Pulsafeeder Pulsar DLCM - Manual (Page 44)

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7.1.2.2 Analog Input #2 Calibration
The following is a minimal procedure for calibrating Analog Input #2 if the 2 – Signals option is to be
used. Input #2 controls the motor speed. For more information about the Analog Input signal, refer to
Section 7.2.15 Analog Mode.
1. Press [CAL]. The {CALIBRATE / PUMP FLOW} screen is displayed.
CALIBRATE
PUMP FLOW
2. Press [UP] to scroll to the {CALIBRATE / ANALOG IN}.
CALIBRATE
ANALOG IN
Press [ENTER] and the {CALIBRATE / STROKE POSITION} screen is displayed.
CALIBRATE
STROKE POSITION
Press [UP] to get
CALIBRATE / MOTOR SPEED
3. Press [ENTER] and the {0% = X.XmA / 100% = XX.XmA} screen is displayed.
0% = 4.0mA
100% = 19.8mA
The display shows the previous 0% and 100% flow analog signal values:
If you would like to skip the calibration and change only the Signal Ratio, press both [UP] and
[DOWN] simultaneously. Skip to step 6.
Press [ENTER] to continue with Analog Input Calibration.
4. The display prompts you to input the minimum analog signal value, 0% flow.
INPUT MOTOR MIN
0% = XX.XmA
Send the low analog signal to the DLCM (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 Connections and Figure 5 for the wiring instructions. It is highly recommended that
you use the actual signal the DLCM will be receiving during operation. The DLCM 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 DLCM display reads 3.6mA. It is only
important that the DLCM detects the full range of the instrument’s output. The DLCM will store this
value as the 0% analog signal value. As the analog signal varies, the DLCM 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 DLCM (i.e., 10mA, 20mA or 5 volts).
INPUT MOTOR MAX
100% = XX.XmA
As the signal varies, the DLCM will display the fluctuating values. Wait approximately 10 seconds
until the value stabilizes and press [ENTER]. The DLCM will digitally store 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
DLCM will display the following:
RANGE TOO SMALL
RE-ENTER
Press [ENTER] to return to step 4 to input the analog signal values again.