Design, Assembly and Service Manual
Page 33 of 44
Induction flow meter FMG600 series
Frequency outputs
In the frequency modes, the output signals will be impulses of impulse-to-gap ratio 1:1. The frequency range
available is from 1Hz to 10kHz.
Comment:
The electronic unit of the meter includes only one frequency generator. It is therefore impossible
to select different frequencies for each output, or combine the fixed-frequency mode at one output with
frequency related to flow rate mode at the other output. On the other hand, the operator may select the
frequency related to flow rate mode in the positive direction at one output with that in the negative direction
at the other output, with the same frequency-to-flow-rate ratios.
Regarding the flow rate conditions, the frequency outputs can be operated in three different modes (see
below).
Frequency for Q+
Frequency for Q-
Frequency for |Q|
Menu:
Output function, depress / Output 1 (2) function, depress / Frequency for Q+, depress .
The display will read “Flow rate per 1kHz xxxx“. Move the cursor using push-button , and
increase/decrease the values at various “x” positions using push-buttons or , respectively. Replace xxxx
by a figure representing the maximum flow rate. Depress . The display will read “Value entered Press any
key”. Press any key, preferably . This will return the display to the menu items “Output 1 function” or
“Output 2 function”.
The fixed-frequency mode is used for servicing purposes only. The required frequency is set in Hz within the
range of 1 to 10,000 in steps of 1Hz.
Menu:
Output function, depress / Output 1 (2) function, depress / Fixed frequency, depress .
The display will read “Fixed frequency xxxxx“. Move the cursor using push-button , increase/decrease the
“x” values using push-buttons or , respectively. Replace xxxxx by a figure equal to the desired
frequency in Hz. Depress . The display will read “Value entered Press any key”. Pres any key, preferably
. This action will return the display to the menu items “Output 1 Function” or “Output 2 Function”.
To return to the basic menu, depress push-button .
Negative (non-negative) flow direction
This mode is used to identify the flow direction. In the case of negative flow direction, the output is closed
(open).
Menu:
Output function, depress / Output 1 (2) function, depress / Negative (Non-negative) flow
direction, depress .
The display will return to the menu items “Output 1 Function” or “Output 2 Function”.
To return to the basic programming menu, depress push-button .
Error (no error) condition
In the case of a meter error, the output will close (open) and stay so as long as the error condition exists.
Menu:
Output function, depress / Output 1 (2) function, depress / Error (No error) condition, press
