Application Errors Without Messages - Endress+Hauser iTEMP HART TMT162 Bedienungsanleitung

Trouble-shooting
88
< ≈ 10 kΩ
TC
off ---
on ---
1) On very high ambient temperatures a 3 x measured value deviation from the specification is possible.
The sensor resistance can influence the resistance shown in the tables. On simultaneous increase of
all sensor connection cable resistances the values indicated in the tables can be divided by two.
In corrosion detection it has been assumed that this is a slow process with a continuous increase in
resistance.
9.2.2 Monitoring the supply voltage
If the required supply voltage is undershot, the analog output value drops ≤ 3.6 mA for approx. 3 s.
Error code 19 appears on the display. Afterwards, the device tries to output the normal analog
output value again. If the supply voltage remains too low, the analog output value drops again
to ≤ 3.6 mA. This prevents the device from continuously outputting an incorrect analog output
value.
9.3

Application errors without messages

9.3.1 General application errors
Error
No communication
9.3.2 Application errors for RTD connection
Pt100/Pt500/Pt1000/Ni100
Error
Fault current
(≤ 3.6 mA or ≥ 21 mA)
10 kΩ ≈ < x < ≈ 15 kΩ
WARNING
ALARM
Cause
No power supply on the 2-wire circuit
250 Ω communication resistor is missing
Power supply too low (<10.5 V or 8 V
without display with jumper J3)
Defective interface cable
Defective interface
Defective device
Cause
Defective sensor
Incorrect connection of RTD
Incorrect connection of the 2-wire cable
Faulty setup of the device (number of wire
connections)
Setup
Defective device
> ≈ 15 kΩ
1)
ALARM
ALARM
Action/Remedy
Connect the cables correctly according to
the connection schematic (polarity)
®
See chapter 4.3.1 "HART connection"
Check power supply
Check interface cable
Check PC interface
Replace device
Action/Remedy
Check sensor
Connect cables correctly to terminal
schematic
Connect cables correctly to terminal
schematic (polarity)
Change device function SENSOR
CONNECTION
Incorrect sensor type set up under device
function SENSOR TYPE;
correct setup to correct type
Replace device
Endress+Hauser
TMT162