TABLE A2. COMPARISON OF LABORATORIES' FACILITIES 



'WHOI and Kahl standards are specially made mercury-in-glass thermometers of materials and physical 

 dimensions similar to those of protected deep-sea reversing thermometers. Because of these similari- 

 ties, the time constants of the standards are the same as those of the instruments being tested. 

 ^WHOI calibration tank rack has a capacity of 18 thermometers compared with 24 for the other three 

 laboratories. The data contributed by WHOI for their Group I (-2 to 6° C) instruments were taken in 

 March 1966. 



^Q data from SIO for Group IV unprotected type were taken at sea by lowering the thermometers to the 

 required depth and reversing them with other instruments of known calibration and proven reliability. 



established for future calibration programs for scale 

 readings, V^ values, and Q factors (table A3). It was agreed 

 that the program should continue. 



Kahl Scientific Instrument Company, El Cajon, 

 California, expressed an interest in the calibration data and, 

 in February 1967, furnished scale corrections, l'^ 's and Q 

 factors of the Group IV thermometers in exchange for all 

 data from the other laboratories. 



TABLE A3. CROSS-CALIBRATION TOLERANCES TO BE USED 

 FOR FUTURE WORK 



Scale reading 



1/10 of smallest division 



V^ values 



+ 1.0°C for ranges below 

 15°C and +2.0°C for 

 ranges of 15°C and above 



Q factor 



+0.00002°C/ 

 hectogram/cm^ 

 (0.00002°C/meter 

 depth) 



30 



