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We understand the many challenges associated with thermocouple calibration work. That is precisely why we decided to introduce the ADT875-1210 and ADT878-1210 Thermocouple Calibration Furnaces.
With an unmatched stability, uniformity and an optional on-board process calibrator, calibrating thermocouples has never been easier. With two separate units to choose from, the ADT875-1210 and ADT878-1210 furnaces include a patented multi-zone temperature control which provides a never before seen, highly stable and uniform heat source to ensure you get the best possible results from a modest investment. With metallic interchangeable inserts, users have the flexibility needed to service a wide variety of UUT’s and the durability they have come to expect from Additel. The ADT875-1210 and ADT878-1210 can be purchased with or without our on-board process calibration electronics to provide flexibility for customers who are needing the best 1200°C heat source on the market.
If thermocouple calibration and/or verification work is part of your workload, you don’t want to miss out on this opportunity to save valuable time and money with these best in class furnaces from Additel.

Temperature Control
The Additel ADT875 and ADT878 Thermocouple Calibration Furnaces have been designed with a unique and innovative way of controlling temperature and temperature gradients. We like to call it “Advanced Adaptive Control”. This exciting new design feature incorporates our patent pending wind tunnel control technology with Additel’s impressive 3-zone temperature control to provide the very best uniformity and stability possible.
Each ADT875 and ADT878 is tested and calibrated in Additel’s accredited laboratory (Brea, CA) to ensure that each unit is ready to go when the customer opens the package. The included accredited calibration certificate provides data relating to accuracy, stability and uniformity to help provide even more confidence in the testing and calibration of each and every ADT875 and ADT878 Thermocouple Calibration Furnace.

Process Electronics
Both the ADT875 and ADT878 can be ordered with Additel's Process Calibrator(PC) option. The Process Calibrator Option combines the many features foundin a thermocouple readout device and process calibrator with the ADT875 andADT878 Calibration Furnaces.This unique option includes Additel’s patented Quick-Push connectors which accommodate virtually all TC connection types. The Process option also includes the ability to measure a reference grade thermocouple and up to (4) under test channels. Channels 1 and 2 can measure mA, voltage, perform switch testing and source 24V DC. In addition to these measurement functions, the process option provides full documenting capability of creating tasks, saving"as found" and "as left" results and HART communications for simplified transmitter work. The snapshot feature allows users to capture all information displayed on the screen with a touch of the screen. This optional add-on allows for data logging of all channels using our auto step and a ramp functions. By utilizing the external reference option users can select to control to the furnace set point using an external control probe, which helps to reduce uncertainties. The external control probe feature also facilitates the handy self-calibration feature!

• Thermocouple Calibration
• Temperature Transmitter Calibration
• Annealing / Heat Treating
• High Temperature PRT Calibration
• Industrial Temperature Sensor Verification

General Specifications
	875-1210	878-1210[1]
Temperature Range	100°C to 1210°C
Display Accuracy	±1.2°C @ 100°C	±1.0°C @ 100°C
	±1.2°C @ 300°C	±1.0°C @ 300°C
	±1.2°C @ 600°C	±1.0°C @ 600°C
	±1.6°C @ 900°C	±1.2°C @ 900°C
	±2.0°C @ 1210°C	±1.5°C @ 1210°C
Stability	±0.1°C
Axial Uniformity (20mm zone)	±0.6°C @ 100°C	±0.4°C @ 100°C
	±1.2°C @ 300°C	±0.8°C @ 300°C
	±1.5°C @ 600°C	±1°C @ 600°C
	±1.5°C @ 900°C	±1°C @ 900°C
	±1.5°C @ 1210°C	±1°C @ 1210°C
Radial Uniformity	±0.2°C @ 100°C	±0.2°C @ 100°C
	±0.3°C @ 300°C	±0.3°C @ 300°C
	±0.4°C @ 600°C	±0.4°C @ 600°C
	±0.8°C @ 900°C	±0.6C @ 900°C
	±1°C @ 1210°C	±0.8°C @ 1210°C
Loading Effect	±0.5°C
Environmental Conditions	8°C to 38°C guaranteed accuracy
	0°C to 50°C, 0% to 90% RH non-condensing,
	3000 M altitude for normal operation
Storage Conditions	-20°C to 60°C
Immersion Depth	XR style inserts = 138 mm (5.43")
	XS style inserts = 116 mm (4.57")
	(see insert ordering info for more details)
Insert Size - OD	24.8 mm (0.98 inches)
Heating Time	50 min: 23°C to 1210°C
Cooling Time	50 mins:1210°C to 300°C 50 mins: 300°C to 50°C	55 mins:1210°C to 300°C 55 mins: 300°C to 50°C
Typical Time to Stability	15 min
Resolution	0.01°C
Units	°C, °F, and K
Display	6.5 in (165 mm) color touch screen
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 lbs)
Power Requirements	115 V AC (±10%) or 230 V AC (±10%), switchable, 45-65 Hz, 580 W
Mechanical Testing	Vibrat ion: 2 g (10-500 Hz) , 30 min for 2 sides
	Impact: 4 g three times
	Drop test: 500 mm (19.6 in)
Communication	USB A, USB B, RJ45, WiFi, Bluetooth
Localization	English, Chinese, Japanese, Russian, German
Warranty	1 year
[1] 878-1210 specifications require use of an "XR" style insert. Otherwise, default to the 875-1210 specifications.

Input Specifications (Process Calibrator [PC] Option)
Specification	875-1210	878-1210
TC Measurement Channels	Patented TC terminals: Accepting S, R, K, B, N, E, J, T, L, and U
TC Measurement Accuracy Type K Ch. 1-4 (excluding sensor)	±0.182°C @ 100°C	±0.172°C @ 100°C
	±0.266°C @ 300°C	±0.236°C @ 300°C
	±0.310°C @ 600°C	±0.251°C @ 600°C
	±0.397°C @ 900°C	±0.304°C @ 900°C
	±0.517°C @1210°C	±0.382°C @ 1210°C
TC Range	–75 mV to 75 mV (UUT Channels 1-4)
	–18 mV to 18 mV (Reference Channel)
TC Resolution	0.0001 mV, Input Impedance < 10Ω
TC Voltage Accuracy	0.02% RD + 8μV (ch. 1-4)	0.01% RD + 8μV (ch. 1-4)
	0.01% RD + 2μV (ref ch.)	0.005% RD + 2μV (Ref ch.)
Internal CJC Accuracy	±0.35°C (ch. 1-4)	±0.30°C (ch. 1-4)
	±0.25°C (ref ch.)	±0.20°C (ref ch.)
Current Range	–30 mA to 30 mA
Current Accuracy	±(0.02% of rdg+ 2μA)	±(0.01% of rdg + 2μA)
Current Resolution	0.0001 mA
Voltage Ranges	–12 V to 12 V and –30 V to 30 V
Voltage Accuracy	±(0.02% of rdg+ 2mV)	±(0.01% of rdg+ 0.6mV)
Voltage Resolution	0.0001 V, Input Impedance >1MΩ
DC 24V Output	24 V ± 10%, MAX 60 mA
Hart Communication	Optional (ADT875PC and ADT878PC Models)
Temperature Coefficient 0°C to 8°C and 38°C to 50°C	TC Readouts: ±5 ppm/°C
	Current: ±5 ppm/°C
	Voltage: ±5 ppm/°C
Switch Test	Mechanical or Electrical - Channels 1 & 2 only
Documentation	Up to 1,000 tasks which store up to 10 results each containing as found and as left data. Snap shot feature allows for screen captures. Records auto step and ramp functions

TC Measurement Specifications
TC Type	TEMP (°C)	Error (°C)[1]
		875	878
K (CH1-CH4)	100	±0.182	±0.172
	300	±0.266	±0.236
	600	±0.310	±0.251
	900	±0.397	±0.304
	1210	±0.517	±0.382
N (CH1- CH4)	100	±0.273	±0.264
	300	±0.270	±0.243
	600	±0.309	±0.256
	900	±0.368	±0.285
	1210	±0.455	±0.335
E (CH1- CH4)	100	±0.136	±0.126
	300	±0.153	±0.130
	600	±0.210	±0.154
	900	±0.291	±0.202
	1000	±0.297	±0.196
L (CH1- CH4)	100	±0.223	±0.214
	300	±0.271	±0.241
	600	±0.308	±0.251
	900	±0.522	±0.448
U (CH1- CH4)	100	±0.270	±0.261
	300	±0.189	±0.164
	600	±0.227	±0.176
J (CH1- CH4)	100	±0.186	±0.177
	300	±0.197	±0.168
	600	±0.256	±0.200
	900	±0.281	±0.197
	1200	±0.414	±0.294
S (CH1-CH4)	100	±1.102	±1.094
	300	±0.924	±0.899
	600	±0.888	±0.837
	900	±0.868	±0.793
	1210	±0.865	±0.765
R (CH1- CH4)	100	±1.080	±1.072
	300	±0.869	±0.844
	600	±0.804	±0.755
	900	±0.771	±0.699
	1210	±0.766	±0.670
B (CH1- CH4)	250	±3.182	±3.170
	300	±2.645	±2.631
	600	±1.409	±1.379
	900	±1.049	±1.003
	1210	±0.905	±0.839
T (CH1- CH4)	100	±0.194	±0.185
	300	±0.191	±0.166
	400	±0.217	±0.183
S (EXT. REF)	100	±0.277	±0.273
	300	±0.242	±0.229
	600	±0.249	±0.224
	900	±0.258	±0.220
	1210	±0.266	±0.216
R (EXT. REF)	100	±0.271	±0.266
	300	±0.228	±0.216
	600	±0.227	±0.202
	900	±0.230	±0.194
	1210	±0.240	±0.192

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Documents:

File name	Upload Date	Size
Additel 875-1210 and 878-1210 Dry Well Calibrator Datasheet	2020.5.14	1 MB
Additel 875-1210 and 878-1210 Dry Well Calibrator User Manual	2020.11.17	1.4 MB

Update Packages:

File name	Upload Date	Size
Additel 875-1210 and 878-1210 Firmware Package	2021.1.13	11.6 MB
HART Temperature Library Update Package	2019.6.5	50.7 MB
HART Pressure Library Update Package	2019.6.5	138.4 MB

Videos:

File name
ADT875-1210 and 878-1210 - Introduction