3.5 Linear or Square Root Function
Selection
Model X54-201L provides a display which is a
linear representation of the input, and Model X54-
201SR provides a display which is the square root
function of the input. The square root display
versus the input current can be found as follows:
DISPLAY = (mA
–
4 mA) ÷ 16 mA × Display
Range + Display Zero;
Or,
DISPLAY = 0.25 mA Input – 4 × Display Range
+ Display Zero.
In order to change the X54-201’s function from
linear to square root, or vice versa, the module
must be removed from its enclosure as the
function jumper plugs are located on the bottom
board. The jumpers are located at JP1 and JP2
3.2 Span Selection
Refer to Table 3-1 to obtain the spans shown in
the left column which indicates the positions of
SW1-1 through SW1-5. For example, a span of
2.00, 20.0 or 200, SW1-2 and -5 are set to the ON
position and SW1-1, -3 and -4 are OFF.
3.3 Zero Selection
Table 3-2 indicates which positions of SW2-1
through SW2-6 and S1-6 are set to ON to obtain
the zero offset, in digits, indicated in the columns
directly below the switch. The indicated offsets are
additive, i.e., two or more of the switches may be
set to their ON position to obtain the sum of their
indicated offsets. The display span is located in
the left column, then the offset digits are found in
the same row as the display range. When the
desired offset digits are found, the switch or
switches, at the head of the column(s) should be
set to the ON position.
When changing spans or offsets, the zero and
span controls will need to be fine tuned to obtain
the specified accuracy. See Section 4.0
Calibration, for a procedure to adjust the zero and
span controls.
3.4 Decimal Point Selection
The decimal point position is selected by the
position of the DP-jumper plug located at the
lower left edge of the display board. The jumper
plug can be placed in any one of the following four
positions: 0, 1, 2 or 3, and corresponds to (0) no
decimal point, (1) one digit to the right of the
decimal point, (2) two digits to the right of the
decimal point, or (3) three digits to the right of the
decimal point.
√
√
SW1-1
SW1-2
SW1-3 SW1-4
SW1-5
1.00, 10.0, 100
Off
Off
Off
On
On
1.40, 14.0, 140
Off
Off
On
Off
On
2.00, 20.0, 200
Off
On
Off
Off
On
3.00, 30.0, 300
On
Off
Off
Off
On
4.00, 40.0, 400
Off
Off
Off
Off
On
5.00, 50.0, 500
Off
Off
Off
On
Off
7.00, 70.0, 700
Off
Off
On
Off
Off
10.00, 100.0,
Off
On
Off
Off
Off
1000
15.00, 150.0,
On
Off
Off
Off
Off
1500
19.99, 199.9,
Off
Off
Off
Off
Off
1999
Display Spans
Digits ± 20%
Selection of Span Switches, SW 1
SW2- SW2- SW2- SW2- SW2- SW2- SW1-
1
2
3
4
5
6
6
1.00, 10.0,
5
10
20
40
80
160
–
60
200
100
*120
1.40, 14.0,
7
14
28
56
110
220
–
90
275
140
*160
2.00, 20.0,
10
20
40
80
160
320
–
125 400
200
*240
3.00, 30.0,
15
30
60
120
240
480
–
190 600
300
*360
4.00, 40.0,
20
40
80
160
300
600
–
230 760
400
*460
5.00, 50.0,
25
50
100
200
400
800
–
100 1000
500
*600
7.00, 70.0,
35
70
140
280
560
1120
–
140 1300
700
*1300
10.00, 100.0, 50
100
200
400
800
N/A
–
200 1000
1000
*1000
15.00, 150.0, 75
150
300
600
N/A
N/A
–
300 500
1500
*500
19.99, 199.9, N/A
N/A
N/A
N/A
N/A
N/A
–
360 N/A
1999
Display
Spans
Digits
± 20%
Max.
Offset
Digits Offset Vs Offset Switches, SW2 and SW1-6
* Equals Square Root Mode.
Note:
Offset of 2 or more switches may be combined.
Table 3-2:
Digits Offset.
JP1 Position
JP2 Position
Jumpered
Jumpered
Linear
1,2
1,3
Square Root
Not used
1,2,3,4
Table 3-3:
JP1 and JP2 plug positions for selection of linear or square root
function.
3
Table 3-1:
Selection of Span Switches, SW1
