OPTIONS
Isolated 9-32 Vdc power
Isolated 26-56 Vdc power
NEMA-4 splash-proof lens cover

Models 2002A-J, -K and -T are low-cost 4 1/2 digit (±19,999 count) thermocouple meters with 0.1°C or 0.1°F resolution for indication-only applications. High accuracy is provided by five-segment linearization and matched, graded components for each T/C type.

STANDARD FEATURES
Mechanical features include a bright 0.56 in (14.2 mm) display, a screw-terminal barrier strip for signal and power, and a compact 1/8 DIN case that requires less than 4.1 in (104 mm) behind the panel. Electrical features include cold-junction compensation, jumper selection of °C or °F, and a linearized recorder output of 1 mV per degree.

OPTIONS
Power options include isolated 9-32 Vdc and 26-56 V dc. A splash-proof lens cover which meets NEMA-4 requirements allows the 2002A to be used in harsh industrial environments.

SPECIFICATIONS

INPUT
Thermocouple: Type J (Iron-Constantan, Fe-CuNi)
Type K (Chromel-Alumel, NiCr-NiAl)
Type T (Copper-Constantan, Cu-CuNi)
Calibration: IEC 584-1 (IPTS-68)
Configuration: Single-ended (-TC lead tied to ANA GND)
Polarity: Bipolar
Zero: Adjustable ±20°C (±36°F)
Cold-junction tempco: ±0.05 deg/deg
Sensor-wire resistance effect per conductor:
Type J: 40 µdeg/deg/ohm, up to 2500 ohm
Type K: 50 µdeg/deg/ohm, up to 2000 ohm
Type T: 50 µdeg/deg/ohm, up to 200 ohm
Sensor-break current: 300 nA
Sensor-break indication: Positive overrange (upscale)

NOISE REJECTION
NMR, SIG HI to SIG LO: 70 dB, 50/60 Hz
CMR, ANA GND to PWR GND: 120 dB, DC to 60 Hz
CMV, ANA GND to PWR GND: 1500 Vp per HV test, 354 Vp per IEC spacing

ACCURACY AT 25°C
Range for rated accuracy:
Type J: ­138.0 to +760.0°C (­216.0 to +1400.0°F)
Type K: ­105.0 to +1248.0°C (­157.0 to +1999.9°F)
Type T: ­112.0 to +400.0 °C (­170.0 to +752.0°F)
Maximum error: ±1.5°C (±2.7°F) ±5 counts
Span tempco: ±0.01% of reading/°C
Resolution: 0.1°C or 0.1°F (jumper-selectable)
Full-scale step response: 1 s
Warmup to rated accuracy: 20 min

ANALOG OUTPUT
Voltage: 1 mV/deg
Calibration error: ±1.5 mV on °C, ±2.7 mV on °F
Current: 1 mA max
Source resistance: 68 ohm

ANALOG-TO-DIGITAL CONVERSION
Technique: Dual-slope, average value
Signal-integration period: 100 ms
Read rate: 2.5/s

DISPLAY
Type: 7-segment, red LED
Height: 0.56 in (14.2 mm)
Symbols: ­1.8.8.8.8
Decimal points: Four positions programmable by jumpers behind the lens or at connector
Overrange indication: Four least-significant digits flash

DIGITAL INPUTS
Level: TTL or 5 V CMOS compatible

POWER
AC voltages: 115 or 230 Vac, ±15%
AC frequency: 49-63 Hz
DC voltages: 9-32 Vdc, isolated to 300 Vp; 26-56 Vdc, isolated to 300 Vp
Power consumption: 3.7 W
Output voltages: +4.7 Vdc and ­4.7 Vdc ±5%, 10 mA max

ENVIRONMENTAL
Operating temperature: 0 to 60°C
Storage temperature: ­40 to +85°C
Relative humidity: 95% at 40°C (non-condensing)

MECHANICAL
Dimensions: Newport DIN2A (104 mm 1/8 DIN case) (see Mechanical section for drawings)
Weight: 15 oz (425 g)
Case material: 94V-0 UL-rated polycarbonate