Gemini 4100 Instruction Manual page 21

STEP 3 - Determine the Scale Multiplier Value, "SCM", and calculate the Scale
Factor, "SF", using Formula #3 of Appendix "E".
A Scale Multiplier value of 0.1 is chosen to provide the maximum number of
significant digits in the Scale Factor.
SF = K
SF = 0.083333/0.1 = 0.8333
SCALING THE RATE INDICATOR
In this application the rate indicator can be programmed with the same scale
factor and scale multiplier values as obtained when scaling the counter. The only
other scaling that would be required is choosing the proper Rate Conversion
Factor, to obtain the display in the desired time units. The application calls for the
rate to be indicated in feet per minute, therefore, the Rate Per Minute Rate
Conversion Factor is selected.
STEP BY STEP PROGRAMMING OF THE GEMINI 4200
STEP 1 - Enter code 41 (Unit Personality). Select and enter a mode identifier of
1, for the Gemini to operate as a Counter and Rate indicator.
STEP 2 - Enter code 42 (Reset Button & Terminal Actuation Modes). Select and
enter mode 2 to reset the counter when reset is activated.
STEP 3 - Enter code 43 (Inputs 1 & 2 Response Modes). Select and enter mode 1,
"Count with Inhibit".
STEP 4 - Enter code 44 (Counter B Number of Count Edges). Select and enter
mode 1 for single edge counting.
STEP 5 - Enter code 45 (Counter B Scale Multiplier). Select and enter mode 2 for
a scale multiplier of 0.1.
STEP 6 - Enter code 46 (Counter B Decimal Point & Leading Zero Blanking).
Select and enter mode 1 for no decimal point.
STEP 7 - Enter code 51 (Output Assignment). Select and enter mode 1 to assign
Output 1 to the rate indicator and Output 2 to the counter.
STEP 8 - Enter code 52 (Output 1 Termination Modes). Select and enter mode 6
for boundary operation. Output 1 will activate when the maximum speed
value, Preset 1, is exceeded. Output 1 will deactivate when the rate decreases
to a value below the maximum speed.
Note: The Timed Output 1 Value, code 53, is not used in this application.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
/SCM
R
STEP 9 - Enter code 54 (Output 2 Termination Modes). Select and enter mode 4
for Output 2 Terminate at Manual Reset.
Note: The Timed Output 2 Value, code 55, is not used in this application.
STEP 10 - Enter code 56 (Counter B Reset Modes). Select and enter mode 1 for
manual reset to zero.
STEP 11 - Enter code 61 (Rate Right Hand Dummy Zeros). Select and enter
mode 4 for no right hand dummy zeros.
STEP 12 - Enter code 62 (Rate Conversion Factor). Select and enter mode 2 for a
Rate Per Minute conversion factor.
STEP 13 - Enter code 63 (Rate Minimum Update Time). Select and enter mode 1
for a minimum update time of 0.5 Second. If the rate display jumps around, a
larger minimum update time can be used to provide averaging.
STEP 14 - Enter code 64 (Rate Scale Multiplier). Select and enter mode 5 for a
Scale Multiplier of 0.1, as previously determined.
STEP 15 - Enter code 65 (Rate Decimal Point & Leading Zero Blanking). Select
and enter mode 1 for no decimal point.
STEP 16 - Enter code 66 (Operator Accessible Functions Modes). Select and
enter mode (+)1 for no functions except reset enabled. When the "PGM.DIS."
terminal is connected to "COMM.", the only changes that will be possible is
resetting the counter.
STEP 17 - The "+/-" key is pushed, if necessary, so that the rate is being indicated
on the Gemini 4200. The "3" key is then pushed to call up the Rate Scale
Factor. The value is changed to 0.8333.
STEP 18 - The "+/-" key is pushed, so that the count is being indicated on the
Gemini 4200. The "3" key is then pushed to call up the Counter Scale Factor.
The value is changed to 0.8333.
STEP 19 - Enter a Preset 1 value of 250, by pushing the "1" key and changing the
value to 250.
STEP 20 - Enter a Preset 2 value of 15,000, by pushing the "2" key and changing
the value to 15,000.
After the unit is programmed, the "PGM. DIS." terminal is connected to
"COMM." to prevent any unauthorized or accidental mode changes. The
function codes can, however, be called up to view or verify that the proper
modes are entered.