countdown kitchen timer with 3 alarm modes (audible beep, blinking LED, or combined).

The new countdown kitchen timer offers an audible beep, blinking LED, or combined audible and visual alarm for the fast-paced chef. The scale's weighing platform is made of durable glass, and the large screen features a new bright LCD with an improved viewing angle.
The Ozeri Pro II Digital Kitchen Scale also features a 3 minute automatic turn-off that yields enough time to make adjustments to measurements before it automatically turns off to conserve battery life. Ships with 2 AAA batteries included, both a calorie and postage guide, and a user manual. Your satisfaction is guaranteed.

RTM! every product will be different

Open following link to identify timer
http://waterheatertimer.org/Woods-timers-and-manuals.html#59377

59377 manual
http://waterheatertimer.org/pdf/Woods-59377.pdf

Auto: timer must be set in AUTO for programming to work
The word AUTO is printed on timer face.
Small black triangle will display above the word AUTO when timer is in AUTO

Countdown is feature that lets you set timer ON for set amount of time, and when time expires, timer turns OFF.

Manual button.
I have not tested this specific timer.
Simply plug lamp into timer, and then push manual button to explore feature.
Watch what symbols display, and watch what lamp does.

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You posted under UPM programmable timers
Open following link to identify product and download manual
http://waterheatertimer.org/UPM-timers-and-manuals.html

Q1) Some UPM timers, and other brands, offer countdown feature in addition to regular programming.
So you choose between regular programming and countdown.
Countdown is for a bathroom fan for example.
Push the button and fan turns on for set amount of time.
After countdown is over, fan turns off automatically.

Q2) Yes all days of the week can be selected.
Set event 1 ON for all days.
Set event 1 OFF for all days.
Do not set more events unless you want more on-off events.

Q3) Switch position depends on model number.
Add a comment with model number to identify product and I will look at manual alongside you.
Or try the switch in different positions.

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Review at Amazon seems to say the timer can repeat the same countdown each time button is pushed and countdown is activated.

Amazon review says:
http://www.amazon.com/General-Tools-TI150-Visually-Impaired/product-reviews/B001TOJG7Y/ref=dp_db_cm_cr_acr_txt?ie=UTF8&showViewpoints=1
The timer is easy to set. You just set the time, then hit the big "start/stop" button and the little "H" and "M" on either side of the timer display flashes.

To clear the timer, just hit both the "h" and the "m" buttons simultaneously. (so time has to be cleared)
To stop the alarm or to turn off the timer before the alarm sounds just hit the "start/stop" button.

On the back of the timer, there are 4 different on/off switches: flashing light alarm, sound alarm, vibrating alarm, and one for hours/minutes or minutes/seconds.

When I set the timer on my desk, it moved around when the alarm went off but when I turned off the vibrating function, the timer didn't move around.

If you need to turn off both the sound and vibrating alarms and use only the flashing light alarm, the light is quite noticeable by itself if placed nearby in your line of sight (within a foot or so). This would be very handy if you're near a sleeping baby! :) But if you clip it on a breast pocket, I would use both the flashing light and vibrating alarms. The vibrating alarm does make a sound, but it's not as loud as the ringing alarm.

You posted under UPM 350 programmable timer
http://waterheatertimer.org/UPM-timers-and-manuals.html

Manuals for all UPM timers are missing key explanations, despite the lengthy manual.
I think there are 3 things to look for:
1) Program1 is ON and program2 is OFF and program3 is ON etc.
2) When setting days, be sure that ON and OFF are set for same days so there are no conflicting programs.
3) Timer gives three modes: Countdown and Random and Programming. Countdown is for a bath fan when you want to turn on fan with push of button and have timer turn off fan automatically after the countdown expires. Do not use countdown or random functions when you want timer to perform ordinary on-off functions.

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A) GE 15069 image at Amazon
http://www.amazon.com/60-minute-Automatic-Shut-Off-Timer-Switch/dp/B002DNAE7Q

15069 manual
http://www.jascoproducts.com/support/manual-downloads/applications/DocumentLibraryManager/upload/In-Wall-15069-Manual-eng.pdf

Manual shows GE 15069 countdown timer is rated up to 1/2 horsepower
Whole house fan is likely 3/4 horsepower >> check nameplate on fan motor.

B) work around:
Hook timer up to a contactor/relay.
Timer turns on 120 volt, 7 watt contactor coil.
Contactor turns on fan motor
http://waterheatertimer.org/H230A.html
Square D contactor at Grainger
http://www.grainger.com/Grainger/SQUARE-D-Compact-Contactor-5B132?Pid=search
http://www.pexsupply.com/Furnas-Controls-45EG20AF-2-Pole-30-Amp-120V-Contactor
I buy these contactors at local HVAC supply for $15
add a comment if you need help wiring this device.

C) List below shows countdown timers with horsepower rating:
GE15088 countdown timer is rated 3/4 hp
http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay

Intermatic spring wound countdown timers are rated for 2 horsepower
http://www.intermatic.com/products/timers/in-wall%20timers/decorator%20spring%20wound%20timers.aspx

Woods spring-wound countdown timer says bath/ ceiling fans, but doesn't give horsepower
http://waterheatertimer.org/pdf/Wood-59700-series--spring-wound.pdf
http://waterheatertimer.org/Woods-timers-and-manuals.html#countdown

Woods push-button countdown is 1/4 horsepower
http://www.amazon.com/Woods-59014-Decora-12-8-4-2-12-Hour/dp/B002C54GH4

Lutron MA-T51 countdown timer specifically says it cannot be used for motors, which says the electronics inside each device is Load specific
http://www.amazon.com/Lutron-MA-T51-WH-Maestro-Countdown-Timer/dp/B001EFV1DA
http://www.lutron.com/TechnicalDocumentLibrary/0301041A.pdf

Pass and Seymour RT1 countdown does not show rating for horsepower, so this timer will probably not work for fan motor
http://www.homedepot.com/Electrical/h_d1/N-5yc1vZ1xg8Zarcd/

Wattstopper RT50 at Grainger shows 1/6 horsepower rating
http://www.grainger.com/Grainger/WATT-STOPPER-Time-Switch-2HTE1?Pid=search

Setting the clock: press and hold the "F" button until the remote beeps twice and the hour flashes. Press the option button to go down and press the key/trunk button to go up. Once at the desired hour, press and release the "F" button to go to the minutes. Again press the option and/or the key/trunk button to set the minutes. Press and release the option button to cycle throught the other features (alarm, alarm tones, remote start countdown timer, parking meter countdown and shutdown tones). You will see "OFF" after you cycle through the alarm timer and remote start countdown timer.Press the key/trunk button to turn the feature on and/or, press the option button to turn the feature off. After you have set the time, do not press any button for approximately eight(8) seconds and the remote will exit the programming sequence and save the time.

The crown has 3 positions.

Normal screwed down.
First pull out position.
Second pull out position.

Setting the Time:
Pull out the crown to position 3.
Rotate the crown to set the exact time.
Ensure that you are in the daytime12 hour segment by allowing the hands to pass 12 o'clock and notice if the date moved on or not.
If the date changed, then you will need to advance at least 2 hours before moving on to set the date.
If you do not need to change the date, return the crown to position 1.


Setting the Date:
DO NOT DO THIS IF THE WATCH IS BETWEEN 8pm & 2am
Pull crown to position 2.
Rotate the crown clockwise to set to the correct date.
Return the crown to position 1.


Setting the Alarm [12 hour]
Pull the crown to position 2.
Rotate the crown anti clockwise to move the alarm hand to the desired time.
Return the crown to position 1.
To activate the alarm, press the 8 o'clock button. You will hear 2 beeps.
To deactivate the alarm, press the 8 o'clock button. You will hear 1 beep.
NB If the alarm is not cancelled while it sounds the first time, it will repeat again in 2 minutes time. The alarm sound last for 15 seconds. If the alarm time coincides with 1 beep of the countdown, the alarm function will be cancelled.


Battery EOL [End Of Life]
The Swiss ISA 8270 movement uses a 395 cell and will signify a low power state by advancing the small seconds hand 4 steps every 4 seconds.


Setting the Countdown
You can specify a countdown of between 1 and 10 minutes.
Press the 4 o'clock button to enter setting mode. You will hear 1 beep.
Press the 4 o'clock button to move the central timing hand successively to the desired countdown time.
Wait 3 seconds for the watch to automatically exit the setting mode.
You can change the duration of the countdown [except in the last minute] at any time.
e.g. If the countdown is set to 10minutes, and you now want to change the countdown to 9 minutes, press the 4 o'clock button. The hours/seconds counter sub-dial will perform one complete turn and then stop at 60, before continuing.


Activating the Countdown:
Press the 2 o'clock button to start the countdown. You will hear 2 beeps.
The hours/seconds counter sub-dial will perform one complete turn and then stop at 60, before continuing.
When the countdown begins, the hour/seconds counter sub-dial indicates the seconds with 1 step every 2 seconds, and the central timing hand indicates the minutes with 1 step being 2.4 seconds.


Countdown tone:
There are 2 beeps every minute.
in the last minute:
50 seconds=1 beep.
40 seconds=1 beep.
30 seconds=2 beeps.
20 seconds=2 beeps.
10 seconds and less=1 beep every second with zero being 1 second long beep. Timer function automatically starts.


Timer:
After countdown has finished the timer starts automatically.
The central timing hand indicates the minutes with 1 step every 12 seconds. The hour/minutes counter sub-dial indicates the hours up to a maximum of 96.
Press the 4 o'clock button to see the timer seconds [display lasts up to a minute].
Press the 4 o'clock button to see the timer hours.
The timer has a maximum time of 96 hours [4 days] after which the hour/seconds sub-dial counter will stay at 0 and the central timing hand will stay at 12.


Start/Stop Timer:
Press the 2 o'clock button to stop the timer. You will hear 1 beep.
Press the 2 o'clock button to resume the timer. You will hear 2 beeps.


Setting the Countdown & Timer:
Countdown reset:
Press the 2 o'clock button to stop the countdown. You will hear 1 beep.
Press the 4 o'clock button to reset.


Setting the Timer:
Press the 2 o'clock button to stop the timer. The hour/seconds counter sub-dial will show the elapsed hours and the central timing hand the elapsed minutes.
Press the 4 o'clock button to view the seconds elapsed on the hour/seconds counter sub-dial.
Press the 4 o'clock button to reset.


Resetting the Hands:
If the hands do not zero correctly, which might occur after a battery change or a violent shock, you can make adjustments by doing the following settings as long as the countdown is not in operation.
To correct the hour/seconds counter sub-dial, pull the crown out to position 2 and wait 1 second.
Press either the 2 or 4 o'clock button; the central timing hand will turn and stop [not necessarily at 12].
Press the 2 o'clock button to increment the hours/seconds counter sub-dial hand to position it at 60.
To correct the central timing hand, press the 4 o'clock button to increment the hand to the 12 position.
Return the crown to position 1.



If the battery had been replaced, the central timing hand defaults to the 10 minute position. If the battery had not been replaced, the central timing hand will return to the previously set position.

Try "playing" with the CountdownTimer feature: Setting the CountdownTimer 1. Press TIMER ON/OFF to enter timer setting mode. The red TIMER icon will flash on the display. 2. To select countdown time, use the TRK (SEARCH?TUNE) / buttons to select the correct time. Press and hold to fast forward or fast reverse countdown time. 3. Press TIMER ON/OFF again to activate the timer. The unit will beep twice to indicate countdown has started. The red TIMER icon will remain lit during countdown. 4. Press TIMER ON/OFF to turn timer off at any time or after it has sounded. good luck