Myron L 729II - Manual (Page 19)

1. Grasp connector and align wires DOWN on display or
with the small edge of the display as shown in figure
II.E.5.
2. Press connector onto display pins. Ensure pins are
aligned or they may become bent. Wiggle connector
slightly “end to end” if necessary.
F. 0-10 VDC RECORDER OUTPUT
The 0-10 VDC output is designed to give the user the capability of
sending a signal to a remote meter, recorder, PLC or SCADA
system.
1. CONNECTION
1. Place the user supplied interface cable and watertight
cable restraint into the enclosure’s appropriate access
hole. Skip for OEM.
2. Connect the Recorder’s plus (+) and minus (-) terminal
wires to the Recorder output connectors. (See figure
II.F.1)
3. Refer to Section V.C.1.b for the procedures to calibrate
the 0-10 VDC voltage output.
2. VOLTAGE DIVIDER
A voltage divider gives the user the ability to scale or tailor the
output to a particular need or requirement due to the input of
another device, i.e. the output of the Main CB is 0-10V while the
input requirement of a particular recording device is 0-5V.
a. INSTALLATION
Briefly—
Two resistors are installed across the 0-10V output.
The output is recalibrated to required voltage.
Requirements
Select two (2) resistors as listed;
For 0-5V Output both “A & B” are 2K Resistors.
For 0-1V Output “A” is a 9K resistor and “B” is a 1K resistor.
WARNING: BEFORE STARTING, IF MONITOR/
CONTROLLER IS INSTALLED, ENSURE THE POWER
IS OFF. FAILURE TO DO SO COULD CAUSE DAMAGE
TO THE INSTRUMENT, AND COULD BE HARMFUL OR
FATAL TO PERSONNEL. ONLY QUALIFIED
PERSONNEL SHOULD INSTALL ELECTRICAL
EQUIPMENT.
Physical
If the front panel has all ready been removed from the enclosure
skip to #3.
1. Using a standard slot screwdriver remove the
screws on the front panel.
2. Carefully wiggle the front panel to loosen the gasket and
pull gently toward you. Do not pull more than about 8
inches/20CM or you could damage the wiring harness.
3. Turn the front panel around so that the back side is
facing you and set aside for now.
4. Solder two selected resistors together as shown in figure
II.F.1.
5. Attach leads to recording device as shown in figure
II.F.1.
6. Attach resistors to 0-10V Output as shown in figure
II.F.2.
Ensure resistors and leads DO NOT short to each other
or to any part of the CB assembly.
7. Recalibration is required, see Calibration Procedures,
section V.C.
Reassembly
1. Carefully reinstall the front panel, bottom first, ensure no
wires have been pinched.
2. Reinstall the screws and tighten.
3. To operate, turn power ON.
15
0-10V Output
+
-
A
B
+
-
Recording
Device
Figure II.F.1
3S
SENSOR LEADS
0-10VDC
OUTPUT
- +
NEW
OUTPUT
AS
SELECTED
Main CB Assembly
Figure II.F.2
SPAN ZERO
ZERO
DO NOT
ADJUST
BK WT RD GN NU R- R+
PANEL MOUNTED DISPLAY
REAR VIEW
DISPLAY CONNECTION
DISPLAY
HARNESS
DISPLAY
Figure II.E.5
!
CAUTION - READ FOLLOWING CAREFULLY