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In some cases, positive trigger levels may be required for measuring Dwell, ms-
Pulse, or Duty. Press the (±Trigger) button for more than 1 second to toggle
between positive (+) and negative (-) trigger level for the selected trigger level.
NOTE: Positive (+) trigger or negative (-) trigger is to identify whether the On
or Off portion of the signal under test is of measuri ng interest. For
example, if you get a reading of 10 % Duty Cycle in the Positive (+)
Trigger (On portion), you then will get a reading of 90 % Duty Cycle in
the Negative (-) Trigger (Off portion).
5-5. RPM Selection
In the RPM function, the meter defaults to RPM
for conventional 4-stroke engine.
Press the button momentarily to toggle to RPM for 2-stroke or DIS
engine. And also in the , , or Hz function, press the button momentarily
to toggle between RPM and RPM setting for the dual display RPM function.
5-6. Relative Mode
Press the (REL ) button for more than 1 second to select the Relative
Zero ( ) mode with LCD annunciator turned on. This feature allows the user
to offset the measured value with a relative reference value.
Press the (REL ) button for more than 1 second to exit relative mode and
resume normal measurements.
5-8. Memory (Data Store, Recall, & Clear) Mode
Press t he but ton momentarily to act ivat e the Memory mode wit h LCD
annunciat ors and turned on. The menu screen shows four menu
selections : (Store), (Recall), (Clear), and (Exit).
Store : Press the menukey 1 to store
the di splay ing dat a. The av ai lable
memory locat ion number moment arily
shows in the secondary display and
“
S A U E
” moment ari ly s how s in the
primary display. If no memory location is
available, “
F U L L
” and “ ” momentarily
show in the primary display and in the
secondary di splay respect ively and
nothing is stored, when you must clear
all the memory locations by pressing
the Clear menukey t o secure memory
locations. You can store up to 20 data.
You can exit the store mode by pressing
either the EXIT menukey or the
button momentarily.
5-7. Hold or Auto Hold
Press the but ton momentarily t o activate the Hold function with LCD
annunciator turned on. P ress this button momentarily again to exit Hold
function. This feature freezes the display for later view.
Press the (Auto Hold) button for more than 1 second to activate the Auto Hold
function with LCD annunciators turned on. This feature automatically
freezes t he dis play and t he met er beeps when the measurement reading is
stabilized. The displayed value will be updated when a new measurement value is
stabilized. This mode is very useful when it is impossible for you to press the
button or see the meter display while probing and taking measurements. Press the
(Auto Hold) button for more than 1 second to exit Auto Hold function.
The 4 selectable trigger levels are cycled through as follows :
• RPM :
+TRIG
+TRIG
+TRIG
+TRIG
• Dwell, ms-Pulse, Duty
:
–TRIG
–TRIG
–TRIG
–T R I G
