4 channel type K thermocouple data logger

Digital Temperature thermometer  Model:DTM-319

   Key Features:

• -200℃ ~ 1370℃( -328 ℉ ~ 2498℉ )
• Memory Capacity： 16,000 records data logger for each channel 
•  Accuracy： -200℃ ~ 200℃ ：+/- (0.3% reading+ 1℃) 
• 200℃ ~400℃：+/- (0.5% reading + 1℃)
• 400℃ ~ 1370℃ ：+/- (0.3% reading+1℃)
• High Resolution ：0.1 ℃； 0.1 ℉ ( 0 ~ 199 ℃ )
• 4-channel thermocouples can be used simultaneously and recorded. 
•  4-digit LCD display for every tested point.
• ℃ or ℉ is user-selectable.
• HOLD function 
• Automatic Low Battery Indication ☆ Auto power off
• MAX, MIN function
• Standard Tripod mount connector
• RS-232 interface, Real time display software 

• Q & A: Temperature Datalogger specification clarification
• I like to know if the temperature data logger DTM 319 can continuously record 48 hours without connecting it on? computer

• Question:
• I am working on a development project and am considering using one of your Temperature Dataloggers which could feature as a component of a packaged product.
• I need a sampling of at least once per second, preferably faster and in the specs it seems that the DTM-318 samples 2.5 times a second (good for me but only 2 inputs) but the very similar DTM-319 samples at only 1 per 3 seconds (no good for me but has 4 inputs)? Is that just a mistake in one of the spec sheets or is there really this difference in sampling frequency?
• Answer:
• The updated ratio of DTM-319 thermo data logger is 1 per 3 seconds for the screen
• but it can record one time per second for 4 channels.
• Question 2:
• Please can you confirm that the thermo recorder DTM-318 updates 2.5 times per second? Or is it once every 2.5 seconds?
• Regarding the DTM-319, you explained that it can record each channel once per second but is the underlying data updated every second or is it recording the last 3-second update? i.e. if the temperature is increasing 1 degree per second would the record show 1,2,3,4,5,6 or 1,1,1,4,4,4 ?
• I will take the data from the RS232 port. How frequently is the data updated on that port on the DTM-319 and DTM-318?
• Response as below:
• Please can you confirm that the DTM-318 updates 2.5 times per second? Or is it once every 2.5 seconds?
• In fact, DTM-318 updates 1.25 times per second.
• Regarding the DTM-319, you explained that it can record each channel once per second but is the underlying data updated every second or is it recording the last 3-second update? i.e. if the temperature is increasing 1 degree per second would the record show 1,2,3,4,5,6 or 1,1,1,4,4,4 ?
• In principle it will be 111444 ,our engineer says he will double check with me in the afternoon.
• I will take the data from the RS232 port. How frequently is the data updated on that port on the DTM-319 and DTM-318?
• DTM-318 updates 1.25 times per second per channel.
• DTM-319 updates once every 3 seconds per channel.
• About Q2 of DTM-319 , in fact ,it should be the table as below:

Here is the DTM-319 Software Downloads  

• Another 4-Channel thermocouple temperature data logger with K J E T type leaflet downlaod..

Video Intrudcution of four channel thermocouple data logger DTM-319A