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.