• Full model: includes DLC sensor; reference sensor & sensor under test input
• Accurate to ±0.04°C using the external reference sensor
• 4-wire True-Ohm-Measurement technology
• Excellent stability: 0.005°C
• Wide temperature range
• RTC-156: -30 to 155°C (-22 to 311°F)
• RTC-157: -45 to 155°C (-49 to 311°F)
• Unique active dual-zone block for improved temperature homogeneity
• Dynamic Load Compensation for perfect temperature uniformity in the insert
• Display indicator for temperature uniformity
• Intelligent reference sensors hold the calibration data (coefficients) of the reference sensor
• USB communication
• High speed heating and cooling times
• Best performing dry-block with regard to the EURAMET/cg-13/v.01 guideline for testing of dry-blocks

• Temperature range:
• RTC-156
• @ ambient temp. 0°C/32°F: -46 to 155°C/-51 to 311°F
• @ ambient temp. 23°C/73°F: -30 to 155°C/-22 to 311°F
• @ ambient temp. 40°C/104°F: -15 to 155°C/ 5 to 311°F
• RTC-157
• @ ambient temp. 0°C/32°F: -57 to 155°C/-71 to 311°F
• @ ambient temp. 23°C/73°F: -45 to 155°C/-49 to 311°F
• @ ambient temp. 40°C/104°F: -31 to 155°C/-24 to 311°F
• Accuracy (model B & C) with external STS ref. sensor:
• RTC-156 B & C:  ±0.04°C/±0.07°F
• RTC-157 B & C:  ±0.04°C/±0.07°F
• 12-month period. Relative to reference standard. Specifications by use of the external JOFRA STS-200 reference sensor
• Accuracy with internal reference sensor:
• RTC-156 A, B & C:  ±0.10°C/±0.18°F
• RTC-157 A, B & C: ±0.10°C/±0.18°F
• Stability:
• RTC-156: ±0.005°C/±0.009°F1)
• RTC-157: ±0.005°C/±0.009°F1)
• Measured after the stability indicator has been on for 15 minutes. Measuring time is 30 minutes.
• Radial homogeneity (difference between holes):
• RTC-156: 0.01°C/0.02°F
• RTC-157: 0.01°C/0.02°F
• Resolution (user-selectable):
• All temperatures : 1° or 0.1° or 0.01° or 0.001˚
• Heating time:
• RTC-156 
• -30 to 23°C/-22 to 73°F: 4 minutes
• 23 to 155°C/73 to 311°F: 15 minutes
• RTC-157 
• -45 to 23°C/-49 to 73°F: 7 minutes
• 23 to 155°C/73 to 311°F: 8 minutes
• Cooling time:
• RTC-156
• 155 to 100°C/311 to 212°F:  4 minutes
• 100 to 23°C/212 to 73°F.:  8 minutes
• 23 to -24°C/73 to -11°F:  15 minutes
• -24 to -30°C/-11 to -22°F: 10 minutes
• RTC-157   155 to 100°C/311 to 212°F:  5 minutes
• 100 to 23°C/212 to 73°F:  10 minutes
•  23 to -30°C/73 to -22°F:  17 minutes
•  -30 to -45°C/-22 to -49°F: 25 minutes
• Time to stability (approx.):
• RTC-156: 10 minutes
• RTC-157:  10 minutes
• Immersion depth:
• RTC-156: 160 mm/6.3 in
• RTC-157:  160 mm/6.3 in
• Thermocouple input:
• Range : ±78 mV
• F.S. (Full Scale) : 78 mV
• Accuracy (12 months) :  ±(0.005% Rdg. + 0.005% F.S.)
• Transmitter supply:
• Output voltage:  24VDC ±10%
• Output current: Maximum 28 mA
• Transmitter input mA (B model only)
• Range : 0 to 24 mA
• Accuracy (12 months) : ±(0.005% Rdg. +0.010% F.S.)
• Voltage input VDC (B model only)
• Range: :  0 to 12 VDC
• Accuracy (12 months): ±(0.005% Rdg. +0.010% F.S.)
• Switch input (B model only):
• Switch dry contacts
• Test voltage.: Maximum 5 VDC
• Test current : Maximum 2.5 mA
• Mains specifications:
• Voltage: 115V (90-127) / 230V (180-254)
• Frequency, non US deliveries : 50 Hz ±5, 60 Hz ±5
• Frequency, US deliveries: 60 Hz ±5
• Power consumption (max.) : 400 W
• RTD reference input (B & C models only)
• Type.:  4-wire RTD with true ohm measurements1)
• F.S. (Full Scale) : 400 ohm
• Accuracy (12 months) :  ±(0.0012% rdg. + 0.0005% F.S.)
• RTD sensor under test input (B model only)
• F.S. (range) : 400 ohm
• Accuracy (12 months):  ±(0.002% Rdg.+0.002% F.S.)
• F.S. (range): 4000 ohm
• Accuracy (12 months) :  ±(0.005% Rdg. + 0.005% F.S.)
• 2-wire: add 50 mOhm
• Communication interface:
• Serial data interface : .USB 2.0 device port
• Serial data interface : USB 2.0 host double port*
• LAN: . Ethernet MAC 10/100 Base-T*
• SD:  SD slot*
• * for future expansion
• Miscellaneous:
• Operating temperature: 0 to 40°C/32 to 104°F
• Storage temperature: -20 to 50˚C/-4 to 122˚F
• Humidity :  0 to 90% RH
• Protection class : IP-10
• PHYSICAL SPECIFICATIONS
• Weight and instrument size (L x W x H):
• RTC-156/157:10.5 kg/23.2 lb
• RTC-156/157: 362 x 171 x 363 mm/14.3 x 6.7 x 14.3 in
• Shipping (without carrying case):
• RTC-156/157: 14.8 kg/32.6 lb
• Size: 570 x 235 x 440 mm/22.4 x 9.3 x 17.3 in
• Shipping (including optional carrying case):
• RTC-156/157: 20.5 kg/45.1 lb
• Size: 650 x 380 x 500 mm/25.5 x 14.9 x 19.7 in
• Shipping (carrying case only):
• Weight: 8.0 kg/13.2 lb
• Size: 650 x 380 x 500 mm/25.5 x 14.9 x 19.7 in
• INSERTS:
• Insert dimensions:
• RTC-156/157 outer diameter : 29.7 mm/1.17 in
• RTC-156/157 inner diameter (multi hole):  25.6 mm/1.01 in
• RTC-156/157 inner diameter (single hole): 22.0 mm/0.87 in
• RTC-156/157 length.: 150 mm/5.91 in
• Weight of non-drilled insert (approx.):
• RTC-156/157: 290 g/10.2 oz
• Use of other inserts may reduce performance of the calibrator. To get the best results out of the calibrator, the insert dimensions, tolerance and material is critical. We
  
• highly advise using JOFRA inserts, as they guarantee trouble free operation.

• (1) RTC-156 dry-block calibrator w/DLC sensor; reference sensor & sensor under test input
• (1) Mains power cable
• (1) Test cables (2 x red, 2 x black)
• (1) Traceable certificate - input performance for reference sensor and DLC sensor
• (1) Traceable certificate - input performance for sensorunder-test inputs
• (1) Tool for insertion tubes
• (1) JOFRACAL
• (1) USB cable
• (1) Set of rubber cones for insulation plugs
• (1) Manual

Brochure/Datassheet

Instruction Manual

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Note: Prices are not binding at any time subject to change without prior notice