PASCO ME-1234 User Manual

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Instruction Sheet

012-10091A

Stopwatch

ME-1234

Battery Cover

Screw

Negative (-)

Positive (+)

Battery

Introduction

The PASCO model ME-1234 is a digital stopwatch designed
specifically for science timing, and it can record and recall up to
nine event times. It has two display modes (‘Decimal Seconds’
and ‘MM:SS.SS’) and operates on a single ‘AA’ alkaline battery
(included). It also has a ‘Low Battery’ indicator.

Specifications

Timing Accuracy: 0.01 percent of reading or 0.005 seconds, whichever is

larger, +/- 1 digit.

Display Resolution: 0.01 seconds up to 59 minutes, 59.99 seconds and 1

second up to 99 hours, 59 minutes, 59 seconds.
Display Area: 47 mm by 20 mm.
Power Requirement: One ‘AA’ alkaline battery.
Auto-off Feature: Stopwatch powers down after 1 hour if idle, or if

maximum display time is reached (either 99:59:59 or 359999s).
Battery Life: One to two years of average use.
Environmental: 10 to 50 degrees C; splash resistant.

Installing the Battery

To install the battery, use a Phillips head screwdriver (#0 size) to
remove the screw located near the bottom of the back side of the
stopwatch. Lift the battery cover off the battery compartment.
Install the “AA” alkaline battery so the negative (−) end presses
against the spring at one end of the compartment and the positive
(+) end is firmly held at the other end of the compartment. Place
the battery cover over the battery compartment and tighten the
screw in place (see the diagram).

Button Functions

Press ‘ON’ to turn on the stopwatch. The stopwatch turns itself
off automatically if it’s idle for one hour, or if the maximum dis­play time is reached.

Button Function

START Clears display to ‘0.00’ and starts timing.

STOP Stops timing and displays recorded time.

RESET Stops timing and resets time to 0.00

seconds.

RESET:

1

(Hold

EVENT While timing, stores event times.

EVENT:

1

(Hold

RECALL Recalls LAST TIME, or recalls events if

1

Hold means to press-and-hold the button down for at least one

second.

2

This function is active in all modes except while timing.

Stops timing and clears time, last time, and
any stored event times.

)

Switches display between ‘Decimal

)

Seconds’ mode and ‘MM:SS.SS’ mode2.

any events are stored. While viewing event
times, scrolls through all stored events.

800-772-8700 www.pasco.com

Model No. ME-1234 Display Modes

Display Modes

When the stopwatch is turned on, the default display mode is
‘Decimal Seconds’. The other display mode (‘MM:SS.SS’)
shows minutes, seconds, and hundredths of seconds up to 59
minutes, 59.99 seconds (59:59.99), and then shows hours, min­utes and seconds up to 99 hours, 59 minutes, and 59 seconds
(99:59:59). Press-and-hold the EVENT button for slightly longer
than one second to switch between display modes.

Display modes: Decimal Second (default) and MM:SS.SS

Timing Events

Timing Simple Intervals With the display showing 0.00

second, press START to start timing. Press STOP to stop timing
and show the time. Press START again to begin timing a new
interval. (Note: The display will clear to 0.00 and start showing
the new time.)

Press-and-hold RESET to zero the time display and clear all the
recorded event times.

Resetting Events and Last Time Press-and-hold the

RESET button for at least one second to reset the time, all the
events, and the last time. You can press and hold RESET at any
time, even when the stopwatch is timing.

Other

Auto-Off The stopwatch powers down if it is left idle for an

hour. Press ‘ON’ to turn it on again. Although the display will
show ‘0.00’, if there are stored event times, ‘

EVENT’ also appears.

Press RECALL to see the stored event time(s) or the LAST
TIME that was on the display before the ‘auto-off’.

Low Battery Indicator When ‘

LOW BATTERY’ appears in

the upper left corner of the display, press STOP to stop timing.
Replace the battery with a new ‘AA’ alkaline battery. If the bat­tery is not replaced, the display will begin to dim in a short time.

Trouble-Shooting If the display ever seems ‘frozen’, or if

the stopwatch does not operate when a new battery is installed,
remove the battery for ten to fifteen seconds and then reinstall the
battery. Make sure that the battery polarity is correct.

Technical Support

Timing two or more intervals will cause the previous interval to
be stored as ‘LAST TIME’. After you press STOP, press
RECALL to display the LAST TIME.

Press-and-hold RESET to cause the stored LAST TIME as well
as the displayed time to be set to zero.

Timing Multiple Events After you press START to start

timing, press-and-release the EVENT button to store the recorded
time as an ‘event’. Every time that you press ‘EVENT’, the num­ber of events that have been recorded is displayed as ‘

EVENT N’

(where N is the event number). EVENT may be pressed up to 9
times before timing automatically stops. Otherwise, press STOP
to stop timing.

Example: EVENT 3 is displayed

Press RECALL to view ‘

EVENT 1’. Press RECALL repeatedly to

step through all the stored event times. Press-and-release the
RESET button to clear the display. Stored events will be retained.
Press START to begin timing again. When you clear the display,
‘

EVENT (blank)’ appears because the ‘0.00’ time in the display is

not a stored event time, but the previous events are still in stor­age. Whenever events are stored using the EVENT button, any
LAST TIME that was recorded can no longer be recalled.

For assistance with any PASCO product, contact PASCO at:

Address: PASCO scientific

10101 Foothills Blvd.
Roseville, CA 95747-7100

Phone: [phone] (worldwide)

800-772-8700 (U.S.)

Fax: [phone]

Web: www.pasco.com

Email: [e-mail]

Limited Warranty

For a description of the product warranty, see the PASCO catalog.

Copyright

The PASCO scientific 012-10091A Stopwatch Instruction Sheet is copy­righted with all rights reserved. Permission is granted to non-profit educa­tional institutions for reproduction of any part of this instruction sheet,
providing the reproductions are used only in their laboratories and class­rooms, and are not sold for profit. Reproduction under any other circum­stances, without the written consent of PASCO scientific, is prohibited.

Trademarks

PASCO and PASCO scientific are trademarks or registered trademarks of
PASCO scientific, in the United States and/or in other countries. All other
brands, products, or service names are or may be trademarks or service
marks of, and are used to identify, products or services of, their respective
owners. For more information visit www.pasco.com/legal.

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