2
SURFACE SPEED METRIC CONVERSION
Conversions such as YPM to mPM or mPM to YPM may be ob-
tained from the memory only by switching from one mode to an-
other.
OPERATION
1. Place adapter or wheel on shaft (as shown).
CAUTION: Do not attach master speed wheel on extension shaft.
The wheel may slip off during measurement.
2. Turn selector switch to desired unit.
3. After attaching proper adapter or wheel, bring it into contact
with rotating object or moving surface whose speed is to be mea-
sured. Apply only enough pressure to eliminate slip. The selected
function will be shown “blinking” above the display digits.
4. Press and hold the on-off switch. Display will update approxi-
mately every second.
5. Observe speed for as long as it is desired.
6. On-off switch must be released prior to removal of tachometer
from rotating object if last reading must be captured.
7. After release of power switch, the last reading will be displayed
for approximately 5 minutes. Readings will be retained in memory
for 5 minutes and can be extended any number of additional 5
minute periods by re-pressing the memory switch.
MEMORY RECALL
Automatic Memory
The following are automatically stored in memory for 5 minutes
following release of the power switch:
• Last reading
• Maximum reading
• Minimum reading
DT-105A:
DT-107A
To fill all three memory spaces, unit must operate for about 5 sec-
onds. If any of the above memory readings are missing, unit must
operate a few seconds longer.
Memory Selection
The DT-100A has the capability of storing 10 extra readings in its
memory. These readings can be obtained from the same machine
or many machines (up to 10) by pressing the memory switch mo-
mentarily as the reading you wish stored appears on the display.
An “M” with an integer will appear on the top of the display mo-
mentarily, and will be stored in memory. Up to 10 readings can
be stored.
NOTE: All memory data will be erased if automatic shut-off has
occurred. To recall a specific reading, press the memory switch
until the desired reading shows up on the display along with its
memory position. To erase all data from the memory, press the
memory switch for at least 5 seconds until display shows CCCCC.
If you hold the memory switch, the display will continue to show
CCCCC until the switch is released, then will default to 0.00.
BATTERY REPLACEMENT
Low battery voltage is indicated by LO BAT on the display. Re-
move end cover by using a coin or appropriate screwdriver and
replace both batteries. Please note polarity.
1.800.561.8187
-Direct.ca
