4 Transmitter
82
Message Display
Cause
Remedying of fault
02821
T process low** The process
temperature is below
the temperature
designated for the
probe
Take necessary
measures to raise
process temperature
0081C Alarm
1**
Depending on the
parameterization of the
relays
Depending on the
parameterization of the
relays
0081D Alarm
2**
Depending on the
parameterization of the
relays
Depending on the
parameterization of the
relays
0081E Alarm
3**
Depending on the
parameterization of the
relays
Depending on the
parameterization of the
relays
0081F Alarm
4**
Depending on the
parameterization of the
relays
Depending on the
parameterization of the
relays
02900
2-point
adjustment drift*
In the 2-point
adjustment, corrections
repeatedly occur in the
same direction; this may
indicate a sensor drift
Send the probe into
Testo Service
02806 Condensation*
100 % RH has been
reached, condensation
developing
Take measures to
reduce process
humidity
02807
Values less than
0 % RH**
The adjustment or
sensor is faulty
Check adjustment (via
P2A adjustment history,
perform 2-point
adjustment where
necessary). If the
problem persists,
contact Testo Service
02809
Sensor early
warning*
For testo 6617 probe
only: The cover
electrode of the sensor
is damaged; this may
soon cause the sensor
to break
Carry out visual
inspection. If the mirror-
like surface of the
sensor is dirty or
damaged, contact
Testo Service
* Early warning
** Current malfunction
1.800.561.8187
www.
Testo-Direct
.ca
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