Warning – Myron L 729II User Manual

Page 15

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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!

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