Pulsafeeder Pulsar DLC - Manual (Page 41)

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Send the low analog signal to the DLC (i.e., 0mA, 1mA, 4mA or 1 volt input to the J4 Current 1
terminals) from the signal generating device (e.g., PLC). Refer to Section 5-Installation: Low Voltage
Input and Figure 5 for the wiring instructions. It is highly recommended that you use the actual signal
the DLC will be receiving during operation. The DLC will display its 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 3.6mA. The DLC also
accepts voltage inputs (0-5VDC), but displays only mA. It is only important that the DLC detects the
full range of the instruments output. The DLC will store this value as the 0% analog signal value. As
the analog signal varies, the DLC will display the fluctuating values. Wait approximately 10 seconds
until the value displayed stabilizes and press [ENTER] to accept it as the 0% flow analog signal value.
5. The display prompts you to input the maximum analog signal value, 100% flow. Send the maximum
analog signal to the DLC (i.e., 10mA, 20mA or 5 volts).
INPUT ANALOG MAX
100% = XX.XmA
As the signal varies, the DLC will display the fluctuating values. Wait approximately 10 seconds until
the value stabilizes and press [ENTER]. The DLC stores this value as the 100% flow analog signal
value.
If the range between the minimum and maximum analog signal values is less than or equal to 2mA, the
DLC will display the following:
RANGE TOO SMALL
RE-ENTER
Press [ENTER] to return to step 4 to input the analog signal values again.
6. 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 pump's output from 0 to 50% flow over the 4-20mA range). The display reads as
follows:
INPUT RATIO
50% = 19.8mA
To use the ratio option, Press [UP] or [DOWN] to set the ratio value. Press [ENTER] to accept the
setting.
If you do not want to use the Input Ratio Option, enter a value of 100%.
7. The DLC prompts you 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.