E
PI
S
ENSOR
2
U
SER
M
ANUAL
D
OCUMENT
305801,
R
EVISION
A
CAL (Calibration)
The EpiSensor2 allows the injection of external calibration signals into the sensors. All three axes are
excited simultaneously. There is a green LED that is lit when CAL is ENABLED.
There are two ways to control the CAL state.
Q330 Enable Lines (Q330 used for this description)
1.
The sensor monitors Q330 CAL_ENABLE line
2.
Asserting the line enables CAL. Signals presented at the CAL+/- input pins of the connector will
be injected into the calibration circuit of the sensor
3.
De-asserting the line disables CAL
4.
The sensor operates seamlessly with the standard “Start/Stop Sensor Calibration” commands in
the Q330 control software (Willard).
RS-232 Command Line Interface
1.
At the MAIN prompt, enter “enable12345” to allow access to command menus
2.
Type “OPERATE” to select OPERATE page
3.
At the OPERATE prompt, type command to select range:
⋅
“CALON” enables CAL
⋅
“CALOFF” disables CAL
RESET
Asserting the Q330 Generic Enable 2 (“AUX 1”) line rests the sensor. It effect is equivalent to a Power-
ON-RESET (POR) event, without interrupting the power.
Setup and Initial Operation
The EpiSensor2 should be deployed on a firm, stable surface. The sensitive horizontal directions (X and
Y) are aligned with the sides of the sensor. The sensor should be leveled using the threaded adjustment
feet and the bubble level. One of these feet is shown in Figure 5. Following leveling, the feet can be
locked by tightening the lock nut up against the bottom of the sensor (finger tight only!). The central
bolt hole can be used to anchor the sensor to the mounting surface. This can use bolts and a threaded
insert in the surface, or a threaded stud that passes up from the surface to be captured with a nut at the
top of the sensor.
Connect the sensor cable to the sensor and to the digitizer (Q330-series or Rock-series). The sensor will
power-ON over the course of a few seconds. The current range setting, and current AUTOZERO status
(ON or OFF), will be signified by the LEDs.
Wait until the LED extinguishes (about 20 seconds). Pressing the LED once (for between 0.2 and 2
seconds) will re-illuminate the LED. It will also activate the button system for further control (as
discussed previously).
Upon power-ON, or a RESET event, the sensor will output an analog signal on its range indicator lines.
These will be recorded by the digitizer. The user can verify the current range setting by monitoring these
values, or by analyzing the pulse-train sequence, shown in Figure 4.
At this point, the sensor is operational.
Page 11
August 2015