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Model 2000 Flow Computer Instruction Manual

3.0

INSTALLATION, INITIALISATION & CALIBRATION

Model 2000 issue 21

Page No

INSTALLATION, INITIALISATION & CALIBRATION

3.1.

MECHANICAL INSTALLATION

The outline chassis dimensions are given in figure 3 and provide for mounting in either a panel or standard rack. Under
normal ambient conditions no special ventilation requirements are necessary. Where the Model 2000 may be subject to high

ambient temperatures- e.g. near heat producing apparatus or in direct strong sunlight. Adequate ventilation should be
provided. The operating environment should be clean, dry and free from a corrosive atmosphere.

3.2.

ELECTRICAL INSTALLATION

3.2.1.

POWER SUPPLY

A power supply with a dc. voltage of between 21 V and 28 V is connected to the terminal block on the rear panel of the

Model 2000 ensuring that the polarity is as marked. Ensure that a 3.15A fuse is fitted in the fuse holder located above the
terminal block. The Model 2000 Flow Computer must be connected to a suitable Ground or Earth Connection via the Earth
Stud located at the rear of the chassis. See Figure 2 for details.

3.2.2.

TRANSMITTER INPUT CONNECTIONS

The input transmitter circuits are connected to the Model 2000 via the 32 way terminal connections on the rear panel of the
Model 2000. Before any of the transmitters are connected reference should be made to the instrument instruction manuals
applicable to the individual transmitters.

WARNING:
IN HAZARDOUS ENVIRONMENTS A TRANSMITTER MUST BE CONNECTED IN ACCORDANCE WITH THE SAFETY

CERTIFICATE CONDITIONS SPECIFIED FOR THE INDIVIDUAL TRANSMITTER.

3.2.3.

HART TRANSMITTER INPUT CONNECTIONS

The Hart transmitters are connected in parallel as a multidrop system and each transmitter must have a different address. It
is essential that the transmitters have their addresses programmed and the burst mode operation turned off before they are

connected to the Model 2000 using the Rosemount Smart Family Interface Model 268 or similar interface. All transmitters on
the same Hart Loop must be assigned different short addresses it is recommended that the pressure transmitter must be
programmed with a short address of 01 and the temperature transmitter with a short address of 02. Refer to the Rosemount

operating manuals for the programming procedures.

To interface with the hazardous area Measurement Technology Ltd barrier types Model MTL3046B and Model MTL 5042

are recommended to be used.

Methods of connecting transmitters are given in figure 18 and 22 and the connector pin designations are given in Appendix

3.2.4.

OUTPUT SIGNAL CONNECTIONS

The output signal connections are via the 32 way terminal on the rear panel and the connector pin designation is given in
Appendix 4.

3.3.

INITIALISATION

3.3.1.

INTERNAL SWITCHES

Before the Model 2000 can be operated it is necessary to set the internal mode switches to the required positions. To gain
access to the mode and security switches remove the small plastic cover on the left hand side of the Model 2000 (As shown
in figure 16). When setting the switches, care should be taken to minimise the handling of any circuit board within the Model

2000 to avoid the possibility of any electrostatic damage to the integrated circuits.

3.3.2.

SETTING THE INTERNAL SWITCHES

Each mode switch is set by pushing the coloured slider to the position required. The functions are given below:-
Normal RUN mode:-

Switch No.

OFF

Security 1 Off

Security 1 On

Security 2 Off

Security 2 On

3 Run

Mode