Endress+Hauser iTEMP HART TMT162 Bedienungsanleitung Seite 94

Technical data
2) When operating conditions are based over a large temperature range, the TMT162 offers you the ability to do a split range. For example a Type S or R thermo-
couple can be used for the low range and a Type B can be used for the upper range. The TMT162 is then programmed by the end user to switch at a prede-
termined temperature. This allows for utilization of the best performance from each individual thermocouple and provides 1 output that represents the process
temperature. Note the dual sensor option must be requested when placing an order.
3) Basic requirements NE 89:
Detection of increased wire resistance (e.g. corrosion of contacts or wires) of TC or RTD/4-wire. Warning - exceeding ambient temperature.
Output signal
Signal on alarm
Load
Linearization/
transmission behavior
Filter
Current consumption
Protocol-specific data
94
10.0.2 Output
Analog output
Signal encoding
Data transmission rate
Galvanic isolation
Breakdown information to NAMUR NE 43
Breakdown information is created when the measuring information is invalid or not present
anymore and gives a complete listing of all errors occuring in the measuring system.
Under ranging
Over ranging
Failure, e. g. sensor break; sensor short circuit
1) The high alarm is adjustable between 21.6 mA and 23 mA allowing for flexibility when working with the
requirements of most control systems.
R = (U - 11 V) / 0.023 A (current
b max. b max.
output)
Temperature linear, resistance linear, voltage linear
1st order digital filter: 0 to 60 s
• 3.6 mA to 23 mA
• Min. current consumption ≤ 3.5 mA
• Current limit ≤ 23 mA
Version
Device address in multi-drop mode
Write lock
4 to 20 mA, 20 to 4 mA
FSK ± 0.5 mA via current signal
1200 baud
U = 2 kV AC (input/output)
linear drop from 4.0 to 3.8 mA
linear rise from 20.0 to 20.5 mA
≤ 3.6 mA ("low") or ≥ 21 mA ("high") can be selected
W
Load ( )
1261
1011
250
0
11 V
Supply voltage (V DC)
5
Software setting
Write lock activated by hardware or software setting
TMT162
16.75 V 34.25 V
40 V
Endress+Hauser
1)
U
b
A0010971-EN