EN/07.2013/58/65
4.16. Offset correction
The parameters involved are:
• I02 CHANNEL OFFSET T1: pre-set = 0°C
• I03 CHANNEL OFFSET T2: pre-set = 0°C
• I04 CHANNEL OFFSET T3: pre-set = 0°C
• I05 CHANNEL OFFSET T4: pre-set = 0°C
• I06 CHANNEL OFFSET IC1: pre-set = 0%
• I07 CHANNEL OFFSET IC2: pre-set = 0bar
• I08 CHANNEL OFFSET IC3: pre-set = 0%
• I09 4mA VALUE FOR An-In IC1: pre-set = 0%
• I10 20mA VALUE FOR An-In IC1: pre-set = 30%
• I11 4mA VALUE FOR An-In IC2: pre-set = 0bar
• I12 20mA VALUE FOR An-In IC2: pre-set = 100bar
• I13 4mA VALUE FOR An-In IC3: pre-set = 0%
• I14 20mA VALUE FOR An-In IC3: pre-set = 30%
The parameters from I02 to I08 add an offset to the correspondent probe reading.
The procedure to set the correct offset is the following:
1. Read on the display the value of analog channel that you want to calibrate;
2. Measure with a reference instrument the effective value;
3. Calculate the offset as ‘effective value’ - C2020 reading’;
4. Set the correspondent offset parameter with the value calculated above.
The parameters from I09 to I14 set for each analog input the extreme points of their range:
1. The 4mA value is the lowest one of the range (at 4mA);
2. The 20mA value is the greatest one of the range (at 20mA).
For example, if the probe connected at IC1 analog channel has a range as: -5bar at 4mA and 10bar at 20mA, the
parameters of this channel will be set so:
• I09 4mA VALUE FOR An-In IC1 = -5bar;
• I10 20mA VALUE FOR An-In IC1 = 10bar.
4.17. Locked keypad
The parameters involved are:
• M129 KEY LOCK ENABLE: pre-set= NO;
• M191 PASSWORD USER SETUP: pre-set= 0
When M129 is set to YES and no key is pressed for three minutes out of the menus or it’s pressed the SET-ESC-SET
keys in this order by 2 seconds from the starting of sequence, the keypad will be lock. To unlock the keypad it’s necessary
to press the SET-ESC-SET keys in this order by 2 seconds from the starting of sequence. After this sequence, if M191
is different from zero it’s necessary enter the USER password to unlock the keypad. After the key sequence, if M191 is
equal to zero, the keypad will immediately unlock. When the keypad is locked, any action on the keys has no effect. If the
parameter M129 is set to NO, it will be impossible to lock the keypad.
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