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August 18, 2003 

8.

 

Carefully reinstall the printed circuit board into the front panel lid, aligning the 
LCD display pins with the connector in the printed circuit board, aligning the 
POWER LED with its socket in the lid, and aligning the READ switch with its 
opening in the lid. 

9.

 

Reinstall the READ switch cap and guard. 

10.

 

Reconnect all the internal cable connectors to the printed circuit board with the 
same orientation and position as recorded in Step 3. 

11.

 

Close up the Model 150A enclosure by retightening the four hold-down screws 
in the front panel lid, attaching the lid to the base. 

 
 

V.

 

WARRANTY 

All products manufactured by AMI are warranted to be free of defects in materials and 
workmanship and to perform as specified for a period of one year from date of shipment.  In the 
event of failure occurring during normal use, AMI, at its option, will repair or replace all products 
or components that fail under warranty, and such repair or replacement shall constitute a 
fulfillment of all AMI liabilities with respect to its products.  Since, however, AMI does not have 
control over the installation conditions or the use to which its products are put, no warranty can 
be made of fitness for a particular purpose, and AMI cannot be liable for special or consequential 
damages.  All warranty repairs are F.O.B. Oak Ridge, Tennessee, USA. 

VI.

 

RETURN AUTHORIZATION 

Items to be returned to AMI for repair (warranty or otherwise) require a return authorization 
number to ensure your order will receive proper attention.  Please call an AMI representative at 
(865) 482-1056 for a return authorization before shipping any item back to us. 

Summary of Contents for 150

Page 1: ...AMI has developed a special battery saver circuit which reduces the power drain from the batteries as more of the sensor becomes superconducting Power requirements decrease as LHe level increases A front panel POWER LED is provided to indicate sufficient battery power exists to make an accurate level reading The CE mark applies to the handheld unit and the European AC adapter The North American AC...

Page 2: ...ilitate mobility the Model 150A is equipped with a single standard DB9 connector which connects the instrument to a sensor Connect the LHe sensor wires to the DB9 connector terminals as follows Wire Color DB9 Pin Number Signal Name Red 1 I Yellow 6 V Black 7 I Blue 8 V IV OPERATION A Connect the instrument to the sensor via the sensor DB9 connector Refer to Figure 1 B Depress the READ push button ...

Page 3: ...3 August 18 2003 Fig 1 Model 150A ...

Page 4: ...sed NOTE The AC adapter is rated for connection to Category II mains voltages NOTE Only AMI approved AC adapters should be used on the device NOTE Only an authorized service representative should replace the factory installed batteries C As part of the routine maintenance keep the exterior surfaces of the instrument clean by gently wiping with a damp cloth moistened with a mild detergent VI CALIBR...

Page 5: ...ibration resistor Jumper the I and V contacts pins 6 and 7 on the sensor connector together and connect to the other side of the calibration resistor The value of the calibration resistor should be 4 56 ohms x the active length of the sensor in cm remember that the active length of AMI standard sensors is 1 inch less than the overall length 2 Temporarily install a short circuit using a clip lead o...

Page 6: ...nnected in accordance with the color code outlined in the installation section see table in installation section and Figure 1 If the cause of the problem cannot be located please call an AMI Technical Support representative at 865 482 1056 Our standard business hours are Monday through Friday 8 00 a m to 4 30 p m Eastern Time IV QUALIFIED SERVICE PERSONNEL QSP A ESD This instrument contains compon...

Page 7: ...the printed circuit board then disconnect them from the printed circuit board 5 Remove the READ switch cap and guard cap is pulled off and guard is unscrewed 6 Apply slight pressure to the POWER LED and READ switch from the front of the Model 150A and gently remove the printed circuit board from the back NOTE Gently removing the printed circuit board will ensure that the POWER LED disengages from ...

Page 8: ...perform as specified for a period of one year from date of shipment In the event of failure occurring during normal use AMI at its option will repair or replace all products or components that fail under warranty and such repair or replacement shall constitute a fulfillment of all AMI liabilities with respect to its products Since however AMI does not have control over the installation conditions ...

Page 9: ...l 150 Standards to which Conformity is Declared Safety EN 61010 1 2001 EMC EN55 022 2003 Class A EN61326 2002 EN61000 4 2 2002 8kV AD 4kV CD EN61326 2002 EN61000 4 3 2002 3V m 80 1000MHz EN61326 2002 EN61000 4 8 2001 30A m 50Hz I the undersigned hereby declare that the equipment specified above complies with the require ments of the aforementioned Directives and Standards and carries the CE mark a...

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