Operating Manual

Chapter 1 Introduction Accu-Wave

1-2 TN Technologies

Measurement accuracy, however, is degraded when the process level is above the bottom

of the probe.

Approvals

The Accu-Wave has been certified for use in hazardous locations as follows (approvals are

pending as of 1 March 2000):

• Class I, II, III, Division 1, Groups B, C, D, E, F, G

• Class I, II, III, Division 2, Groups B, C, D, F, G

• NEMA 4X

CSA

• Class I, II, III, Division 1, Groups B, C, D, E, F, G

• Class I, II, III, Division 2, Groups B, C, D, E, F, G

• TYPE 4X

CENELEC

• EEx d IIB + H

• Eex n IIB + H

See Appendix C for additional information regarding specifications and safety approvals.

Note: Verification of chemical compatibility with the exposed antenna materials

is ultimately the responsibility of the customer.

Sensor-Transmitter

The sensor and transmitter are integrated on the single electronics board. The transmitter

detects the signal reflected from the process material. The detected echo is used to measure

the distance to the process material and to calculate other measurement values. These

values can be displayed, sent to the serial ports (RS-485 standard, RS-232 optional), and

can be used to drive the current output or process alarms.

The RS-485 and optional RS-232 serial ports support communications from a PC with the

Accu-Wave Window’s based Setup Software, a PC with terminal emulation software, or a

TN Technologies' Hand Held Terminal a remote terminal.

The Accu-Wave supports 4-20 mA current output, serial communications, contact closure

input, and a 2-line local/remote display. The Accu-Wave inputs and outputs are

summarized in the following Input/Output Characteristics Table.