Siemens milltronics ILE-37, Instruction Manual

7ML19985CW01

Milltronics ILE-37 – INSTRUCTION MANUAL

Page 9

Calibration

A Test Weight is a calibration reference used to simulate a material impact force (test 
rate) on the flowmeter sensing plate during the integrato span calibration. The test 
weight is also used to perform a test to verify that the flowmeter sensing head is level. 

The Test Rate should be 60 to 80% of the system design rate. 

To determine the test rate produced by a specific test weight, calculate:

Test Rate (TPH)  = Test Weight (grams)

65

1

 grams/TPH

Alternatively, to determine the test weight required for a specific test rate, calculate:

Test Weight 

=  65

1

 grams/TPH x Test Rate (in TPH)

e.g. If the test weight used with an E-40 flowmeter is 500 grams: 

Test Rate 

= 

500 grams

65 grams/TPH

=

7.65 TPH

LVDT Output 

Zero Adjustment (if required)

1.

Connect a voltmeter across the LVDT green and yellow (or yellow and white; 
hazardous LVDT) wires. 

2.

With no load applied to the sensing plate, observe the  V AC reading on the 

voltmeter. 

If the LVDT output is 0.10 ± 0.05  V AC, skip to Span Test, otherwise, proceed as follows: 

a. Loosen the locknut on the LVDT threaded core. 
b. Turn the core in/out of the LVDT until 0.10 ± 0.05  V AC is obtained. 
c. Tighten the locknut, ensuring the measured value is maintained. 

1.

Use 80 grams for A-40 flowmeters.

Note: 

Use metric tons per hour (t/h) or short tons per hour (STPH) as applicable for 

TPH.

Note: 

Ensure the new position of the LVDT core allows free movement within the 

LVDT bore.

± 0.05

± 0.05

0.100

LVDT

LVDT core

moving beam

locknut

increase

decrease

To Integrator 

LVDT EXC. 

or LVDT 

Conditioner Card