Omega TX82B Manual de usuario
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OMEGA
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User’s Guide
TX82B
Panel Mounted
Current Loop Indicator
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TABLE OF CONTENTS
1.0 G N RAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 SP CIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.2 Accuracy at 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.3 Analog-To-Digital Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.5 nvironmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.6 Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.0 M CHANICAL ASS MBLY AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Intrinsic Safety Parameters for FM (Factory Mutual) . . . . . . . . . . . . . . . . . . . . . 4
3.3 Installation/Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.0 SIGNAL INPUT CONN CTIONS (P3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.0 CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1 Standard Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.2 Field Configuration Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.0 CUSTOM R CONFIGURATION AND CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . .9
6.1 Formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.2 Configuration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.4 Factory-Setup Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.0 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
ILLUSTRATIONS
Figure 3-1 xploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3-2 DIN Case Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 5-1 Main Board Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 7-1 Wiring Diagram for TX82B Usage for FM (Factory Mutual) . . . . . . . . . . . 11
i
UNPACKING INSTRUCTIONS
Remove the Packing List and verify that you have received all equipment,
including the following:
QTY D SCRIPTION
1 Current Loop Meter Indicator with all applicable connnectors attached.
1 Owner's Manual
1 Factory Setup Label
If you have any questions about the shipment, use the phone number for the
Customer Service Department nearest you.
When you receive the shipment, inspect the container and equipment for signs of
damage. Note any evidence of rough handling in transit. Immediately report any
damage to the shipping agent.
The carrier will not honor damage claims unless all
shipping material is saved for inspection. After
examining and removing contents, save packing
material and carton in the event reshipment is
necessary.
ii
1
1.0 GENERAL INFORMATION
Model TX82B two-wire current-loop indicator accepts 1-5 mA, 4-20 mA, or 10-50
mA process signals and digitally displays the process variable in percentage or
engineering units of such measurements as pressure, flow, temperature and level.
No separate power supply or power connections are required, since the TX82B
obtains operating power directly from the current loop with a voltage drop of less
than 2.5 V. It can tolerate current overdrives up to 200 mA forward and 1000 mA
reverse.
The compact TX82B circuit is mounted in a black polycarbonate case with the
standard 1/8 DIN panel-mount bezel and a depth of less than 110 mm (4.33 in).
Five 12.7 mm (0.5 in) high liquid crystal 7-segment digits are used to display
±1999 active counts plus one or two dummy right-hand zeros.
The TX82B displays from -1999 to 1999 counts with the option of one or two
dummy right-hand “0” digits. Zero suppression or elevation capability exceeds
full scale. Program jumpers are used to scale the readout for percentage or
engineering-unit display. Both zero and span are fine-tuned with multiturn
potentiometers accessible through the display board, requiring lens removal for
readjustment.
When removed from its case, the TX82B can be programmed with gas-tight
jumpers for three input ranges (1-5, 4-20 or 10-50 mA), four coarse zero ranges,
four decimal-point locations and the dummy right-hand zeros. Two additional
jumpers are provided to reverse the span slope so that increasing the input can
cause a reading decrease; thus a 4-20 mA input can be programmed to produce
a 2000 to -18000 reading when one dummy right-hand zero is also used.
2
2.0 SPECIFICATIONS
2.1 INPUT
Current 1-5 mA, 4-20 mA or 10-50 mA
Protection 200 mA max forward and 1000 mA max
reverse
Voltage Drop 2.5 V max forward and 1.2 V max reverse
Span Range 100 to 2000 counts continuous adjustment
with a multiturn potentiometer
Zero Range The multiturn zero potentiometer can displace
the displayed reading by ±500 counts from the
center of each of the four overlapping zero
ranges, provided that the resultant is within the
±1999 count display capability.
Span Slope Positive or Negative
Normal Mode Rejection
at 50/60 Hz 46 dB minimum
2.2 ACCURACY AT 25°C
Maximum error ±0.1% R ±1 count
Zero tempco ±0.1 ct/K typ, ±0.3 ct/K max
Span tempco ±0.005%S/K typ, ±0.015%S/K max
2.3 CONV RSION
Technique Dual-slope, average value with autozero
correction
Polarity Determined automatically at the end of input
integration period
Input integration period 100 milliseconds (nominal value)
Reading rate 2.5/second
3
2.4 DISPLAY
Type 7-segment LCD
Color Black digits with white background
Symbols -1.8.8.8.0.0, 12.7 mm (0.5 in) height
Polarity Minus sign
Overrange Three least-significant digits blank
xtra digits One or two dummy right-hand zeros,
jumper-selectable
Decimal points Four positions, jumper-selectable
Lifetime (to 2:1 contrast ratio) More than 30,000 hours
Temperature derating 2:1 for each 10°C above 60°C
Humidity derating 2:1 for each 10%RH above 60%RH
2.5 NVIRONM NT
Standard operating temp 0 to 55°C
xtended operating temp option
(conformally coated) -40 to +85°C
Humidity To 95% at 40°C
Bezel cover option Splash-proof
2.6 M CHANICAL
Weight 170 g (6 oz)
Case material Black polycarbonate, 94V-0 flammability rating
Case size
Bezel (HxWxT) 48 x 96 x 7.67 mm
Depth behind bezel
with mounting hardware Less than 110 mm
Panel cutout (HxW) 45 x 92 mm
lectrical connections 3-terminal screw clamp connector
Wire size 0.13 mm2- 2.5 mm2(AWG 26-14)
4
3.0 MECHANICAL ASSEMBLY AND INSTALLATION
3.1 SAF TY CONSID RATIONS
To ensure safe operation, follow the guidelines below:
VISUAL INSPECTION: Do not attempt to operate the instrument if damage
is found.
SIGNAL WIRING: Insert the proper plus and minus signal wires into the plug-in
screw-clamp connector terminals marked plus and minus. nsure that the wires
are securely clamped in the plug-in connector by rotating the screws in the
plug–in connector clockwise but do not exceed a torque of .5 newton-meter
(.37 pound-foot). Then plug the connector firmly into the socket located on the
rear panel of the meter.
RAIN OR MOISTURE: Do not expose the instrument to condensing moisture.
3.2 INTRINSIC SAF TY PARAM T RS FOR FM (FACTORY MUTUAL)
Certificate No. 2Y4A4.AX
V max=12.5 V,
Imax=250 mA
Intrinsically Safe for Class I, II and III, Division 1, Groups, A,B,C,D, ,F and G
hazardous locations.
Ci=8.6 µF
Li=0 mH
3.3 INSTALLATION/R MOVAL
The TX82B is housed in a 1/8 DIN case. The electronic circuitry can be installed or
removed from the front and is attached to the case with two M4 screws through the
rear panel.
Panel Mounting
1. Remove the two thumbnuts on the rear of the case.
2. Slide the sleeve off the case (see Figure 3-1 xploded View).
3. Verify the panel cutout dimensions in Figure 3-2 Case Dimensions. Insert the
case in the panel cutout from the front and slide the sleeve on from the rear.
Install the two thumbnuts to secure the sleeve to the case.
Main Board Access:
1. Case must be removed from sleeve.
2. Remove lens from case.
3. Slide main board from front of case.
Figure 3-1 Exploded View (include rear panel)
5
SL V
THUMBNUT
CONFIGURATION LAB L
(BACK SID OF DISPLAY BOARD)
THR AD D STUD
R AR PAN L
MAIN BOARD
DISPLAY
BOARD
FRONT L NS
L CTROSTATIC RISK
DO NOT RUN OR
CL AN WITH SOLV NT
J3 B
R AR CONN CTOR (P3)
FOR SIGNAL INPUT
1 2 3
ID. LAB L
CAS
PAN L
6
Figure 3-2. DIN Ca e Dimen ion
4.0 SIGNAL INPUT CONNECTIONS (P3)
The signal input connections for all meters are made at connector P3 as follows
(see Figure 3-1):
P3 Connection Signal
1 Signal Hi
2 Signal Lo
3 No Connection
4.15 [105.4] SL V
3.50 [88.9]
1.89 [48.0]
3.78 [96.0] 7.9 [0.31] MAX
CAS
TOP VIEW SIDE VIEW
PANEL CUT-OUT
[45.00 +0.61/-0.00]
R
PAN L THICKN SS:
1.772 +.024/-.000
3.622 +.032/-.000
[92.00 +0.81/-0.00]
[1.5]
0.06
4 PLCS
0.25 [6.4] MAX
0.03 [0.8] MIN
NOT S: DIM NSIONS AR IN INCH S [MILLIM T RS].
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