Myron L 729II User Manual
Page 25
The following instructions describe the steps for converting the
Monitor/controller. Refer to figure III.A.4 for the location of the
SPC(s) on your Monitor/controller. If unnecessary, skip to Set
Point Adjustment.
1. Ensure power is OFF.
2. Locate the SPC jumpers for the alarm to be configured,
see figure III.A.4.
3. Make a note of the current orientation of the SPC
jumpers.
4. Remove both jumpers. This is easily done by hand. Take
care not to crush the jumpers if using pliers.
5. Rotate the jumpers 1/4 turn (90°) and reinstall them on
their posts.
6. Continue with Set Point adjustment.
b. Set Point Adjustment
Set point #1 (LOW) must be adjusted BEFORE adjusting set
point #2 (HIGH).
1. Turn power ON.
2. While depressing the lower “SET POINT” switch, turn the
Set Point #1 control adjustment, figure III.A.4 until the
desired set point value is indicated on the display.
3. Repeat for Set Point #2 by depressing the upper “SET
POINT” switch and adjusting the SP2 on the SC/SCO
Module as shown in figure III.A.4.
4. Turn power OFF.
5. Continue or reinstall the front panel and tightly secure
retaining screws, see REASSEMBLY, page 22.
21
Figure III.A.4
SOLID STATE (24VDC 30mA) Output
PA™ PIEZO ELECTRIC ALARM OR
RA™ REMOTE ALARM OR
CUSTOMER CONNECTION
REMOVE TO
INSTALL
SET POINT #1
CONVERSION
FUSE*
115/
230
SET POINT #2 (high)
ADJUST
SC/SCO
OPTIONAL
SECOND
ALARM/
CONTROL
MODULE
SET POINT #2
CONVERSION
#2 RELAY
LIGHTS &
SWITCH
CONNECTOR
TRANSFORMER
721 726
722 727
723 728
724 729
MYRON L
COMPANY
RUBBER TAPE
(DO NOT
REMOVE)
RELAY #1
}
COM
GROUND
NC
NO
SPC
INC
PA
COM
RELAY #2
}
NO
NC
DIS
ORP ZERO
SOLID STATE (24VDC 30mA) OUTPUT
PA™ PIEZO ELECTRIC ALARM OR
RA™ REMOTE ALARM OR
CUSTOMER CONNECTION
SET POINT #2 HYSTERESIS
RIGHT INCREASING
LEFT DECEASING
3S
INC
SPC
SPAN
ZERO
HYS1
SP1
ZERO
DO NOT
ADJUST
0-10VDC
OUTPUT
SET POINT #1 (low)
ADJUST
SET POINT #1
HYSTERESIS
RIGHT INC
LEFT DEC
7 pH/ZERO mV
PUSH TO TEST
SPAN (GAIN)
PUSH TO TEST
UP
pH
CONFIGURATION
MODULE
}
{
POWER
AC LINE/ +DC
AC NEUTRAL/ -DC
BK WT RD GN NU R- R+
PWR
C GD NC NO CM
CHS
GND
PA
RA
CM
N
O
N
C
pH
}
SP
AN
DEC
RE
MO
VE
T
O
SE
CO
ND
R
EL
AY
IN
ST
AL
L