Totalizers made easy
(or what is a Totalizer Factor anyway?)
All Chessell Recorder totalizers act in the same way. The value of the input channel or DV is divided by the factor each secondand the result is stored. Whole numbers are sent to the totalizer value as they are accumulated. The basic factor is the number of seconds in the measured unit-of measure, i.e.
- FEET PER SECOND (FPS) = 1.0 sec
- GALLONS PER MINUTE (GPM) = 60 sec
- STANDARD CUBIC FEET PER HOUR (SCFH) = 3,600 sec
- MILLIONS OF GALLONS PER DAY (MGD) = 86,400 sec
EXAMPLE: A flow of 100 GPM would have a factor of 60 (seconds). Each second at a constant 100 GPM, 100/60 would be stored. At the end of 60 seconds, the value would be 100/60 X 60 or 100 GAL.
The main difference between the different model recorders is how this factor is formatted. In the 340 and 392 recorders, it is in the following format (scientific notation):
- FACTOR = MANTISSA x 10 EXPONENT
While 4xxx recorders use simple multiplication:
- FACTOR = PERIOD SCALAR x UNIT SCALAR
The factor in a 5000 series recorder is entered solely as the period scalar.In either case, any scaling should be done by adjusting the unit scalar. The period scalar should be left as shown below.
| 340 AND 392 FACTORS | MEASURED VALUE | 4000 SERIES FACTORS | 5000 SERIES FACTORS |
| MANTISSA | EXPONENT | TIME UNITS | UNITS SCALAR | PERIOD SCALAR | UNITS SCALAR | PERIOD SCALAR |
| 1.0000 | 0.0 | PER SECOND | 1.0000 | 1 | 1 | 1 |
| 6.0000 | 1.0 | PER MINUTE | 10.000 | 6 | 1 | 60 |
| 3.6000 | 3.0 | PER HOUR | 100.00 | 36 | 1 | 3600 |
| 8.6400 | 4.0 | PER DAY | 100.00 | 864 | 1 | 86400 |
| 8.6400 | 1.0 | PER DAY x1000 | 0.1 | 864 | 1000 | 86400 |
