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1.
Introduction and Specifications
Model MD900-T “Iris” is a low-cost
biaxial clinometer with both digital and analog
outputs, designed for a variety of industrial and
scientific applications (Figure 1). A liquid-filled
electrolytic transducer comprises the sensing
element and is excited and read by stable, low-noise
electronics. The clinometer is housed in an easily
mountable box and provides an RS232 serial
interface via a 6-pin NEMA 4X connector (Figure
2). Model MD900-T has factory calibration values
stored in non-volatile memory. Output data (x, y,
temperature and serial no.) are provided in several
digital formats. Each unit is shipped with our
powerful ZAGI graphing and logging software.
Figure 1. Model MD900-T
High-Gain Version
ANGULAR RANGE
RESOLUTION
REPEATABILITY
HYSTERESIS
LINEARITY
ANALOG SCALE FACTOR
ANALOG OUTPUT
DIGITAL OUTPUT
TIME CONSTANT, T
NATURAL FREQUENCY
TEMPERATURE COEF.
POWER REQUIREMENTS
ENVIRONMENTAL
ENCLOSURE
WEIGHT
Standard Version
±10 degrees
0.002 degree
0.01 degree (static)
0.02 degree
1% of full span typical
4°/ volt typical
±25 degrees
±50 degrees
0.004 degree
0.01 degree
0.01 degree (static)
0.02 degree (static)
0.02 degree
0.04 degree
1% of full span typical
1% of full span typical
10°/volt typical
20°/volt typical
0-4.75 Volts DC, single-ended
RS232 - Two orthogonal tilt angles plus one temperature. Transmit and receive.
Baud rate: 9600 (default), 19200, 28800, 57600, 115200, 230400
Formats: NMEA XDR, Trimble proprietary, Ashtech compatible, simple
0.15 second; output is proportional to 1-e-t/T-0.01e-t/5000T where t is time in seconds
7 Hz
Span: <0.02%/ºC typical. Zero (bias): 10 arc seconds/ºC typical. Lower values available.
7-28 VDC @ 30 mA, 250 mV peak-to-peak ripple max., reverse polarity and surge protected.
12V wall transformer included
-40º to +85º C operating and storage; 100% humidity, not submersible; IP65 (NEMA 4X) rating
Painted, cast aluminum box, 120 x 80 x 60 mm. Four 4.4 mm dia. mounting holes at corners of
107 x 67 mm rectangle. 1.8m (6 ft) cable included.
550g (1.2 lb)
Ordering Information
High-gain version, Model MD900-TH
Standard version, Model MD900-TS
Wide-angle version, Model MD900-TW
Additional 1.8m (6 ft) cable whip
Additional 12V wall transformer
Horizontal mounting plate
Vertical mounting bracket
B-03-1001, Rev. H
Wide-Angle Version
1
Part No.
98009-03
98009-01
98009-02
84033
00254-02
84051
81439