Thermo Scientific ALPHA COND 500 - REV 4 User manual

Alpha COND 500
Controller/Transmitter
uS / mS / ºC

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Preface
This manual serves to explain the use of the Alpha COND 500 transmitter. It
functions in two ways, firstly as a step by step guide to help you to operate the
transmitter. Secondly, it serves as a handy reference guide. It is written to cover as
many anticipated applications of the transmitter as possible. If there are doubts in
the use of the transmitter, please do not hesitate to contact the nearest Authorized
Distributor.
Thermo Scientific will not accept any responsibility for damage or malfunction to the
transmitter caused by improper use of the instrument.
The information presented in this manual is subject to change without notice as
improvements are made, and does not represent a commitment on the part of
Thermo Scientific.
Copyright © 2009
All rights reserved

TABLE OF CONTENTS
1INTRODUCTION...................................................................................1
2PREPARATION ....................................................................................2
2.1 POWER SUPPLY REQUIREMENTS (SL2 POSITION)...........................................3
2.2 CONNECTING THE ELECTRODE AND TEMPERATURE SENSOR (SL1 POSITION)....3
3INSTALLATION ....................................................................................5
3.1 MECHANICAL DIMENSIONS............................................................................5
3.2 WALL MOUNT..............................................................................................5
3.3 PANEL MOUNT ............................................................................................6
4DISPLAY AND KEYPAD FUNCTIONS................................................7
4.1 DISPLAY .....................................................................................................7
4.2 KEYPAD......................................................................................................8
5CALIBRATION......................................................................................9
5.1 IMPORTANT INFORMATION ON TRANSMITTER CALIBRATION...............................9
5.2 TEMPERATURE CALIBRATION ......................................................................11
5.3 CONDUCTIVITY CALIBRATION ......................................................................12
6ADVANCED SETUP FUNCTIONS.....................................................13
6.1 RANGE AND ZOOMING SELECTION SETTING..................................................13
6.2 TEMPERATURE COMPENSATION SETTING.....................................................15
6.3 HOLD CURRENT SETTING..........................................................................18
6.4 OUT-OF-RANGE CURRENT SETTING ............................................................18
6.5 TEMPERATURE COEFFICIENT AND NORMALIZATION TEMPERATURE SETTING....19
6.6 CELL CONSTANT SETTING ..........................................................................20
6.7 LINE RESISTANCE SETTING .........................................................................20
6.8 VIEWING CALIBRATION POINT......................................................................21
6.9 VIEWING THE ELECTRODE DATA..................................................................21
6.10 RESET FUNCTION ......................................................................................22
7FACTORY DEFAULT SETTINGS ......................................................23
8TROUBLE SHOOTING GUIDE...........................................................24
9SPECIFICATIONS ..............................................................................25
10 ACCESSORIES ..................................................................................26
11 WARRANTY........................................................................................27
12 RETURN OF ITEMS............................................................................27

1 INTRODUCTION
Thank you for selecting an Alpha COND 500 2-Wire Transmitter. This isolated
output 4-20mA transmitter is a sturdy microprocessor-based instrument that
measures conductivity and temperature and transmits its output via the 2-wire
power supply loop.
This transmitter has many user-friendly features – all of which are completely
accessible through the water-resistant membrane keypad. Your transmitter includes
an instruction manual and a warranty card.
Please read this manual thoroughly before operating your transmitter.
2-wire Conductivity Transmitter
lpha COND
MEAS
°C
READY
500
.
A
TC
1413
μ S
2-wire Conductivity Transmitter
MEAS
°C
READY
.
A
TC
1413
μ S
A

2 PREPARATION
Remove screws from the four corners at the back of the Transmitter, and remove
back cover.
Connectors should be exposed as follows:
NC
NC
NC
Figure 1 – Connection Guide
All wiring is done on 2 detachable connectors: –
1. 9-pin connector (located on SL1 position) for Conductivity electrode and
temperature sensor; &
2. 3-pin connector (located on SL2 position) for power supply.
Using a suitable screwdriver, loosen screws from top of connector.
When inserting the wires, always hold connector with top screws facing up.

2.1 Power Supply Requirements (SL2 Position)
The Alpha COND 500 transmitter requires a 12 to 24V DC power supply. Other
Transmitters and/or a chart recorder may be connected in the loop.
1. Insert positive loop wire from power supply to pin 1, tighten screw.
2. Insert negative loop wire to pin 2, tighten screw. This wire may be linked to
a chart recorder or to negative terminal of power supply.
Alpha
COND 500
2.2 Connecting the Electrode and Temperature Sensor (SL1
Position)
2.2.1 To connect the Conductivity electrode:
The Alpha COND 500 transmitter accepts any industrial electrodes for conductivity
measurements and they are usually offered with bare wires.
1. Insert the electrode’s conductivity wire Low into pin 3 of SL1 connector.
Tighten the screw.
2. Insert the electrode’s conductivity wire High into pin 4 of SL1 connector.
Tighten the screw.
Conductivity wire High
Conductivity wire Low
Shield wire
Pt 100 Input wire
Pt 100 Sense wire
Pt 100 Return wire
To Electrode
Power
Supply
1
2
Chart
Recorder

2.2.2 To connect ATC temperature sensor:
For Automatic Temperature Compensated (ATC) Conductivity readings, an in-built
temperature sensor is usually integrated in the industrial conductivity electrodes.
Otherwise, a separate 100ΩPt RTD temperature probe can be used.
3 wire temperature sensor
1. Insert the Pt100 input wire to pin 5 of SL1 connector. Tighten the screw.
2. Insert the Pt100 sense wire to pin 6 of SL1 connector. Tighten the screw.
3. Insert the Pt100 return wire and the shield wire to pin 7 of SL1 connector.
Tighten the screw.
2 wire temperature sensor
1. Take a small length of wire and short pins 5 and 6 of SL1 connector. Insert
Pt 100 sense wire into pin 6 of SL1 connector and tighten the screws.
2. Insert Pt 100 return wire and the shield wire to pin 7 of SL1 connector.
Tighten the screw.
IMPORTANT: It is necessary to connect the SHIELD wire to the pin 7 as stated
above to eliminate possible oscillation of the conductivity and/or temperature
reading due to electrical noise or interference.
Ensure that no bare wires are exposed and all screws are tightened for proper
contact.

3 INSTALLATION
3.1 Mechanical Dimensions
2-wire Conductivity Transmitter
Alpha COND 500
3.2 Wall Mount

3.3 Panel Mount
1. Prepare panel cut-out of
92.0 mm by 92.0 mm
2. Remove back cover of
transmitter and slide it
through panel cut-out
Panel (side)
3. Atta
sidech lugs to either of transmitter
4. Thread rods through
lugs until transmitter
is held in place against
panel