User's Manual
Precision Multifunction Calibrator
Model 422123
Introduction
Congratulations on your purchase of the Extech 422123 Precision Multifunction Calibrator.
This device can source mA, mV, V, Temperature (°C/°F) and Frequency. This device also
offers STEP and AUTO RAMP features. Careful use of this meter will provide years of
reliable service.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX 781.665.0780 - TestEquipmentDepot.com
99 Washington Street
Melrose, MA 02176
