| 摘要 |
A laboratory incubator or similar electronically-controlled piece of hardware, is provided with at least one modular control unit, e.g. one for setting a desired relative humidity, and for indicating the actual relative humidity being attained within the laboratory incubator or similar device. The or each control module is provided with a normally hidden switch which may be changed by the user from its normal operating position, to each of several test positions, in which various items listed on a trouble shooting chart may be checked against the values actually indicated on the readout meter provided on that module. This leads to a determination by the user whether something is wrong with the module and it should be changed-out for salvage or repair, or if something is wrong off the module and in need of a part charge-out or a repair. Preferably the equipment is provided with a usually stowed extender board which may be taken from its stowage and temporarily plugged into the control box of the controlled device, between the control module in question and the place where that control module normally plugs into the control box, in order to make the "guts" of that module accessible and available for manipulation while it is being tested in a plugged-in condition. The extender board can be thought of as being an "extension cord" for the module that is being tested.
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