IntelliPack Series 801T Transmitter/Alarm User's Manual mV/TC/RTD Input
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In this case, use the Acromag IntelliPack Configuration Software
to reconfigure the module and this will usually cure the problem.
If the diagnostics continue to indicate a problem (a continuously
flashing green LED), or if other evidence points to a problem with
the unit, an effective and convenient fault diagnosis method is to
exchange the questionable module with a known good unit.
The IntelliPack Serial Port Adapter also contains a red LED
visible at the small opening in the enclosure to the right of the
RJ11 receptacle. If this LED is OFF or Flashing and power is
ON, then a communication interface problem exists. Note that
the adapter receives its power from the IntelliPack module. A
constant ON LED indicates a properly working and powered
serial interface adapter.
Acromag’s Application Engineers can provide further
technical assistance if required. When needed, complete repair
services are available from Acromag.
6.0 SPECIFICATIONS
General:
The IntelliPack Model 801T-0500 is a DC-powered
transmitter which conditions either a single thermocouple,
RTD, millivolt, or resistance input, and provides an isolated
voltage or current output. Isolation is supplied between the
sensor input, the output, and power. The 801T-1500 also
includes a SPDT, Form C, electromechanical relay, which
provides a local limit alarm function with isolated relay
contacts. This transmitter/alarm is DIN-rail mounted.
The unit is configured and calibrated with our user-friendly
Window 95
or NT
IntelliPack Configuration Program.
Push-buttons on the module allow adjustment to the zero and
full-scale points for the transmitter, plus setpoint and
deadband adjustment for modules with the alarm option.
Non-volatile reprogrammable memory in the module stores
calibration and configuration information.
MODEL NUMBER DEFINITION
Transmitters are color coded with a white label. The prefix
“8” denotes the IntelliPack Series 800, while the “T” suffix
specifies that this device is primarily a process transmitter.
801T:
Transmits and isolates a single DC millivoltage,
Thermocouple (TC), or Resistance Temperature Detector
(RTD) Input.
-X500:
The four digits of this model suffix represent the following
options, respectively:
X = 1 with Alarm Relay, X = 0 without Alarm Relay;
5 = Output: Transmitter Voltage or Current;
0 = Enclosure: DIN rail mount;
0 = Approvals: cULus Listed.
INPUT SPECIFICATIONS
Unit must be wired and configured for the intended input type
and range (see Installation Section for details). The unit can be
configured to accept any one of the input types described using
the IntelliPack Configuration Program. The following paragraphs
summarize this model’s input types, ranges, and applicable
specifications.
RTD:
User configured to one of four RTD types noted in Table 4
below. Module provides sensor excitation, linearization, lead-
wire compensation, and sensor break detection.
Input Reference Test Conditions:
Pt RTD 0
C to 100
C, Ni
RTD 0 to 50
C, Cu RTD 0 to 250
C; Ambient Temperature =
25
C; Power Supply = 24V DC; Alarm Delay = 200ms.
Input Configuration:
Two, three, or four-wire (Kelvin or
compensation loop).
Excitation Current:
1mA DC typical, all types.
Linearization:
Better than
0.25
C, typical.
Lead-Wire Compensation:
Inherent for 3 wire and 4 wire
RTD’s. The maximum lead resistance is 25
per lead (Pt),
20
per lead (Ni), 10
per lead (Cu). All lead wires must be
of equal size and length.
Lead Resistance Effect:
3.5
C per
of unbalance, typical
(Pt), 1.4
C per
of unbalance, typical (Ni), 25.5
C per
of
unbalance, typical (Cu),
Break Detection
: RTD sensor failure can be configured for
either upscale or downscale detection.
Table 4: RTD Types, Ranges, and Accuracy
RTD Type
1
Alpha
C
Range
Typical
Accuracy
Pt 100
(IEC751
Amendment 2:1995)
1.385
-200 to
+850
C
0.25
C
Pt 100
(Old JIS 1981)
1.3911
-200 to
+850
C
0.25
C
Ni 120
(Minco 7-120)
1.6720
- 80 to
+320
C
0.25
C
Cu 10
(Minco 16-9)
1.4272
-200 to
+260
C
1.00
C
Resistance (Linear)
2
1.000
0-500
2
0.05
Notes (Table 4):
1. Alpha (
) is used to identify the particular RTD curve.
The value of alpha is derived by dividing the resistance of
the sensor at 100
C by the resistance at 0
C (
=
R
100
C
/R
0
C
). For Pt 100
, this is 138.5
/100.0
, or
1.385 (also shown as 0.00385
/
/
C).
2. The linear resistance input range approaches 0
, but
does not include 0
. If exactly 0
is measured, the
selected break detection is triggered.
Thermocouple
: User configured for eight types of
thermocouples as shown in Table 5. Supports J, K, T, R, S,
E, B, and N thermocouple types. Linearization, cold-junction
compensation (CJC), and open circuit or lead break detection
is included.
TC Input Reference Test Conditions:
15.6mV input range
and 10mV spans (e.g. Type J at 186
C); Ambient
Temperature = 25
C; Power Supply = 24V DC, Alarm Delay =
200ms.
TC Input Bias Current
: ±25nA typical (TC break).
