B&B Electronics Preparation e.g. M3LDY-R/A, Range Label Input & Output Ranging

■PREPARATION (e.g. M3LDY-R/A)

1)Mount the DIP-SW-configured M3LDY on to a DIN rail.

2)Connect the M3LDY to a simulator and a multimeter and to a DC power source as shown to the right.

3)Turn the power supply on and wait for 10 minutes.

M3LDY

4)	Fine Span Calibration Mode: Push MODE button and
	confirm that the LD3 green light instead of LD2 is blink-
	ing.
5)	Use UP (increase) and DOWN (decrease) buttons to adjust
	the output to 100%.
6)	Run Mode: Push MODE button and confirm that only the
	LD1 green light is blinking.

Simulator

+

–

2

3

M3LDY		Multimeter
		+
	7	–
8

DC Power Source

11

+ –

12

Note 1: Calibration steps can be skipped when not needed by repeating pushing MODE buttons.

Note 2: There is no stated order of setting 0% and 100% levels or no limitation of entering values for multiple times within one step of Calibration Mode. Signal level is stored each time the respective UP or DOWN button is pressed.

■I/O RANGE LABEL

■INPUT & OUTPUT RANGING

[Example]

Setting input to 4 Ð 20mA DC and output to 1 Ð 5V DC

1) Run Mode: Confirm that the LD1 green light is blinking.

2) Input Configuration Mode: Press MODE button for longer than 5 seconds until the LD1 red light is ON and the LD2 red light is blinking.

3) 0% Input Ranging: Apply the desired minimum input level (e.g. 4mA) from the simulator and push DOWN button until the LD1 flashes for approx. 2 sec. and then turns OFF. When you release the button, the LD1 is returned to ON.

The flashing LD1 means that the value is stored in the memory. If the LED does not change, the entered level may be inappropriate: too small a span, or out of usable range (same for all steps).

4) 100% Input Ranging: Apply the desired maximum input level (e.g. 20mA) from the simulator and push UP button until the LD1 flashes for approx. 2 sec. and then turns OFF. When you release the button, the LD1 is returned to ON.

5) Output Configuration Mode: Push MODE button and confirm that the LD3 red light instead of LD2 is blinking.

6) 0% Output Ranging: Increase or decrease the simulated input until the meter shows the desired minimum output level (e.g. 1V). Push DOWN button until the LD1 flashes for approx. 2 sec. and then turns OFF. When you release the button, the LD1 is returned to ON.

7) 100% Output Ranging: Increase or decrease the simulated input until the meter shows the desired maximum output level (e.g. 5V). Push UP button until the LD1 flashes for approx. 2 sec. and then turns OFF. When you release the button, the LD1 is returned to ON.

8) Run Mode: Programming complete, push MODE button and confirm that only the LD1 green light is blinking.

■ZERO & SPAN ADJUSTMENTS

After the transmitter is installed and operational, fine zero and span tuning can be performed as explained below. Both zero and span are adjustable within ±15%.

1)Run Mode: Confirm that the LD1 green light is blinking.

2)Fine Zero Calibration Mode: Press MODE button for 1 or 2 seconds until the LD1 red light is ON and the LD2 green light is blinking.

3)Use UP (increase) and DOWN (decrease) buttons to adjust the output to 0%.

Blank I/O range labels are included in the product pack- age. Write in the configured ranges and put the label on the side above the specification label as shown below.

INPUT

OUTPUT

I/O Range Label (included in the product package)

P. 5 / 6 EM-2664 Rev.2