TELEVAC MP2AR User manual

INSTRUCTION MANUAL
MP2AR Remote
Thermocouple Gauge
Range: 1-20,000 microns
TELEVAC
A DIVISION OF THE FREDERICKS COMPANY
2400 PHILMONT AVE.
HUNTINGDONVALLEY, PA 19006
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PARTS LIST
3
1
4
2
# QTY ITEM DESCRIPTION
1 1 2AR Remote Thermocouple Electronics
2 1 Cable (specified at ordering)
3 1 Instruction Manual
4 1 Sensor
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OPERATION ……………………………………….2
…………………………………………………………………
OPERATION ……………………………………………
INSTALLATION ………………………………………
S ………………………………………………………………
TABLE OF CONTENTS
SECTION TITLE PAGE
01. DESCRIPTION and INSTRUMENT
02. SAFETY ……………… …….3
03. PRINCIPLES OF SENSOR ……4
04. SENSOR OPERATION AND ……5
05. RECORDER OUTPUT ……..7
06. MAINTENANCE ………………………………………………………………………………8
07. CALIBRATION ……………………………………………………………………………… .8
08. TROUBLESHOOTING …………………………………………………………………….…8
09. SPECIFICATIONS ……………………………………………………………………………9
10. DIMENSIONS ………………………………………………………………………………..10
11. UNPACKING AND INSPECTION ………………………………………………………….11
12. WARRANTY INFORMATION ………………………………………………………………11
PLEASE READ THIS MANUAL THOROUGHLY BEFORE USING GAUGE. REPORT ANY
PROBLEMS IMMEDIATELY.
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CHAPTER 1 TELEVAC
Description and Instrument Operation
The MP2AR series Remote Module provides a compact stand-alone measurement solution for
applications that do not require traditional panel-mounted instrument readouts. These modules
can provide local readout and control or can be interfaced directly with a PLC, chart recorder, or
data acquisition system. The MP2AR series of instruments use the time proven reliable and
rugged TELEVAC 2A Sensor, which can be changed in seconds. These instruments operate from
low voltage DC and are easily integrated into the largest process system with a minimal effort.
Likewise, the MP2AR Remote Gauge can be used as a small stand-alone vacuum measurement
solution.
Features
Range 1-20,000 Microns
Sensors can easily and quickly be replaced
If required
Compact & rugged self-contained package
Fast system control with one setpoint
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Safety Instructions
CHAPTER 2 TELEVAC
START BY READING THESE IMPORTANT SAFETY INSTRUCTIONS AND NOTES collected here
for your convenience and repeated with additional information at appropriate points in these instructions
These safety alert symbols in this manual or on the Product rear panel mean
cautions - personal safety, property damage or danger from electrical shock.
Read these instructions carefully.
In these instructions the word “product” refers to the MP2AR and all of its approved parts and
accessories.
NOTE: These instructions do not and cannot provide for every contingency that may arise in
connection with the installation, operation, or maintenance of this product. Should you require
further assistance; please contact Televac at the address on the title page of this manual.
This product has been designed and tested to offer reasonably safe service provided in it’s
installed, operated and serviced in strict accordance with these safety instructions.
Failure to comply with these instructions may result in serious personal injury, including
death, or property damage.
These safety precautions must be observed during all phases of operation, installation, and service of this
product. Failure to comply with these precautions or with specific warnings elsewhere in this manual
violates safety standards of design, manufacture, and intended use of the instrument. Televac disclaims
all liability for the customer’s failure to comply with these requirements.
The service and repair information in this manual is for the use of Qualified Service
Personnel. To avoid shock, do not perform any procedures in this manual or perform any
Servicing on this product unless you are qualified to do so.
√READ Instructions – Read all safety and operating instructions before operating the product.
√RETAIN instructions – Retain the Safety and Operating Instructions for future reference.
√HEED warnings – Adhere to all warnings on the product and in the operating instructions.
√FOLLOW instructions – Follow all operating and maintenance instructions.
√ACCESORIES – Do not use accessories not recommended in this manual as they may require
a technician to restore the product to its normal operation.
To reduce risk of fire or electric shock, do not expose this product to rain or moisture.
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CHAPTER 2 (cont.) TELEVAC
Safety Instructions (cont.)
`
Objects and Liquid Entry – Never push objects of any kind into this product through
openings as they may touch dangerous voltage points or short out parts that could result in
a fire or electric shock. Be careful not to spill liquid of any kind onto the products.
Do not substitute parts or modify instrument.
Because of the danger on introducing additional hazards, do not install substitute parts or
perform any unauthorized modifications to the product. Return the product to Televac fo
r
service and repair to ensure that safety features are maintained. Do not use this product
if it has unauthorized modifications.
Principles of Sensor Operation
CHAPTER 3
Thermocouple Gauge
The 2A thermocouple gauge tube consists of a metal shell containing fine wire filaments of dissimilar
metals, which form a thermocouple. The thermocouple gauge measures absolute pressures by
determining the temperature of a heated wire as the surrounding pressure changes. The response of the
sensor depends on the gas pressure and type.
The range of these sensors is, 1 to 20,000 microns, (1 X 10-3 Torr to 20 Torr). The sensor housing is
constructed of stainless steel (or alternately nickel plated brass) capable of withstanding 150-psi
overpressure.
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CHAPTER 4 TELEVAC
SENSOR OPERATION AND INSTALLATION
1.0 Connect the gauge to the vacuum system.
NOTE: DO NOT TURN INSTRUMENTATION WHEN MOUNTING ON A THREADED INSTALLATION
TO INSTALL, USE A WRENCH ON THE FLATTED PORTION OF THE SENSOR TUBE
2.0 Assure that there are no leaks.
3.0 Apply 24 DC volt power between pin # 3 (+) and pin # 4 (-) of the connector cable.
4.0 Configure output lines; pin # 5 (for linear 1 output), pin # 8 (signal gnd) and pin # 7 (for non linear
output). The table of voltage versus pressure is shown in chapter # 5. The linear signal output is
10 volts at 1000 microns and decreases linearly to zero at zero microns. The non-linear signal
output is 10 volts at zero pressure and decreases non-linearly to 1.25 volts at 1000 microns.
5.0 Pump down the vacuum system while observing the LED display and the signal voltage reading
on the output. (see chapter # 5 for output values)
6.0 While the pressure is above 20 Torr the display will show “HI” and the signal output will
correspond to values given in chapter # 5, depending upon chosen output. As the pressure drops
below 1 Torr the red “MICRONS” LED lights and the displayed readings now drop from 990 down
to zero while the linear output voltage drops correspondingly from 9.90 Volts to zero.
7.0 The trip pressure for the setpoint relay can be displayed by pressing the “setpoint display” button
on the front panel of the instrument or by reading the Set Point voltage at pin # 9 of the cable
connector. The display will blink the reading until the button is pushed again or until it times out
automatically after 60 seconds. If the Set Point adjustment screw is turned to change the setting
the new value displayed will be retained in memory. The setpoint adjustment range is 0 to 20,000
microns. The relay contact connections are as follows; to the common # 6, # 1, normally open,
and # 2, normally closed.
8.0 If the display shows “-1” or “LO” then the gauge is out of adjustment. With a known vacuum of at
least 1 X 10-5 Torr, adjust the “Zero” adjustment screw on the front panel.
SEE NEXT PAGE FOR GAUGE DIAGRAMS
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DIGITAL 2AMP2AR REMOTE
SENSOR OPERATION AND INSTALLATION (cont.)
PIN# PIN OUTS
1 Relay normally open contact
2 Relay normally closed contact
3 +24 volt power
4 Power common
5 Linear signal output
6 Relay common contact
7 Non-linear signal output
8 Signal return
9 Setpoint output
CHAPTER 4 cont. TELEVAC
Phillips
Head
screw
Pin #s
Setpoint
display
Setpoint
adjust
LED
display
LED lights
for
microns
Zero
adjustment
screw
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CHAPTER 5 TELEVAC
Recorder Outputs
Pressure Voltage (linear) Voltage (non-linear)
1 0.01 9.84
5 0.05
9.41
10 0.1 8.92
20 0.2
8.03
30 0.3 7.23
40 0.4
6.63
50 0.5 6.13
60 0.6
5.69
70 0.7 5.31
80 0.8
4.95
90 0.9 4.63
100 1
4.37
150 1.5 3.37
200 2
2.89
300 3 2.23
400 4
1.88
500 5 1.67
1000 10
1.26
2000 10.2 1.02
5000 10.2
.92
10000 10.2 .90
20000 10.2
.88
MODULAR 2A (linear)
0
1
2
3
4
5
6
7
8
9
10
11
12
0 100 200 300 400 500 600 700 800 900 1000
PRESSURE (microns)
VOLTS
MODULAR 2A (linear)
0
1
2
3
4
5
6
7
8
9
10
11
12
0 100 200 300 400 500 600 700 800 900 1000
PRESSURE (microns)
VOLTS
MODULAR 2A (non-linear)
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
11.00
12.00
1 10 100 1000 10000 100000
PRESSURE (microns)
VOLTS
MODULAR 2A (non-linear)
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
11.00
12.00
1 10 100 1000 10000 100000
PRESSURE (microns)
VOLTS
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Maintenance
No maintenance is required beyond periodic replacement of a contaminated sensor. To replace the
sensor, remove the Philips head screw in the center of the instrument, then gently rock and pull off the
electronic assembly. Replace the old sensor with a new one, remount the electronics and replace the
Phillips head screw. DO NOT OVER TIGHTEN THE SCREW!
CHAPTER 6 TELEVAC
CHAPTER 7
Calibration
All instrumentation is calibrated at the factory. No further calibration at the customer’s facility should be
required, even if the gauge tube is replaced.
For a reliable recalibration at a later date, it is necessary to have a reference standard vacuum system
whose pressure is known to be accurate. For such a calibration, the instrument, sensor tube and cable
should be returned to the factory for re-certification. However, if the vacuum calibration verification must
be done at the customer’s facility, a knowledgeable electronics technician trained in vacuum calibration
should operate equipment of certifiable accuracy.
CHAPTER 8
Troubleshooting
1. If display consistently displays “HI”, the pressure maybe above 20 20,000 microns. If a broken filament
is suspected, check for continuity between pins # 1 & # 8 and # 2 & # 7 on the sensor.
NOTE: If, after doing some or all of the above, the units are still inoperative, return to the factory for
repair.
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CHAPTER 9 TELEVAC
Specifications
Measurement range Temperature
1 to 20,000 microns Operating +15° to + 50°C
Bake out at 200°C (with electronics
removed)
Calibration Medium Electronics Module
Dry air or nitrogen Required Power
24VDC @ 100mA (customer supplied)
Materials Set point Relay
Stainless steel or nickel-plated brass Form C contact - 24 V .5 A rating
Overpressure Accuracy
150-psi +/- 1 micron 0 to 10 microns
+/-10% of reading 10 microns to
100 microns
+/- 20% of reading 100 microns to
1000 microns
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CHAPTER 10 TELEVAC
Dimensions
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CHAPTER 11 TELEVAC
Unpacking and Inspection
Before each unit is installed or operated, a quick inspection should be performed and the
following noted:
a. damage to the unit (scratches, nicks, dents, cracks, etc.)
b. missing: screws, switches or switch hardware
c. broken barrier strips, etc.
d. broken or loose components within instrument
Should any of the above problems be encountered, contact the factory immediately. Any
unauthorized repairs will void the warranty.
CHAPTER 12
Warranty information
The Televac division warrants instruments and components to be free of defects in material and
workmanship for a period of one year after the date of shipment unless otherwise specified in
the quotation pr product literature. No salesman, Representative or agent of the Fredericks
Company, or its divisions is authorized to give any guarantee or warranty or make any
representation in addition or contrary to those stated herein.
Other than those expressly stated herein, there are no other warranties of any kind, express
or implied and specially excluded but not by way of limitation, are the implied warranties
of fitness for a particular purpose and merchantability. It is understood and agreed the
seller’s liability whether in contract, in tort, under any warranty, in negligence or
otherwise shall not exceed the return of the amount of the purchase price paid by the
purchases and under no circumstances shall seller be liable for special, indirect,
incidental or consequential damages. The price stated for the equipment is a
consideration in limiting seller’s liability. No action regardless of form, arising out of
transactions of this agreement may be brought by purchase more than one year after the
cause of action has accrued, seller’s maximum liability shall not exceed and buyer’s
remedy is limited to either (1) repair or replacement.
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