Myron L 729II - Manual (Page 15)

D. SENSOR INSERTION/IMMERSION MOUNTING
The Sensor’s mounting orientation must provide a continuous
and adequate circulation flow to prevent the trapping of air
bubbles within the Sensor’s electrode area (CS51 shown in
figure II.D.1). Failure to do so will result in conditions that will
prevent the Sensor from functioning properly.
1. INSERTION MODE (in-line installation)
Use approved sealant, i.e. Teflon tape as required.
1. Verify that the Sensor’s Fitting assembly is properly
assembled as shown in figure II.D.1.
2. Insert the Sensor Fitting assembly into the “T” fitting
with electrode aligned as shown in figure II.D.1. and
tightly secure.
2. IMMERSION OR DIP SENSOR ASSEMBLY
Use approved sealant, i.e. Teflon tape as required.
1. Verify that the Sensor’s Fitting assembly is properly
assembled as shown in figure II.D.2.
2. Insert and pull the Sensor’s cable through the
extension tube and then tightly attach extension tube to
Sensor assembly as shown in figure II.D.2.
E. ELECTRICAL INSTALLATION
The electrical installation procedures provided in this manual are
common to all Conductivity & Resistivity Monitor/controllers. See
figure II.B.1. for the hole dimensions of the enclosure’s cable
access holes. Unless otherwise instructed, refer to figure II.E.1.
for the 750 Series II Monitor’s terminal block connector wiring
designations.
NOTE: After removing an enclosure’s access hole cutout, it is
suggested that the user mount a watertight restraint fixture prior
to installing a cable.
A device to disconnect the Model 750II from the power
supply is required. It is recommended that this switch or
circuit breaker be labeled as the disconnection device for
the Model 750II.
1. MAIN INPUT POWER INSTALLATION
WARNING: All AC line powered Monitor/controllers are
factory set for 115 VAC. Before starting, ensure the input
power “115/230” selection is correct for your requirements.
Failure to do so is beyond the responsibility of the Myron L
Company. See section II.E.2. below and figure II.E.1.
NOTE: Some models may have either a 24 VAC or a 24 VDC
input power requirement - check labels carefully.
For OEM models skip to step #7.
1. Verify that the main AC power source is turned “OFF”
or disconnected.
2. Using a standard slot screwdriver remove the four (4)
screws on the front panel.
3. Carefully wiggle the front panel to loosen and pull
gently toward you. Do not pull more than about
8 inches/20CM or you could damage the wiring
harness.
INSERTION MODE ASSEMBLY
Figure II.D.1
IMMERSION OR DIP SENSOR ASSEMBLY
Figure II.D.2
ELECTRICAL CONNECT DIAGRAM
Figure II.E.1
SECURING NUT SS
WASHER
PLASTIC
WASHER
O-RING
THREADED FITTING
3/4" FNPT
"T" FITTING
CABLE
OUT
IN
FLANGE
EXTENSION TUBE
CABLE
COUPLING
3/4" NPT SENSOR TIP
THREADED FITTING
3/4" FNPT
FLANGE
O-RING
PLASTIC
WASHER
SECURING NUT
FUSE
MAIN
INPUT
POWER
GND-GRN
NEU-WHT/-DC
LINE-BLK/+DC
115/230
SWITCH
{
}
{
}
CHASSIS GROUND FOR
OEM INSTALLATIONS
ONLY
SENSOR
L N
0-10VDC
OUTPUT
NEU
GRN
RED
WHT
BLK
(+)
(-)
ALARM
CONTROL
RELAY
COM
NO
NC
11
!
WARNING!