Description; Compatible Equipment - Teledyne 4250 Installation And Operation Manual

4250 Flow Meter
Section 1 Introduction

1.1 Description

1.2 Compatible
Equipment
1-2
The 4250 Area Velocity Flow Meter uses a sensor with two dif-
ferent sensor systems submerged in the flow stream. This probe
is called the area-velocity (or AV) probe. It contains a pressure
transducer to measure level and a pair of ultrasonic transducers
to measure velocity. The flow meter then calculates flow based on
the cross-sectional area of the flow stream and its velocity. You
need only enter the dimensions of the flow channel. If you want,
you can also use the 4250 with a primary measuring device, as it
has built-in standard level-to-flow conversions that cover most
open channel flow measurement situations. You can enter an
equation, or sets of data points that plot a user-derived flow
profile for a flow stream. You can enter either velocity data points
or level/flow rate data points. The 4250 supports Flowlink,
Teledyne Isco's data acquisition, storage, and retrieval software.
Using Flowlink, the 4250 has enough memory to store 40,000
data readings. The optional 4200T Modem with speech capability
is available to transmit stored data over telephone lines.
The 4250 Flow Meter may be used with the following equipment:
Manufactured by Teledyne Isco:
• 3700 Series Sequential, Composite and Refrigerated
Samplers
• 6700 Series Portable and Refrigerated Samplers
• GLS Compact Portable Sampler
• 4-20 mA Output Interface
• Tipping Bucket Rain Gauge
• High-Low Alarm Relay Box
Non-Isco Equipment:
• IBM Personal Computer or compatible clone with Isco
Flowlink software
• Laptop Computer with Isco software
• YSI 600 Multi-Parameter Sonde
Optional Accessories:
• 4200T Modem - Speech-capable, with connector and
cable
• D.O. (dissolved oxygen), pH, and temperature
parameter probes
• Extension Cable (Vented) for the AV sensor, length of 25
feet. (Maximum distance between sensor and flow meter
with extension cables is 75 feet.)
• Quick-Disconnect Box for AV sensor (Increases
maximum distance between flow meter and sensor to
1000 feet.)
• Isco Flowlink Software for data acquisition, storage, and
management
• Mounting rings for the AV sensor