Check all connections to ensure they are complete and plugs are fully seated. Replace the front panel and
attached electronics in the case. Fasten the thumb screws(9). Replace the sample cells(7) and meter
Attach external power cord and plug the Spectrophotometer into the external power source.
Electrical shock may occur if Spectrophotometer front panel is opened while connected to ac
power. Always unplug power cord from both spectrophotometer and external power source
before removing front panel.
Using the Spectrophotometer when not set up for the proper type of power may result in
electrical shock. If electrical shock occurs, see medic.
Using the Spectrophotometer when not set up for the proper type of power may result in damage
to equipment. Always check to ensure that the power connections are as specified below before
Battery Dc Power. Eight D-size dry cell batteries(17,fig. 2-5) are provided with the WQAS-PM. These are
stored in the main case under the Zinc Test Kit. Follow the steps below to set up the unit for use with batteries.
Unplug the power cord from the spectrophotometer and the external power source and open the case.
Wavelength dial should be set to 400 to avoid damage to equipment.
Remove the sample cells(7) and meter scale cards(2). Set aside. Push the wavelength dial(8) as far
forward as possible so that the indicator is below the lowest reading (400) on the wavelength scale(8).
Loosen the two captive thumb screws(9) on the front panel. Lift the front panel and attached electronics up
and out of the case. Turn the front panel upside down and gently lay it on a clean flat surface.
Examine the ac power supply board(20) attached to the back of the Spectrophotometer panel. If the unit
was previously set up for ac operation, an internal power cable(22) will connect the ac power supply
board(20) to the amplifier board(25) at BC5(24). If this is the case unplug this cable(22).
An internal ac power cable is connected to the external power cord receptacle on the back wall of
the case. It has a plastic plug marked BC1 on the opposite end. The battery power cable is
connected to the bottom of the case. It has a plastic plug marked HC5 on the opposite end.
The battery power cable(28) is connected to the bottom of the case. It has a plastic plug marked HC5(16)
on the opposite end. For dc power, connect the plug marked HC5(16) at the end of the battery power
cable(28) to the amplifier board(25) at location BC5(24).