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MASS-tron II/CEM
Air Monitor Corporation
116-004-94.P65 (8-31-10)
MASS-tron II/CEM
- IO&M Manual
SECTION 4 – INSTALLATION
11
4.6 – INPUT/OUTPUT SELECTION
Selections of input and output signal types are made on the Jumper section of the I/O board, see Figure 5.2. Remove
top cover to gain access to the Jumpers. Figure 4.7 depicts the Jumper board and the pins associated with specific
input and output signal types.
Figure 4.7
Table 4.1 lists the identifier for each row of pins to be jumpered for a specific input or output signal type.
Table 4.1
The necessary jumpers have been installed at the Factory for customer specified inputs and outputs (see Factory Set-
Up Information Sheet). The availability of inputs and outputs depends on options purchased.
To change the signal type of an available input or output, remove all jumpers from the present signal type pins and install
them on the desired signal type pins.
Inputs have a single jumper covering two pins, and outputs have two jumpers covering four pins.
4.7 – DISPLAY CONTRAST ADJUSTMENT
To compensate for different ambient lighting conditions and viewing angles, the MASS-tron II/CEM display's contrast
can be adjusted for optimum visibility.
Contrast is adjusted using potentiometer R1 on CPU board (see Figure 5.1). To gain access to R1:
• Remove the two 10-32 screws from front cover and pull the cover straight up and to the right.
• Turn R1 clockwise to increase contrast (darken characters relative to background) and counterclockwise to decrease
contrast.
Analog Output (AO-1)
(Transmitter AUTO-cal Reporting)
Analog Output (AO-2)
(Temperature)
Analog Output (AO-3)
(Absolute Pressure)
Analog Output (AO-4)
(Selectable)
Analog Input (AI-1)
(Temperature)
Analog Input (AI-2)
(Not Used)
4 to 20mADC
J10
J7
J4
J1
J16
J13
0 to 5 Volts
J11
J8
J5
J2
J17
J14
0 to 10 Volts
J12
J9
J6
J3
J18
J15
SIGNAL TYPE
Содержание MASS-tron II/CEM
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