Precision Digital PD6400 - Manual (Page 76)

Model PD6400 High Voltage & Current Meter Instruction Manual
76
Internal Calibration (ICAL)
The meter is factory calibrated prior to shipment
to read in amps and volts. The calibration
equipment is certified to NIST standards.
The use of calibrated signal sources is necessary to perform the internal
calibration of the meter.
Check calibration of the meter at least every 12 months. Each input and
input type must be recalibrated separately.
The Internal calibration menu is part of the Advanced Features menu.
1. Press and hold the Menu button for three seconds to access the
advanced features of the meter.
2. Press the Up arrow button to scroll to the Internal calibration menu
(ICAL) and press Enter.
3. Select channel A (Ch-A) or channel V (Ch-v) and press enter.
4. The meter displays either current calibration (C CAL) or voltage
calibration (v CAL) depending on whether channel A (Ch-A) or
channel V (Ch-v) is selected. Press Enter to start the calibration
process.
Example of Internal Calibration for current input:
5. The meter displays low input current message (C lo). Apply the
low input signal and press Enter. The display flashes for a moment
while the meter is accepting the low input signal.
6. After the display stops flashing, a number is displayed with the
leftmost digit brighter than the rest. The bright digit is the active digit
that can be changed by pressing the Up arrow button. Press the
Right arrow button to move to the next digit.
7. Set the display value to correspond to the input signal being
calibrated (e.g. 0 VDC).
Notes:
1. If meter is in operation and it is intended to accept only one input
type (e.g. 0-5 AAC or 0-300 VDC), recalibration of other input is
not necessary.
2. Allow the meter to warm up for at least 15 minutes before
performing the internal calibration procedure.