5
TRM138
Section 2
Technical Characteristics
The general characteristics of the TRM138 instrument are presented in Tables 1, 2, 3.
Table 1
General characteristics
Description
Value
Power supply voltage range
90...245 V alternate/direct current (47...63 Hz)
Power consumption
not greater than 12 VA
Number of measurement channels
1…8
Interrogation time per one channel
not longer than 0.6 sec
Number of control channels
1…8
Number of output devices
8
Voltage of active transducers
24±3 V direct current (150 mA max)
Computer communications interface
RS485
Casing protection rating (from the front panel)
IP54
Overall dimensions
96х96х140 mm
Weight
not greater than 1.5 kg
Table 2
Input sensing devices
Description and NSC
Measurement range Resolution Basic reduced error limit
Resistive temperature transducers according to the State Standart (GOST) R 665194
Cu 50М W
100
= 1.426
–50 ... +200 °С
0.1 °С
Cu 50М W
100
= 1.428
–190 ... +200 °С
0.1 °С
Cu 100М W
100
= 1.426
–50 ... +200 °С
0.1 °С
Cu 100М W
100
= 1.428
–190 ... +200 °С
0.1 °С
0.25 %
Pt 50P W
100
= 1.385
–200 ... +750 °С
0.1 °С
Pt 50P W
100
= 1.391
–200 ... +750 °С
0.1 °С
Pt 100P W
100
= 1.385
–200 ... +750 °С
0.1 °С
Pt 100P W
100
= 1.391
–200 ... +750 °С
0.1 °С
According to the State Standart GOST 665178
Cu gr. 23
–50 ... +200 °С
Thermocouples according to the State Standart (GOST) R 8.5852001
L
–50 ... +750 °С
0.1°С
J
–50 ... +900 °С
0.1°С
N
–50 ... +1300 °С
1 °С
К
–50 ... +1300 °С
1 °С
0.5 %
S
0 ... +1750 °С
1 °С
R
0 ... +1750 °С
1 °С
А1
0 ... +2500 °С
1 °С
Direct voltage and current signals according to the State Standart (GOST) 26.01180
0 … 5 mA
0 … 100 %
0.1 %
0.25 %
0 …20 mA
0 … 100 %
0.1 %
4 …20 mA
0 … 100 %
0.1 %
0 …50 mV
0 … 100 %
0.1 %
0 …1 V
0 … 100 %
0.1 %
Notes.
1. W
100
– ratio of the transducer’s resistance measure d at 100 °C to its resistance measure d at 0°C.
2. Only insulated thermocouples with unearthed measuring junctions can be used for operation with the device.