User manual

1 Calibration Procedures
Using the Front Panel for Adjustments
24 U1271A/U1272A Service Guide
recommended to wait for 1 minute before you begin the
calibration after connecting the test leads.
4 Before proceeding with the ambient temperature
adjustment, be sure to turn on the multimeter for at least
1 hour with the K- type thermocouple connected.
Valid adjustment input values
Adjustment can be accomplished using the following input
values below.
CAUTION
Never turn off the multimeter during an adjustment. This may delete
the calibration memory for the present function.
Table 1 - 3 Adjustment input values
Test function Step Reference value Valid reference input
DCmV
SHORT SHORT SHORT V/COM terminals
30 mV 30.000 mV 0.9 to 1.1 × Reference value
300 mV 300.00 mV 0.9 to 1.1 × Reference value
AcmV
30 mV 3.000 mV (70 Hz) 0.9 to 1.1 × Reference value
30.000 mV (70 Hz) 0.9 to 1.1 × Reference value
30.000 mV (30 kHz) 0.9 to 1.1 × Reference value
300 mV 30.00 mV (70 Hz) 0.9 to 1.1 × Reference value
300.00 mV (70 Hz) 0.9 to 1.1 × Reference value
300.00 mV (30 kHz) 0.9 to 1.1 × Reference value
DCV
SHORT SHORT SHORT V/COM terminals
3 V 3.0000 V 0.9 to 1.1 × Reference value
30 V 30.000 V 0.9 to 1.1 × Reference value
300 V 300.00 V 0.9 to 1.1 × Reference value
1000 V 1000.0 V 0.9 to 1.1 × Reference value