Max Machinery 286-300 SERIES TRANSMITTERS - Manual (Page 13)

K-Factors
K-factors represent the number of pulses the transmitter outputs per unit volume of fluid passing through the
flow meter. This number is dependent on the flow meter and the transmitter resolution setting (switch S3).
Max Machinery indicators can be adjusted to display the desired units (ccs, lbs, gallons, quarts, etc.) by
using the K-factor.
Flow meters are multi-point calibrated at the factory. The K-factor varies slightly with flow rate. A graph
of this K-factor is provided for each customer. The values shown below are typical. If the output resolution
setting is changed (via S3), the K-factors will scale proportionally:
**Maximum Count Speed of Max Machinery Indicators:
Model 120 <= 7500 Hz
Model 121 <= 20,000 Hz
If the frequency output at the application’s maximum flow rate exceeds the indicator’s count speed, then
the transmitter resolution setting (S3) will need to be adjusted to proportionally reduce the
meter/transmitter’s K-Factor.
K-Factors
New K-factor Existing K factor
New Resolution
Existing Resolution
286-300-350 © 2002, Max Machinery, Inc. (13)
Min
(@24 pulses/rev)
Max
(@1000 pulses/rev)
Min
(@24 pulses/rev)
Max
(@1000 pulses/rev)
213 27.6 1150.0 1.8 828 34,500
214 2.28 95 10 380 15,870
215 0.504 21.0 40 336 14,000
216 0.142 5.9 100 237 9,870
220 2.28 95.0 3 114 4,760
221 1.02 42.5 15 255 10,630
222 0.506 21.1 38 320 13,350
241 0.386 16.1 190 1,220 50,900
242 0.132 5.50 540 1,190 49,520
243 0.0417 1.74 1400 973 40,500
244 0.0139 0.579 2800 649 27,040
245 0.00396 0.165 5600 370 15,400
*typical values; may vary by up to 5% on specific flow meters.
286-3xx K-Factor Ranges (pulses/cc) with various Max flow meters*
Combined Output
K-factor Range (pulses/cc)
Maximum
Rate
(liters/min)
Model
Maximum Output Frequency Range
(Hz)**
Discontinued