Modulex X-Ray Model G

General Information

All Procedures for this X-Ray have been taken from the original Ritter Service Manual and have been edited. For more detailed information refer to the original Ritter Service Manual



The following procedures are intended for qualified X-Ray Technicians and should not be attempted by any one else.  Failure to heed this warning could result in bodily injury.


Turn each x-ray head to be tested so that no person will be in the path of radiation and place a lead disc (O.S. 120) inside the Cone to block radiation.

Power Supply Requirements
"G" X-Ray Models are supplied for the following: 105-130 Volts, 60 Cycles AC; 105-130 Volts, 50 Cycles AC.; 210-260 Volts, 60 Cycles AC; 210-260 Volts, 50 Cycles AC. 
Make certain that the current specified on the nameplate on the underside (or right side) of the control cabinet corresponds with the power supply.

NOTE: X-Ray Units for 210-260 Volt service have a stepdown transformer with a 2:1 step-down ratio. This transformer is in the Base on G-1 floor model X-Ray Units and, in the control cabinet in wall mounted G-2 and G-3 models. 

Supply Circuit
The circuit to which 105-130 Volt X-Ray Equipment is connected must be fused for 20 amperes and must incorporate wire not lighter than No.12. 
X-Ray Equipment for 210-260 Volt service must be fused for at least 10 amps.

Line Voltage Drop
To insure optimum, trouble-free operation of the X-Ray Unit, it is important that the supply circuit has a voltage regulation of 10% or less. In other words, the voltage drop under load should not be more than 10 % of the no-load voltage.
    A simple check of the line regulation can be made by measuring the line voltage with a voltmeter before and after attachment of a 2000 Watt resistive load. Two 1000 Watt heating elements, such as used in an Electric Iron, will provide a 2000 Watt load. A 2000 Watt Space Heater can be used. The line voltage reading under this load should not show a reduction of more than 100;0 .
For example: 12 Volts drop on a 120 Volt line. The local Electrical Utility Company perhaps will perform a voltage regulation test on request of the subscriber.
NOTE: Do not use the X-Ray Unit itself as the resistive load; a false indication may be obtained.

Connection to Line -Floor Models {G-l) and Wall Models {G-2)
    The plug cap on the floor cord is of the three-wire grounding type required by Underwriters' laboratories. It must be attached to a properly grounded three-wire outlet of the Underwriters' approved type supplied with the X-Ray Unit. If building construction permits, the stationary type G-1 X-Ray Unit may be connected with concealed wiring by bringing the conduit and wires through the floor into one of the openings in the bottom of the base. In this case, a ground wire must be connected to the brass ground screw in the base.
IMPORTANT: All connections must be made in a manner approved by the National Electrical Code or the
Canadian Electrical Code. The workmanship and materials used must comply with the prevailing electrical code.