Operating Instructions
Frequency Converter FM-1D/K
Digital-analogue-converter
and flow rate indicator for water meters
Contents
1. Description
2. Mounting
3. Connection
4. Calibration by hand
5. Protection
6. Test mode
7. Operation
8. Lightning protection
9. Trouble shooting
10. Replacing fuses
1. Description
FM-1D/K is a µP-controlled frequency
converter with display.
It converts pulses into proportional current for flowrate display.
Input from the pulsers are converted to:
• Standardized current
• Pulse totalization
• LED display
2. Mounting
Snap action on
35mm top hat
rail acc. to EN
50022
remove from
top hat rail
Wall mounting
with two screws
M5M4
5060
85
+ Sensor -
U+
N PE 24 VAC/DC
12345678
+
-
+
-
FM-1D/K
select
3. Connection
Note:
• max cable cross section is 2.5 mm
2
• check power supply voltage before using
• with 24 VDC operation, the polarity is irrelevant
• Technical Data please see leaflet L S 5100 GB
Safety information
When making the electrical connections, it is
essential to disconnect the FM-1 D/K from the
power supply.
The connection of the FM-1D/K is only allowed by
a specialist in accordance to the common safety
standards.
Connection of 3-wire-sensors
4. Calibration by hand
+ Sensor -
U+
L N PE 24 VAC/DC
12345678
+-
FM-1D/K
select
+
-
Status LEDs
select keychange keys
LED display
Calibration
After connecting the FM-1 D/K needs to be calibrated:
1. Select With the SELECT- button the programming
parameters can be chosen. The status LED indicates
the actual selection.
2. Change By pressing either the (+) or (-) button the
status LED and the first placed digit will flash. With
the (+) and (-) button the settings can be changed.
To activate the second placed digit the SELECT-but
ton must be pressed.
3. Save To save the chosen settings the SELECT-but
ton must be pressed after changing the last right
hand digit.
The settings will not be lost after a power failure.
Setting example
Water meter WPD DN 80
Pulser Opto OD 01 (1 imp = 1 Ltr.)
Current output 0 ... 20 mA
Max. flowrate 0 ... 100 m
3
/h
Pulse output 1 Imp. = 1 m
3
1. Flowrate range
After switching on, the display indicates ”0000.”.
Pressing either the (+) or (-)-button the FM-1 D/K
changes to the programming mode. The left digit of the
display will flash. Set the digit ”0” with the (+) or (-)-button. Pressing the SELECT-button changes to the second digit. As described set the 2.,3.,4. digit and the decimal point.The display should indicate ”0100.”. The possible flowrate range is 0.001 ... 9999. m
3
/h
2. Counter reading
The FM-1 D/K counter reading can be set to match the
counter reading of the water meter. When the upper status LED blinks the first 4 digits can be set and when
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