Thermomax SM DUE User Manual

THERMOMAX

SM DUE

TWO CHANNEL DATALOGGER AND ALARM

ENGLISH

www.Thermomax-Group.com

CONTENTS

SECTION 1 - INTRODUCTION .............................................................................. 2

SECTION 2 - INSTALLATION ................................................................................ 3

2.1 - SM DUE Unit ......................…….................................................... 4

2.2 - Sensors .......................................................................................... 4

2.3 - Alarm Relay .................................................................................... 5

2.4 - Power Connections and Wiring Diagram ................................ 5

2.5 - Battery ............................................................................................. 5

SECTION 3 - OPERATION ................................................................................... 6

3.1 - DESCRIPTION ............................................................................. 6

3.2 - MAIN SCREENS:

3.2.1 MAIN SCREEN 1: Channel Temperature Display ...... 8

3.2.2 MAIN SCREEN 2: Current Day Plot Screen ............…. 9

3.3 - SET SCREENS:

3.3.1 SET SCREEN 1: Clock / Calendar …............................. 10

3.3.2 SET SCREEN 2: System Pre-sets 1............................... 11

3.3.3 SET SCREEN 3: System Pre-sets 2 …………....……. 13

3.4 - SYSTEM DIAGNOSTICS:

3.4.1 DATABANK DIAGNOSTICS SCREEN ........................... 14

3.4.2 CHANNEL DIAGNOSTICS SCREEN ............................ 15

3.4.3 CALIBRATION TRIMMING SCREEN ............................. 16

3.5 - CHANNEL SCREENS: /

3.5.1 CHANNEL DISPLAY SCREENS .................................... 17

3.5.2 CHANNEL SET SCREENS ............................................ 18

3.6 - PLOT HISTORY :

3.6.1 Data log of previous days ………………………............ 19

3.7 - DATA TRANSFER: ................................................................. 20

3.7.1 Transferring Data Using the Masterlink Software ..... 20

3.7.2 Transferring Data to the Masterlink Hardware ........... 20

3.7.3 Printing Data to the Thermomax Serial Printer ............ 22

3.8 - DATA TRANSFER - PANELMOUNT UNITS ONLY ........................ 23

SECTION 4 - FAULT FINDING .........................................................................…. 27

SECTION 5 - SPECIFICATIONS .......................................................................… 28

KEYPAD LOCK …………………………………………………………......……. 29

SM DUE PANELMOUNT ……………………………………........……………… 30

1

2

SECTION 1 INTRODUCTION

The SM DUE microprocessor-based datalogger uses the novel approach of a
paperless logging and filing system, which allows the data of any day in its history to
be read and examined with a few key presses.

The large graphics LCD display communicates the information to the user with
clarity, making programming and setting up friendly and uncomplicated, without
compromising its sophistication and digital accuracy.

SUMMARY OF FEATURES

DATALOGGER

• Paperless datalogger with automatic filing by date

• 50-year clock / calendar for datalogger filing.

• The temperature from each Channel is sampled every 5 minutes and stored

to an internal databank.

• ‘Percentage of internal databank used’ indication in bargraph and digital form.

• Once the databank is 100% full, the first eighth of the stored data will

automatically be replaced. (For the capacity of the databank, see Section 5).

• Power Supply options of either Mains or DC.

• Contents of internal databank can be transferred directly to the PC using the

MASTERLINK Software or via a MASTERLINK Hardware module to a PC at
a remote site.

ALARM

• 2-Stage high and low level alarms with mute and reset facilities,

• Stage 1 temperature threshold with trigger delay.

• Stage 2 limit temperature with immediate trigger.

• Diagnostics screen revealing system parameters.

• Alarm history record for low alarm, high alarm and power fail.

• Battery back-up for power-fail operation.

Note: The information supplied in this manual is for guidance only - no part of this
may be used for any agreement, whether express or implied, or to form any contract.

SECTION 2 INSTALLATION

Note: This installation procedure is for guidance only, and its suitability should be
verified by the installer.

SAFETY PRECAUTIONS

1. Before attempting to install and operate the unit, read this instruction manual

carefully.

2. Installation and any maintenance required should only be carried out by

suitably qualified personnel.

3. It is recommended that the unit be connected to the mains supply via a

suitably rated isolating switch.

4. WARNING: When the unit is connected to the mains supply and the

cover is opened, circuits at mains voltage will be exposed. Therefore

when installing the unit, ensure all required connections (including battery
connection, if included), are made and covers replaced before turning on the
mains supply. Ensure that all the connections made are secure. If any
maintenance work is required e.g. installing a new battery, ensure that the
unit is isolated from the mains supply before removing the cover. Never

leave the unit unattended if the cover has been removed and the mains
supply is connected.

5. Do not exceed unit ratings as shown on the ratings label.

6. It is advisable to route mains cables away from low voltage or sensor cables.

3

2.1 SM DUE UNIT

NOTE: For viewing comfort, the SM DUE unit should be positioned at eye
level. It is always good practice to keep electronic equipment away from
cold, heat and electrical plant, as extremes of temperature may reduce the
lifetime of the device, and heavy electrical loads, switches, relays or
contactors too close to the device may cause electrical and electro-magnetic
interference when switched on or off.

2.1.1 Knock out the entries into the moulding to be used for connection, either
behind or under the moulding, whichever is suitable for the particular
installation.

2 .2.2 Fasten the screw corresponding to the top centre lug on the back of the SM

DUE moulding, into the wall or panel on which the unit is to be mounted.
Leave a gap of approximately 3mm between the screw head and the wall.
Position the moulding and slot in the lug over the screw.

2.2.3 Level the SM DUE moulding and, if using rear entry, mark the entry holes in
the panel behind the appropriate knock-out entries, as well as the two lower
mounting holes.
Remove the moulding, drill the necessary holes in the panel, assemble any
grommets or conduit adapters if used, replace the moulding and fasten using
the two lower screws.

2.2 SENSORS

Temperature sensors, SXTM PT100 are used with all Thermomax units. They
are available in lengths from 5m to 100m, as are the sensor extenders, and
all come with a 4-way telephone plug. Each sensor comes with an original
Thermomax calibration certificate. The standard sensor can measure
temperatures from +50°C / -50°C.
Note: Using suitable 3-core or 4-core cable, the sensor can be extended,
according to the diagram shown below.
Note: In doing this, Thermomax calibration is removed.
The standard sensors PT100 are not suitable for use in acidic or alkaline
environments and should not be used in fluids.

Please note however, that as with all PT100 sensor applications, a good
connection is vital. It is therefore recommended that wherever there is any
doubt, a factory- extended sensor or sensor extender should be used.

4

2.3 ALARM RELAY

NOTE: The alarm relay is a 3 contact changeover arrangement that is
isolated (volt-free). This relay is normally energised, and switches off when
the alarm is triggered, or in the case of power failure. It may be used to
trigger an external bell, warning lamp, or digital communicator (telephone
dialler).
If an external device is used connect the alarm as appropriate, according to
the diagram in the next section.

2.4 POWER CONNECTIONS AND WIRING DIAGRAM

NOTE: This device should be properly earthed. Flexible wires simplify
connection to the terminals. All connections should be secure and adequately
tightened. It is good practice to keep mains cables away from sensor cables
and other low voltage signal cables.

Connect the supply to the unit, as per diagram below, using the appropriate
input voltage according to the application.

Alarm
Relay

L E N + -

Connect as appropriate
to application

Mains

Input

220 - 240V AC

DC

Input

20 - 28V DC

Sensors

CH1 CH2

SWITCH OPEN = DOOR OPEN
SWITCH CLOSED = DOOR CLOSED

Doo

r

max

5A

PC

2.5 BATTERY

The battery supplied is a 9V PP3 nickel metal hydride rechargeable battery
and is attached to the lid of the terminal compartment, but not plugged in.
This should be plugged in after installation. This battery is not essential for
the system operation, but is used in the case of power failure, thereby
continuing to log the two input temperatures for 6 - 7 hours, and maintaining
the system clock.
If the power cut takes longer and the battery is discharged, the clock must be
set when the power supply is re-established. The system parameters remain
intact.
It is recommended that the battery is changed every 12 months, in order to
maintain good power failure operation. When replacing, ensure that the type
of battery used is as specified - only a rechargeable PP3 battery should be
used directly, as the battery is charged from the unit.

5

6

SECTION 3 SM DUE OPERATION

In order to fully understand the operation of the SM DUE, this section should
be read carefully.

3.1 DESCRIPTION

SM DUE

°C

MIN -6.0 MAX -5.5

1 GRAPHICS LCD DISPLAY

Displays all the information. The contrast is adjustable to suit the user.
(See 3.2.1 Main Screen 1).

2 FUNCTION KEYS

There are six function keys on the SM DUE datalogger:

- Main Screen 1 - Channel 2 Display Screen

- Main Screen 2 - Channel 2 Set Screen

- Set Screen 1 - Plot History Screen

- Set Screen 2

- Channel 1 Display - Data Transfer Key
Screen

- Channel 1 Set Screen

3 SELECT KEYS

Within each function, there are some parameters that can be selected for
setting or displaying purposes. The keys allow the required

parameter to be chosen, without changing any of its properties.

5

4

3

2

1

4 SET KEYS

The and keys are used to set the value of any selected parameter, by
increasing and decreasing the value respectively. In most of the functions,

described later in the manual, the and keys have an auto-repeat
facility: press and hold the key in order to advance quickly.

Note: The and keys are the only keys which can alter the value of a
selected parameter. Other keys may be pressed to view or select these
parameters without effecting any change in the system.

5 INDICATORS

The System Alarm can be triggered by the high temperature alarm, low
temperature alarm, or by a sensor fault.

7

DATA TRANSFER IN PROGRESS

SYSTEM ALARM

8

3.2 MAIN SCREENS

3.2.1 MAIN SCREEN 1: CHANNEL TEMPERATURE DISPLAY

SM DUE

1 MAIN SCREEN function selector.

2 Two channel digital temperature display, viewed in either °C or °F.

3 High and Low Alarm Limits for each channel plus date of last alarm.

4 Maximum and minimum daily temperatures for each channel.

Note: The display contrast may be adjusted in this screen. Press to
increase and to decrease the contrast. To adjust quickly, press and hold

for auto-repeat.

2

3

5

14

3.2.2 MAIN SCREEN 2: CURRENT DAY PLOT SCREEN

SM DUE

CHAN 1

1 MAIN SCREEN function selector

Pressing this key a second time displays the plot of the temperatures logged
for the current day. When this function has been selected, the current day
plot screen for either of the channels may be displayed by pressing the

appropriate channel function selector key: or .

2 Time of Day: This is the horizontal axis scale, and represents time. The

required twelve-hour period is selected using the keys.

3 Current Time-Bar: The time-bar indicates the current time of day, and

therefore the graph following this time bar will be blank. Samples from earlier
in the day may be examined by pressing the key to move the time-bar to

the left. The status of the current time bar is detailed at the bottom of the
screenas per 4-6 below.

4 Plot Time: This displays in digital form, the time indicated by the time-bar.

(The time is displayed in 5-minute sample intervals).

5 Plot Date: This shows the date of the currently displayed graph.
6 Time-Bar Temperature: This displays the logged temperature at the

time indicated by the time-bar. (The time / temperature is displayed in 5
minute sample intervals).

7 Alarm Log: Alarm indication to reveal the incidence of an alarm, the

time it occurred and its duration.

8 Unique electronic serial number of SM DUE.
9 ‘Other Channel’ Range: Display of max. and min. temperatures recorded.
10 This area of the display shows any occurrence of a cold room door

opening.
Note: The recorded temperature data is displayed graphically with a 10

minute sample interval.

9

1

8

9

65

4

7

3

2

10

10

3.3 SET SCREENS

3.3.1 SET SCREEN 1: CLOCK/CALENDAR

SM DUE

1 SET SCREEN function selector

The datalogging system uses the calendar to file the logged data.

2 Selection indicator

The highlighted parameter is adjusted by pressing the or key..
(The selections are: ‘year’, ‘month’, ‘day’, ‘↑’, ‘hour’ and ‘minutes’.)
The ‘↑’ indicates that the day on the calendar above is being set.
The clock is in 24-hour format.

To advance quickly, press and hold the or key for auto repeat.

3 Calendar

This is the calendar of the month selected, with day of the week indication.

SETTING THE DATE AND TIME:

Step 1: Use the keys to set the current ‘Year’.

Step 2: Use the key to move to the ‘Month’ option and then use the

keys to set the current month.

Step 3: Repeat step 2 to set the current ‘date’ and ‘time’ (‘minutes’

and ‘hours’) in turn.

1

3

2

11

3.3.2 SET SCREEN 2: SYSTEM PRESETS

SM DUE

1 SET SCREEN function selector

Pressing this key a second time reveals Set Screen 2.

2 Alarm Mute

To mute the SM DUE’s internal audible alarm, press the key when the
MUTE window is selected. When the alarm system is reset, either manually
or by the temperatures dropping within pre-set limits, the alarm mute will be
cancelled automatically.

3 Alarm Reset

Any current activities, delays or counters are reset by pressing the key
when the RESET window is selected.

4 Alarm Relay Status

The output status of the alarm relay may be either viewed or altered by
pressing the or key when the RELAY window is selected.

0 = Relay Manually disabled (ALARM ON)

AUTO = For normal operation:

1 = Relay Manually activated (ALARM OFF)

5 Keypad Lock

Refer to page 26 of this manual.

1

7

6

3

2

5

4

10

9

8

12

6 Piezo and Indicator test

By pressing the key when the TEST window is selected, the SM DUE’ss
internal audible alarm will ‘sound’ and all indicators will illuminate.
This allows the user to ensure both are functional.

7 Door Switch Selection.

The SM DUE provides the option to connect a door switch for monitoring
purposes, the status of the door is displayed and logged in graphical form
(see section 3.2.2). This option may be enabled or disabled by pressing the

or key respectively. The diagram in section 2.4 shows how to connect

a door switch.

8 Temperature Scale.

The scale used by the system to communicate the temperature information
may be selected here. Press for °C and for °F..

9 Diagnostics.

By pressing the key when the DIAG window is selected, the SM DUE
DIAGNOSTICS screen is activated. (see next section 3.4).

10 Language Selection

The language used by the system to communicate the information may be
selected here. Choose the and keys to make your English, French or

German Language selection.

3.3.3 SET SCREEN 3: SYSTEM PRESETS 2

SM DUE

1 SET SCREEN function selector

Pressing this key a third time reveals Set Screen 3.

2 Alarm Mute Period for Channel 1 (from 0 to 95 minutes). If any key is

pressed during an Alarm situation for this channel, the buzzer will be muted

(silenced) for this period.
3 Alarm Mute Period for Channel 2 (from 0 to 95 minutes). Same as above.
4 Channel Select for Channel 1. Each sensor input can be “switched” on or off

by pressing the or keys for 5 seconds respectively. When the sensor

input is switched “ON”, the unit will operate in normal mode and the actual

sensor temperature will be monitored and logged to the databank every 5

minutes. If the sensor input is switched “OFF”, the unit will display 0°C

continuously. This value will also be logged to the databank. Hence it is

therefore only necessary to connect sensors to the required number of inputs.

NOTE:

If a channel is switched off, the alarm parameters will automatically revert

back to the default factory settings to prevent an alarm occurrence. These

parameters cannot be changed until the sensor input is switched on again.
5 Channel Select for Channel 2.

13

1

4

2

5

3

3.4 SYSTEM DIAGNOSTICS

3.4.1 DATABANK DIAGNOSTICS SCREEN

SM DUE

1 This is the unique electronic signature of the SM DUE.
2 The DATABANK window shows the capacity of the internal databank. There

are two SM DUE options available:
(a) Recording frequency 5 minutes – Databank capacity 570 days

(approx. 1 ½ years - factory default)

(b) Recording frequency 10 minutes – Databank capacity 1128 days

(approx. 3 years)

3 The DAYS LEFT window shows the total number of days, and also the

total percentage of the databank, which have not yet been ‘used’.

4 The ALRM TOTL window shows the total number of alarm incidences

which have occurred in the current year.

5 The LAST ALRM window shows the last date on which an alarm condition

occurred.

6 The TRANSF ON window shows the date on which the contents of the

internal databank need to be transferred.

7 The POWER FL window shows the last date on which the power failed.

During a power fail situation this window will display the duration, in
minutes, of the power failure.

8 Diagnostics Screen Selection.

Use the keys to move between one of four diagnostic screens:

- DBM: Databank Diagnostics Screen (Ref. 3.4.1 above)

- CH1: Channel 1 Diagnostics Screen (Ref. 3.4.2)

- CH2: Channel 2 Diagnostics Screen (Ref. 3.4.2)

- CAL: Calibration Trimming Screen (Ref. 3.4.3)

2

3

4

5

6

7

8

14

1

15

3.4.2 CHANNEL DIAGNOSTICS SCREEN

SM DUE

1 The CHANNEL window shows the number of the currently selected

channel.

2 The INPUT TYPE window shows which type of sensor is being used.

(PT100 in this case).

3 The CALIB DATA window shows calibration values, for factory use only,

and the current temperature reading.

4 The LAST CALIB window shows the date when the SM DUE was

calibrated, (in this case 5 JAN 99).

5 The AL. HIGH window shows the date when the last high alarm condition

occurred for this channel.

6 The AL LOW window shows the date when the last low alarm condition

occurred for this channel.

1

2

3

4

5

6

16

3.4.3 CALIBRATION TRIMMING SCREEN

Calibration trimming allows qualified personnel to adjust the SM DUE’s
calibration by ± 2°C.

Note: A known reference temperature should be used.

SM DUE

CALIBRATION

PLEASE REFER TO MANUAL

To enter the CALIBRATION TRIMMING Screen, press and hold the key
for 5 seconds.

SM DUE

-11° -10°

CHAN 1

0

0

CHAN 2

Use the keys to move to the channel that requires calibration
trimming. Then use the or keys to adjust the current temperature

reading.

17

3.5 CHANNEL SCREENS

3.5.1 CHANNEL DISPLAY SCREENS

SM DUE

DB

66%

DOOR OPEN

°C

MIN -6.0 MAX -5.5

1 CHANNEL 1 function selector: displays the information for channel 1.
2 CHANNEL 2 function selector: displays the information for channel 2.
3 Clock display: 24-hour format with day of week abbreviation.
4 Temperature bargraph: High and low alarm limits are shown as shaded

areas. The two horizontal ‘lines’ represent the maximum and minimum, high

and low temperature alarms respectively.
5 Digital display of Channel temperature, with minimum / maximum indication.

The minimum and maximum values are daily values, and are reset at

midnight.
6 Internal databank indicator: This indicates the percentage ‘used’, in both

bargraph and digital form.
7 When the door switch facility is activated (see 3.3.2), this area will show the

status of the door as ‘door open’ or ‘door closed’. Note that if there is no

switch connected, the unit will display ‘door open’.

Note: The display contrast may also be adjusted from any of these screens

by pressing the or keys.

2

1

3

5

4

6

7

18

3.5.2 CHANNEL SET SCREENS

SM DUE

1 Channel 1 function selector

2 Channel 2 function selector

Pressing either of these keys a second time will display the “Channel Set
Screen” for the appropriate channel.

3 Bargraph Display Scale

By pressing the or key, the bargraph display scale may be adjusted to
show the temperature range best suited to the particular installation. This
scale is also used for the “Plot display” (Ref. 3.2.2 Current Day Plot and 3.6
Plot History).

4 High Alarm Stage 1 temperature (-50°C to +50°C)

The Stage 1 alarm is a time/temperature-related alarm. If the maximum
threshold is exceeded, a timer is initiated, and no further action is taken at
this time.

5 High Alarm Stage 1 Delay (1 - 99 min.)

After the maximum threshold has been exceeded (Ref. 4 above), the alarm
will not be triggered until the timer exceeds the time delay set here.
If the temperature drops below the threshold before the expiry of this delay,
the timer is reset. If following this the temperature rises above the threshold
again, the timer restarts from zero.

6 High Alarm Limit Stage 2 temperature (-50°C to +50°C)

If at any time this limit is exceeded the time delays will be overridden and the
alarm will trigger immediately.

7 Low Alarm

All the functions described in 4-6 above also apply to the low alarm.

1

2

65

4

3

7

19

3.6 PLOT HISTORY

3.6.1 DATA LOG OF PREVIOUS DAYS

SM DUE

AUG

1 Plot History function selector

When this key is pressed, the directory of the contents of the internal

databank is displayed, as above.
2 The highlighted months on this screen are the months for which the

databank contains data.

3 Current Selection

To view the plot of a particular day, select the required month from the

calendar using the keys, followed by the key to accept the

selection. A second screen appears for the selection of the day, after which

the logged data for the required day is displayed for inspection.

(Ref. Section 3.2.2 MAIN SCREEN 2: Current Day Plot Screen)

When the required plot is displayed, the plot screen for either of the channels

may be viewed by pressing the appropriate channel function key: or

.

To exit the Plot History function, press the main key .

1

2

3

20

3.7 DATA TRANSFER

The SM DUE is supplied with an internal reusable 1 ½ year databank. The
contents of this databank may be transferred directly to the PC using the
MASTERLINK Software or, alternatively, the MASTERLINK Hardware may be
used as an intermediate storage device to transfer data to a PC at a remote
location.

3.7.1 Transferring Data Using the Masterlink software

NOTE: Before data can be transferred to the PC, the software must be set
up on the PC, as per the MASTERLINK Software Manual.

(a) Plug the 8 Way SX plug of the ‘PC Cable Assembly’ into the

SERIAL LINK of the SM DUE.

(b) Then plug the 9 Way ‘female D type’ connector into any free serial

port in the PC.

NOTE: For Panelmount units, read section 3.8 before attempting to
download or print data.

3.7.2 Transferring Data to the Masterlink Hardware
(a) Connect the ‘MASTERLINK Cable Assembly’, from the SERIAL LINK SX

socket of the SM DUE to the MASTERLINK Hardware.

(b) Press the key to reveal the following screen:

SM DUE

DATA TRANSFER

MASTERLINK
PRINTER
CANCEL

(c) To download data to the Masterlink Hardware unit, (Part No. C0321), press

the key and the following screen will appear:

21

SM DUE

TRANSFER 0001 DAYS

INCREASE

DECREASE

CONFIRM

(MAX: 61 DAYS)

(d) The user can now choose any number of days, (starting from the current

day), to transfer to the Masterlink Hardware – from 1 day up to the total

number of days stored in the internal databank of the Thermomax unit. In

this example, there are 61 days of data stored in the Databank.

(e) To increase or decrease the number of days to download, press the or

key and then press the key to confirm this. The maximum number of

days the user will be able to download, corresponds to the number of days

data stored in the databank.

22

3.7.3 Printing Data to the Thermomax Serial Printer

(a) Press the key to reveal the following screen:

SM DUE

DATA TRANSFER

MASTERLINK
PRINTER
CANCEL

(b) To print data directly to the serial printer, (Part No. A6747), press the key and

the following screen will appear:

SM DUE

PRINT 0002 DAYS

(MAX: 91 DAYS)

INCREASE
DECREASE
CONFIRM

(c) The user can now choose any number of days, (starting from the current

day), to print directly to the Thermomax serial Printer – from 1 day up to the
total number of days stored in the internal databank of the Thermomax unit.
In this example, there are 61 days of data stored in the Databank.

(d) To increase or decrease the number of days to print, press the or key

and then press the key to confirm this.

3.8 DATA TRANSFER - PANELMOUNT UNITS ONLY

The following functions / features have been added to the new Panelmount units.
Mode 1 In Standard Mode the serial socket can be used for the following

functions:

• Direct connection to PC

• Direct connection to Masterlink Hardware

• Direct connection to Thermomax Serial Printer

The unit is despatched from Thermomax in this mode.

Thermomax Serial

Printer - A6747

Masterlink Hardware
Unit - C0321

PC

Mode 2 This mode is used to network up to 32 units to one PC, (see

illustration below).

SM QUATTRO

PANELMOUNT - C0445

SM DUE

PANELMOUNT - C0447

NETWORK CABLE

1m - A7004
10m - A7426
20m - A7427
50m - A7428

100m - A7429

200m - A7431

NETWORK
TERMINATOR - A7256

NETWORK
TERMINATOR - A7256

MASTERLINK SOFTWARE - C0322

(5m CABLE ASSEMBLY + DISK)

MASTERLINK EXTENSION KIT : 10m - A7030

OR

MASTERLINK EXTENSION KIT : 20m - A7378

OR

MASTERLINK EXTENSION KIT : 40m - A7342

OR

MASTERLINK EXTENSION KIT : 60m - A7100

NETWORK

SOCKETS

SMX 100

PANELMOUNT - C0444

23

MODE 1 – STANDARD MODE (DISABLING NETWORK MODE)

If the network is enabled and the user tries to download data to the Masterlink
Hardware or print directly to the Thermomax Serial Printer, the following screen will
appear.

SM DUE

DATA TRANSFER

FUNCTION

NOT AVAILABLE

PLEASE REFER TO MANUAL

In order to download data to the Masterlink Hardware unit or print directly to a
Thermomax Serial Printer, the network must be disabled.

To disable network, press the key twice to reveal the following screen:

SM DUE

Select the window by using the key and press the key to show the
following screen:

24

SM DUE

With this screen displayed, press and hold the key for approximately 10
seconds. The following screen will appear:

SM DUE

To disable the network press the key. (When the key is pressed, the SM Due
will switch off and back on again).

If you do not wish to disable the network, press the key..

25

MODE 2 – NETWORK MODE (SELECTING NETWORK MODE)

To select the network mode, press the key twice to reveal the following
screen:

SM DUE

Select the window by using the key and press the key to show the
following screen:

SM DUE

With this screen displayed, press and hold the key for approximately 10
seconds. The following screen will appear:

26

SM DUE

To enable the network press the key. (When the key is pressed, the SM Due
will switch off and back on again).

If you do not wish to enable the network, press the key..

SECTION 4 FAULT FINDING

Problem: Nothing happens when the unit is powered-up.
Cause / Remedy: One of the fuses could be blown - check and replace if

necessary (refer to specifications for values). If the fuses blow
again, contact the agent where the unit was purchased.

Problem: The temperature display is fluctuating.
Cause / Remedy: One of the sensor connections may be loose, or a sensor

cable may be too close to a mains cable. Tighten connections
and re-route cables if necessary.

Problem: Unable to set any of the parameters: Keypad will not operate.
Cause / Remedy: The Keypad Lock is on - See ‘Keypad Lock’.

Problem: The display screen is too dark or too faint.
Cause / Remedy: Adjust the display contrast to suit - See ‘Display Contrast’ in

the MAIN SCREEN 1 section.

Problem: The System Alarm light is flashing once every 3 seconds.
Cause / Remedy: This indicates a system warning. Check the ‘CHANNEL

DIAGNOSTICS’ screens for indication of the specific warning.

Problem: The System Alarm light is flashing and the audible sounder is

active.

Cause / Remedy: This indicates a system fault or temperature alarm. Check

the ‘CHANNEL DIAGNOSTICS’ screens for indication of the
specific alarm (Page 14).

27

SECTION5 SPECIFICATIONS

ELECTRICAL:
Supply Voltage: 220-240V AC Single Phase / 24V DC or

12V DC

Ambient Temperature: 0°C to +40°C
Fuses: 2 X 1A 20mm Quick Blow
Alarm Relay Output: 5A changeover 3 pin isolated - (volt-free

contacts)
May be used for low or mains voltage

MECHANICAL:
Dimensions: width: 165mm

height: 160mm
depth: 75mm
weight: SM DUE Unit: 0.96Kg
Sensor: (each) 0.13Kg

Box Material: Plastic
Front Panel: Reverse printed
Display: Large LCD supertwist graphics
SENSORS:
Type: SXTM PT 100 Platinum Film
Compensation: 3 wire compensated
Battery: 9V PP3 Rechargeable

DATABANK CAPACITY:

Recording Frequency of 5 minutes 570 days
Recording Frequency of 10 minutes 1128 days

PARTS LIST

SM DUE Unit (24V) C0403
SM DUE Unit (12V) C0419
Sensor (5m cable) A6905
Sensor (15m cable) A6915
Sensor (25m cable) A6925
Sensor (50m cable) A6950
Sensor (100m cable ) A7999

ACCESSORIES

Sensor Extender 10m A6911 Serial Printer A6747
Sensor Extender 20m A6921 Serial Printer Cable A7433
Sensor Extender 50m A6951 Network Terminators A7256
MASTERLINK Software C0322
MASTERLINK Hardware C0321
Network Connecting Cable : 1m (Ivory) A7004
Network Connecting Cable : 10m (Ivory) A7426
Network Connecting Cable : 20m (Ivory) A7427
Network Connecting Cable : 50m (Ivory) A7428
Network Connecting Cable : 100m (Ivory) A7429
Network Connecting Cable : 200m (Ivory) A7431
Masterlink Software Extension Kit : 10m (Ivory) A7030
Masterlink Software Extension Kit : 20m (Ivory) A7378
Masterlink Software Extension Kit : 40m (Ivory) A7342
Masterlink Software Extension Kit : 60m (Ivory) A7100

28

29

KEYPAD LOCK

The keypad may be locked or unlocked when this window is selected.

To lock, press the key and hold for 5 seconds.

To unlock, press the key and hold for 5 seconds.
When the keypad is locked, the SM DUE enters into a security mode, which renders

the unit ‘tamper-proof’.

There are three functions for which the set keys ( / ) will operate when the
keypad is locked.

(a) Display contrast (see 3.2.1 MAIN SCREEN 1);
(b) Alarm mute and reset (see 3.3.2 System Pre-sets);
(c) Entering the Diagnostics Screen for viewing (see section 3.4).

CE

This product has been tested to the EU EMC 89/336/EEC directive according to the
Manufacturer’s report, which is available on request.

This product is in conformance with the Low Voltage Directive 73/23/EEC.
Thermomax certifies that this datalogging and / or control device has been

manufactured to an ISO 9002 Quality System.
Thermomax undertakes to repair or replace the device if same is shown to be

defective in its manufacture and / or components, but Thermomax shall not be
responsible for any other financial or economic loss (or any indirect loss) which may
be incurred by the buyer / customer or others in the use of the device.

Any claim for repair or replacement must be made not later than 15 months after the
date of manufacture.

30

SM DUE PANELMOUNT

DIMENSIONAL DETAILS

31

WIRING DIAGRAM

Alarm Relay

max 5A

220 / 240 VAC

50Hz

Transformer 12V

THERMOMAX

PANEL-MOUNT

NOTE:

For SM DUE applications:

CH1 = CH1
CH2 = CH2

L

N

E