Keller CellaCast PA8 Series User manual

PYROMETER
CellaCast PA 8x
Ident no.: 1117989 05/2022
QUICK GUIDE

EN
1 General
This manual gives you brief information on how to properly install the pyrometer of the PA 8x
series. Detailed information can be downloaded from our website www.keller.de/its/.
2 Explanation of symbols
Important notes in this manual are marked with a symbol.
ATTENTION
This symbol points out guidelines. If you do not observe them, the device
might be damaged, malfunctioning or even fail to operate.
This symbol points out hints and information which should be heeded for efficient and
trouble-free operation.
►This symbol instructs the operator to take action.
> Response, Result. This symbol indicates the result of the action.
3 Laser safety instructions
Class 2 Laser Product
• Never look directly into the laser beam path
(emitted power <1.0 mW at a wavelength of 630-670 nm)
• Do not leave the instrument unattended when the laser is activated.
• Do not point the laser beam at any person.
• During pyrometer installation and alignment, make sure to avoid the possibility of laser light
reflections caused by reflective surfaces.
• All currently valid laser safety standards must be observed.
Laser Warning Label
The black and yellow laser warning label is affixed next to nameplate of the instrument. An arrow
indicates the laser emission path (lens opening).
4 Selecting an installation location
When choosing the installation location and during the pyrometer alignment, it is imperative to
ensure that only the free pouring stream is within the field of view.
When the background is hotter than the object focused on or when the measurement is made
through the inoculant, the accuracy of measurement will be influenced.
The pyrometer should be oriented as far as possible at right angles to the pouring stream. Ide-
ally, the pyrometer should be mounted so that it is aligned with the back of the pouring stream.
Pyrometer CellaCast PA 8x
Quick start guide
Quick Start Guide CellaCast PA 8x

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1: Ideal measuring point
5 Mechanical installation
The distance should be adjusted in that way, that the pouring stream is wide enough to fill up
at least 30 % of the measurement area. Reduce the distance, if the pouring stream covers less
than 30 % of the measurement area. When aiming the pyrometer, make sure that the pouring
stream is in the centre of the measurement area. During pouring it must be ensured that the
pouring stream is always within the measuring field, even if the pouring stream is fluctuating.
In order to prevent the pyrometer optics from contamination, connect the scavenging air. Ap-
prox. 50 l/min with a maximum pressure of 6 bars are required for that. Use oil-free and dirt-free
compressed air. If the expected ambient temperatures are > 65 °C, a cooling system is required.
1: Target size
2: Pouring stream
3: Field of view
4: Distance to target
6 Assembly fibre optic cable
One end of the optical fibre has a nameplate showing the serial number of the corresponding
basic pyrometer. This is the end which must be screwed onto the pyrometer. For proper connec-
tion, the arrow on the nameplate of the fibre optic cable and the arrow on the pyrometer should
point toward each other. The serial number of the measuring head should also correspond to
the pyrometer.
ATTENTION
The fibre optic cable must not be exposed to tensile load and must not be
twisted. The minimum bending radius is 125 mm.
Quick Start Guide CellaCast PA 8x

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7 Electrical connection
The pyrometer is supplied with low voltage 24 DC (18 ... 32 V DC).
ATTENTION
The device may only be installed by a skilled, qualified electrician. Do not
connect it while the voltage supply source is turned on. Please observe
international safety regulations at all times.
►Disconnect the pyrometer from any voltage source.
►Connect the pyrometer according to the following schematic.
PA Pyrometer
1
5
6
3
4
7
2
8
L
+
L–
RS485
0/4–20 mA a
+
–
0/4–20 mA
0/24 V
0/24 V 0–10 V
shielded Digital
IN/OUT1 IN/OUT2
Analogue
OUT1 OUT2
Analogue
IN
1
2
3
4
56
7
8
Pin 1 WH (white) L+ (Power supply 24V DC)
Pin 2 BN (brown) Digital in- / out 1
Pin 3 GN (green) Analogue output 2/ analogue input
Pin 4 YE (yellow) Analogue output 1
Pin 5 GY (grey) Serial interface RS 485 (A) /Tx-/D-)
Pin 6 PK (pink)
Serial interface RS 485 (B) /Tx+/D+)
Pin 7 BU (blue) Digital in- / output 2
Pin 8 RD (red) L- (GND)
The pyrometer must be protected against electromagnetic fields. Therefore, use a shiel-
ded cable, connecting it via connector casing of the pyrometer to the housing.
Use a flyback diode when switching inductive loads.
Quick Start Guide CellaCast PA 8x

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Quick Start Guide CellaCast PA 8x
8 Focussing
If the pyrometer is mounted in a cooling or protective housing, remove the pyrometer from the
protective fitting. For easier focusing, hold the pyrometer parallel to the cooling or protective
fitting.
Pyrometer with through-the-lens sighting:
When aiming the pyrometer with through-the-lens sighting to a target, both the targeted object
and the target marker (distinctly marked circled or rectangle spot in the viewfinder) must appear
in sharp focus simultaneously.
Pyromter with camera:
The models PA xx AF xx /C features an integrated camera. When aiming the pyrometer focus
the sensing head until the video images is sharp.
Pyrometer with laser sighting:
The pyrometer models PA xx AF xx /L feature a laser spot light which can be activated to facili-
tate instrument alignment to the target spot.
To activate the laser, press the MODE button on the rear panel for 2 seconds.
Alternatively, the laser can be switched on with the interface.
To focus, rotate the optics until the pilot light is projected as a sharp, round light spot on the
object to be measured.
Pyrometer with fibre optic:
The pyrometers have a laser that can be activated to align the sensing head to the target spot.
To activate the laser, press the MODE button in the real panel for 2 seconds.
Alternatively, the laser can be switched on via the interface
For focal adjustment loosen the shown socket screw (hexagon socket screw DIN 916) with a
wrench (DIN 911) and shift the internal body of the tube towards the lens tube. Due to the O-ring
sealing between the internal body of the tube and the lens tube the focal adjustment must be
carried out very slowly so that the air pressure in the space between lens and internal body of
the tube can be be equalised.
1: For focussing solve screw

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To protect the laser against overload, an over temperature is provided. At temperatures above
60 °C, the laser switches of an can no longer be activated. To check, whether the laser is acti-
vated, the parameter LED lights up.
In normal operation, the laser is switch off. After activation, the laser switch of again after 2 – 15
minutes. The operator must be familiar with the pyrometer and above safety guidelines.
The activated laser pilot light can influence the measured temperature. This influence will
vary, depending on the instrument model and the temperature
If focusing is not possible during installation, focusing can also be done outside the plant.
To do this, set the pyrometer to the same distance as the distance between the pyrometer
and the pouring stream.
9 Parameterization
On delivery, the pyrometer is parameterized on a discontinuous pouring stream.
It is only necessary to change the parameters if the casting time is < 5 s
The start of a measuring cycle is automatically detected and depends on limit 1, limit 2 and the
dead time. Before starting the measurement, Limit 1 must have fallen below at least once. Limit
2 must be exceeded continuously for the duration of the dead time (T.DEL). If necessary, the
limits are to be adapted.
Two-colour channel [Qu] -> ATD function [Q.Atd]
Parameter Function Default
[LI.1]Limit 1 1100 °C
(LI.2)Limit 2 1200 °C
1: Measuring object in front of the pyrometer 4: Time delay [T.DEL]
2: Limit 2 [LI. 2] 5: Sampling time [T.ACT]
3: Limit 1 [LI. 1]
Quick Start Guide CellaCast PA 8x

Quick Start Guide CellaCast PA 8x
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9.1 Setting the sampling time at the PA 83
On delivery the pyrometer is parameterized on a discontinuous pouring stream. If the pouring
times are < 5 seconds the measuring time needs to be adapted.
The time delay (time after detection of the pouring stream up to the start of the measurement)
and the measurement time must be less than the minimum pouring time.
Two-colour channel [Qu] -> ATD function [Q.Atd]
Parameter Function Default
[T.DEL]Time delay [s] 1 s
(T.ACT)Sampling time [s] Auto
► Press [Mode] to access the main menu
> The display shows [Ao]
► Press the [▼] until [Qu] is displayed
► Press [Mode]
> The display shows [Q.EPS]
► Press [▼] until [Q.ATD] is displayed
► Press [Mode]
> The display shows [t.dEl]
► Press [▼] until [t.Act] is displayed
► Press [Mode]
> The current sampling time or [Auto] is displayed
► Press [▲ or ▼] for 2 second
> The display flashes three times
► Press [▲ or ▼] to set the desired sampling time
► Press [Mode] to confirm the parameter
Exit operation
► Wait 30 seconds
or
► Press [▲ or ▼] to change to the parameter [End]. Then Press [Mode] to change to the
functional menu.
► In the functional menu press [▲ or ▼] to change to the parameter [End], then press
[Mode].
If the time delay [T.DEL] must also be adjusted, proceed as described above. In this case the
parameter [T.DEL] must be selected and changed accordingly.
9.2 Setting the sampling time at the PA 80/81
The pyrometer is parameterized for continuous measurement on liquid metals.
The measuring time is set to 15 s in the delivery state. After the measuring time has expired, the
measured temperature is shown on the display or the analogue output. Afterwards, the measur-
ing time restarts automatically after the dead time has elapsed.

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Two-colour channel [Qu] -> ATD function [Q.Atd]
Parameter Function Default
[T.DEL]Time delay [s] 1 s
(T.ACT)Sampling time [s] 15 s
► Press [Mode] to access the main menu
> The display shows [Ao]
► Press the [▼] until [Qu] is displayed
► Press [Mode]
> The display shows [Q.EPS]
► Press [▼] until [Q.ATD] is displayed
► Press [Mode]
> The display shows [t.dEl]
► Press [▼] until [t.Act] is displayed
► Press [Mode]
> The current sampling time is displayed
► Press [▲ or ▼] for 2 second
> The display flashes three times
► Press [▲ or ▼] to set the desired sampling time
► Press [Mode] to confirm the parameter
Exit operation
► Wait 30 seconds
or
► Press [▲ or ▼] to change to the parameter [End]. Then Press [Mode] to change to the
functional menu.
► In the functional menu press [▲ or ▼] to change to the parameter [End], then press
[Mode].
Alternatively, the parameters can be set via IO-Link.
10 Adaptation of temperature level
By changing the emissivity ratio, the difference between the measured temperature level and
true temperature can be compensated.
For this purpose, a comparison measurement with an immersion lance is required. Adjust
emissivity ratio in such a way that the measured values coincide. An increase in the emissivity
ratio results in a low temperature value.
The graph shows an approximation of the influence of the emissivity ratio setting on the change
in temperature value.
Quick Start Guide CellaCast PA 8x

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1 Ratio correction
2 Temperature difference [°C]
Experience has shown that the following settings apply as a first approximation
- grey pig iron 101
- spheroidal graphite iron 104
However, these values may differ in practice. After changing the emissivity ratio, carry out a new
control measurement.
The emissivity ratio is set as follows:
► Press [▲ or ▼] for 2 seconds
> The value of the selected emissivity ration is displayed, for example [103.0]
► Press [▲ or ▼] until the desired emissivity ratio will show
► Release the [▲ or ▼] key
> The current temperature values is displayed and the new emissivity ration coefficient is
stored
Alternatively, the emissivity ratio can be set via IO-Link.
Quick Start Guide CellaCast PA 8x