First encounters
•
To monitor the mass position outputs, switch the dial to
V, N/S
or
E/W MASS
POS
. Whilst you are adjusting mass position offsets, you should also switch
the instrument out of broadband mode by switching the rightmost
CENTRING
SELECT
switch to
1 SEC VEL
, or by holding down the
CENTRE
button on a
breakout box.
•
You can set the range of the meter with the
RANGE
switch. When switched to
10 V, the meter ranges from –10 to + 10 V (as marked.) When switched to 1 V,
the range is –1 to +1 V.
3.2.2.2
Calibration
You can calibrate a 40T sensor through the HCU by connecting a signal generator
across the yellow and green
CALIBRATION SIGNAL
inputs and setting the adjacent
switch to
ON
. The sensor's response can now be monitored or recorded, and
calibration calculations carried out. See Chapter 5 on page 25 for full details.
3.2.2.3
Control commands
If you have ordered a 40T with the remote null facility, you can zero its mass position
offsets from the HCU.
1. Select the component you want to centre from the
CENTRING SELECT
dial.
2. Switch the signal meter dial to one of the
MASS POS
settings.
3. Switch the rightmost switch to
1 SEC VEL
to enable the centring lines.
4. Press the
+/–
switch towards – to centre a mass from a positive value, or
t to centre it from a negative value.
3.2.2.4
Banana plugs
The remainder of the HCU provides useful connections for each of the signal lines
from the instrument, for attaching to your own equipment as necessary.
9
Issue F - June 2019
