METIS M308 / M309 / M313 / M316 / M318 / M323 / H309 / H316 / H318 (12-pin)
Configuring the Pyrometer
29
6.3.11 Customize Analog Output
(only via software
SensorTools
)
The analog outputs can be set independently of the temperature sub range. They can be set to range
limits between 0 and 6000°C or °F, even if the pyrometer does not cover these ranges.
Limit the analog output:
if the analog output is set smaller than the pyromete
r’s temperature range,
the resolution of the analog output is increased even further.
Enlarge the analog output:
Entering a larger range as the pyrometer’s range will scale the output.
The output at the beginning of temperature range is 0 or4 ma, at the
end of the pyrometer’s tempera-
ture range the current output is that corresponding to the enlarged temperature range.
Example:
A pyrometer with temperature range 750
–2500°C
should be adapted to the range 600
–3000°C. In the range
of 600
–750°C, the pyrometer cannot measure yet; it shows
– – – – or in the software “Under”. At the analog output (e.g.
set to 0
–20 mA) the output current is 0 mA as long as
750°C is reached, then 1.25 mA will be set to the output.
Same with the upper limiting temperature, from 2500°C the
current is consistently issued, a 600
–3000°C device would
display at 2500°C.
6.3.12 Interface Type
(only M3 devices)
Provides the interface to RS232 or RS485 (see
RS232 / RS485
)
6.3.13 Baud Rate
Serial Interface RS232 / RS485):
RS232: 4.8 to 115.2 kBd; RS485: 4.8 to 921.6 kBd
6.3.14 Address
In bus operation with RS485 an address between 00 and 97 can be assigned (
RS232 / RS485
).
Device addresses from 00 to 97 are valid. Addresses 98 and 99 are with special functions. The global
address 99 can be used to communicate with every controller, independent of the set device address.
This allows communication with devices with unknown addresses. The address 98 is a group address
used for RS485 devices in bus operation. With this address devices do not answer, useful to change
parameters of all connected devices at the same time.
6.3.15 Interface Delay / Answer Delay)
During operation of the pyrometer via RS485, it may happen that the connection is not fast enough to
detect the response of pyrometer time to a command from the master, e.g. because the line is still busy
with sending before receiving. This sometimes occurs in older PCs or interface adapters or by slow
switching times of interface adapters and manifests itself in transmission errors of interface commands,
so errors when parameters are changed or of measured values transmission.
In this case a delay for delaying the data transfer can be entered, the value specifies the main circulat-
ing time and can be set from 00-20. The transmission of commands to the pyrometer is thus somewhat
delayed, but it can work with existing peripherals.
6.3.16 Key Lock
Changing the parameters (PAR key) on the device can be deactivated or protected by entering a 4-digit
pin (settings on the device (from firmware 2017_01), see
Key func-
tions
or via software, see
Device Settings and Configuration
; only available at devices from
firmware version 2016_18; update firmware see section
). If activated, this pin must be entered before
parameters with the PAR button can be changed on the device.
0 mA
20 mA
600 750 2500 3000°C
1,25 mA
16,66 mA