Omega DPS3100 - Manual (Page 12)

Page 11
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