Cooper Instruments & Systems DFI Infinity CS Economy Digital Indicator - Manual (Page 19)

DFI INFINITY CS (V- M3598/N/0906) 16 CF 70
4.3.2 Scaling without Known Loads
To scale without known inputs, calculate input values based on transducer specifications and manually enter them
via the front-panel push buttons. The following example assumes load cells with these specifications:
Maximum
Load: 100.0 lbs
Output: 3.1 mV/V
Sensor Excitation: 10 Vdc
Output: 31 mV = (3.1 mV/V) x (10 V)
1. Determine the correct values for
and , based on the load cell specifications. In most cases, &
are equal to the minimum and maximum of the transducer output span. The example assumes &
are equal to the range of the load = 0 and = 100.0). Calculate and using the
load cell output span and the following equation:
= (Sensor Output) x (Natural Gain) x (Multiplier).
Table 4-3 Natural Gain
Input range Span units Natural gain
0 to 100 mV Millivolts 100 cts/mV
±50 mV Millivolts 40 cts/mV
0 to 10 V Volts 1000 cts/V
±5 V Volts 400 cts/V
0 to 20 mA Milliamps 500 cts/mA
2. Determine the multiplier by the Input Resolution setting (
in the menu) and the input range selected.
Typically is suitable for most applications.
Table 4-4 Input Resolution Multiplier
3. Determine
and input range and resolution. The example selects the 0 to 100 mV range and 10 uV
resolution ( ).
Example: = (0 mV) x (100 cts/mV) x (1.000) =0
= (31 mV) x (100 cts/mV) x (1.000) = 3100
= 0000
= 100.0
4. Press MENU button until the meter shows .
5. Press the X/TARE button. The meter shows .
6. Press the X/TARE button again. The meter shows the last Input 1 value, with the fourth digit flashing.
7. Press the S/NT/GRS button to change the value of your digits.
8. Press the X/TARE button to scroll horizontally to the next digit.
9. Press the MENU button to store this value. The meter shows .
10. Press the
X/TARE button. The meter shows the last value for Read 1.
Repeat steps 7, 8 and 9 until
, and have been displayed, verified, changed (if necessary) and
stored.
4.4 Using Reading Configuration
Refer to Table 6-1 for a summary list of menu configuration.
INPUT RANGE R.2 = 4 R.2 = 3 R.2 =2 R.2 = 1 R.2 =0
0 to 100 mV 1.000 2.000 3.333 5.000 10.00
0 to 10 V 1.000 2.000 3.333 5.000 10.00
0 to 20 mA 1.000 2.000 3.333 5.000 10.00
±50 mV 1.000 1.000 1.667 2.500 5.000
±5 V 1.000 1.000 1.667 2.500 5.000