Operating Procedures
Instruction manual
40
The pulse Output must be Off in order to change the Volume per pulse.
4.
Select a Pulse width (in ms) to suit the particular application – e.g. electro-mechanical
counter. Refer to the manufacturer’s data sheet for the minimum pulse width.
5.
Select Exit and press the ENTER key to return to the FLOW READING screen.
Selecting the pulse output frequency mode
1.
With the instrument operating in the FLOW
READING mode, press the Pulse function key
to access the PULSE OUTPUT screen.
2.
To change the pulse output to ‘frequency’
mode, select the Output menu option then
select Frequency as required.
3.
A1 Pulse Frequency is ON message appears in
the second line of the display.
4.
Select Exit and press the ENTER key to return
to the FLOW READING screen.
Calibrating the pulse frequency range
1.
With the instrument operating in the FLOW
READING mode, press the Pulse function key
to access the PULSE OUTPUT screen.
2.
Select Max Pulse Freq (Hz) and enter the
required value.
3.
Select Flow at Max Freq and enter the
required value (l/s).
4.
Select Exit and press the ENTER key to return
to the FLOW READING screen
The Calculated Pulse Value field is automatically calculated as:
𝐶𝑎𝑙𝑐𝑢𝑙𝑎𝑡𝑒𝑑 𝑃𝑢𝑙𝑠𝑒 𝑉𝑎𝑙𝑢𝑒 =
𝐹𝑙𝑜𝑤 𝑎𝑡 𝑀𝑎𝑥 𝐹𝑟𝑒𝑞
𝑀𝑎𝑥 𝑃𝑢𝑙𝑠𝑒 𝐹𝑟𝑒𝑞 (𝐻𝑧)
This value is often required to be programmed into the device that is receiving the pulses to
enable it to calculate the correct flow rate – for example, when connecting the pulse output to
a Calec energy meter.
NOTICE
Содержание PORTAFLOW 330
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