Thermomax SMX 100 User Manual
THERMOMAX
SMX 100
Microprocessor Based Refrigeration Controller
Datalogger and Alarm
ENGLISH
www.Thermomax-Group.com
CONTENTS
SECTION 1 - INTRODUCTION ...................................................…...................... 2
SECTION 2 - INSTALLATION ..................................................….…...................... 3
2.1 - SMX 100 Unit ....................................................................... 4
2.2 - Sensors .........................................................……............... 4
2.3 - Alarm Relay ..................................................…….…............ 5
2.4 - Power Connections and Wiring Diagram ……..........…. 5
2.5 - Battery ............................................................………........... 6
SECTION 3 - SMX 100 OPERATION ...........................................……............…. 7
3.1 - DESCRIPTION ......................................…...……...........… 7
3.2 - MAIN SCREEN:
3.2.1 Main Information Displays ............…….........…... 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 - DEFROST SCREENS: Real-time Defrost Settings 14
3.5 - ALARM/DIAGNOSTIC SCREENS:
3.5.1 ALARM SCREEN: High and Low Level Alarm
Pre-set ....................................................................... 16
3.5.2 DIAGNOSTICS SCREEN: System Status
Information …......... 18
3.5.3 DATABANK DIAGNOSTICS SCREEN ..…....19
3.6 - PLOT SCREENS:
3.6.1 PLOT SCREEN 1: Current Day Plot .…... 20
3.6.2 PLOT HISTORY: Data Log of Previous
Days ......................................... 21
3.7 - CALIBRATION TRIMMING ................................................. 22
3.8 - DATA TRANSFER .................................................... 23
3.8.1 Transferring Data Using the Masterlink
Software .................................................................. 23
3.8.2 Transferring Data to the Masterlink Hardware .. 23
3.8.3 Printing Data to the Thermomax Serial Printer .. 25
3.9 - DATA TRANSFER - Panelmount units Only .................... 26
SECTION 4 - FAULT FINDING ...................................................................…….... 30
SECTION 5 - SPECIFICATIONS ..........................................................……......… 31
KEYPAD LOCK …………………………………………………......……………… 32
NEW FEATURE OF SMX 100 PANELMOUNT …………………….........………. 33
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2
SECTION 1 - INTRODUCTION
The SMX 100 microprocessor-based system uses modern technology to ensure that
the cold-room is controlled and monitored with the greatest of ease.
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.
The 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
presses.
SUMMARY OF FEATURES
CONTROLLER
• Bargraph display of cold-room and product temperature with rise / fall
indication.
• Large, clear display of room, product and evaporator temperature.
• Cold-room thermostat adjustable in 1°C steps with adjustable differential.
• Compressor switching limiter for short-cycling prevention.
• Fan enable thermostat.
• 12 Cycles of real-time defrost with adjustable duration, termination
temperature and dwell period.
• Manual defrost activation and override.
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.
• Status window for system fault indication.
• Diagnostics screen revealing system parameters.
• Alarm history record for low alarm, high alarm and mains fail.
• Battery back-up for mains-fail operation.
DATALOGGER
• Paperless datalogger with automatic filing by date.
• 50-year clock / calendar for datalogger filing.
• The PRODUCT temperature is sampled every 15 minutes and stored to
an internal databank.
• Defrost and alarm state sampled every 15 minutes.
• Contents of internal databank can be transferred directly to the PC or via a
MASTERLINK HARDWARE module.
• ‘Percentage of internal databank used’ indication in bargraph and digital form.
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.
Thermomax reserves the right to change specifications without prior notice.
SECTION 2 – INSTALLATION
NOTE: This installation procedure is for guidance only, and its suitability should be
verified by the installer.
It is assumed that the refrigeration plant is physically installed and tested, and is
ready for operation and connection to the electric supply.
SAFETY PRECAUTIONS
The following safety precautions are strongly recommended:
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 connections made are secure. If any maintenance work e.g.
installing a new battery is required, 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 labels.
6 It is advisable to route mains cables away from low voltage or sensor cables.
3
4
2.1 SMX 100 UNIT
NOTE: For viewing comfort, the SMX 100 should be positioned at eye level.
It is always good practice to keep electronic controls away from extremes of
cold, heat and electrical plant, as extremes of temperature may reduce the
lifetime of the device, and heavy electrical loads, switches, relays or
contractors 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, either behind or under the
box, whichever is suitable for your particular installation.
2.1.2 Fasten the screw corresponding to the top centre lug on the back of
the SMX 100 unit, into the wall or panel on which the control box is to be
mounted. Leave a gap of approximately 3mm between the screw head and
the wall. Position the unit and slot in the lug over the screw.
2.1.3 Level the SMX 100 unit and, if using rear entry, mark the entry holes
in the panel behind the appropriate knockout entries, as well as the two lower
mounting holes. Remove the unit, drill the necessary holes in the panel,
assemble any grommets or conduit adapters if used, replace the box and
fasten using the two lower screws.
2.2 SENSORS
Included are three identical temperature sensors, each supplied with 5m of
cable. If required, sensors are available with extended cable lengths or
alternatively, sensor extenders are available, also in a variety of lengths. If the
sensors need to be extended but factory-made extenders are not available,
they can be extended using a suitable 4 core or 3-core cable, according to
the diagram shown below.
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 a sensor extender should be used.
2.2.1 Install the ROOM sensor in the cold-room, ensuring that it is not too
close to either the evaporator fan or the door. Position the sensor such that it
reads the average cold-room temperature.
2.2.2 Attach the EVAP sensor to the evaporator fins, ensuring that it is not
too close to the defrost heater elements. Ideally, the sensor should measure
the temperature of the evaporator coil, and should not be directly affected by
the heater element. Therefore it is important to ensure good heat conduction
between the evaporator tube and the sensor.
5
2.2.3 Install the product sensor either to measure the air temperature or
product temperature (or simulated product), as required, depending on the
application. The SMX 100 uses the temperature measured by this sensor for
logging purposes only.
2.3 ALARM RELAY
NOTE: The alarm relay is a 3 contact changeover arrangement which is
isolated (volt-free). This relay is normally energised, and switches off when
the alarm is triggered, or in case of mains failure. It may be used to trigger
an external bell, warning lamp, or digital communicator (telephone dialler).
Low Voltage only should be applied to the alarm relay terminals.
If an external device is used, connect the alarm relay as appropriate.
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, though not over-tightened, as loose power connections
will over-heat, and may cause fire. It is important that the specified loads of
13A per output are not exceeded. Where these loads may be exceeded,
external contactors should be used. It is good practice to keep mains cables
away from sensor cables and other low voltage signal cables.
2.4.1 Connect the compressor, fan and defrost heater cables to the
corresponding terminals in the SMX 100 unit, referring to the diagram below.
2 4.2 Connect the mains wires.
The unit is now ready to be powered up.
THESE RELAY RATINGS APPLY TO THE
STANDARD UNIT ONLY
6
2.5 BATTERY
The battery supplied is a PP3 nickel metal hydride rechargable 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 product temperature for up to 1 hour, and maintaining the system
clock. If a longer period of mains failure is anticipated, a battery kit of up to
72 hours capacity can be supplied by Thermomax.
If the power cut takes longer and the battery has discharged, the clock must
be reset when the power supply is re-established. The system parameters
remain intact.
It is recommended that this battery be changed every 12 months, in order to
maintain good mains failure operation. When replacing, ensure that the
same type of battery is used as specified - only a rechargeable PP3 battery
should be used directly, as the battery is charged from the unit.
7
SECTION 3 - SMX 100 OPERATION
In order to fully understand the operation of the SMX 100, this section should be
read carefully.
3.1 - DESCRIPTION
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 SMX 100 datalogger:
- Alarm Screen
- Main Screen - Diagnostics Screen
- Databank Diagnostics Screen
- Set Screen 1
- Set Screen 2 - Plot Screen
- Set Screen 3
- Defrost Screen 1 - Data Transfer Key
- Defrost Screen 2
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.
1
3
4
5
2
8
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 indicators represent the state of the output relay. When lit, they indicate
that the corresponding relay is energised.
COMPRESSOR
FAN
DEFROST HEATER
SYSTEM ALARM
9
3.2 MAIN SCREEN
3.2.1 MAIN INFORMATION DISPLAYS
1 MAIN function selector.
2 Clock display: 24-hour format with day of week abbreviation.
3 Cold-room temperature bargraph display.
4 Product temperature bargraph display.
5 Display select indicator.
The highlighted box indicates which temperature is displayed.
The options are : E - Evaporator
R - Room (cold-room)
P - Product (temperature used for logging purposes
only)
To change selection, use the keys, as appropriate.
Note: The evaporator temperature view is momentary only. The display will
revert back to room temperature when the select key is released.
6 Digital display of selected temperature, with minimum/maximum indication.
The minimum and maximum values are daily values, and are reset at
midnight every day.
7 Internal databank indicator: This indicates the percentage ‘used’, in both
bargraph and digital form.
Note: The display contrast may be adjusted from this screen by pressing
the key to increase or the key to decrease the contrast.
To adjust quickly, press and hold the required key for auto repeat.
3
2
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6
1
4
5
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3.3 SET SCREENS
3.3.1 SET SCREEN 1: CLOCK / CALENDAR SCREEN
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.
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