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FDT-25W Wall Mounter Ultrasonic Flowmeter
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4.30 How to use automatic amending function for offline
compensation
Use menu window 83 turn on or turn off this function. When the function is enabled, the flow meter will
estimate the average flow uncounted (or ‘lost’) during the offline session and add the result to the
totalizer.
This function is not recommended. The user should manage to avoid the offline time to keep precision
of the measurement result.
4.31 How to use batch controller
Please do the following to use the batch controller:
1) Go to menu window 80 to select the trig signal.
2) Go to menu window 78 (OCT output) or 79 (relay output), select “8 Batch Control”.
3) Use menu window 81 to set the flow batch value (dose).
4.32 How to adjust the analogue output
We have adjusted every set of meter before delivery. Unless you find the current indicated in menu 58
is different with the actual current output, please do not do this operation.
Press keys MENU ▼/- 0 , use the password ”4213068” to enter the window. Notice: the window
will close after power off and the password will become invalid then.
Press keys MENU ▼/- 1 , to adjust the 4mA current output: use precision ammeter to measure the
output current, at the same time, use ▲/+
▼/- to adjust the digital on the flow meter until the
ammeter indicate 4.00. Then press ENT to enter the window of adjusting the 20mA output.
When finished adjusting, you have to use menu window 26 to store the result into the flash memory, so
that it will be solidified and will not be lost even the reserve battery removed.
4.33 How to solidify the parameters
There are three kinds of parameters for the new generation FDT-25W:
1) Current parameters, the parameters are stored in the RAM. They will be lost when one cut the power
or remove the reserve battery.
2) Solidified parameters, you may use menu window 26 to store the parameters in the Flash memory
and they will not be lost even power off. This menu window is also a switch for the parameters in flash
memory to be loaded when power is turned on. The default option is that the parameters will be loaded.
So if the parameters are very stable, you may need this option.
3) User frequently-used parameters, you can use menu window 27 to store or restore from the internal
Flash memory, as many as 9 different pipe parameter configurations.
4.34 How to enter the parameters of user-type-transducer
If a user-type-transducer is selected in menu window 23, you need proceed to enter additional 4