Kowa Seiki DIGI-VAC User Manual

Kowa Seiki 4-Channel Vacuum Meter User Interface - Overview

1.0 DIGI-VAC Overview

1.1 What can the DIGI-VAC do?

The DIGI-VAC is designed to aid in the tuning of the carburetors by providing a means to accurately adjust all
carburetors to exactly the same airflow. Equal airflow in all carburetors provides the optimal conditions for proper
engine operation and power output.
The DIGI-VAC also provides a unique measurement mode whereby each carburetor is checked for any blow-back.
Blow-back is caused by a leaky or defective inlet valve or one or more leaky gaskets in the intake path.
1. Displays vacuum for each of the four input channels.
2. Display Digital RPM and...
3. Simultaneously displays RPM on analog meter
4. Stores for future recall the highest readings during the previous measurement. This is not limited to just the
specific measurements that may have been made but the maximum values for each measurement mode and
input channel of the instrument.
1.2 What's on the Display?
The Liquid crystal display (LCD) is comprised of three separate sections.
1. Four-digit numeric display. Displays engine RPM when channel 1 is connected to the engine under test.
2. Bar graphs. Four bar graphs, one for each input channel used to display vacuum and pressure
3. Function indicator arrows . Five pointers arranged around the outside edges of the display and are used to
indicate the current measurement mode is and current measurement scale.

1.3 What do the Keys do?

The DIGI-VAC has a keypad made up of four keys. An overview of the keys and their functions is provided here to
familiarize you with their general usage. A detailed description of the key functions and usage is found in other
sections.
Power key
The power key provides three separate functions.
1. Power ON - Turn on the DIGI-VAC.
2. Deletes any readings stored in the HOLD memory.
3. Power + HOLD/RUN enable or disable the backlight to save power.
V-P / AVG key
This key toggles between two functions.
1. V-P mode to measure vacuum and pressure for diagnostic use.
2. AVE mode to measure vacuum only for carb balancing.
HOLD / RUN key
This key toggles between two functions.
1. HOLD mode displays the maximum measurement value achieved during the current test.
2. RUN mode displays the current measurement value as it changes up or down.
1.4 How is the front panel organized?
The DIGI-VAC front panel is separated into two parts, one on each side of the display. The left side has the low
vacuum and V-P measurement scales, while the right side has the high vacuum measurement scale. Each bar graph
is labeled along the bottom of the display with 1-2-3-4 indicating which probe it is displaying.
Along the right side of the instrument are located the four vacuum connectors. The channel associated with each
connector is marked along the right edge of the front panel.