Model TT231-0600
Two-Wire RTD Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880
- 35 - http://www.acromag.com
- 35 -
http://www.acromag.com
SPECIFICATIONS
Model Number
Model TT231-0600
Signal Transmitter
Non-Isolated RTD Input
Two-Wire Loop-Powered
CE Approved
Includes UL/cUL Class 1, Division 2
approvals
Custom calibration to your
specifications can be added as a
separate line item at time of
purchase.
The TT231 model prefix denotes a non-isolated RTD input type of the DIN-Rail
Mounted Series 230 “Thin Transmitter” family. The trailing “-0600” model suffix
denotes 2-wire loop power with CE and UL/cUL Class 1, Division 2 Approvals.
Optional factory calibration to your own specifications is ordered as a separate line
item at time of purchase, and on a per unit basis. Factory calibration requires pre-
selection of input type (Pt RTD or Resistance), sensor wiring (2-wire or 3/4-wire),
Input Zero Value (-50°C, 0°C, or 0°F for Pt RTD, or Ohms for Resistance), Input Full-
Scale (up to 850°C/1562°F or 900Ω), and Sensor Fault Detent (Upscale or
Downscale). You can obtain form 8500-858 for specifying this calibration from our
web site at www.acromag.com.
The standard model without adding custom factory calibration is calibrated by
default for Pt100 RTD, α=0.00385
/
/
C, 3-wire, 0°C to 200°C input, 4 to 20mA
output, and upscale fault detection.
Recalibration of any model will require use of an TTC-SIP configuration kit ordered
separately (see Accessories).
Models can be mounted on standard “T” Type DIN rail.
Input
Reference Test Conditions:
100Ω Pt RTD, α=0.00385
/
/
C; 0
C to 200
C input;
Output 4-20mA; Upscale break detection; Ambient = 25
C; Power Supply = 24V DC;
R-Load = 250
.
Input Ranges & Accuracy:
Configurable for 100Ω Platinum RTD from -50°C to
+850°C, or for linear resistance from 0Ω to 900Ω, as shown in Table 1 below.
Accuracy is dependent on the calibrated range as shown. It is generally better than
±0.1% of span for ranges below 500°C and spans greater than or equal to 50°C. For
the Platinum RTD input type, linearity and accuracy has been optimized for
calibrated spans within the region of -50° to +500°C. Accuracy is degraded for input
spans less than 50°C, and output spans less than 16mA. Unit provides sensor
excitation, linearization, lead-wire compensation (3-wire), and sensor fault/lead
break detection. Consult factory for 1000Ω Pt RTD support.
Table 1: Input RTD Ranges and Accuracy
Input Type
Alpha
1
C or Ω Spans in Range
Typ Accuracy
3
Pt385 100
1.385
-50°C up to 250°C
<
0.05%
(IEC751 Amendment
-50°C up to 251-500°C
<
0.1%
2:1995)
-50°C up to 501-850°C
<
0.2%
Pt3911 100
1.3911
-50°C up to 250°C
<
0.05%
(Old JIS 1981)
-50°C up to 251-500°C
<
0.1%
-50°C up to 501-850°C
<
0.2%
Resistance (Linear)
2
1.000
0-900
2
<
0.1%