LAUREL MAGNA Installation instructions

1
Rear case screws - please note
The rear panel is held in place with finger-screws, which
only need to be gently tightened.
Do not use tools to tighten or loosen the screws, as
this could cause damage to the internal threads.
!
Caution: Risk of electrical shock if this instrument is not properly installed.
Caution: Read the whole manual before you install this display.
LAUREL Electronics, Inc.
3183-G Airway Ave, Costa Mesa, CA 92626, USA
Tel [phone] Fax [phone]
www.laurels.com [e-mail]
MAGNA 4-Digit Large-Digit
Temperature Indicator / Controller
Installation & Operating Manual

2
.Warranty
We warrant our products against defects in materials or workmanship for a period of one
year from the date of purchase.
In the event of a defect during the warranty period, the unit should be returned, freight (and
all duties and taxes) prepaid by the Buyer to Laurel or to the authorized distributor from
whom the unit was purchased.
Laurel or the distributor, at their option, will repair or replace the defective unit. The unit
will be returned to the Buyer with freight charges prepaid by the distributor.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from:
1. Improper or inadequate maintenance by the buyer.
2. Unauthorized modification or misuse.
3. Operation outside the environmental specification of the product.
4. Mishandling or abuse.
The warranty set forth above is exclusive and no other warranty, whether written or oral is
expressed or implied. We specifically disclaim the implied warranties of merchantability
and fitness for a particular purpose.
EXCLUSIVE REMEDIES
The remedies provided herein are the buyer’s sole and exclusive remedies.
In no event shall we be liable for direct, indirect, incidental or consequential damages
(including loss of profits) whether based on contract, tort or any other legal theory.

3
Warranty 2
Contents 3
Warnings 4
Introduction 5
General Description 6
Connecting Your Display 7-8
Suspension Mounting Dimensions 9
Wall Mounting Dimensions 10
Panel Mounting Dimensions 11
MAGNA Connections 12-13
Temperature Display Connection Diagram 14
Installation Hints for Best Performance 15
Language Selection for User Interface 16
Display Brightness Adjustment 16
Meter Calibration Modes 17
Direct Calibration - Full Scale Setting 18
Direct Calibration - Zero setting 19
Theoretical Calibration - Decimal Point & Scale 20
Theoretical Calibration - Low End Calibration 21
Sensor Drift Correction 22
Logic Input Connection & Front Buttons 23
Factory Defaults 24
Signal Filtering / Averaging 25
Filter Jump Value 26
Last Digit Rounding 27
Scale Factor Adjustment 28
Offset Adjustment 29
Menu Timeout Adjustment 30
Reverse Dipslay Function (Mirror Image) 31
Bootup Routine and Tare Save Choices 32
Error Codes and Fault Finding 33
Main Display Specifications 34
RTD Input Specifications 35
Thermocouple Input Specifications 36
Declaration of CE Conformity 37
* Need a manual urgently? You can download manuals from our website.
https://www.laurels.com/download-manuals.php
Contents

4
Warnings
Please carefully read this manual and all warnings. Install the display ONLY when you are sure
that you’ve covered all aspects.
Where the product is intended for “UL” installations, removal or addition of option
boards is not permitted.
Check that the model number and supply voltage suit your application before
you install the display.
Connect the display according to current IEE regulations, IEC61010 &
NFPA:70 National Electric Code in USA.
Power supplies to this equipment must have anti-surge (T) fuses rated at 1A for
230V supply, 2A for 110V supply, 5A for 48VAC supply or 10A for 11-30VDC.
Don’t touch any circuitry after you have connected the display, because there may
be lethal voltages on the circuit board.
Do not apply power to the display if its case is open.
Only adjust on-board switches or connections with the power turned off
Make sure all screw terminals are tight before you switch the meter on.
Only clean the display’s case and window with a soft damp cloth. Only lightly dampen
with water. Do not use any other solvents.
!
!
!
!
!
Rear case screws - please note
The rear panel is held in place with finger-screws, which
only need to be gently tightened.
Do not use tools to tighten or loosen the screws, as
this could cause damage to the internal threads.

5
Introduction
Please contact us if you need help, if you have a complaint, or if you have suggestions to help
us improve our products or services.
If you contact us about a product you already have, please tell us the full model number and
serial number, so that we can give you accurate and fast help.
This product has a 1-year warranty. We will put right or replace any display which is faulty
because of bad workmanship or materials. This warranty does not cover damage caused by
misuse or accident.
If you return a unit for repair, please include a detailed description of the problem, and the
name of a contact who we can refer to for any questions. Please mark for the attention of the
QA Department.
IMPORTANT
If this equipment is important to your process, you may want to buy a spare to cover possible
failure or accidental damage in the future.
This is because during factory shutdown periods, you may have to to wait several weeks for
an equivalent replacement, or we may have no stock at the time you urgently need it.
You may also need to pay extra carriage charges if you want a fast, guaranteed courier service.
Warranty repairs or replacements are usually returned with a standard courier service.
We do not offer compensation for losses caused by failure of this instrument.
If you do not agree with these conditions, please return this item in unused condition, in its
original packaging and we will refund the purchase price, excluding any carriage paid.
We thought you’d prefer to know about possible delays and extra charges now, rather than
during a panic. A spare unit could help to avoid these issues.
We always try to improve our products and services, so these may change over time. You
should keep this manual safely, because future manuals, for new designs, may not describe
this product accurately.
We believe these instructions are accurate, and that we have competently designed and
manufactured the product, but please let us know if you find any errors.

6
General Description
MAGNA temperature displays consists of a MAGNA 4-digit, 4-20 mA analog input large digit
display and an external Laureate LT series RTD or thermocouple transmitter with a 4-20 mA
analog output. Use of a 4-20 mA interface allows long cable runs while keept the thermocouple
or RTD leads short. The Laureate transmitter is typically DIN rail mounted inside a cabinet.
The Laureate RTD transmitter, if selected, can be set up for four RTD types: Pt100 for DIN
alpha of 0.00385, Pt100 for ANSI alpha of 0.003902, nickel Ni120, or Copper Cu10. The
Laureate thermocouple tansmitter, if selected, can be set up for seven thermocouple types:
J, K, T, E, N, R, S. Both transmitters can be set for °C or °F, and 1° or 0.1° resolution. A
resolution of 0.1° is normally reserved for RTDs. When you specify the sensor type, °C
or °F, and 1° or 0.1° resolution, the system is shipped ready to run for your application.
Available digit heights are 57 mm (2-1/4"), 102 mm (4.0"), 150 mm (5.9"), and 200 mm
(7.9"). For every 10 meters of viewing distance required, use 1” of digit height.
Options include 100-240 Vac or 11-30 Vdc power; normal of daylight viewing display
brightness; wall mount, suspension mount or panel mount; and a heater for operation down to
-25°C. Heaters can be specified for AC power or 24 Vdc power.
MAGNA displays must be installed fully assembled, and must be installed according to local
electrical installation rules.
When properly installed, and provided they have been ordered with cable glands exiting the
lower surface of the case, the main display unit provides environmental protection to IP65 /
NEMA4X from all sides.
Safety
Obey all safety warnings in this manual, and install the display according to local wiring and
installation regulations. Failure to follow these guidelines may cause damage to the display,
connected equipment, or may be harmful to personnel.
Any moving mechanical device controlled by this equipment must have suitable access guards
to prevent injury to personnel if the display should fail.
!
Caution: There is a risk of electrical
shock if this display is not properly installed
Caution: Risk of danger: Read the whole
manual before you install this display

7
Connecting Your Display
MAGNA temperature displays are shipped with an external Laurate LT temperature transmitter.
As specified in the order, the transmitter will be set up for a specific RTD or thermocouuple
type, for display in °C or °F, and for 1° or 0.1° resolution. 0.1° resolution should only be used
for RTDs. The 4-20 mA output of the transmitter will be scaled for the temperature range of
interest, which
To wire the display, insert circular cables through the provided M12 cable compression glands.
These are rated for round cables with a diameter of 3.0 to 6.5 mm (1/8” to 1/4”). When the
outer nut is tightened by hand, seals inside the gland are compressed against the cable,
thereby making a hermetic seal.
For power, insert a 6.5 mm (1/4”) diameter round power
cable through one of the glands, and connect it to the
unterminated power cord insid the display using twist-on
wire connectors.
Connect a thermocouple signal to the transmitter as illustrated below, and run the 4-20
mA output of the transmitter trom P4-2 and P4-1 hrough an available gland of the display unit.
Do not remove the cold junction sensor, as it is part of transmitter calibration. For more
informatiin on Laureate RTD transmitters, see https://www.laurels.com/transmitter-rtd.php and
the user manual at https://www.laurels.com/downloadfiles/LT-manual-analog-in.pdf

8
Connecting Your Display (continued)
Connect an RTD temperature signal to the transmitter as explained below, and run the
4-20 mA output of the transmitter trom P4-2 and P4-1 through an available gland.
t.
In 2-wire hookup, the meter senses the com-
bined voltage drop across the RTD and both lead
wires. The voltage drop across the lead wires can
be measured by shorting out the RTD during meter
setup, and this voltage is then automatic-ally
subtracted from the combined total. However,
changing resistance of the lead wires due to
ambient temperature changes will not be com-
pensated.
In 3-wire hookup, the meter senses the com-
bined voltage drop across the RTD plus two
excitation leads. It also senses the voltage drop
across one excitation lead, and then subtracts twice
this voltage from the combined total. This technique
effectively subtracts all lead resistance and
compensates for ambient temperature changes if
the two excitation leads are identical.
In 4-wire hookup, different pairs of leads are used
to apply the excitation current and sense
the voltage drop across the RTD for ratiometric
operation, so that the IR drop across the excitation
leads is not a factor.
For more informatiin on Laureate thermocouple transmitters, see https://www.laurels.com/
transmitter-thermocouple.php and the user manual at https://www.laurels.com/downloadfiles/
LT-manual-analog-in.pdf

9
Suspension Mounting Dimensions
Display Format X mm H mm W mm Y mm
2” 4 digit numeric 219.5 154.5 376 249.5
4” 4 digit numeric 374 195.5 434 404
6” 4 digit numeric 520 246 580 550
8” 4 digit numeric 690 290 750 720
77 mm
H mm
X mm
Plan View
Short-drop mounting holes
Long-drop mounting holes
Y mm
15mmO
6.35mmO 15mmO
6.35mmO 25mm
157.5mm 207.5mm
220mm
OK
dg
W mm
Cable Glands. Number of glands
depends on installed options.
H mm
25mm
You can order these displays with the cable
glands in the bottom surface (as shown) the
rear, or top.
Rear glands allow you to mount the display on
top of a cubicle, using the brackets shown.
M8X12 S.S. bolt
Spring washer
Flat washer
Bracket
Rubber washer
Display boss M8 female *
Case
Detail showing bracket
hardware fitting sequence
* Do not use longer bolt threads than
12mm , or you will fracture the female boss
and the case will no longer be sealed.

10
Wall Mounting Dimensions
OK
dg
X mm
60 mm 80 mm
72.5 mm
60 mm
98 mm
60 mm
Wall
H mm
The 4 bracket holes are 5.2mm diameter
22mm
W mm
25mm
Cable Glands. Number of glands
depends on installed options.
Display Format X mm H mm W mm Y mm
2” 4 digit numeric 219.5 154.5 376 249.5
4” 4 digit numeric 374 195.5 434 404
6” 4 digit numeric 520 246 580 550
8” 4 digit numeric 690 290 750 720
You can order these displays with the cable
glands in the bottom surface (as shown) the
rear, or top.
Rear glands allow you to mount the display on
top of a cubicle, using the brackets shown.
M8X12 S.S. bolt
Spring washer
Flat washer
Bracket
Rubber washer
Display boss M8 female *
Case
Detail showing bracket
hardware fitting sequence
* Do not use longer bolt threads than
12mm , or you will fracture the female boss
and the case will no longer be sealed.

11
Panel Mounting Dimensions
OK
dg
A mm
W mm
B mm
Neoprene
gasket
Neoprene
gasket
Bezel
H mm
25mm
Cable glands
8mm
67mm
Display Format X mm H mm W mm Y mm
2” 4 digit numeric 219.5 154.5 376 249.5
4” 4 digit numeric 374 195.5 434 404
6” 4 digit numeric 520 246 580 550
8” 4 digit numeric 690 290 750 720
M8 x 15 bolt
Spring washer
Flat washer
Wall Bracket
M8 x 20 bolt, gasket compresser
Case
Detail showing bracket hardware fitting sequence
Fit first
Fit last
Panel cutout dimensions
A+3mm(h) x B+3mm(w) Panel
Bezel
Neoprene gasket

12
Demand
Common
Data A+/Rxd
Data B- /Txd
nil nil
MAGNA Connections
Alarm Lock Calib’n Lock
Common
CC.1 CC.2 CC.3
Logic Inputs Power
Signal Input & Excitation
N L
- +
Remote
contacts
(5V DC 1mA)
Earth
1 2 3 4 5 6 7 8 9 10 11 12 13
Processor and signal input board
Power Supply board
Internal power link, installed by the factory
Fuse
Earth
- or N
+ or L
N L
- +
Earth
Fuse Switch
Customer-supplied disconnection
and overload protection devices
Circuit breaker
Power
E
Inside the enclosure Outside the enclosure
Warning:
Disconnect all power before
removing the rear of the display
There is a range of possible locations for the input board, output board and power supply
boards. Their locations depend on the height of digits, number of digits, brightness of digits
and any installed options. Because the permutation of possible locations is large, we will not
describe the location of boards within the display, but simply identify the connectors and their
functions on each board, below ...
OK Digit

13
MAGNA Connections
Serial Data
output option
0, 2 or 4 Alarm Relay
output options
- +
AL4 AL3 AL2 AL1
B
A
Comm
Enable
TxD
RxD
Comm
Enable
Rated 2A 250VAC Resistive
Enable is used in mode C1
to activate or de-activate the
RS232 or RS485 serial output.
Connect to Comm to continually
transmit data.
27 26 25 24 23 22 21 20 19 18 17 16 15 14
R S 4 8 5
R S 2 3 2
Output option board (if fitted)
Analog
output
option
Button function
Remote buttons
Display’s front panel
buttons enabled/disabled
by jumper or connection
Remote programming button connector
On one of the display boards, you will find a 7 way connector, to which you can wire remote
programming buttons, to allow adjustment of the display’s settings when the display is
inaccessible.
You can also enable or disable the display’s front panel buttons, either by a remote contact
closure, or by an on-board push-on jumper switch, which is located near to the remote
button connector. When the contact is closed, or the push-on switch fitted, the front buttons
are enabled.
Connectors and options
Connectors may be
present even if output
options are not installed.
Refer to rating label to see
installed options.
!
Warning:
Disconnect all power before
removing the rear of the display
Rear case screws - please note
The rear panel is held in place with finger-screws, which
only need to be gently tightened.
Do not use tools to tighten or loosen the screws, as
this could cause damage to the internal threads.
Close contact or fit jumper to
enable front panel buttons
OK
Output
Set2
Set1
Common
Common
Enable

14
Temperature Display Connection Diagram

15
Installation Hints for Best Performance
This section offers several suggestions which will help you get the best performance from
your measurement system.
Some sensors generate comparitively small signals which can easily be corrupted by the
potentially high level of electrical noise which can be created by electrical machinery such as
motors, welding systems, discharge lighting, AC power inverters and solenoids. These steps
will ensure you get the best possible performance from your system.
1. Use good quality screened signal cable, with twisted pairs. Belden 8777NH,
Belden 9503 and AlphaWire 6010C are good choices, available from many
electrical distributors.
2. If you are using multi-pair twisted cable, each pair should be dedicated to a single
display as shown opposite, for maximum noise immunity.This will ensure that any
electrical noise induced in the cable is properly cancelled. Mixing destinations
carelessly amongst the twisted pairs can actually worsen noise performance.
3. Signal and power cables should be routed away from noisy wiring and devices such
as power feeds, inverters, discharge-lighting cables, welding cables etc. They
should preferrably be routed in a dedicated low voltage signalling/instrumentation
conduit or cable tray.
4. When using multi-core screened cable to connect several displays to several data
sources, use only one twisted pair for each display or sensor. Do not use a wire
from one pair for signal positive and a wire from another pair for signal negative, as
this would prevent the twisted cables form cancelling induced electrical noise, and
could couple noise from one source to another.o
4. Screened cable should be earthed at the display end only.
5. All wires and screens coming out of the screened cable should be kept as
short as possible to minimise pickup of noise.
6. If you are using barriers, you should earth your screen as shown below, paying
particular care that you do not earth both ends of any run of of cable.
Signal Input Logic Input Power Input
Display connections
Terminal 7
on logic
input
connector
Barriers
EARTH
Connect screen
to earth ONLY
at this end.
Do not connect
screen at this
end.
Do not connect
screen at this
end.
Length of screened cable Length of screened cable
Sensor
Hazardous Area Safe Area
Clean Earth
Sensor connections Barrier
connections
Connect screen
to earth ONLY
at this end.

16
Language Selection for User Interface
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset Lockout Switch must be OFF
Press together, briefly
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
For 4 digits: for English
or for French.
(Default = English)
Press to toggle
OFF
Circuit board ON
Display Brightness Adjustment
You can adjust the display brightness at any time, provided the display is locked.
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press for 3 seconds
For 4 digits, display shows
Each press of the UP button selects
a new brightness level.There are 7
brightness levels to choose from.
(Default = Full brightness)
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to accept
Done!
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Done!
Press to accept
1
2
3
2
3
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset Lockout Switch must be ON
Press 3 seconds
OFF
Circuit board ON
1

17
Meter Calibration Modes
You can choose from two main calibration methods:
1. Direct Calibration - this is when you connect the meter to your system and make
the meter read what you want it to, at two different points. This is the preferred
calibration method, because it allows you to calibrate the system as a whole.
2. Theoretical Calibration - this is when you type in the sensor’s theoretical signal
level at the bottom and top of its range and then type in the value the display should
show, for each signal level.
How to choose a calibration method:
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset Lockout Switch must be OFF
Press 3 seconds
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to select dirECt or thEor
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to accept
If you chose Theoretical, you will now be asked whether your input signal
will be DC Current or DC voltage ... the display will show (4 digits)
followed by or
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to select dc A or dc V
Display shows then
for current or
for voltage (Default)
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to accept
1
2
3
4
5Done!
OFF
Circuit board ON
For 4 digits, display shows then
or (Default)

18
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Direct Calibration - Full Scale Setting
This is when you connect the meter to your system and make the meter read what
you want it to, at 2 different points. This is the preferred calibration method,
because it allows you to calibrate the system as a whole.
How to do direct calibration:-
If you have not done so before, please select Direct Calibration mode from
the previous page.
First we recommend you set the FULL SCALE calibration ...
Lockout Switch must be OFF
Display shows (4 digits)
followed by
Press 3 seconds
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Apply the highest calibration signal you
can achieve, ideally 100% of system
capacity. You can use less, but you will
get better accuracy with higher signals.
Now press OK
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press for 3 seconds
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
You can now set the display value you
want to see - use DIGIT to select each
digit in turn, and the UP or DOWN arrow
to increase or decrease each digit’s
value, as required.
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to accept
1
2
3
4
5
Press Set2 for 3 seconds. You can now
set your decimal point position using
the UP or DOWN buttons. Press OK
when done.
Done!
OFF
ON

19
Direct Calibration - Zero Setting
How to calibrate the ZERO point.
You can set Zero first, if you prefer, but you will not be able to change the decimal
point position in the ZERO calibration step.
This will not be an issue if your zero calibration reading is 0, but may become
confusing otherwise.
When you have finished your calibration, please remember to put the calibration
lockout switch in its ON position, to protect your settings.
OK
Max/Min Reset
Lockout Switch must be OFF
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Apply the lowest calibration signal
you can achieve, ideally 0% of
system capacity. Then press OK
1
For 4 digits, display shows followed by
For 6 digits, display shows followed by
OFF
Circuit board ON
Set1 Set2 Output Alarms
Digit
Press 3 seconds
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to accept
Done!
Set1 Set2 Output Alarms
Digit OK
Max/Min
You can now set the display value you
want to see - use DIGIT to select each
digit in turn, and the UP or DOWN
arrow to increase or decrease each
digit’s value, as required.
2
3
4

20
Theoretical Cal. - Decimal Point & Full Scale
This is when you type in the sensor’s theoretical signal level at the top and bottom of
its range and the value to display, for each signal level.
If you have not done so before, please select Theoretical Calibration
mode from the Meter Calibration page AND choose whether your
input is current or voltage.
First we recommend you set the FULL SCALE calibration ...
1
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Display now shows briefly. You
can now specify the maximum reading
and decimal point position. Press Set2
button for 3 seconds to set decimal point
position. Use up and down arrows to
move the decimal point and press OK
when done. Then, use DIGIT to select
each digit in turn, and the UP or DOWN
arrow to increase or decrease each
digit’s value, as required. eg set 100.0 if
your display range is 0 to 100.0
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to accept
Done!
Defaults are
4-20mA = 0-100.0 for dCA and
0-10V = 0-100.0 for dC V
Max/Min Reset
Lockout Switch must be OFF
OFF
Circuit board ON
Set1 Set2 Output Alarms
Digit OK
Press 3 seconds
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Display shows (4 digits) followed
by or , depending on whether
you have chosen current or voltage input,
then
You can now specify the maximum input
signal. Use DIGIT to select each digit in
turn, and the UP or DOWN arrow to
increase or decrease each digit’s value.
Eg., set (4 digits) if your input is
4-20 mA.
Set1 Set2 Output Alarms
Digit OK
Max/Min Reset
Press to accept
2
3
4
5
!
!