Universal Input
All of the Tracker 220 series can be directly connected to most process sensors including thermocouples, RTDs, 20mA loops, transmitters, or DC type signals. Thermocouple, RTD, 20mA, mV and 10 volt signals are accepted as standard. All thermosensor ranges have built-in Linearization curves with automatic or external cold junction compensation. The display can show °C, °F or Kelvin (Absolute), with the decimal point position being user-adjustable to give the required measurement resolution or switched to automatic (Auto-ranging Mode). The sensor break detection can be selected to produce upscale or downscale readings. Process inputs can be scaled to any engineering unit and can be linear, mapped to one of the thermosensor Linearization curves or be user linearised using the 24-point user Linearization feature.

Sensor Excitation
All Tracker 220 models are fitted with a fixed 24 volt DC output that is electrically isolated. This can be used to power a single 20mA 2-wire transmitter. In addition the Tracker models 221 and 222 have a 10V regulated supply and the Tracker models 223 and 224 are fitted with a programmable 0-12 volt DC regulated output. Both the fixed 10V and programmable 0-12V DC supply outputs are primarily designed to power strain gauge-type sensors including load cells.

Connectivity
Digital status inputs, serial communications, analog output, transmitter supply, alarm relays and transducer supply, are all available. The instrument can be removed for routine servicing without disturbing these connections.

Analog Output
Models 223 and 224 are fitted with an electrically isolated analog output which can be configured as 0-10 volt, 0-20mA or 4-20mA and can be scaled over any portion of the display range. For example, a type K thermocouple can be retransmitted as a linear 4-2 mA signal equivalent to 0-1000°C to another device such as a chart recorder or data logger. The output is linear to temperature (display value). The analog output can be set to transmit the measured (PV) value or the maximum, minimum or the averaged value and has its own damping filter for noisy or fast moving signals. Alternatively the output can be controlled by the serial communication interface.

User Linearization
Some applications require a special Linearization curve to be defined by the user. A typical example is tank contents measurement where the pressure of a liquid can be measured, but does not have a linear relationship to the actual volume. User Linearization allows up to 24 calibration points to be defined. Each point can be entered manually or, for greater accuracy, directly from the sensor output, thus removing measurement errors. The 24 readings can be entered in any order. The Tracker 220 will use the stored values to define the required Linearization curve.

Alarms
Each of the Tracker 220 series has 4 software alarms. These can be configured by the user for alarm type, setpoint, on/off delay and on/off hysteresis value. Alarms can be individually set to be latching or non-latching and to flash a message on the front panel display when active. Any of the 4 software alarms can operate a relay (models 222 and 224 only). In addition, a special AND function allows a relay to switch only if 2 or more alarm conditions are active. Relays can be configured to be energised or de-energised in the alarm condition.

Front Panel Control
Full setup is available using the front panel buttons to step through a simple password protected menu. Some functions, such as alarm setpoints, can be made directly available to an operator. Alternatively, units can be supplied without front panel buttons.

User Definable Buttons
Two of the front panel buttons can be user programmed to provide one or more special functions such as tare and zero.

Serial Communications
Both models 223 and 224 are fitted with an electrically-isolated RS 422/485 serial interface. Models 221 and 222 RS485 2-wire communications. All measured values and setup parameters are accessible, however, the instruments can be set to be read only, thus protecting their configuration. Two protocols are available, namely the MODBUS and the proprietary DTPI, which has been designed to be easier to implement. The display, analog output and transducer supply can all be set or configured via the serial interface.

Universal Power Input
Wide-ranging 90-265V AC input allows world-wide installation. Low voltage AC/DC input option available.

Tough but Attractive
Designed to enhance the looks of any instrument panel, the enclosure uses flame retardant (VO) materials and the front panel conforms to IP65 (NEMA 4). The plug in sleeve type construction facilitates simple exchange for routine servicing / calibration.

Clear Display
The flat recessed display, together with high brightness red or green LEDs ensure maximum visibility even in difficult ambient lighting conditions.

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Selection Chart

							Accuracy including linearization
			221	222	223	224	Worst case	Typical @ 25°C
THERMOCOUPLES
Type J	Fe/NiCu	-210 to 1200°C					± 0.5°C	± 0.2°C
Type K	NiCh/NiAl	-270 to 1372°C					± 0.5°C	± 0.2°C
Type T	Cu/CUNi	-270 to 400°C					± 0.5°C	± 0.2°C
Type B	Pt30%/6%Rh	0 to 1820°C					± 1.5°C	± 0.8°C
Type E	NiCh/CuNi	-270 to 1000°C					± 0.5°C	± 0.3°C
Type N	Nicrosil-Nisil	-200 to 1300°C					± 0.5°C	± 0.3°C
Type R	Pt13%-RhPt	-50 to 1767°C					± 1.0°C	± 0.6°C
Type S	Pt10%-RhPt	-50 to 1767°C					± 1.0°C	± 0.6°C
Type U	Cu/CuNi	-200 to 400°C					± 0.7°C	± 0.4°C
Type L	Fe/Con	-200 to 900°C					± 0.7°C	± 0.4°C
Type G	W/W26%Rh	0 to 2320°C					± 1.0°C	± 0.4°C
Type D	W3%/26%Rh	0 to 2320°C					± 1.0°C	± 0.4°C
Type C	W5%/26%Rh	0 to 2320°C					± 1.0°C	± 0.4°C
Ni/Ni 18% Moly		0 to 1370°C					± 1.0°C	± 0.4°C
Platinel II		0 to 1370°C					± 1.0°C	± 0.4°C
Palaplat		0 to 240°C					± 1.0°C	± 0.4°C
RESISTANCE THERMOMETERS
Pt100 (alpha=385)		-200 to 850°C					± 0.5°C	± 0.2°C
Pt100 (alpha=392)		-100 to 457°C					± 0.5°C	± 0.2°C
Pt130		-200 to 500°C					± 0.5°C	± 0.2°C
Ni100		-60 to 250°C					± 0.5°C	± 0.2°C
DC INPUT TYPES
± 20mA							± 0.05°C	± 0.02°C
± 100mV							± 0.05°C	± 0.02°C
± 10V							± 0.05°C	± 0.02°C
RESISTANCE 0-400 Ohms							± 0.4Ω	± 0.2Ω
0-4000 Ohms using 10V Input							± 0.5%	± 0.3%
DISPLAY DIGITS			4	4	5	5
°C, °F, or KELVIN
USER LINEARIZATION
DISPLAY FILTER
MATH FUNCTIONS
MAX, MIN, and AVERAGING
INTERNAL OR EXTERNAL CJC
2 x FUNCTION BUTTONS
4 x SOFTWARE ALARMS
24V TRANSMITTER SUPPLY
10V TRANSDUCER SUPPLY
0-12V TRANSDUCER SUPPLY
RS422/485 SERIAL INTERFACE
DIGITAL STATUS INPUTS
TWO ALARM RELAYS
ANALOG OUTPUT

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Technical Specifications

Display
Type: 14.2mm high brightness LED (red or green)
Range: -19999 to 99999 (T223, T224) or -1999 to 9999 (T221, T222)
Update Rate: 2 per second

A/D Converter
Dual slope integrating with auto zero
Conversion rate: 10 per second
Resolution: 16 bit + sign (1μV)
Common mode Rejection: >150dB
Series mode Rejection: >70dB (50 or 60 Hz)

Voltage Inputs
Ranges: ± 100mV, ± 10V
Accuracy: 0.05% of reading ± 20μV (typically 0.02%)
Resolution: 1μV (100mV range), 100μV (10V range)
Input Impedance (Ohms): >100M (mV i/p), >1M (V i/p)

Current Input
Range: ± 20mA
Accuracy: 0.05% of reading ± 4μA (Typically 0.02%)
Resolution: 2.0μA
Input Impedance: 5 Ohms typical
Maximum Burden: 100mV

Reference Junction Compensation (CJC)
Accuracy: better than ± 0.5°C after 30 minutes

Resistance/RTD Inputs
Configuration: 2, 3, or 4 wire programmable
Excitation Current: 0.25mA typical
Range: 0-400 Ohms (0-4K Ohms using 10V input)
Accuracy: 0.4 Ohms (typically 0.2 Ohms)
Resolution: 0.01 Ohms

Thermosensor Break Detection
Programmable: Up or down scale

Transmitter/Transducer Supplies
All supplies isolated: 500Vdc / peak ac

• 24V Transmitter supply – All models
  Nominally 24V @ 32mA maximum
• 10V Regulated Transducer Supply – T221, T222
  10 volts ± 0.1V @ 30mA maximum
• 0-12V Regulated Transducer Supply – T223, T224
  Resolution: 0.01V
  Accuracy: ± 0.05V (Typically 0.02V)
  Temperature Drift: <100ppm/°C
  Output Ripple: <5mV
  Output Current: 35mA maximum

analog Output – T223, T224
Isolation: 500Vdc / peak ac
Ranges: User selectable 0-10V, 0-20mA or 4-20mA
Accuracy: 0.2% of Span (typically 0.1%)
Temperature drift: <100ppm/°C
Output Ripple: <10mV
Response: 63% within 32ms, 99% within 100ms
Resolution: 0.05% of Span (5mV or 0.01mA)
Maximum Voltage Output: 11V @ 22mA
Maximum Current Output: 22mA @ 18V
Load: 0-900 Ohms (mA)
Programmable damping filter

Alarm Relay Outputs – T222, T224
Relays: 2 x Change over contacts (1 Amp @ 250VAC – 5 Amp @ 30VDC)

Serial Communications
Type: RS422/485 2 or 4 wire multidrop
Speed: 1200, 2400, 4800 or 9600 baud
Parity: Odd, even, or none
Stop Bits: 1 or 2
Protocol: MODBUS™ (RTU or ASCII), J-BUS, and DTPI
Isolation: 500 Vdc / peak ac

Physical/Mechanical
Front Panel: Protection to IP65 (NEMA4)
Dimensions: 48mm (H) x 96mm (W) x 173mm (D)
Panel Cutout: 44mm (H) x 92mm (W)
Depth Behind Panel: 166mm including terminals
Weight: 0.4kg maximum, packed weight 0.55kg

Environmental
Temperature: 10-50°C operating, -10 to 70°C storage
Humidity: 0-95% RH non-condensing

Safety and EMC Certifications
Safety: EN61010, IEC1010
Susceptibility: EN50082-2, EN50082-1
Emissions: EN50081-1
CE Certified 1995, 1999