Inquiry (采购产品): Hypot calibration services We have and use 2 older (i.e. "senior" Hypot)testers here. One is a Hypot Model 8540, Serial #9 ARC Resistance Tester. The other is a Hypot Model 4309 M2 Serial # 4. Both work - but - we need to calibrate them and if possible get operators manuals. Can you let us know if there is a local calibration company?. Also, please send email to following listed, not this computer, thanks, John Eagan. Co. address is 353 Circuit St. Hanover, MA 02339. **** Hidden Message ***** David Greenwood 353 Circuit St. Hanover, MA 02339 USA Company: Hapco, Inc. Title: Lab Manager Phone: 781-826-8801 E-mail: david_greenwood@hapcoweb.com **** Hidden Message ***** david_greenwood@hapcoweb.com