IKA RET control-visc - Manual (Page 32)

32
“Watchdog” functions; monitoring of the serial data flow
If, once this function has been activated (see NAMUR commands),
there is no retransmission of the command from the computer
within the set time (“watchdog time”), the heating and stirring
functions are switched off in accordance with the set “watchdog”
function or are changed to the set target values.
The data transmission may be interrupted by, for example, a crash
in the operating system, a power failure in the PC or an issue with
the connection table between the computer and REC control.
“Watchdog” - mode 1
If there is an interruption in data communications (longer than
the set watchdog time), the heating and stirring functions are
switched off and ER 2 is displayed.
“Watchdog” - mode 2
If there is an interruption in data communications (longer than
the set watchdog time), the speed target value is changed to
the WD safety speed limit and the temperature target value is
changed to the WD safety temperature limit value. The warning
WD is displayed.
Connection possibilities between the RET control
and external devices
The following adapters and adapter cables are available from IKA ®
for connecting the RET control to external devices.
PC 1.1 cable
The PC 1.1 cable is used to connect the 9-pin plug to a computer.
Accessories
Troubleshooting
The device will indicate that there is a fault by displaying an error
message “Er X” (see table) on the screen.
Heating will be switched off permanently (exception: WD - see
table).
The stirring function continues to operate at the pre-set speed if
there is a fault in the heating circuit (exception: WD - see table).
In order to reset the device after a fault, it may need to be discon-
nected from the power supply for several seconds. The period the
device is switched off may also need to be longer if the tempera-
tures need to be counterbalanced (residual heat display may no
longer be active; see “Residual heat display”).
The safety circuit test takes place within 20 seconds of switching
on the device; after the test, the other monitoring functions are
activated.
If a fault cannot be eliminated directly, you must perform a
RESET (see “Settings” menu). If the faults still cannot be elimi-
nated, the appliance must be inspected by a technical service
technician.
• Magnetic rods:
ø 6 mm; max. length 15 mm
ø 7 mm; max. length 60 mm
ø 10 mm; max. length 80 mm
• RS 1 Set of magnetic stirring bars
• RSE Stirring bar remover
• H 1000 Beaker 1 l
• H 1500 Beaker 1.5 l
• H 3000 Beaker 3 l
• H 5000 Beaker 5 l
• H 8000 Beaker 8 l
• H 135.3 Flask carrier
• H 135.310 Quarter 20 ml reaction vessel
• H 135.311 Quarter 30 ml reaction vessel
• H 135.312 Quarter 40 ml reaction vessel
• H 135.313 Quarter 4 ml reaction vessel
• H 135.314 Quarter 8 ml reaction vessel
• H 135.315 Quarter 16 ml reaction vessel
• H 135.4 Reaction block for 100 ml round flask
• H 135.410 Insert for 10 ml round flask
• H 135.411 Insert for 25 ml round flask
• H 135.412 Insert for 50 ml round flask
• H 135.5 Reaction block for 500 ml round flask
• H 135.510 Insert for 200 ml round flask
• H 135.511 Insert for 250 ml round flask
• H 135.512 Insert for 300 ml round flask
• H 135.6 Reaction block for 1,000 ml round flask
• H 135.610 Insert for 500 ml round flask
• H 16 V Support rod
• H 16.1 Extension
• H 38 Holding rod
• H 44 Boss head clamp
• PT100.50 Temperature sensor
• PT100.51 Temperature sensor, glass coated
• PT1000.50 Double temperature sensor
• PT1000.51 Double temperature sensor, glass coated
for further accessories see www.ika.com.
1
RxD 2
TxD 3
4
GND 5
6
RTS 7
CTS 8
9
PC
1
2
3
4
5
6
7
8
9
1
2 RxD
3 TxD
4
5 GND
6
7 RTS
8 CTS
9
5
4
3
2
1
9
8
7
6