Listing of K148 firmware - February 22, 2003.
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K148T0 - Programmable Down Timer (seconds)
Original release

K148T0a - Programmable Down Timer from 00m 00s to 99m 59s
Same as K148T0 but display is now 'minutes.seconds'
Added Mode 5 - Auto Repeat, Pulse Output
Defaults to '15.00' and Mode 5 (mode is fixed)
Automatic start on power up or reset.
Holding STOP on power up or reset enters programming mode.


K148T1 - Photographic Timer (60, 90, 120, 300, 600 & 900 seconds)
Original release

K148T1a - Photographic Timer (165, 15, 35, 7, 8, 5 & 12 seconds)
Same as K148T1 except for changed times
For "Police Shoot Practice Timing System"

K148T1b - Countdown Timer (1, 2, 3, 4 & 5 minutes)
Displays as MM.SS
1 second output pulse on reaching 00.00


K148T2 - Stopwatch with Pause function
Original release

K148T2a - Stopwatch with Pause function
Same as K148T2 except output pulse every second instead of every minute

K148T2b - Stopwatch
Displays M.SS.s
START button to start, STOP to pause
When paused, START re-starts, STOP resets to 0.00.0
1 second output pulse on rollover (every 10 minutes)


K148T211 - Stopwatch with Pause function
Same as K148T2 except 1 second pulse every minute instead of 20mS


K148T3 - 4-Digit Auto Ranging Audio Frequency Meter
Original release

K148T3A - 4-Digit REV counter (Tachometer)
Range = 0000 to 9999 revs/minute.
If overflow (count > 9999) then output goes low and display = "----".
Designed for a 60-slot wheel so we get a direct reading ie. 1 pulse/rev

K148T3b - 4-Digit Audio Frequency Meter
Same as K148T3 except not auto ranging.
Uses STOP button to toggle range

K148T4 - Programmable Down Timer (minutes)
Original release

K148T4v2 - Programmable Down Timer (minutes)
Same as K148T4 except add Mode 5: Auto-Repeat, Pulse Output
Defaults to 0000 minutes, Mode 5

K148T4v3 - Programmable Down Timer (minutes)
Same as K148T4v2 except added Mode 6: Auto-Reset, Output On
Defaults to 0060 minutes, Mode 6


K148T5 - Programmable Down Timer (hours)
Original release

K148T6 - Up counter with Elapsed Time Indication
4 digit up counter with elapsed time in hh.mm


K148T7 - Reaction Timer
Basically same as K148T2 except range is 0 to 99.99 seconds


K148T8 - Balance Measuring Counter
The display indicates the percentage (xxx.x) of a measurement period
(30 or 60 seconds) that the client under test is keeping the test apparatus
in a balanced state.

K148T9 - LAP timer
Two mode of operation - Cumulative and Auto-Reset
START starts timer and pulses low on every lap.
STOP toggles display mode and sets mode on power up.
On power up or reset timer/display = 00.00 if cumulative mode
                                   = 0.000 if auto-reset mode
Timing range: cumulative mode = 99.999 seconds
              auto-reset mode = 9.999 seconds
Output pulses low for 50mS on every lap input.
While timer is running:
START freezes display - timer continues running in the background.
Display shows seconds count as "SS.ss"
Pressing START again repeats the above sequence.
In auto-reset mode display always shows as "S.sss"
If STOP pressed in cumulative mode then display "S.sss", else display "SS.ss"


K148T9a - LAP TIMER with STORAGE


K148T10 - SIMPLE UP TIMER
Counts from 00.00 to 59.59 minutes (mm.ss)
If START is high then count up (even on power up or reset).
If START is low then stop counting and reset to zero.
Output pulse (20mS) every second.


K148T11 - INCREMENTING DOWN TIMER (seconds)
On power up or reset the display shows 0000 seconds.
A START pulse causes the programmed time (default = 450) to be set and the
timer starts counting down.
Further START pulses cause the programmed time to be added to the current
time.
The output is active (low) during the countdown time and resets (high) whem
the timer reaches zero.