Operation

Average or Differential [MR 200 only]

For differential or average operation dual-point MultiRanger, set P001 to 4 (differential) or 5 (average) and connect two transducers of the same type.

All the relevant parameters are then indexed by the correct number:

Index

Description

2indexed by Transducer One or Two

3indexed by level measurement 1 = Transducer One

2 = Transducer Two

3 = Calculated Level (average or difference)

Measurement Conditions

The following information will help you configure your MultiRanger for optimal performance and reliability.

Response Rate

The response rate of the device influences the measurement reliability. Use the slowest rate possible with the application requirements.

The response rate is also important to functions connected to the filling or emptying indicators.

Dimensions [MR 200 only]

The dimensions of the vessel, wet well, or reservoir (except empty and span) are only important if you require volume.

Volume is required to report the level value in terms of volume. The pumped volume function can also report pumped volume or pump efficiencies.

Failsafe

The failsafe parameters ensure that the devices controlled by the MultiRanger default to an appropriate state when a valid level reading is not available.

P070 – Failsafe Timer activates if an error condition is detected. Upon expiration of the timer, relay status defaults to values based on P071.

P071 – Failsafe Material Level determines the level reading if the Failsafe Timer expires and the unit is still in an error condition.

P129 – Relay Failsafe controls the reaction of each relay. See Relay Failsafe on page 45 for more information.

If Failsafe Operation activates frequently, see the Troubleshooting Appendix on page 231.

Page 40

MultiRanger 100/200 – INSTRUCTION MANUAL

7ML19981FB06

Page 50
Image 50
Siemens instruction manual Measurement Conditions, Response Rate, Dimensions MR 200 only, Failsafe