Fluidwell E126-P-EL, Руководство пользователя

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User Manual E126-P-EL
Page 28 FW_E126-P-EL_M_v0301-01_EN
5 TEMPERATURE - WITH TYPE TA (4-20MA)
5.4 FILTER Stabilizes the temperature reading. This digital filter setting produces a
more stable but less actual reading.
The filter principal is based on three input values: the filter level (01-99), the
last calculated temperature, and the last average value. The higher the filter
level, the longer the response time of a changed value. Use trial and error
to find the best setting for your application.
RESPONSE TIME ON STEP CHANGE OF INPUT VALUE (IN % OF END VALUE)
Filter value 50% 75% 90% 99%
01 filter disabled filter disabled filter disabled filter disabled
10 7 sec 14 sec 22 sec 44 sec
20 14 sec 28 sec 45 sec 90 sec
30 21 sec 41 sec 68 sec 136 sec
50 35 sec 69 sec 114 sec 228 sec
75 52 sec 104 sec 172 sec 344 sec
99 69 sec 137 sec 227 sec 454 sec
5.5 CALIB-LOW Calibrates the input value for (0)4 mA. This setting is used because the
signal from the temperature sensor might not be exactly 4.0 mA (or 0.0 mA)
at minimum temperature. This function measures the real output value at
minimum temperature.
Make sure the offered signal is correct before calibration takes place
as this has a major effect on the accuracy of the system.
After pressing PROG, three settings can be selected:
●
CALIB: Calibrates the input with the actual "(0)4 mA" value. After
pressing enter, CAL SET is displayed as soon as calibration is
completed. From that moment, the analog value must be more than the
calibrated value before the signal will be processed.
●
DEFAULT: Reinstalls the manufacturer’s value.
●
CAL SET: Selects the last calibrated value.
5.6 CALIB-HIGH Calibrates the input value for 20 mA as the signal from the temperature
sensor might not be exactly 20.0 mA at maximum temperature. This
function will measure the real output value at maximum temperature.
Make sure the offered signal is correct before calibration takes place
as this has a major effect on the accuracy of the system.
After pressing PROG, three settings can be selected:
●
CALIB: Calibrates the input with the actual “20 mA” value. After pressing
enter, CAL SET is displayed as soon as the calibration is completed.
From that moment, the analog value must be less than the calibrated
value for a reliable measurement.
●
DEFAULT: Reinstalls the manufacturer’s value.
●
CAL SET: Selects the last calibrated value.
5.5.7 MENU 6: FORMULA
6 FORMULA
6.1 EQUATIONS TYPE Shows the formula. The type EL stands for Equations Liquid - flow
computer for corrected liquid volume.
The formula used:
Q
normal
= calculated volume at reference conditions
Q = measured volume
α = thermal expansion coefficient
Tnormal = reference temperature
T = line temperature