Customer Configuration and Calibration, Formula

6.0CUSTOMER 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.

6.1FORMULA

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 =

2.Determine the highest input current, I2, which is specified by the customer:

I2 =

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 =