Product Overview - Hach Sigma 950 Manuel D'utilisation De Base

If this device is not operating correctly, it can cause damage to the telephone network. Disconnect
this device until the source of the problem is identified and the repair is completed. If this is not done,
the telephone company may temporarily disconnect service.
The telephone company can make changes in its technical operations and procedure. If such
changes affect the compatibility or use of this device, the telephone company must give sufficient
notice of the changes.
If the telephone company asks for information on the equipment that is connected to their telephone
lines, supply them with:
• Telephone number to which the unit is connected
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• Ringer equivalence number (1.4B)
• USOC jack required (RJ11C)
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• FCC registration number
The ringer equivalence number (REN) is used to identify how many devices can be connected to the
telephone line to which the unit is connected. In most areas, the sum of the RENs of all devices on
any one line should not be more than five. If too many devices are attached, the devices may not
receive calls correctly.
Equipment attachment limitations notice:
The Canadian Industry Canada label identifies certified equipment. This certification identifies that
the equipment is in conformance with specific telecommunications network protective, operational
and safety requirements. The Canadian Industry Canada label does not identify that the equipment
will operate to the satisfaction of the user.
Before this equipment is installed, get the permission of the local telecommunications company to
connect it to the facilities. Use an allowed method of connection. If allowed, increase the length of the
inside wiring associated with a single-line individual service as necessary with a certified connector
assembly (telephone extension cord). Be aware that compliance with these conditions may not
prevent service degradation in some situations.
Repairs to certified equipment should be done by an authorized Canadian maintenance facility
identified by the supplier. Repairs or equipment changes made by the user or equipment
malfunctions can give the telecommunications company cause to ask the user to disconnect the
equipment. For the protection of the user, make sure that the electrical ground connections of the
power utility, telephone lines and internal metallic water pipe system, if present, are connected
together. This precaution can be particularly important in rural areas.
The load number (LN) given to each terminal device identifies the percentage of the total load that
can be connected to a telephone loop that is used by the device. If a higher percentage of the total
load is applied, damage to the telephone loop can occur. The termination on a loop can be any
combination of devices whose total load numbers are not more than 100.

Product overview

This instrument is a portable, waterproof flow meter that is used with an attached sensor to measure
and record flow in open channels, full pipes and surcharged lines. This instrument can be used to
control a wastewater sampler.
The instrument enclosure is waterproof and corrosive gas resistant even with the front cover open.
The front cover has two lockable latches to prevent vandalism and unauthorized use of the keypad. A
software lock can also be enabled, which locks the keypad.
Typically, this instrument is used with a level sensor to measure flow when there is a primary
measuring device (e.g., flume, weir or pipe) that has a known level-to-flow relationship. The level
sensor measures the level of liquid in a channel that adds to the flow (referred to as the "head").
Then, the instrument calculates the flow rate based on the head-to-flow relationship of the primary
device. In addition, this instrument can be used with a velocity sensor. The velocity sensor measures
the average velocity of the flow stream with a Doppler sensor that is under water. Then, the
instrument calculates the flow based on the current depth and the Continuity Equation: Wetted Area
× Velocity = Flow.
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Recorded on the device label
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