Omega Engineering OMB-CHARTSCAN 1400, User Manual

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6-18 Calibration ChartScan User’s Manual
CAUTION CAUTION CAUTION CAUTION
The main unit (chassis) and T/C cards must be calibrated for offset and gain prior
to calibrating the T/C cards for cold junction.
CAUTION CAUTION CAUTION CAUTION
Do not install or remove any cards from the main unit, or from its expansion
chassis unless the unit is powered “OFF” and has no power sources connected to
it.
CAUTION CAUTION CAUTION CAUTION
Do not perform calibration until after the main unit has been powered on for at
least one hour, and the Cold Cell powered on for at least 2 hours. The cards to be
calibrated, including those in an expansion chassis (if used), should be installed
prior to the 1 hour chassis warm-up, and should be in the slots in which they will
be used during data acquisition.
1. With power “OFF” to the main unit, complete the system setup as indicated by the previous figure and
table.
2. Turn power “ON” to the main unit, Cold Cell, calibrator, and digital multimeter. Allow at least one
hour warm up time before proceeding. Allow at least 2 hours warm-up for the Cold Cell.
3. If the calibration password has not been changed, enter
K12345
. If the password has been changed,
enter the K command and current password. This enables the calibration mode.