In-Transit Temperature Chart Recorders FAQs
How do I start the chart recorder and know it is working.
- Fill out the Docking Ticket information.
- Open the sleeve and pull the Start Tab.
- Check clear window to see clock movement and listen for ticking.
- If moving and ticking OK to use. If there is no movement do not use.
What is the accuracy specification for my In-Transit Chart recorder?
The accuracy specification is ±1°C (1.8°F).
What time range of chart recorder should I use for my trip?
You should use a recorder that will record a long enough time for your longest trips so you do not run out of chart and have missing data. Also you should use a recorder that does not record too much longer than the trip or the resolution will not be good. For example, if you use a 90 Day recorder for a 1 day trip you will only have less than ½ inch of written data which is not good enough resolution to see temperature swings or time accuracy.
What temperature range of chart recorder should I use?
There are 3 ranges to choose from. Be sure the trip temperatures will be within the recorder range or the stylus will move to the top or bottom of the chart and stop – no longer showing the actual temperature.
What happens if the temperature goes outside the range of the chart recorder?
The stylus will stop at the edge of the range and write at the very top or bottom of the chart until the temperature is within the range then it will continue recording correctly. If the temperature goes below -40°C the chart recorder may stop moving the chart due to low battery voltage then restart when the temperature rises.
What batteries are in the chart recorders?
Standard and High Range: AA Zinc Chloride. Low Range: AA Lithium
How can I dispose of my chart recorders?
The chart recorders have the batteries listed above and electronics in the clock motor. They are not recycled and should be disposed according to the regulation in your particular area.
Does the product download data electronically to a computer?
No. The temperature information is stored on a 36’ long pressure sensitive chart that is written to by a stylus attached to a bi-metal coil. The receiver can view the data without use of any other equipment.
How do I remove the chart to see the temperature data?
This can be done with or without removing the cardboard sleeve. Pry the two pieces of plastic apart where you cut the silver tape and the door assembly will separate with the chart and spool attached. Remove the chart from the spool very carefully as it can create marks on it from scratches like carbon paper. The instructions are also printed on the sleeve of the recorder.
Does my chart recorder show the actual trip dates and times?
No. The recorder shows “Elapsed Time” after the Start Time when the tab was pulled and the time is hand written on the white paper Docking Ticket attached to the chart.
What are the “scribbled” marks around Elapsed Time 0 hrs?
These marks are created by stylus movement from impacts and vibrations to the recorder before it was started.
What is the horizontal line on the chart before Elapsed Time 0 hrs on the chart?
This is the Factory Test Area where the operation of the recorder is tested at the factory. It is not related to the trip data.
How do I read the chart?
The chart shows temperature on the vertical scale and elapsed time on the horizontal scale. Either use the scale at the top or bottom according to the model of the recorder. This is very important in getting the correct times in the data. To calculate time use the Start Time on the hand written Docking Ticket as the starting point at Elapsed Time 0 hrs and calculate all other time forward from that time.
Why is there not enough time on the chart for the length of the trip?
- You are reading the top time scale on the chart but the recorder model uses the bottom time scale.
- The pull tab is still in the recorder and it was not started.
- The clock motor is not moving or ticking so the unit stopped recording data.
- Contact DeltaTrak Technical Support for assistance.
Why are the temperature readings so far off from the expected trip temperatures?
You are reading the incorrect temperature scale on the chart – both °C and °F are shown. If this is not correct contact DeltaTrak Technical Support.
Should the chart recorder be returned to DeltaTrak after being used on a trip?
No. They are not recycled although they may be returned for a Post Trip Calibration Service, after contacting Technical Services for an RGA, if there was a temperature problem or claim on the load.
My chart recorder stopped working do I need a Post Trip Calibration?
DeltaTrak’s free Post Trip Calibration Service is for situations where the temperature of the load is in question, there is a claim on the load or the validity of the recorder’s calibration is in question. If the recorder did not start, stopped during the trip or had a malfunction not related to calibration the Post Trip is expensive and may be unnecessary. If a Post trip analysis is needed, contact DeltaTrak Technical Support.
Where are the standard temperature points a chart recorder Post Trip is performed at?
The 3 standard points are 25°C(77°F), 0.0°C(32°F) and -17.8°C(0°F). However other temperatures may be tested when necessary.