Sontex Supercal 5 I, Инструкция по эксплуатации

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52 Instruction for use | Supercal 5
11.7 Flow Calculation
Flow calculation is based on the time elapsed between impulses from the flow sensor.
For the first flow calculation, the calculator requires two volume pulses for the calculation
of the effective flow. Depending on the configuration, the internal flow rate calculation
and the immediate display of the current flow rate on the LCD display take place.
Configuration
The frequency of flow calculation depends on:

The number of volume pulses arriving in a predetermined time interval
(minimum/maximum waiting time).

The desired accuracy of the flow calculation.

The flow calculation parameters are set at the factory and can only be changed by
authorised test centres.
11.7.1 Calculation of the Flow Rate with Conventional Flow Sensors
With conventional flow sensors, such as mechanical flow sensors, the pulse value is given
in litres/pulse or the time for a measuring period in seconds.
The formula for the current flow rate in liters per hour is then:
Flow rate (l/h) kw × 3,600 × imp/time
kw (litre/pulse) pulse valence
Imp number of pulses per measuring period
Time duration of the measuring period [s].
11.7.2 Calculation of the Flow Rate with Fast Flow Sensors
For fast flow sensors, the pulse valency is specified in pulse/litre.
The formula applies accordingly:
Flow rate (l/h) 3,600/time × Pulse/pf
pf (pulse/litre) pulse factor
Pulse number of pulses per measuring period
Time duration of the measuring period [s].
11.8 Temperature Measurement
11.8.1 General Information
The basic measuring range of the calculator is –20 °C to +200 °C.
Approved according to MID, the measuring range is 2 °C to 200 °C. There is no approval be-
low 2 °C according to today’s valid approval regulations.
As standard, the Supercal 5 is designed for Pt500 temperature sensors. The temperature
sensors can be connected using two-wire or four-wire technology. The temperature meas-
urement itself is carried out according to the “dual slope method”. An integrated calibration
system ensures high measurement resolution and measurement stability.
If the equipment is connected to a 440, the measurement timing is:

Between 3 seconds and 30 seconds if the calculator
has an external power supply.

Between 10 seconds and 30 seconds if the calculator has no external power supply.
If a different flow sensor is usued:

Between 3 seconds and 120 seconds if the calculator
has an external power supply.

Between 10 seconds and 120 seconds if the calculator has no external power supply.