Calex PyroCAN Series Manual

PyroCAN Series
Operators Guide
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PyroCAN infrared temperature sensors measure temperatures from -20°C to 1000°C and transmit
the reading digitally via a Raw CAN interface.
SPECIFICATIONS
Temperature Range vs Field-of-View table
Field of View Model Number
2:1 PCAN21
10:1 PCAN201
Interface Raw CAN
Accuracy ±1% of reading or ±1ºC whichever is greater
Repeatability ± 0.5% of reading or ± 0.5ºC whichever is greater
Emissivity 0.2 to 1.0, adjustable via CAN
Response Time, t90 200 ms (90% response)
Spectral Range 8 to 14 μm
Supply Voltage 12 to 24 V DC
Supply Current 50 mA max.
Baud Rate 250 kbps
Format see PROTOCOL
MECHANICAL
Construction Stainless Steel
Dimensions 18 mm diameter x 103 mm long
Thread Mounting M16 x 1 mm pitch
Cable Length 1 m
Weight with Cable 95 g
ENVIRONMENTAL
Environmental Rating IP65
Ambient Temperature 0ºC to 90ºC
Relative Humidity 95% max. non-condensing
ACCESSORIES
A range of accessories to suit different applications and industrial environments is available. These
may be ordered at any time and added on-site. The accessories consist of the following parts .
Fixed mounting bracket Adjustable mounting bracket Air purge collar
Laser sighting tool Protective plastic window with stainless steel holder
Mounting bracket with continuous laser sighting
OPTIONS
The following options are available. Options are factory installed and must be ordered with the
sensor.
Air/water cooled housing Certificate of calibration Longer cable
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INSTALLATION
The installation process consists of the following stages:
Preparation Mechanical installation Electrical installation
Please read the following sections thoroughly before proceeding with the installation.
PREPARATION
Ensure that the sensor is positioned so that it is focused on the target only.
OPTICAL CHART
The optical chart below indicates the nominal target spot diameter at any given distance from the
sensing head and assumes 90% energy.
1000
103
12
18
M16 x 1mm
11.9
0
Spot Dia.
(inches)
Spot Dia.
(mm)
Distance: Sensor to object (inches)
Distance: Sensor to object (mm)
61.9
111.9
0.5
2.4
4.4
048
100 200
D:S 2:1
Distance: Sensor to object (inches)
Distance: Sensor to object (mm)
11.9
36.9 61.9
0.5
1.5 2.5
0 19.7 39.4
0 500 1000
Spot Dia.
(inches)
Spot Dia.
(mm)
D:S 20:1
1
PCAN21 PCAN201
Sensor
CORRECT
INCORREC
T
Background
T
arget greater
than spot size
T
arget smaller
than spot size
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DISTANCE AND SPOT SIZE
The size of the area (spot size) to be measured determines the distance between the sensor and
the target. The spot size must not be larger than the target. The sensor should be mounted so
that the measured spot size is smaller than the target.
AMBIENT TEMPERATURE
The sensor is designed to operate in ambient temperatures from 0°C to 90°C.. For ambient tem-
peratures above 90°C, an air/water-cooled housing will be required.
Avoid thermal shock. Allow 20 minutes for the unit to adjust to large changes in ambient tem-
perature.
ATMOSPHERIC QUALITY
Smoke, fumes or dust can contaminate the lens and cause errors in temperature measurement.
In these types of environment the air purge collar should be used to help keep the lens clean.
ELECTRICAL INTERFERENCE
To minimise electromagnetic interference or ‘noise’, the sensor should be mounted away from
motors, generators and such like.
WIRING
Check the distance between the sensor and the connected instrumentation. If necessary, the
sensor can be ordered with a longer cable attached.
POWER SUPPLY
Be sure to use a 12 to 24 V DC (50mA max.) power supply.
MECHANICAL INSTALLATION
All sensors come with a 1m cable and a mounting nut. The sensor can be mounted on brackets
or cut outs of your own design, or you can use the fixed and adjustable mounting bracket acces-
sories which are shown below. Note: The sensor must be grounded at only one point, either the
cable shield or the sensor housing.
12.0
45.0
50.0 50.0
40.0
9.0
15.0
25.0 25.0
60° Rotation 60° Rotation
60° Rotation
9.0
48.0
Fixed Bracket Adjustable Bracket
2 x Mounting Holes M4 Clearance 2 x Mounting Holes M4 Clearance
9.0
24.024.0
Ø16.0
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AIR/WATER COOLED HOUSING
The air/water cooled housing shown below allows the sensor to withstand high ambient temperatures.
It is equipped with two 1/8” BSP fittings. Water temperature should be 10°C to 27°C for efficient cool-
ing. Chilled water below 10°C is not recommended. To avoid condensation, the air purge collar should
be used with the water-cooled housing. Water flow rate should not be more than 0.5 to 1.5 litres/min.
40.0
2119 63
103
M16 x 1mm
1/8 BSP water/air connections
1/8 BSP Air connection
25
APSW
(for PCAN21)
50
APSN (for PCAN201)
20
29
40
AIR PURGE COLLAR
The air purge collar below is used to keep dust, fumes, moisture, and other contaminants away
from the lens. It must be screwed in fully. Air flows into the 1/8” BSP fitting and out of the front
aperture. Air flow should be no more than 5 to 15 litres/min.
Clean or ‘instrument’ air is recommended.
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ELECTRICAL INSTALLATION
PROTOCOL
• The sensor transmits an 8-byte message every 200 ms containing the ambient and object
temperatures in °C.
• The first 4-bytes are the object temperature encoded as a floating-point.
• The second 4-bytes are the ambient temperature encoded as a floating-point.
• This message is sent to the CAN ID stored in non-volatile memory. The ID is persistent between
power cycles.
• The CAN ID may be set to a value from 0 to 2048 (0x0 to 0x800) as a 4-byte unsigned integer.
• The emissivity setting may be set to a value from 0.2 to 1.0 as a 4-byte floating-point.
• These floating-point values can be decoded simply using an IEEE 754 binary-to-decimal
converter.
+-
Other
CAN
devices
Power Supply
12 to 24 V DC
Sensor #1
Sensor #32
PWR-PWR+OP-OP+
Wire colour codes:
Brown PWR+ +12 to +24 V DC
White PWR- 0 V
Yellow OP+ CAN output +
Green OP- CAN output -
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READING THE MEASURED TEMPERATURE
Example message received from sensor:
Object Temperature Ambient Temperature
Bytes DLC DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7
Value 80x51 0x39 0xB2 0x41 0xA4 0x70 0xDF 0x41
Hex 0x41B23951 0x41DF70A4
Encoding Float Float
Decimal 22.28 °C 27.93 °C
COMMANDS
Get Emissivity Setting [0x86]
After this command is sent, the sensor will return the emissivity setting as a floating point value as
follows:
Value No value is sent. The sensor will return the emissivity setting.
Encoding Float
Hex 0x00000000
Bytes DLC DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7
Value 50x86 0x00 0x00 0x00 0x00 - - -
Command ID Send the command with these bytes empty.
The sensor will return the emissivity setting in
these bytes as a floating-point value.
After the following commands are sent, the sensor will send back the same data as an “echo” to
confirm it was received:
Set Emissivity Setting [0x06]
Value 0.95
Encoding Float
Hex 0x3F733333
Bytes DLC DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7
Value 50x06 0x33 0x33 0x73 0x3F - - -
Command ID Emissivity Setting
Set CAN ID [0x0D]
Value 13
Encoding Unsigned Integer
Hex 0x0000000D
Bytes DLC DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7
Value 50x0D 0x0D 0x00 0x00 0x00 - - -
Command ID CAN ID
Note: Changing the CAN ID is effective immediately and therefore any following commands must be to the new CAN
ID.
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MAINTENANCE
Our customer service representatives are available for application assistance, calibration, repair, and
solutions to specific problems. Contact our Service Department before returning any equipment. In
many cases, problems can be solved over the telephone. If the sensor is not performing as it should,
try to match the symptom below to the problem. If the table does not help, call Calex for further advice.
Troubleshooting
Symptom Probable Cause Solution
No output No power to sensor Check power supply
Erroneous temperature Incorrect wire connection Check wire colour codes
Erroneous temperature Faulty sensor cable Verify cable continuity
Erroneous temperature Field of view obstruction Remove obstruction
LENS CLEANING
Keep the lens clean at all times. Any foreign matter on the lens would affect measurement accuracy.
Blow off loose particles (if not using the air purge accessory) with an air ‘puffer’.
GUARANTEE
Calex guarantees each instrument it manufactures to be free from defect in material and workmanship
under normal use and service for the period of one year from the date of purchase. This guarantee
extends only to the original buyer according to Calex terms and conditions of Sale.
OPERATION
Once the sensor is in position and the appropriate power, air, water, and cable connections are secure,
the system is ready for continuous operation by completing the following simple steps:
1. Turn on the power supply
2. Turn on the CAN instrumentation
3. Read / monitor the temperature
IMPORTANT
Be aware of the following when using the sensor:
• If the sensor is exposed to significant changes in ambient temperature (hot to cold, or cold to hot),
allow 20 minutes for the temperature to stabilise before taking or recording measurements.
• Do not operate the sensor near large electromagnetic fields (e.g. around arc welders or induction
heaters).
Electromagnetic interference can cause measurement errors.
• Wire must be connected only to the appropriate terminals.
Issue A - March 2017
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