12
2.6.2 STM-1
(NOTE: Supplied with all 406 Models up to Serial #877)
The System Test Module (
STM-1
) supplied with each Model 406D Static
Decay Meter prior to Serial # 877 enables the user to check its operation
against a stable, repeatable standard. The
STM-1
uses electronic
components (resistors and capacitors) to simulate a test sample with a
known and repeatable decay time that is relatively independent of room
temperature and moisture conditions. When using the
STM-1
the
FULL
SCALE ADJUST
control must be set to the
STM-1
position to achieve a
full scale reading on the
SAMPLE CHARGE
meter and then returned to
the
NORM
setting to test samples.
3.0
OPERATION
3.1 Initial Set Up
1. Before connecting the Static Decay Meter to the AC line, the four cables from
the Faraday Cage must be connected to the Control Unit as shown in Figure
3.1-1.
Figure 3.1-1: Faraday Cage – Control Unit Interconnect
2. Recheck all cable connections to make sure that they are tight. Set the
following controls to the positions indicated:
POWER: OFF
(button up)
MAN/AUTO: MAN
(button up)
HIGH VOLTAGE:
OFF
(center button down)
HIGH VOLTAGE ADJUST:
Fully counter clockwise
3. Connect the Control Unit to the AC line by plugging its AC cord into a
properly grounded AC outlet (Mains).
4. Lift the hinged cover of the Faraday Cage and place the
STM
Module
between the electrodes of the sample holder as shown in Figure 3.1-2.
Return the cover to its operate position (cover down). [
Note:
If using an
Control
Unit
