HP 3852A Data scanning speed

Hi Labview users
I have 3852A DAQ, which is connected by GPIB-USB-B. It's data scanning/updating speed is lower than expected. It's reading 32 data (23 of thermocouple, and 9 of analog voltage), and the data updated every 2 seconds (While loop is set to run as fast as it can). When it reads smaller number(2 or 3) of data, it runs faster. I want to know if there is any way that I can increase the data scanning speed faster than every 2 seconds. I attached my VI for review. Thank you. 
Attachments:
Main_ver_latest.vi ‏77 KB

Your program can be simplified a lot, but probably the speed is determined solely by the measurement speed of the HP.
Not that bad for a multimeter that has to read out thermocouples at good resolution anyway.
So first check the measurement speed, and than try to add more multimeters to speed things up.
greetings from the Netherlands

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