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Page 38
MERCAP – INSTRUCTION MANUAL
7ML19981CM01.1
Example 4
This situation involves the re-adjustment of the LRV where the actual value is determined to
be 17% and the measurement shows e.g. 14%. Assume that the URV was set to 240 pF.
1.
Switch on the 275 and establish connection with the MST9500.
a.
Select:
Online
b.
Select:
PV
The measured value can now be read continuously.
2.
Write down the measured value in pF, e.g. 80 pF.
3.
We now calculate 100-17=83%.
We calculate 240-80=160pf.
We calculate 160/83=1.927
100 % will be 100 x 1.927= 192.7pF
The new LRV should be 240-192.7=47.22 pF.
4.
Adjust URV and LRV according to Example 2
Example 2
Example 2
Example 2, whereby the URV value is simply copied.
If the D.C.S. and/or the 275 are fitted with the Device Descriptor for the MST9500, more
functions can be used.
The available functions are:
Number
Number
Number
Number
Description
Description
Description
Description
(48)
Read Additional Transmitter Status
(38)
Reset Configuration Changed Flag
(128)
Set Alarm Select
(129)
Adjust for Product Build-up on Sensor
(130)
Set Sensor Upper Limit (USL)
(131)
Set Sensor Lower Limit (LSL)
(132)
Write Sensor Limit Values (USL/LSL)
(140)
Write SV Units and Range Values
(141)
Read SV Units and Range Values
(144)
Reset recorded PV min./max values back to PV
(145)
Show recorded PV min./max. values
(146)
Set ratio for Span
(147)
Read ratio for Span
(148)
Set ratio for Zero
(149)
Read ratio for Zero