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The HD2178.1 and HD2178.2 are portable instruments with a large LCD display. They measure the temperature using immersion, penetration air or contact probes with RTD or thermocouple sensor. A 3 or 4 wire Pt100 sensor or a 2 wire Pt100 sensor can be connected to the input B, while a thermocouple of type K, J, T, E, N to the input A. The probes for input B, 8 poli DIN45326 connector, are equipped with automatic detection module with the factory calibration settings already being memorized inside. A miniature polarized connector for thermocouple is provided for input A. The instrument HD2178.2 is a datalogger which stores up to 80, 000 samples. These data can be transferred from the instrument connected to a PC via the multi-standard RS232C serial port and USB 2.0. The storing interval, printing, and baud rate can be configured using the menu. The models HD2178.1 and HD2178.2 are fitted with an RS232C serial port and can transfer the acquired measurements in real time to a PC or to a portable printer. The Max, Min and Avg function calculate the maximum, minimum or average values. Other functions include: the relative measurement REL, the HOLD function, and the automatic turning off that can also be disabled. The instruments have IP67 protection degree. INSTRUMENT TECHNICAL CHARACTERISTICS Instrument Dimensions ( Length x Width x Height) 185x90x40mm Weight 470g ( complete with batteries) Materials ABS, rubber Display 2x41D2 digits plus symbols Visible area: 52x42mm Operating conditions Operating temperature -5… 50° C Warehouse temperature -25… 65° C Working relative humidity 0… 90% RH without condensation Protection degree IP67 Power Batteries 4 1.5V type AA batteries Autonomy 200 hours with 1800mAh alkaline batteries Power absorbed with instrument off 20¼ A Mains Output mains adapter 9Vdc / 250mA Measuring unit ° C - ° F Security of memorized data Unlimited, independent of battery charge conditions Time Date and time Schedule in real time Accuracy 1min/ month max departure Measured values storage – model HD2178.2 Type 2000 pages containing 40 samples each Quantity Total of 80, 000 samples Storage interval 1s… 3600s ( 1hour) Serial interface RS232C Type RS232C electrically isolated Baud rate Can be set from 1200 to 38400 baud Data bit 8 Parity None Stop bit 1 Flow Control Xon/ Xoff Serial cable length Max 15m Immediate print interval 1s… 3600s ( 1hour) USB interface - model HD2178.2 Type 1.1 - 2.0 electrically isolated Connections Input for probes 8 pole male DIN45326 connector Serial interface and USB 8-pole MiniDin connector Mains adapter 2-pole connector ( positive at centre) Measurement of temperature by Instrument – RTD sensors Pt100 measurement range -200 … + 650° C Pt1000 measurement range -200 … + 650° C Resolution 0.1° C Accuracy ± 0.05° C Drift after 1 year 0.1° C/ year Measurement of temperature by Instrument - Tc TC measurement range: K -200 … + 1370° C TC measurement range: J -100 … + 750° C TC measurement range: T -200 … + 400° C TC measurement range: N -200 … + 1300° C TC measurement range: E -200 … + 750° C Resolution 0.1° C Instrument accuracy Thermocouple K ± 0.1° C up to 600° C ± 0.2° C over 600° C Thermocouple J ± 0.1° C up to 400° C ± 0.2° C over 400° C Thermocouple T ± 0.1° C Thermocouple N ± 0.1° C up to 600° C ± 0.2° C over 600° C Thermocouple E ± 0.1° C up to 300° C ± 0.2° C over 300° C The accuracy only refers to the instrument. Error due to the thermocouple or to the cold junction reference sensor is not included. Temperature drift @ 20° C 0.02% / ° C Drift after 1 year 0.1° C/ year