BROMAN 861 Temperature Calibrator

The Broman 861 Temperature Calibrator is a portable apparatus designed primarily for checking the winding temperature indicators (WTIs) on large oil-cooled power transformers.   The calibrator consists of a thermal unit and a control unit connected by a 30 foot cable.  The thermal unit is a thermally insulated cylindrical block of alluminum, mounted on a steel frame, which is placed on top of the transformer under test.  The WTI probes are removed from the transformer wells and are inserted into test wells in the aluminum block.  The block is heated to the desired temperature by an internal carterage element controlled by the control unit situated at ground level where the WTI instruments are visible and where the associated control contacts are accesable.

SPECIFICATIONS

Temperature range	0 - 250 ° C
Indication accuracy:	± (0.6% of reading + 1° C)
Set point resolution:	± 1.0 ° C
RTD:	100 W , TCR = 0.00385 W /W /° C
Calibration wells:	0.500 inch diameter x 6.5 inch deep (quantity: 3)  0.625 inch diameter x 6.5 inch deep (quantity: 2) option: customer specified (quantity 5)
Input power:	120 volts @ 60 Hz  (option: customer specified)
Cable:	Interconnecting cable: 30 feet
Dimensions:	Control unit: 7 inch depth x 11 inch width x 10 inch height Temperature block: 13 inch depth x 13 inch width x 17 inch height
Weight:	Control unit: 15 lb.    Temperature block: 38 lb.