Pulsafeeder Pulsar DLC XP RC - Manual (Page 32)

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Send the low analog signal to the DLC – XP (0 mA, 4 mA, 1 mA or 1 volt) from the control room.
Refer to Section 5 – Installation: Low Voltage Input and Figure 6 for wiring instructions. It is
highly recommended that you use the actual signal the DLC – XP will be receiving in order to
properly configure the settings. The DLC – XP will display it's interpretation of the received signal.
Do not be alarmed if the signal does not match the instrument. For example, your instrument is
generating 4.0mA but the DLC display reads 3.68mA. It is only important that the DLC – XP detects
the full range of the instruments output. The DLC – XP will digitally store this value as the 0%
analog signal value. As the analog signal varies, the DLC – XP will display the fluctuating values.
Wait until the value displayed stabilizes and press [ENTER] to accept it as the 0% analog signal
value.
4. The display prompts the user to input the maximum analog signal value, 100%. The user sends the
analog signal to the DLC – XP (20 mA, 10 mA or 5 volts).
INPUT ANALOG MAX
100% = XX mA
As the signal varies, the DLC – XP will display the fluctuating values. Wait until the value stabilizes
and press [ENTER]. This value will digitally stored as the 100% analog signal value.
If the range between the minimum and maximum analog signal values is less than 2 mA, the DLC –
XP will display the following:
RANGE TOO SMALL
RE-ENTER
Press [ENTER] to return to step 3 to input the analog signal values again.
5. You are now ready to set the Signal Ratio. This option allows you to scale the Analog signal input to
the pump output. Use this option only if you want to limit the range of operation of the pump (e.g.,
you want to limit the pumps output from 0 to 50% over the 4-20mA range). The display reads as
follows:
INPUT RATIO
100% = 19.8mA
To use the ratio option, use [UP]/[DOWN] and [ENTER] to enter each position of the ratio value. In
the example above, the line located under the left hand digit represents the character being changed.
After setting the desired value for the first position (1 in this case), press [ENTER] and the line under
the digit will move to the next digit. Continue to use [UP] and [DOWN] in conjunction with
[ENTER] to set the correct percentage. Press [ENTER] to accept the complete menu.
Note: If you do not want to use the Input Ratio Option, enter a value of 100%.
6. The DLC – XP prompts the user to accept the analog signal calibration programmed in the above
referenced steps.
CONFIRM CHANGE?
YES
Press [ENTER] to accept. If you do not want to accept the new analog signal calibration, press [UP]
to scroll to {NO} and press [ENTER]. The display will then return to its original operating mode.