Control Unit; Controlunit Fuses - Teledyne 1220 Instruction Manual

Multi-Channel Combustible Monitor

3.3 Control Unit

In the event that it becomes necessary to remove the Control Unit,
primary power to the System Chassis must first be disconnected, and the
six small screws around the periphery of the Control Unit front panel
removed. The two knurled, slotted jack screws may then be backed out to
pull the Control Unit out until it is disengaged from its socket. It may then
be slid out of the chassis.
Reinstallation of the Control Unit simply requires that it be slid into
the system chassis, making certain that the circuit board lines up with the
connector. The circuit may be seated in the connector by tightening the
jack screws. The six retaining screws may then be reinstalled and the
primary power reconnected to the System Chassis.
3.3.1 Control Unit Fuses
The Control Unit contains three fuses. Two 3 Amp fuses protect the
entire system (one fuse for Hot, one for Neutral). An independent 1/8
Amp fuse protects the Control Unit circuitry. To change any of the fuses,
twist the fuse holder knob counterclockwise and slide the holder out until
the fuse is visible, install the new fuse, slide the holder back in, and turn
the knob clockwise.
Figure 3-3 Analog Output Connection
Teledyne Analytical Instruments
Installation 3
3-5