Series 900 Single & Dual Instruction Manual
Normally each System Electronics is carefully
The full scale value of the display can be adjusted using the Display Adjustment Potentiometers, R49 for Channel 1 and R48 for Channel 2. To adjust the span valve of the display, connect a precision 5 VDC input to pin 3 or a 20 mA input to pin 9 on the 20 pin connector for the appropriate channel. Adjust the correspond- ing potentiometer to change the span to the desired full scale value.
The location of the decimal point can be changed using jumpers located at J5 – J7. There is one set of jumper connectors for each channel. The following identifies the jumper number and decimal point location:
J – 7 | 1 digit | (1xx,x) |
J – 6 | 2 digit | (1x,xx) |
J – 5 | 3 digit | (1,xxx) |
5 MAINTENANCE
5.1 Display Adjustment
The Zen and Span Adjustment Potentiometers (R12 and R16) are | 5.2 |
factory adjustments used to set the individual meter to the system | Zen and Span Adjusted |
electronics. Sierra recommends that these potentiometers not be |
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adjusted in the field. Consult with Sierra’s Customer Service |
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Department at (408) |
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In the unlikely event of System Electronics malfunction, please | 5.3 |
contact our sales engineers or customer service at (800) | Factory Service |
outside California, or (408) |
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systems to: |
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Sierra Instruments, Inc. |
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5 Harris Court, Bldg. L |
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Monterey, CA 93940 |
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Attention: Service Department |
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Be sure to include complete return shipping instructions. IT IS |
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NOT POSSIBLE TO DELIVER PARCELS TO A POST OF- |
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FICE BOX. |
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In order to minimize the possibility of damage in shipment, the |
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system should be shipped in its original packing carton. If the |
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original carton is not available, follow this packing procedure: |
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1) place bail in front of the unit to protect the front panel; |
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2) leave rear panel header latches open; |
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3) pad all sides. |
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