Omega Engineering DP3300 Series - Manual (Page 16)

DP3300 Series User’s Manual
Page15
1. Connect a thermocouple calibration source to the unit.
2. Dial in 1100 degrees centigrade on the calibrator (Note: unit must be programmed for displaying in centigrade).
3. Adjust the gain pot (see diagram of rear view of instrument) on the back of the instrument until the display reads '1100'.
4. Short Channel #1's input with a wire or shorting bar (make sure to disconnect the calibrator so as not to damage it).
5. Push DATA key. The display will read '0002' --- or some other value.
6. Adjust offset pot on back of instrument (ref. Fig. 3) until the display reads '0000'.
7. Push PROG key once -- the display will show Cold Junction temperature.
8. Remove the shorting bar from Channel one input and connect the thermocouple calibrator again.
9. Repeat steps 2 through 7 till the unit reads proper temperature. Press ‘PROG’ key to step thedisplay to next Channel.
Input Range Setup (for current and voltage):
Voltage Range Setup (0-5vdc, 0-10vdc)
After calibration, the VOLTAGE range may be setup. The display will briefly show 'U rAnGE' (for "Voltage Range"). Then
the display will show the present setting. Use ^v key (ref. Setup For High Scale) to set the desired VOLTAGE value. Once the
desired VOLTAGE value is displayed, push SETUP key to enter that value and go to the next step.
Voltage Range Setup (for millivolt inputs)
For Millivolt input units (i.e. the units that have millivolt input option instead of thermocouples), the display will first show 'HV
rnGE' (for "High Voltage Range"). After the High Voltage range is set, the display shows 'LV rnGE' (for "Low Voltage
Range" i.e. for millivolt input). Enter values for respective inputs.
Current Range Setup
After the VOLTAGE range, the CURRENT range may be set. The display will briefly show 'C RANGE' (for "Current
Range") followed by previous value. Use ^v key (ref. Setup For High Scale) to set the desired CURRENT value. Once the
correct CURRENT range is displayed, push SETUP key to enter that value and return to 'SYS CH' display.
Correct Range Settings
Following RANGE values should be entered for various inputs:
INPUT RANGE Value
0-5 Vdc 5.000
0-10 Vdc 10.000
0-100 Mv 100.0
4-20 Ma. (loop current) 20.00
Setup Examples
Example #1: Use of the OFFSET Parameter
Setup for a 4-20ma transducer signal corresponding to 0-500 gallons of fluid (reading in 10th of a gallon resolution):
DECIMAL
POINT = 999.9 OFFSET = 4.000
HIGH SCALE = 500.0 TARE = 0.000
LOW SCALE = 000.0
Example #2: Use of the LOW SCALE Parameter
Setup for a 4-20ma transducer signal corresponding to 500-2000 degrees Fahrenheit temperature i.e. 500 degrees at 4ma and 2000
degrees at 20ma (one degree resolution):
DECIMAL
POINT = 9999 OFFSET = 4.00
HIGH SCALE = 2000 TARE = 0.000
LOW SCALE = 500