5. DISPLAY AND KEYPAD
5.1 Display
The display (1) of the instrument ALMEMO
®
4490-2 consists of a 6-digit LED
display plus a minus sign. The first four digits indicate the measuring or
programming value including the sign. The following two alphanumeric digits
indicate the dimension in case of a measured value, or the selected function
(see 6.1). In case of values exceeding 9999 an automatic decimal point switch
is performed, so the last digit will disappear.
Special Operating Conditions
Segment test of the display automatically after switching on.
Sensors that are not connected,
de-activated measuring points,
cleared programming values.
Alarm Conditions
are displayed as follows and cause an alarm (see man. 6.3.9):
Sensor breakage:
N
i
C
r
°
C
abbrev. flashes
Exceeding of limit value:
A1
or
A2
is illuminated
Overshooting of measuring range:
A1
illuminated, max value flashes
Undershooting of measuring range:
A2
illuminated, min value flashes
Undershoot. of meas. range CJ compens. (cold junction)
Meas. without ext. CJC or CJC breakage: flashes
Exceeding of range of values (>65000):
flashes
6
5
0
0
°
C
-
-
-
-
C
J
°
C
14
ALMEMO
4490-2
Display and Keypad
