Texmate, Inc. Tel. (760) 598-9899 • www.texmate.com
UM-35-CL manual (UM04)
Page 3
SPAN Potentiometer (Pot)
The 15 turn SPAN pot is always on the
right side (as viewed from the front of the
meter). Typical adjustment is 100% of the
input signal range.
ZERO Potentiometer (Pot)
The Optional ZERO pot when installed
is always to the left of the SPAN pot
(as viewed from the front of the meter).
Typically it enables the displayed reading
to be offset ±100 counts.
Optional Face Plate Descriptors
To customize the face plate,
clear adhesive label containing
various popular descriptors may
be ordered� Choose the descrip-
tor desired, peel off the adhesive
backing and align the descriptor
in the center right of the face-
plate�
P�n�: DU-CASEDES
LO RANGE
HI RANGE
10%
SPAN Pot %
10%
10%
10%
10%
10%
Signal Span %
20%
30%
40%
50%
1
SPAN Adjust
Header position
Span Adjust Header
Span Adjust Header
Span Range Header
2
3
4
5
10%
10%
10% 10%
10%
60%
70%
80% 90%
100%
1
2
3
4
5
< Decrease Span Increase >
1 2
3
4 5
< Decrease Span Increase >
1 2
3
4 5
Equivalent
Circuit
Acts like a
150 Turn
Potentiometer
Low Range
High Range
Input LO
Input HI
HI
LO
SPAN RANGE Header
When this header is provided it works in
conjunction with the SPAn ADJUST Header by
splitting its adjustment range into a Hi and a
Lo range� This has the effect of dividing the
adjustment range of the SPAn pot into ten equal
10% steps across 100% of the input Signal Span�
Range
HI
LO
HI
LO
< Increase Span Decrease >
5 4
3
2 1
< I
ncre
ase
Spa
n D
ecre
ase
>
5 4
3
2 1
20%
SPAN Pot %
20%
20%
20%
20%
20%
Signal Span %
40%
60%
80%
100%
1
SPAN Adjust
Header position
2
3
4
5
< Decrease Span Increase >
1 2
3
4 5
Acts like 75 Turn 1 Mega ohm Potentiometer
Input LO
Input
HI
Equivalent
Circuit
SPAN ADJUST Header
This unique five-position header expands the
adjustment range of the SPAn pot into five
equal 20% steps, across 100% of the input
Signal Span� Any input Signal Span can
then be precisely scaled down to provide any
required Digital Display span from 1999 counts
to 001 (one count)�
ZERO ADJUST Header
When this header is provided, it works in
conjunction with the ZERO OFFSET RAnGE
Header, and expands the ZERO pot’s offset
capability into five equal negative steps or five
equal positive steps� This enables virtually any
degree of input signal offset required to display
any desired engineering unit of measure�
< Increase Zero Decrease >
5 4
3
2 1
< I
ncre
ase
Zer
o D
ecre
ase
>
5
4
3
2
1
Zero Offset Range Header
0 +
–
–20%
ZERO Pot %
–20% –20% –20% –20%
No
Offset
NEGATIVE OFFSET
POSITIVE OFFSET
–1200 or more counts
Offset Range
+20% +20% +20% +20% +20%
+1200 or more counts
5
ZERO Adjust
Header position
4
3
2
1
1
2
3
4
5
75 Turn Potentiometer
–
0
Equivalent
Circuit
< Increase Zero Decrease >
5 4
3
2 1
< Decrease Zero Increase >
1 2
3
4 5
75 Turn Potentiometer
+
0
Zero Pot
Disabled
ZERO OFFSET RANGE Header
When provided, this three position header
increases the ZERO pot’s capability to offset the
input signal, to ±25% of the digital display span�
For example a Negative offset enables a 1 to 5V
input to display 0 to full scale� The user can select
negative offset, positive offset, or no offset (ZERO
pot disabled for two step non-interactive span and
offset calibration)�
Offset
0
–
+
0
–
+
Zero Offset Range Header
0 +
–
No
Offset
NEGATIVE OFFSET
Decreases Digital Reading
POSITIVE OFFSET
Increases Digital Reading
15 Turn Potentiometer
–
0
Equivalent
Circuit
15 Turn Potentiometer
+
0
Zero Pot
Disabled
⊕
–
500 Counts
Offset Range
– 100% of Offset
ZERO Pot%
⊕
+
500 Counts
+ 100% of Offset
Signal Conditioning Compenets
24V DC Output Header
On some modules this header enables a 24V DC
125mA (max) Excitation/Auxiliary output to be
connected to Pin 3�
ON
OF
F
OFF
ON
24V EXC
