Instruction Manual PUC 28
20
Fig. 13: Switching points of the relay considering hysteresis
Example: With an upper limit of 100 and a hysteresis of 10, the alarm is triggered at 105 and
reset again at 95.
Input / sensor
Value
Range of values
Default setting
Internal pressure
VALUE TOP
-120 ... +120 Pa *
-300 ... +300 Pa **
+100 Pa * / +250 Pa **
VALUE BOT
-120 ... +120 Pa *
-300 ... +300 Pa **
-100 Pa * / -250 Pa **
HYST
0 ... 50 Pa
0 Pa
IN 1-T
VALUE TOP
-800 ... +800 °C
60 °C
VALUE BOT
-800 ... +800 °C
5 °C
HYST
0 ... 100 °C
0 °C
IN 1-P
VALUE TOP
-300 ... +300 Pa
+100 Pa * / +250 Pa **
VALUE BOT
-300 ... +300 Pa
-100 Pa * / -250 Pa **
HYST
0 ... 125 Pa
0 Pa
IN 2-H
VALUE TOP
0 ... 800 %rH
75 %rH
VALUE BOT
0 ... 800 %rH
0 %rH
HYST
0 ... 50 %rH
0 %rH
IN 2-P
VALUE TOP
-300 ... +300 Pa
+100 Pa * / +250 Pa **
VALUE BOT
-300 ... +300 Pa
-100 Pa * / -250 Pa **
HYST
0 ... 125 Pa
0 Pa
Table 15: Limits parameter description
* Value applies to a PUC 28 with an internal ±100 Pa sensor
** Value applies to a PUC 28 with an internal ±250 Pa sensor
Please make sure that the VALUE TOP is larger than the VALUE BOT. If both
new values are positive, the upper value must be set first. If both new values are
negative, the lower value must be set first (always assuming that the old values
have been according the delivery state). In case it is tried to enter a value for the
upper value which is equal or lower than the actual lower value, the entered
value is set to the actual lower value, increased by 0.1 Pa (°C, %rH). In case it is
tried to enter a value for the lower value which is equal or higher than the actual
upper value, the entered value is set to the actual upper value, decreased by 0.1
Pa (°C, %rH). The calculated value will then be shown in the display for further
editing, the value won’t be stored yet.