key and then pushing it again will decrement the value (^v key works as a toggle -- alternating between increment and decrement). To change the next digit first push the <NEXT> key. This will advance the flashing to the following digit. Use ^v key to change the value. After the desired High Scale setting is displayed, push SETUP key to enter that setting and go to setup Low Scale.

Setup For Low Scale

After setting a channel's High Scale, the next parameter to be set is Low Scale. This parameter determines what number will be displayed when the transducer puts out its minimum signal. For example, suppose a pressure transducer produces a 0Vdc to 5Vdc signal which corresponds to 10psi to 75psi. In this case the display should read 10 when 0Vdc is measured. To do this, set the Lo Scale=10.

On pushing SETUP key, the display will briefly read 'LO SCLE' (for "Low Scale"), and then show the present Low Scale setting. The flashing digit is the active digit. Use ^v key (as described in Setup For High Scale) to change the value. After the desired Low Scale setting is displayed, push SETUP key to enter that setting and go on to setup Offset.

Setup For Offset

After setting a channel's Low Scale, the next parameter to be set is channel offset. Offset is used for calibrating a channel to a transducer that outputs a signal other than zero at its low end. If a transducer happens to output a small signal at its low end excitation, then the OFFSET parameter is used to make the transducer's minimum signal appear to be zero e.g. if a flow transducer outputs a 0.130Vdc to 5.000Vdc signal which corresponds to a flow rate of 0 to 40 gal./min. Then to make the 0.130Vdc correspond to a display of 0, set OFFSET =0.130.

NOTE: If the input type is CURRENT, the Offset value is entered in milliamps.

If the input type is VOLTAGE, the Offset value is entered in millivolts.

After pushing SETUP key at the completion of Setup For Low Scale, the display will briefly read 'OFFSEt', and then show the present Offset value. The active digit will be flashing. Use the ^v key (as described in Setup For High Scale) to enter a desired OFFSET value. After the desired OFFSET value is displayed, push SETUP key to go to Tare setup.

Setup For Tare

After setting a channel's OFFSET, the next parameter to be set is channel's TARE. TARE is used if it is necessary to always subtract a value from a reading prior to displaying that reading. For example, suppose a pressure transducer always includes atmospheric pressure of 15 psi, and you only wish to display the pressure differential from atmospheric (a gage reading of 19psi is to be displayed as 4psi). To do this, enter the number you want subtracted from a measurement prior to displaying the measurement.

The display will first show 'tARE' after which the current TARE value will be

displayed. Use ^v key (ref. Setup For High Scale) to set the desired TARE number. Once the desired TARE value is displayed, push SETUP key to enter that value and go to setup Setpoint.

Setup For Setpoint

After setting a channel's TARE, the next parameter to be set is channel's SETPOINT. SETPOINT is used in Deviation Display mode. In this mode the display is given as PROCESS-SETPOINT. For example, if it is desired to show how Channel #1 temperature readings are varying from a target temperature of 212 degrees, then make the SETPOINT for channel #1=212.

When setting SETPOINT, the display will first show 'CHx SP', and then the current SETPOINT value. Use ^v key (ref. Setup For High Scale) to get the desired

Page 11

Page 12
Image 12
Omega DPS3100, DPS3200 manual Setup For Low Scale, Setup For Offset, Setup For Tare, Setup For Setpoint