Gemini 4100 Instruction Manual page 29

PRESET VALUES
Whenever the display value equals the preset value, an output action will occur. This
action depends on the previously programmed modes. The preset values may vary from
-999,999 to 999,999. (Refer to "Programming the Presets, Scale Factors, Timed Outputs
& Counter Load Values" for instructions on entering the preset values.)
The Scale Factor will have a direct effect on the preset value being entered. For a Scale
Factor Value greater than one, the preset value should be an integer multiple of the Scale
Factor. If it is not, the Gemini will automatically adjust the preset value up or down to
force it to be evenly divisible by the Scale Factor.
"1" - PRESET 1 VALUE
"2" - PRESET 2 VALUE (GEMINI 4200 Only)
SCALE FACTORS A & B
"3" SCALE FACTOR - The Scale Factor, for the Value (Counter A or Counter B)
that is currently being displayed, is accessed by pressing the "3" key. To access the Scale
Factor of the "other" display value, the "+/-" key would be pushed (to change the display
to the other value), then the "3" key would be pushed.
The number of pulses counted (internal count value) is multiplied by the Scale Factor,
which changes the displayed value accordingly. A Scale Factor Value of 1.0000 would
result in a display of the actual number of input pulses that have been counted. The Scale
Factor is used primarily for conversion from existing pulses per unit of measure to the
required displayed units. This includes conversion from different units of measure (i.e
feet to meters, etc.). The Scale Factor Values may range from -5.9999 to +5.9999. Refer
to "Programming the Presets, Scale Factors, Timed Output & Counter Load Values" for
entering instructions.
It is important to note that the precision of a counter application cannot be improved by
using a Scale Factor greater than one. To accomplish greater precision, more pulse
information must be generated per measuring unit. For example, if 5 pulses are being
received per foot of material, the precision of 10th of feet cannot be attained by simply
programming a Scale Factor of 2.0000, even though the display is reading in 10ths. In this
case, the display will increment by two for each count input. Thus if an odd preset value
was entered, such as 6.7 ft., the Gemini will alter the preset to read in even tenths of feet.
Note: Use of a small Scale Factor in conjunction with a small scale multiplier could cause
the internal count value to be exceeded before the 6-digit display value is exceeded.
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COUNTER LOAD VALUES
The Counter Load Value is provided to allow the user to modify the
Counter A or B values. The Counter Load Values are reset to zero when
the Gemini is powered up. Once the Counter Load Value has been
changed, it will remain set to that value until the unit is powered down and
up. Accessing the Counter Load Value for the counter that is currently
being displayed is done by pushing the "E" button and while being held
down also pushing the "+/-" button.
"E" & "+/-" - Counter Load Value for the currently displayed counter.