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Series 900 Single & Dual Instruction Manual
Page 7
Normally each System Electronics is carefully set-up at Sierra
Instruments and needs no maintenance. Individual transducers
may need periodic maintenance. Refer to transducer manuals for
the proper procedure.
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)
The Zen and Span Adjustment Potentiometers (R12 and R16) are
factory adjustments used to set the individual meter to the system
electronics. Sierra recommends that these potentiometers not be
adjusted in the field. Consult with Sierra’s Customer Service
Department at (408) 373-0200 for assistance.
In the unlikely event of System Electronics malfunction, please
contact our sales engineers or customer service at (800) 866-0200
outside California, or (408) 373-0200 inside California. Ship all
systems to:
Sierra Instruments, Inc.
5 Harris Court, Bldg. L
Monterey, CA 93940
Attention: Service Department
Be sure to include
complete return shipping instructions. IT IS
NOT POSSIBLE TO DELIVER PARCELS TO A POST OF-
FICE BOX.
In order to minimize the possibility of damage in shipment, the
system should be shipped in its original packing carton. If the
original carton is not available, follow this packing procedure:
1) place bail in front of the unit to protect the front panel;
2) leave rear panel header latches open;
3) pad all sides.
5
MAINTENANCE
5.3
Factory Service
5.1
Display Adjustment
5.2
Zen and Span Adjusted