KROHNE CORIMASS G-MFM 4085 EN - Manual (Page 78)

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7.1.2 Testing current output
This function allows a number of fixed current levels from 0 to 22 mA to be driven from the
current output. This function interrupts the normal operation of the output, so the operator will be
asked if he is sure before the test commences.
Press the
↵
key at any time to stop the test and return the output to normal operation.
Systems with two or more current outputs
From software G2.00 onwards programming of any current output will be by menus Fct. 1.3.0
and Fct. 3.3.0 (testing will be by menu Fct. 2.2) regardless of how many current outputs are
fitted. When programming (or testing) a system with two current outputs the operator must first
select the desired output number.
Fct. 3.(3).0 CUR.OUT.I
→
Fct. 3.3.0 CUR.OUT.I(1)
↑
Fct. 3.3.0 CUR.OUT.I(2)
Use the
↑
key to select the
desired output number
↵
Fct. 3.3.(1) FUNCTION I
Program the selected output
as normal
7.1.3 Testing pulse output
This function allows the frequency/pulse output to be tested. The frequency output has an open
collector transistor drive which requires a pull-up resistor to an external DC power supply. (Sect.
2.3). When this output is connected to the customer’s instrumentation, reliable operation can
only be ensured if the customer takes proper care to ensure the connection is properly screened
against external electrical interference. Therefore, it is important that this output connection
should be thoroughly tested before being put into use.
Key Display
line 1
line 2
Fct. 2.(1) TEST DISP.
↑
Fct. 2.(2) TEST I
→
SURE (NO)
↑
SURE (YES)
↵
(0 mA)
0 mA is output
↑
(2 mA)
↑
(4 mA)
↑
(10 mA)
↑
(16 mA)
↑
(20 mA)
↑
(22 mA)
↑
(0 mA)