WQG-10029-01
Note: If meter output data is available in pulses per cubic foot, this
step can be eliminated.
Multiply the pulses per cubic feet by the quantity
to be indicated.
Since the circuitry is only capable of handling
whole numbers, the factor must be rounded to
the nearest whole number (1773).
Note: When the factor must be rounded off, a small error is
introduced—in this example, .0028%. New meters being shipped
from the factory are geared to eliminate this error or maintain it at a
minimum, if possible. In applications where no error is tolerable, the
ACT-PAK instrument line contains provisions for an error correction
circuit and/or an input pulse scaler.
To start, place all of the 12 switches in the OFF
position. Setting the factor into the instrument is
accomplished by turning the dip switch ON so
that the sum of the factors equals the number
desired. There is a unique combination of factors
for each desired number. They are determined
in the following manner: select the largest binary
number from the chart that does not exceed the
balance, continue selecting and subtracting until
the balance equals zero. At this point, all factors
subtracted must be set into the instrument by
placing the associated switch in the ON position.
Act-Pak® Electronic Instrumentation
Models 1100D and 1100DN Quick Guide
Adjusting Option M Multiplier
The multiplier circuit is configured in binary coded
decimal (BCD) and is adjustable to any number
between 0.0001 and .9999. To set the multiplier, the
following procedure is suggested:
1. Determine the multiplier necessary to indicate the
units required.
2. Remove the Act-Pak front panel assembly from
the instrument cabinet and locate the multiplier
module.
Note: Multiplier is a separate PC board in the center of the instrument
assembly.
3. Rotate the assembly so the printing on the
multiplier circuit board is readable from left to right,
as shown in the next illustration.
4. Setting the multiplier is accomplished by rotating
the pointer on the digits associated switch to the
number desired using a small screwdriver.
t
CAUTION
The switch selector must be in the detent and not left
between two digits or erratic operation will result.
