Myron-l Aquaswitch II User Manual download pdf (Page 22)

G. RE-RANGE YOUR AQUASWITCH II

(Range Module Installation)

1. DESCRIPTION

The AQUASWITCH II Monitor/controllers have been designed

for easy field re-rangeability. The Range Module consists of a 16

pin Header that plugs into a 16 pin socket.

For available ranges, see Range Selection Guide I.G. When

making large range changes in conductivity/TDS, i.e. 1 ppm to 50

ppm, a different sensor may also be required as noted in the

Range Selection Guide. Order Range Module by adding the prefix

“RM” to the range number as in examples below.

Resistivity Range Modules —

RMXX i.e. = RM11 is a 0-20MΩ

Conductivity/TDS Range Modules —

RMXXX i.e. = RM111 is a 0-50µS

2. INSTALLATION

Briefly -

The new Range Module simply replaces the Range Module

presently installed, see figure II.G.1.

Type label may be required if changing from Microsiemens to

PPM.

The Full Scale reading is recalibrated.

CAUTION - READ FOLLOWING CAREFULLY

WARNING: BEFORE STARTING, IF THE

AQUASWITCH 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 OR SERVICE

ELECTRICAL EQUIPMENT.

Physical

NOTE: When opening instrument, remove front cover with care;

a ribbon cable connects the front panel and main board. If the

front panel has already been removed from the enclosure skip to

#4.

1. Using a standard slot screwdriver remove the two (2)

screws on the front panel.

2. Carefully wiggle the front panel 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.

4. Locate and remove existing Range Module from MAIN

Circuit Board, as shown in figure II.G.1. It is not easy to

remove, it was designed to stay in place under adverse

conditions.

5. With the pointer up, carefully align the new Range Module

to the socket on the MAIN Circuit Board as shown in

figure II.G.1.

6. Press firmly into place.

7. Recalibrate, see CALIBRATION PROCEDURES, section

V.D.

Figure II.G.1

MAIN MONITOR/CONTROLLER CIRCUIT BOARD

CHS

GND

-11

0-20mΩ

}

HYS1SP1

FUSE*

115/

230

DIS

CAL

PA RA

INC

DEC

SPC

TRANSFORMER

RANGE

MODULE

751 756

752 757

753 758

754 759

MYRON L

COMPANY

FSSW

FULL SCALE

PUSH TO TEST

0-10VDC

OUTPUT

POINTER

BK WT RD GN NU R- R+

PWR C GD NC NO CM

REMOVE TO

INSTALL

SECOND

RELAY

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Myron-l Aquaswitch II User Manual Page 22

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