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FW_F127PELTP_v1702_02_EN
2.2
OPERATOR INFORMATION AND FUNCTIONS
In general, the F127-P operates in the operator
mode. The shown information depends on the
settings which are made in the setup menu.
The signal from the connected sensor is processed
by the F127-P in the background, independent from
the selected display refresh rate.
Fig. 3: Process information (typical)
For the Operator, the following functions are available:
Display calculated differential flow rate and calculated differential total
This is the main display information of the F127-P. After the selection of any other information, it
will always return to this main display automatically. Total is shown on the upper line of the
display and flow rate on the bottom line. When selected in the setup menu, the display shows the
flow rate only. When you press the select key, the total shows momentarily.
When "-------" is shown, then the flow rate value is too high to be shown. The arrows
indicate
the increase/decrease of the flow rate trend. If the consumption is very low, it might be that a
stable low flow rate and total is shown; this is due to the settings of the F127-P.
Clear total
The value for total can be reset. To do so, press the CLEAR/
key twice. When the key is
pressed once, the text "PUSH CLEAR" is shown. To avoid a reset at this stage, press another
key other than the CLEAR/
key or wait for 20 seconds. A reset of the total does not influence
the accumulated total.
Type IB: When a Normally Closed (NC) contact is used, the local clear total function is disabled
and a clear total is only possible with the external reset command.
Display calculated differential accumulated total
When the SELECT/
key is pressed, total and accumulated total are shown. The accumulated
total cannot be reset. The value will count up to 99,999,999,999. The unit and number of
decimals are shown according to the settings for the total.
Display line temperature and calculated flow rate INLET / OUTLET
When the SELECT/
key is pressed twice, the actual INLET / OUTLET temperature is shown at
the top line of the display. At the bottom line, the calculated INLET / OUTLET flow rate is shown
together with the engineering units for flow rate and temperature
Range error
As soon as the input value is out of the calibrated PT100 measurement range, the alarm indicator
shows. When the SELECT/
key is pressed a few times, the alarm code is shown in the alarm
display. This alarm is also activated at a wire break or faulty sensor.
(standard range -100°C - +200°C or extended range, type ZV: -200° - +800°C).
Low-battery alarm
Only use original batteries. Original batteries can be ordered at the manufacturer.
The use of unapproved batteries will void the warranty.
At the end of the battery’s life-time, the
voltage starts to drop. When the voltage
becomes too low, the battery indicator comes
on. When the battery indicator is on, install a
new and fresh battery as soon as possible.
Fig. 4: Low-battery alarm (typical)
Alarm
When the alarm indicator is shown, refer to Appendix B: Problem Solving.
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