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DH1 BASE UNIT / DH2 WIRELESS GATEWAY
USER GUIDE
36.
GENERAL MAINTENANCE
The Wireless Gateway is easy to maintain and does not require periodic
system checks. Transmitter generally only needs a yearly visual inspection
for the following:
Is the Gateway still securely fastened to the mounting location?
Are there any visible signs of corrosion, cracks or residue build-up on the
device?
Has anything about the intended use of the original application
changed?
If the Wireless Gateway is securely fastened, with no signs of corrosion,
cracks, residue build-up, or if nothing has changed about the location of its
intended use, it should continue to operate within designed specification.
If the Wireless Gateway is not securely fastened; if there are signs of
corrosion, cracks, residue build-up; or if there has been a change to the
location of its intended use resulting in undesirable performance, contact
the manufacturer for service instructions.
Cleaning: To prevent static discharge, wipe the outer casing with a damp
cloth only.
37.
GLOSSARY
16-Bit Integer
- a unit of digital information comprised of 16 bits which may be interpreted as:
Unsigned:
0
to
65,535
(
2
16
–1) or
Signed:
−32,768
(
−(2
15
)) to
32,767
(
2
15
–1) value.
32-Bit Float
- a method of representing
real numbers
in a way that can support a wide range of values..
Analog Signal
- any
continuous
signal
for which the time varying feature (variable) of the signal is a
representation of some other time varying quantity, i.e., analogous to another time varying signal. For
example, in sound recording, fluctuations in air pressure strike the diaphragm of a
microphone
inducing
fluctuations in current produced by its coil. This current is said to be an "analog" of the sound.
Analog Input
- a method for measuring an analog signal.
Analog Output
- a method for producing an analog signal.
ASCII
- The American Standard Code for Information Interchange, is a character-encoding scheme based
on the ordering of the English alphabet. ASCII codes represent text in computers, communications
equipment, and other devices that use text.
Baud Rate
- A
number
related to the speed of data transmission in a system.
The
rate
indicates
the
number of
electrical
oscillations
per second that
occurs
within
a
data
transmission.
The
higher
the baud
rate,
the
more bits per
second
are
transferred.
Bias
- while scaling an analog input, the value added to offset the range. Example: range = 500, bias =
100, analog input values scale from 100 (min) to 600 (max).
Bit
- a contraction of binary digit, is the basic unit of
information
in
computing
and
telecommunications
; it is the
amount of information stored by a digital device that exists in one of two possible distinct
states
1 or 0, On or Off,
etc...
Bit Rate
- RF data rate or rate that RF data is transmitted over-the-air (9.6k, 115.2k-900MHz or 250k-
2.4MHz).
Byte
- unit of digital information in computing and telecommunications that most commonly consists of
eight bits.
Channel
- one of either 10 hopping sequences (900MHz) or 12 direct sequence channels (2.4GHz) used
to isolate radio communications.
COM Port
- a serial communication physical interface through which information transfers in or out one bit at
a time.
Configuration Port
- the COM Port used to configure an OleumTech device.
Controlled Copy
