Bio-Tek QED-III Operator's Manual page 11

2.2 QED-III description
The OED-III is housed in a heavy-duty formica case. The cover of the unit rests on a
rubberized seal when the unit is closed, forming a barrier to dust and other foreign
particles. The cover of the QED-III can be removed completely by positioning the unit
so that the meter faces the user, unlatching the locks and then pushing the cover to the
right. The QED-III is carried by a sturdy handle bolted into the front of the case. The
QED-III can be placed upright or flat when in operation; rubber feet protect both the
supporting surface and the QED-III.
The meter face of the QED-III is divided into three scales as illustrated in Figure 2.2-1.
The scales are as follows:
Scale Range Resolution
0 — 50 watt-seconds 1 watt-second
0 — 500 watt-seconds 10 watt-seconds
0 — 1000 watt-seconds 20 watt-seconds
Note that the lefthand scale reads both the 0-to-50 and the 0-to-500 ranges; when read-
ing the lower range, disregard the final zero on this dual scale.
A battery check line (red) is located at mid-scale on the meter. The adjustment screw
for the meter needle is also located at mid-scale, to the right of the meter window. The
female banana jacks are used for the isolated output when the QED-III tests the
waveform of the energy produced by a defibrillator. The black jack is for the ground
lead from the oscilloscope; the red jack is for the probe.
The activation switch for the QED-III is located underneath the lefthand contact plate.
The unit is "ON" when this plate is depressed because this switch powers the electronic
circuitry of the QED-III.
The QED-IU simulates the transthoracic resistance (TTR) of the human body and
measures the output from a defibrillator subjected to this resistance.
2-2