Attention: TDR Forum Junkies 
Timd32
TDR MEMBER
I was paying a 3rd party to come to my shop and was $40 per torque wrench (now $52), pretty much watched their procedure to put a sticker on it and said I can do better then that with more frequent checks and better documentation control, also can make repairs more efficiently.
I really need an accurate tool more then I need a calibration sticker, where as my Auditors and UL or Intertek inspections focus on the paper trail and sticker, so you need a procedure that follows a written standard, or copy the info from the mfg so if they cross check it matches the mfg data and procedures.
Depending on your industry most customers have specs or list a general duration between checks and must be NIST traceable for how you need to "calibrate" your test equipment. In my case I need to follow a mix of UL and ANSI standards.
I use a CDI Torque Tester that is compliant with ISO-6789-2003 and ASME B107-28-2005 standards. This is cross referenced in some of the UL and ANSI standards for my industry.
Pretty much follow the standard tests and record your results. Track the tool file away the paper work, new sticker, back to work.
Our tester is .5% accurate, most of my wrenches are 3% to 4% tools, so my tester is = or better accuracy. That's an important step.
We do 3 checks on 3 ranges of the tool and record the level of accuracy.
If out of spec there are a few tricks to get then within, 95% of my 50 or so torque wrenches are CDI so you get used to the adjustment procedure, as long as the spring is not wiped out it's a pretty fast adjustment process.
Then our tester gets 3rd party "calibrated" annually, which is checked to something else, that was "calibrated"........and so on....
The short story have a process that follows a industry standard, test to that standard, record you test results, save for the auditor folks.
Other industries require more stringent testing and higher accuracy, so you will see Torque testers in the $80k-90k for the machine. Luckily I'm not in that industry. Also those automate the tests and the sort super fancy stuff.
I really need an accurate tool more then I need a calibration sticker, where as my Auditors and UL or Intertek inspections focus on the paper trail and sticker, so you need a procedure that follows a written standard, or copy the info from the mfg so if they cross check it matches the mfg data and procedures.
Depending on your industry most customers have specs or list a general duration between checks and must be NIST traceable for how you need to "calibrate" your test equipment. In my case I need to follow a mix of UL and ANSI standards.
I use a CDI Torque Tester that is compliant with ISO-6789-2003 and ASME B107-28-2005 standards. This is cross referenced in some of the UL and ANSI standards for my industry.
Pretty much follow the standard tests and record your results. Track the tool file away the paper work, new sticker, back to work.
Our tester is .5% accurate, most of my wrenches are 3% to 4% tools, so my tester is = or better accuracy. That's an important step.
We do 3 checks on 3 ranges of the tool and record the level of accuracy.
If out of spec there are a few tricks to get then within, 95% of my 50 or so torque wrenches are CDI so you get used to the adjustment procedure, as long as the spring is not wiped out it's a pretty fast adjustment process.
Then our tester gets 3rd party "calibrated" annually, which is checked to something else, that was "calibrated"........and so on....
The short story have a process that follows a industry standard, test to that standard, record you test results, save for the auditor folks.
Other industries require more stringent testing and higher accuracy, so you will see Torque testers in the $80k-90k for the machine. Luckily I'm not in that industry. Also those automate the tests and the sort super fancy stuff.
