
Unit functions
RESM-5
Page 35
Rotary coding switch (as of August 2014)
The Configuration menu is not disabled as default
("0" position). If you set the rotary coding switch to "5",
the Configuration menu is disabled and you cannot
make any changes there.
If you change the setting of the rotary coding
switch, the new setting takes effect immedi-
ately. You do not need to switch the unit off and
then on again.
The following message is displayed for 5 seconds
when you open the Configuration menu to indicate that
this menu is disabled.
9.13
Display brightness
You can set the brightness of the OLED display in four
steps (25%, 50%, 75%, 100%) with the "UP" and
"DOWN" keys when the display is in the home position.
The factory setting is 75%.
The life of the OLED display can be extended by
reducing the brightness.
The "Screensaver" parameter in step 228 allows you to
automatically dim the display after a defined time (in
minutes). If no keys are pressed during this time, the
display is dimmed to 25% brightness. If you set "0min",
the display is not dimmed.
As soon as you press a key again or an alarm is
detected, the display returns to the programmed
brightness level.
9.14
Undervoltage detection
Trouble-free operation of the RESISTRON monitoring
device is guaranteed within the line voltage and 24
VDC supply voltage tolerances specified in section 5
"Technical data" on page 12.
If the line voltage drops below the permitted lower limit,
the RESISTRON monitoring device is switched to
standby mode. No more measurements take place and
the temperature is no longer monitored. The display
changes to indicate this.
The main menu is displayed and normal operation
resumed when the input voltage returns to the specified
tolerance range again.
The alarm output is not energized at undervoltage.
Standby mode is indicated by 0…3 °C (i.e. approx. 0V)
at the analog output.
Trouble-free operation of the unit is only
guaranteed within the specified tolerance
range of the input voltage. An external voltage
monitor
must
be
connected
to
prevent
malfunctions due to low line voltage.
9.15
Unit information
You can display information about the unit by pressing
the "ENTER" key when the display is in the home posi-
tion. The unit name appears together with the firmware
version, article number, and serial number. The display
0
5
1 2
3
4
6
7
8
9
0
5
1
2
3
4
6
7
8
9
Schalter-
position
0
5
Unlocked
Locked
Configuration menu
0 = Factory settings
SWITCH POS.
5
0
CONFIGURATION MENU
Locked
Unlocked
!
!