b. Applications include self-contained power measurement, precision power
secondary reference level.
(1) Equipment connections.
(c) Energize signal source
(d) Null both NBS II Power Bridges using following procedure:
a. With instrument turned off, set BARR-THER switch
according to type of bolometer mount being used.
If this switch is not set
properly it is possible to destroy a bolometer element, particularly a
barretter. Turn instrument off before changing the switch setting.
Attach lower links as appropriate for mount operating
c. Rear grounding link should be in place unless it is
necessary to float instrument above ground.
instrument turned on.
This measurement requires the use of an external voltmeter.
accuracy of this voltmeter should be the best possible, since its error
contributes directly to the overall measurement error. The voltmeter
should be connected to binding posts 21 and 22 located on the lower