Users’ Manual
EAN-90M Tiltmeter
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6
3 MEASUREMENT OF TILT
The output of model EAN-90M tilt meter can be read by Encardio-rite model EDI-53UTM portable digital
read-out unit/datalogger. The EAN-90M can also be read or logged from a remote location by automatic
data acquisition system like Encardio-rite model EDAS-10. The tilt meter is supplied with 2 m built-in six
core cable. The cable can be terminated or extended to the nearest measurement station through a suitable
junction box.
Note:
For automatic logging by Encardio-rite model ESDL-30 datalogger, model EAN-92M Tiltmeter with
in-built SDI-12 digital interface is available.
When using with Encardio-rite model EDI-53UTM portable digital read-out unit, a break-out box (special
junction box) having suitable circular connector is available from Encardio-rite.
3.1 Wiring details
Cable colour Description
Red
+ 12V DC
Black
- 12V DC
Green
0 V (Power supply common)
Blue
Output Channel A
Brown
Output Channel B
(only for biaxial tilt sensors)
White
Output Common
3.2 Sign convention
Careful orient tilt sensor during installation. Make a note of the orientation. Uni-axial sensor measures tilt
only along axis ‘A”. Figure 4 shows a view from top and also convention used for direction/output signal
polarity.
3.3 Connecting sensor to Encardio-rite Digital readout unit
Tilt meter can be connected to Encardio-rite model EDI-53UTM
portable digital read-out unit/datalogger through a break-out
box. Break-out box provides the mating circular connector to
read-out unit. The cable can also be extended through the
break-out box. The breakout box is also equipped with lightning
arrestor.
Encardio-rite model EDI-53UTM portable digital read-out
unit/datalogger reads sine of tilt angle when parameter of typical
tilt meter is fed. To read sine of tilt angle, set-up EDI-53UTM
channel as follows:
Unit [UNITS]
No units (key 9)
Initial reading [IR]
Set to zero
Gauge factor [GF]
2/tilt meter gage factor in volts/sin 90°
Coeff of X²
Set to zero
Decimal point [DP]
As required (recommended value is 4)
Tilt angle can be calculated by sin
-1
(observed value).
For bi-axial tilt meter, set-up two channels (one for A-axis and one for B-axis) in similar manner.
Figure 4: Tiltmeter sign
B
+
-
A
+
-
Tilt
Tilt
Breakout box
