• Provides 3½ Digit Display Calibrated in Temperature
• °C/°F Switch
• Linearized for All Standard Thermocouple Types
• Cold Junction Compensated
• 0.1 Degree Resolution Available (T/C Types J, K, T, E & N)
• Plug-In Card Changes T/C Type & Range
• Fits Standard 1/8 DIN Cutout
• Rated NEMA-4, Splashproof when Properly Installed

5 Year Warranty

The DIS474 displays temperature as measured by a thermocouple input. All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptibility to electrical noise and damage by lightning. The digital display utilizes an auto-zero dual-slope integrating A/D converter for accuracy and stability.

A unique analog thermocouple circuit with digital linearity compensation provides the optimum combination of resolution and thermocouple linearization. Linearization is better than ±1°C from –200°C (–328°F) to the thermocouple’s upper limit on all ranges. 0.1°C/0.1°F resolution is available for thermocouple types J, K, T, E and N (–199.9 to +199.9°C/°F). A temperature-sensing I.C. potted inside the input connector provides optimum cold-junction compensation.

All DIS instruments are gasketed and, when properly installed, are NEMA-4 splashproof. ZERO and SPAN controls are accessible by removing a gasketed front access panel.

A plug-in range card, accessible without opening the case, permits user recalibration for all thermocouple types and ranges. °C or °F is selected using switches accessible from the rear. A rear-panel jumper selects upscale or downscale burnout indication.

A complete set of engineering unit labels is sent with each DIS. Terminations are made to a screw terminal connector on the rear of the case.

TYPICAL APPLICATIONS
Temperature indication and monitoring

INPUT RANGE Wide any standard thermocouple type full temperature range above –200°C (–328°F) to +1999°C/°F Narrow -199.9 to +199.9°C/°F types J, K, T, E and N ACCURACY Wide ±(0.1% of reading plus 1°C or 2°F) (Includes T/C linearization) Narrow ±0.5°C or 0.9°F BURNOUT INDICATION jumper selectable upscale/downscale COMMON MODE REJECTION 120 dB, DC to 60 Hz

ISOLATION Input-to-Line Breakdown Voltage 1500 VAC rms DISPLAY Digit Size .56" LED, 3½ digits, ±1999°C/°F switch selectable Update Rate 3/sec OPERATING TEMPERATURE 14°F to 140°F/-10°C to 60°C TEMPERATURE STABILITY ±0.02% of span/°C MAX POWER 115 VAC ± 10%, 50 or 60 Hz (4 W max) 230 VAC ± 10%, 50 or 60 Hz (4 W max)

Terminal 1 Terminal 2 Terminal 3 Terminal 4 Terminal 5

Power AC L1 Power AC L2 Shield (Common) T/C - T/C +