That is interesting "calibration report". It's more like a lab note of quick check, than by any means calibration report.
No zero check, meter tested only at 1/2 of the scale, messed up resistance check (100 ohm at 20 ohm range?
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/facepalm.gif)
) without again any zero data.
No standards value for resistance? As you already saw, only single 1kHz frequency test for ACV. You can check
calibration manual for 2002, which does list very well defined performance test procedure.
Minimum required 2002 equipment list for performance test is 4W banana short, F57x0 + booster F5725 + 1Gohm resistance standard + AFG to test frequency.
Minimum required 2002 user calibration list: F57x0 (booster is not required)
Minimum required 2002 manufacturing calibration list: F57x0 (booster is not required) + stable AC source to supply 1Hz 2V signal + GPIB software.
Also you may want to have ambient temperature at +24 C, instead of +20 C for a meter like 2002, guessing that you might likely to have 24-25C ambient, than keeping it that chilly for days.
But all these are not the first question you should ask. Correct question is - what level of accuracy do you need/want/can afford. Based on response, you have various option then, from cheap 3rd tier lab calibration (which is not including adjustment, that's what you got now) to Keithley/Tektonix calibration(+adjustment if desired) for which you likely be required to send unit to Keithley USA, or to 1st tier calibration from top dogs for lot of $$$$.
After full service cal + adjustment it's reasonable to expect meter to meet it's 24 hour specification, not 1 year!
I've attached calibration report from one of K2001 I've adjusted and tested for your reference.