Contrex MLP-Trim Manual de usuario descargar pdf (Pagina 62)

3 - 22

Follower Mode Examples A and B

Example A demonstrates how scaling and setpoint Control Parameters are entered for

a typical Follower mode of operation that uses a ratio setpoint:

The Lead pump delivers 10 gallons/minute when the motor is running at

a maximum RPM of 1725. The Lead sensor shaft is equipped with a 60

tooth Ring kit. The Follower pump delivers 30 gallons/minute when the

motor is running at a maximum RPM of 1800. The Follower sensor

shaft is equipped with a 30 tooth Ring kit. Follower Setpoint 1 will be

set so that when the Lead pump delivers 5 gallons/minute, the Follower

pump will deliver 15 gallons/minute. Follower Setpoint 2 will be set so

that when the Lead pump delivers 5 gallons/minute, the Follower pump

will deliver 22.5 gallons/minute.

Table 3-17 shows the Control Parameters that would be entered in the MLP–Trim for

Example A.

To find the ratio for the Follower Engineering Units (CP-21) for Example A:

Follower E.U. at Max Follower RPM 30

Follower E.U. (CP-21) =

_____________________________________________________

___

Lead E.U. at Max Lead RPM 10

30 gal / min The Follower Engineering Units when the Follower is operating

at the maximum RPM.

Divided by

10 gal / min The Lead Engineering Units when the Lead is

operating at maximum RPM.

Equals

3.00 Follower Engineering Units (CP-21) as a ratio of Follower to

Lead.

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 215 216

Sin comentarios

Contrex MLP-Trim Manual de usuario Pagina 62