Manual Integrator Supercal 531 06-06-2011 15
3.4 Calculation of flow
The calculation of flow bases upon the volume pulses detected and cumulated within a certain time
interval.
For the first flow calculation, the integrator always requires two volume pulses to be able to calcu-
late the actual flow. Depending on the configuration the internal flow calculations are carried out
and the actual flow is indicated immediately on the LCD-display.
Configuration:
The frequency of the flow calculation depends on:
The number of volume pulses detected within a defined time interval (minimum/maximum
holding time).
The required precision of the flow calculation
The parameters relevant for the flow calculation are factory-set and can only be altered by
authorized laboratories.
3.4.1 Calculation of the flow rate with standard flow sensors
The pulse factor of standard flow sensors, such as e.g. mechanical flow sensors, is stated in
litre/pulse resp. the duration of the measuring period is stated in seconds/2.
Thus, the formula for the current flow rate in litre/hour is:
Flow rate (l/h) = kw x 3600 x pulse/time
kw (litre/pulse) = pulse factor
Pulse = number of pulses per measuring interval
Time = duration of measuring interval [s]
Examples see point 8.2.2, pages 52, 53
3.4.2 Calculation of the flow with fast flow sensors
The pulse factor of fast flow sensors is stated in pulse/litre.
The formula is as follows:
Flow rate (l/h) = 3600/time x pulse/kw
kw (pulse/litre) = pulse factor
Pulse = number of pulses per measuring interval
Time = duration of measuring interval [s]
Examples see point 8.2.3, page 53.
3.5 Temperature measurement
3.5.1 General
In principle, the measuring range of the integrator is from - 20 °C to + 200 °C.
The measuring range approved acc. to MID is from 2 °C to 200 °C. There’s no homologation below
2 °C according to the current applicable standards.
By default, the integrator Supercal 531 is designed for temperature sensors Pt500. On request,
Sontex can parameterise the integrator ex works for operation with Pt100. The connection of the
temperature sensors is possible in two-wire and four-wire technology. The temperature measure-
ment is carried out acc. to the „dual slope procedure “. An integrated calibrating system guarantees
To Next Page
Loading...
