La description

Models 278610 and 278620 six-dial decade resistance boxes allow quick and easy setting of a wide range of resistance. These resistance boxes are used in combination with voltage or current standards to adjust voltage or current, as dummy load resistances or as an arm of AC bridges.
Specifications - Model 278610
Resistance Range 0.1 to 111,111&Omega, (Six decade dials)
Residual Residence Less than 23m&Omega,
Power Rating 0.3W/Step, Within 3W for overall instrument
Maximum Allowed Input 0.5W/Step, 5W for Overall Instrument
Maximum Circuit Voltage 250V
Operating Temperature Range 0 to 40°C ( 32 to 104°F)
Storage Temperature Range -10 to 50°C (14 to 122°F)
Humidity Range 25 to 85% relative humidity
Insulation Resistance More than 500M&Omega, at 500V DC between panel and circuit
Dielectric Strength 1,500 V AC for one minute
Dimensions 497(W)?116(H)?140(D)mm, excluding protrusions 19.57 x 4.57 x 5.51 in
Weight Approx. 3.5kg 7.7 lbs
Specifications - Model 278620
Resistance Range 1 to 1,111,110&Omega, (Six decade dials)
Residual Residence Less than 23m&Omega,
Power Rating 0.3W/Step, Within 3W for overall instrument
Maximum Allowed Input 0.5W/Step, 5W for Overall Instrument
Maximum Circuit Voltage 250V
Operating Temperature Range 0 to 40°C ( 32 to 104°F)
Storage Temperature Range -10 to 50°C (14 to 122°F)
Humidity Range 25 to 85% relative humidity
Insulation Resistance More than 500M&Omega, at 500V DC between panel and circuit
Dielectric Strength 1,500 V AC for one minute
Dimensions 497(W)?116(H)?140(D)mm, excluding protrusions 19.57 x 4.57 x 5.51 in
Weight Approx. 3.5kg 7.7 lbs
''