50 µV DC Differential Calibrator
The CAL-50 is a battery operated accessory providing a 50 µV (±2%) DC differential calibration signal for up to 40 AS40 AC channels (Grass Comet EEG and Comet PSG), or up to 20 AURA-PSG AC channels.

Modes
Automatic, where a repetitive signal is produced: first a 50 µV level for approximately 6 seconds, then a zero µV level for 6 seconds.
Manual, where a 50 µV level is produced for as long as a pushbutton is pressed, followed by a zero µV when the pushbutton is released.

The convention of “G1 Negative” is used in both modes.

 
SPECIFICATIONS
Physical Size   2.5" W x 3.75" H x 1" D
(6.4 cm x 9.6 cm x 2.54 cm)
Weight   0.35 lbs. (0.16 kg)
ORDERING INFORMATION
Model CAL-50   50 µV DC Differential Calibrator (direct connection to Grass Comet EEG and Comet PSG)
Model
CAB-22126
  Adaptor required for conncection to Grass AURA PSG and AURA PSG LITE

Model CAL-50