Additel 878 - Reference Dry Well Calibrator

• Three models: 878-160 (-40°C to 160°C), 878-425 (33°C to 425°C), 878-700 (33°C to 700°C)
• Stability (30 min) of ±0.005°C at full range and radial uniformity of ±0.01°C at full range (878-160)
• Dual-zone control, set point control by reference, and self-calibration of the internal control sensor
• 6.5 in (165 mm) color touch screen, 0.001°C resolution
• Process Calibrator (PC) option: reference PRT input, two channels measuring RTD, thermocouple, mA, voltage, and switch, full HART communicator, Quick-Push connectors
• Optional TPW kit for automatic triple point of water realization (ADT878-160 only)
• Built-in automatic PRT annealing feature (ADT878-700 only)
• USB A, USB B, RJ45, WiFi, and Bluetooth communication

• Calibration of RTDs, PRTs, thermocouples, and temperature transmitters against an external reference PRT
• Temperature loop checks with HART transmitter configuration (PC version)
• Documented calibrations with as found and as left results (PC version)
• Reference PRT maintenance: triple point of water checks (878-160) and PRT annealing (878-700)
• Laboratory and on-site calibration of process temperature sensors from -40°C to 700°C

• Temperature range at 23°C: -40°C to 160°C (878-160); 33°C to 425°C (878-425); 33°C to 700°C (878-700)
• Typical time to stability: 10 min
• Resolution: 0.001°C
• Units: °C, °F, and K
• Environmental conditions: 8°C to 38°C guaranteed accuracy; 0°C to 50°C, 0% to 90% RH non-condensing
• Storage conditions: -20°C to 60°C
• Display: 6.5 in (165 mm) color touch screen
• Size (H x W x D): 170 x 345 x 330 mm (6.69 x 13.58 x 13.0 in)
• Communication: USB A, USB B, RJ45, WiFi, Bluetooth
• Localization: English, Chinese, Japanese, Russian, German, French, Italian, and Spanish
• Insert models: A, B, C, D, E, F
• Power option: 110 V or 220 V
• Readout accuracy for 100 ohm PRT, PC option (probe accuracy not included): ±0.005°C at -40°C; ±0.006°C at 0°C; ±0.008°C at 50°C; ±0.009°C at 100°C; ±0.011°C at 160°C; ±0.015°C at 300°C; ±0.019°C at 425°C; ±0.026°C at 660°C; ±0.028°C at 700°C
• PC option inputs: RTD channels 2 (2, 3, or 4-wire RTDs); TC channels 2 (S, R, K, B, N, E, J, T, C, D, G, L, and U); current range -30 mA to 30 mA, accuracy 0.01% RD + 2 µA; voltage ranges -12 V to 12 V and -30 V to 30 V, accuracy ±0.01% RD + 0.6 mV; DC 24 V output 24 V ±10%, MAX 60 mA
• Standard accessories: reference dry well and selected insert; power cable; USB cable; insert removal tool; thermal shield (ADT878/PC-425/700 only); silica gel plugs, 1 set (3 pcs.) and insulation plug (ADT878/PC-160 only); test leads, 2 sets (4 pcs.) (ADT878PC only); ISO 17025 accredited calibration
• Warranty: 1 year

The ADT878-1210 extends the 878 family to thermocouple work, with temperature control from 100°C to 1210°C. It uses multi-zone temperature control and metallic interchangeable inserts, and can be ordered with the Process Calibrator (PC) option for on-board TC measurement and documentation.

• Temperature range: 100°C to 1210°C
• Display accuracy: ±1.0°C at 100, 300 and 600°C; ±1.2°C at 900°C; ±1.5°C at 1210°C
• Stability: ±0.1°C
• Axial uniformity (20 mm zone): ±0.4°C at 100°C; ±0.8°C at 300°C; ±1°C at 600, 900 and 1210°C
• Radial uniformity: ±0.2°C at 100°C; ±0.3°C at 300°C; ±0.4°C at 600°C; ±0.6°C at 900°C; ±0.8°C at 1210°C
• Loading effect: ±0.5°C
• Inserts: AR, DR, HR (reference style, 138 mm / 5.43 in hole depth, 24.8 mm OD) or no insert. The 878-1210 specifications apply with reference style inserts.
• Heating time: 50 min, 23°C to 1210°C
• Cooling time: 50 to 55 min from 1210°C to 300°C, and 50 to 55 min from 300°C to 50°C
• Typical time to stability: 15 min
• Resolution: 0.01°C; units: °C, °F, K
• Display: 6.5 in (165 mm) color touch screen
• Power: 90 to 254 VAC, 45 to 65 Hz, 580 W; available in 110 V and 220 V configurations
• Communication: USB A, USB B, RJ45, Wi-Fi, Bluetooth
• Size (H x W x D): 345 x 170 x 330 mm (13.6 x 6.7 x 13.0 in); weight: 10.6 kg (23.4 lb)
• PC option: four TC measurement channels accepting S, R, K, B, N, E, J, T, L and U; channels 1 and 2 also measure mA and voltage, perform switch tests and source 24 V DC; HART communication; up to 1,000 tasks with as found and as left results
• Warranty: 1 year

A dry well is only as good as the temperature it delivers to the sensor under test. Stability, axial and radial uniformity, and loading effect decide how much of the uncertainty budget the heat source consumes before the reference probe is even read. The Additel 878 is built to keep that share small, with dual-zone control and specifications that reach ±0.005°C stability and ±0.01°C radial uniformity on the 878-160.

Three models cover the range from -40°C to 700°C. The 878-160 works from -40°C to 160°C and, with the optional ADT878-TPW-KIT, realizes and maintains a triple point of water cell automatically. The 878-425 reaches 425°C, and the 878-700 adds a built-in PRT annealing feature. Set point control can follow the external reference PRT, and a self-calibration routine recalibrates the internal control sensor against that reference.

The Process Calibrator (PC) option turns the dry well into a documenting calibrator: a reference PRT input, two channels for RTDs, thermocouples, mA, voltage, and switches, and a full HART communicator to read, configure, and calibrate transmitters. For liquid immersion work, see the Additel 835 calibration bath; for field dry block work, the Additel 875; for laboratory thermocouple calibration up to 1200°C, the Additel 850.

AV-TEK Consulting supplies Additel temperature calibration equipment across North America and helps you select range, insert, and reference probe for your sensors. Browse all temperature calibrators and furnaces or the full Additel range.

• 878-160: display accuracy ±0.1°C at full range; stability (30 min) ±0.005°C at full range; axial uniformity at 60 mm (2.4 in) ±0.035°C at -40°C, ±0.020°C at 0°C, ±0.050°C at 160°C; axial uniformity at 80 mm (3.15 in) ±0.050°C at -40°C, ±0.040°C at 0°C, ±0.050°C at 160°C; radial uniformity ±0.01°C at full range; loading effect ±0.08°C (display sensor), ±0.010°C (external sensor); hysteresis (display sensor) 0.025°C; immersion depth 160 mm (6.30 in); insert OD 31.9 mm (1.26 in); heating time 4 min -40°C to 23°C, 10 min 23°C to 160°C; cooling time 8 min 160°C to 23°C, 15 min 23°C to -40°C; weight 11.2 kg (24.7 lbs); power 90-254 VAC, 45-65 Hz, 580 W
• 878-425: display accuracy ±0.2°C at full range; stability (30 min) ±0.010°C at 100°C, ±0.015°C at 225°C, ±0.020°C at 425°C; axial uniformity at 60 mm (2.4 in) ±0.10°C at 100°C, ±0.15°C at 225°C, ±0.25°C at 425°C; axial uniformity at 80 mm (3.15 in) ±0.15°C at 100°C, ±0.20°C at 225°C, ±0.30°C at 425°C; radial uniformity ±0.025°C at 100°C, ±0.030°C at 225°C, ±0.040°C at 425°C; loading effect ±0.05°C (display sensor), ±0.01°C (external sensor); hysteresis (display sensor) 0.04°C; immersion depth 193 mm (7.60 in); insert OD 30.8 mm (1.21 in); heating time 15 min 23°C to 425°C; cooling time 24 min 425°C to 100°C, 15 min 100°C to 50°C; weight 9.7 kg (21.4 lbs); power 90-254 VAC, 45-65 Hz, 1400 W
• 878-700: display accuracy ±0.20°C at 33°C, ±0.20°C at 425°C, ±0.25°C at 660°C; stability (30 min) ±0.010°C at 100°C, ±0.020°C at 425°C, ±0.030°C at 700°C; axial uniformity at 60 mm (2.4 in) ±0.10°C at 100°C, ±0.25°C at 425°C, ±0.40°C at 700°C; axial uniformity at 80 mm (3.15 in) ±0.15°C at 100°C, ±0.30°C at 425°C, ±0.60°C at 700°C; radial uniformity ±0.025°C at 100°C, ±0.040°C at 425°C, ±0.060°C at 700°C; loading effect (display sensor) ±0.02°C at 100°C, ±0.05°C at 425°C, ±0.15°C at 700°C; loading effect (external sensor) ±0.01°C at 100°C, ±0.02°C at 425°C, ±0.03°C at 700°C; hysteresis (display sensor) 0.07°C; immersion depth 193 mm (7.60 in); insert OD 30.8 mm (1.21 in); heating time 25 min 23°C to 700°C; cooling time 30 min 700°C to 100°C, 15 min 100°C to 50°C; weight 9.7 kg (21.4 lbs); power 90-254 VAC, 45-65 Hz, 1400 W