IKA RET control Operating Instructions Manual page 31

„Watchdog" function, monitoring the serial data flow
The following applies to situations where the watchdog function is
enabled (see Namur instructions). If no new transmissions of these
commands from the PC take place within the preset watchdog
time, the heating and stirring functions will be shutdown according
to the watchdog mode selected or will be controlled using the
preset setpoints.
An operating system crash, a PC power failure or a fault in the
connecting cable to the RET control can cause an interruption in
data transmission.
"Watchdog"– Mode 1
If an interruption in data transmission occurs which is longer than
the preset watchdog time, the heating and stirring functions will
be shutdown and the error message ER 2 will be displayed.
"Watchdog"– Mode 2
If an interruption in data transmission occurs which is longer than
the preset watchdog time, the speed setpoint value will be set to
the WD safety speed setpoint and the temperature setpoint will
be set to the WD safety temperature setpoint. Actually the device
would display ER 2 the same as WD1.
Accessories
• Magnetic stirring bars:
ø 6mm; max. length 15 mm
ø 7mm; max. length 60 mm
ø 10mm; max. length 80 mm
• RS 1 Set of stirring bars
• RSE PTEE-stirring bar remover,
• H 1000 Bath attachment
• H 1500 Bath attachment
• H 3000 Bath attachment
• H 5000 Bath attachment
• H 8000 Bath attachment
• H 135.3 Carrier plate
• H 135.310 Quarter 20ml
• H 135.311 Quarter 30ml
• H 135.312 Quarter 40ml
• H 135.313 Quarter 4ml
• H 135.314 Quarter 8ml
• H 135.315 Quarter 16ml
Faults
The unit displays an error by an error number „Er X" (see error
table) in the display.
The heating will be powered down (exeption: WD -see table).
Following a fault in the heating circuit, the stirring function will
continue to operate at the speed set before the fault took place
(exception: WD - see table).
To reset a fault, switch off the unit at the main ON/OFF switch for
a few seconds. The unit should remain off long enough for the
temperature to settle. (The residual heat display must be OFF. See
the residual heat display).
When the unit is switched on again, the safety circuit test is run
within 20 seconds. After this the other test/monitoring functions
are enabled.
1l
1,5l
3l
5l
8l
Connections between RET control and external
devices
The RET control unit can be connected to other external devices
using the following IKA adapters and adapter cables.
PC 2.1 Cable
Cable PC 2.1 for connection to the 9-pin socket on the computer.
1
6
2
7
3
8
4
9
5
1
RxD 2
TxD 3
magnetic stirrer
Magnetrührer 4
= plug GND 5
= Stecker
6
RTS 7
CTS 8
9
• H 135.4 Reaction block round flask 100ml
• H 135.410 Insert round flask 10ml
• H 135.411 Insert round flask 25ml
• H 135.412 Insert round flask 50ml
• H 135.5 Reaction block round flask 500ml
• H 135.510 Insert round flask 200ml
• H 135.511 Insert round flask 250ml
• H 135.512 Insert round flask 300ml
• H 135.6 Reaction block round flask 1000ml
• H 135.610 Insert round flask 500ml
• H 16 V Support rod
• H 16.1 Extension
• H 38 Holding rod
• H 44 Boss head clamp
• PT1000.50 Temperature sensor
• PT1000.51 Temperature sensor glass-coated
See more accessories on www.ika.com
If the fault will not clear, you must run a RESET cycle (see
menu point „Settings")!
If a RESET cycle does not clear the fault, take the unit to your
technical service center.
5
9
4
8
3
7
2
6
1
1
2 RxD
3 TxD
PC (computer)
4 PC (Rechner
5 GND
= socket
= Buchse
6
7 RTS
8 CTS
9
31