Omega TX82B - Manual (Page 13)

9
6.0 CUSTOMER CONFIGURATION AND CALIBRATION
Use this procedure to determine the configuration of the TX82B customized
setup. The procedure is general; customers can specify any two current inputs
and their corresponding digital readings. Pin-groups are shown in Figure 5-1.
6.1 FORMULA
Base all your calculations on either the 1-5, 4-20 or 10-50 mA range.
1.
Determine the lowest input current, I1, which is specified by the customer:
I1 = mA
2. Determine the highest input current, I2, which is specified by the customer:
I2 = mA
3. Determine the reading, N1, at input current I1, which is specified by the
customer.
N1 = counts
4. Determine the reading, N2, at input current I2, which is specified by the
customer:
N2 = counts
5. Calculate the Gain, G1:
(N2 - N1)
G1 = = counts per mA
(I2 - I1)
(If G1 is greater than 125, it is out of range for a standard unit.)
6. Calculate the Required Zero Range number, RZR:
RZR = N1 - (I1 x G1) =
7. Select the Zero Range required from the following chart where the Required
Zero Range number falls between the upper and lower limits of that range:
ZR1 = -2510 to -1420
ZR2 = -1580 to -420
ZR3 = -470 to +850
ZR4 = +760 to +2000
ZR =