9. Display and keypad
15
Special operating states and faults
Display segment test :
runs automatically after switch ON
Supply voltage
Display after segment test
Under 3.8 V :
LOBAT
arrow lights up
Relative measuring with respect to a reference value :
REL
arrow lights up
Checksum error in
device calibration :
Non-connected sensors,
deactivated measuring points :
Measuring range / function not permitted :
Multiplexer M5 (D-B) is not allowed:
Sensor
breakage
:
flashes
Outside of measuring range,
undershoots
cold junction compensation
flashes
or cold junction compensation breakage :
Overshoots values range (>65000) :
flashes
Overshoots measuring range :
Maximum value flashes
Undershoots measuring range :
Minimum value flashes
9.2
Keypad
To operate the device a keypad with 7
keys is provided :
Function
:
Key
To switch ON the device : (see Section 7.3)
ON OFF
To switch OFF the device :
ON
OFF
must be pressed and held down
Function :
Key
Selection of measuring points (see Section 10.1.1)
M
▲
or
M
▼
Displaying the maximum value : (see Section 10.2)
MAX
CALEr
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Err
NiCr
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