FW_F112P_v1901_02_EN.docx
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CALCULATION
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The flow rate is calculated by measuring the time between a number of
pulses, for example 10 pulses. The more pulses the more accurate the
flow rate will be. The maximum value is 255 pulses.
This setting does influence
the update interval for the flowrate and thus,
indirectly the update interval of the analog output..
(maximum update
10 times a second). If the output response is too slow, decrease the
number of pulses. For low frequency applications (< 10Hz): do not
program more than 10 pulses, else the update time will be very slow.
For high frequency applications (> 1kHz): do program 50 or more pulses.
CUT-OFF
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This setting is used to set the threshold for a minimum flow. If during this
time less than XXX-pulses are generated (refer to Calculation), the flow
rate will be shown as zero. The cut-off has to be entered in seconds.
3.1.4.
EXPLANATION OF SETUP MENU 3 - DISPLAY
FUNCTION
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This setting can be set to display total or rate.
•
When 'total' is selected, simultaneously, total is shown with the large
digits and flow rate with the smaller digits. When SELECT is pressed,
the accumulated total is shown temporarily.
•
When 'rate' is selected, only flow rate will be shown with the large
digits together with its measuring unit. When SELECT is pressed, the
total and the accumulated total are shown temporarily.
LIGHT
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The backlight brightness can be adjusted from 0% (off) to 100% (full
brightness) in steps of 20%.
When the F112-P is only loop powered, the backlight is disabled. An
external power supply is required to supply the backlight.
3.1.5.
EXPLANATION OF SETUP MENU 4 - POWER MANAGEMENT
When used with the internal battery option (type PB/PC), the user can expect reliable measurement
over a long period of time. The F112-P has several smart power management functions to extend
the battery life time significantly. Two of these functions can be set.
LCD NEW
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The calculation of the display-information influences the power
consumption significantly. When the application does not require a fast
display refresh rate, it is strongly advised to select a slow refresh rate.
Please understand that NO information will be lost; every pulse will be
counted and the output signals will be generated in the normal way.
At a key press, the display refresh rate will switch to FAST for 30
seconds. When 'OFF' is selected, the display goes off after 30 seconds
after the last key press. The display temporarily comes on after a key
press.
Example battery life-time with a coil pick-up:
•
1kHz pulse and FAST update: about 2 years;
•
1kHz pulse and 1 sec update: about 5 years.
After a button has been pressed by the operator - the display refresh rate
will always switch to fast for 30 seconds. When 'OFF' is selected, the
display will be automatically switched off after 30 seconds since the last
action. The display will temporarily turn on after touching one of the keys.
BATTERY MODE
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The F112-P has two modes: operational or shelf.
After "shelf" has been selected, the F112-P can be stored for several years; it will
not process the sensor signal; the display is switched off but all settings and totals
are stored. In this mode, power consumption is extremely low.
To wake up the F112-P again, press the SELECT/
key two times.
