Pulsafeeder Pulsar DLCM - Manual (Page 45)

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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:
SPEED 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 Ratio Option, enter a value of 100%.
7. The DLCM 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].
8. The DLCM will then return to its original operating mode.
7.1.3 Reverse Acting Analog Input Signal Calibration
To set up a reverse acting application, follow the above Analog Input Calibration procedure with the
following changes to step 4 and step 5. You can reverse Input #1 or Input#2 of the one and two signal
calibration procedures separately.
1. In step 4, when the display requests the minimum analog signal value (0% flow), you should send the
DLCM the high analog signal value (i.e., 10mA, 20mA or 5 volts).
INPUT ANALOG MIN
0% = XX.XmA
Send High
(20mA) Signal
The DLCM will store this as the 0% analog input signal value. As the analog signal varies, the DLCM
will display the fluctuating values. Wait approximately 10 seconds for the signal to stabilize. Press
[ENTER] to accept this as the 0% analog signal value.
2. In step 5, when the display requests the maximum analog signal value (100%), you send the DLCM the
low analog signal value (i.e., 0mA, 1mA, 4mA or 1 volt).
INPUT ANALOG MAX
100% = XX.XmA
Send Low
(4mA) Signal
The DLCM will store this as the 100% analog input signal value. As the signal varies, the DLCM will
display the fluctuating values. Wait approximately 10 seconds for the signal to stabilize. Press
[ENTER] to accept this signal as the 100% analog signal value.
You can confirm the reverse acting input signal calibration by re-entering the Analog Input Calibration
menu. The first screen summarizes your calibration.
0% = 20.0mA
100% = 4.0mA
3. Press [CAL] again to cancel the calibration at this point.