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PRODUCT DESCRIPTION
Reciprocating cylinder pressure monitor
Bently Nevada 3500/77M is a reciprocating cylinder pressure monitor. The monitor conditions pressure-transducer signals for reciprocating compressor cylinder measurements and alarms. Calculated values include chamber pressures and rod-load indicators. Correct transducer calibration, mechanical parameters and speed setup are necessary; the module is not a generic input for arbitrary pressure sensors.
The 3500/77M family uses front module 176449-07 with the specified cylinder-pressure I/O. This family-only record does not confirm the supplied termination or approval option. Verify the actual module, pressure transducer calibration and complete compressor configuration before replacement.
The 3500/77M family uses front module 176449-07 with the specified cylinder-pressure I/O. This family-only record does not confirm the supplied termination or approval option. Verify the actual module, pressure transducer calibration and complete compressor configuration before replacement.
BEFORE YOU BUY
Confirm the complete installed configuration
ACTUAL APPLICATIONS
Applications for 3500/77M compressor monitoring system
These applications describe manufacturer-documented family use. They do not establish that this exact ordering code was installed at a named customer site.
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01 · CYLINDER PRESSURE
Compressor chamber operating values
The module evaluates suction, discharge, minimum and maximum pressure together with compression ratio. Use the appropriate approved transducer and pressure calibration for each monitored chamber. -
02 · ROD LOADING
Compression and tension calculations
Peak rod compression and tension combine channel measurements with configured mechanical parameters. They are calculated values, not direct force-sensor inputs. -
03 · ROD REVERSAL
Pressure-based compressor diagnostics
Degree of rod reversal is another derived value for the reciprocating compressor. Correct mechanical setup and the required speed range are prerequisites for interpreting it.
Technical specifications for 3500/77M
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Product Model3500/77M
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Spare Model140734-07
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Product ParametersReciprocating cylinder pressure monitor
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In stock4 units
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ManufacturerBently Nevada
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Input channelsOne to four
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Transducer typeBently-approved positive-voltage pressure transducers
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Frequency response0-5.5 kHz
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Input impedance50 kohm
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Power consumption7.8 W with transducer supplies at full load
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Pressure accuracy at 25 deg C+/-0.5% of transducer full range
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Buffered output impedance550 ohm
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Buffered signal conversionInverted and offset by -2.265 Vdc
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Transducer supply+23.0 +/-0.8 Vdc
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Per-channel current limiting24.5 mA
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Operating temperature-30 to +65 deg C with specified cylinder-pressure I/O
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Storage temperature-40 to +85 deg C
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Humidity95%, noncondensing
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Rack allocationOne full-height front slot
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Standard minimum speed60 rpm; MOD 135M8200-01 required down to 30 rpm
View all additional
Alternative Names
3500/77M
3500/77M reciprocating cylinder pressure monitor
Bently Nevada 3500/77M
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
RECIPROCATING CYLINDER PRESSURE MONITOR
Integrating 3500/77M
The monitor conditions pressure-transducer signals for reciprocating compressor cylinder measurements and alarms. Calculated values include chamber pressures and rod-load indicators. Correct transducer calibration, mechanical parameters and speed setup are necessary; the module is not a generic input for arbitrary pressure sensors.
Use only the documented approved positive-voltage transducer arrangement. The reference requires monitor firmware L, Rack Configuration 3.00, 3500/02 version 2.30 and 3500/03 version 1.30 or later. A 30 rpm minimum requires modification 135M8200-01, not standard hardware alone.
Follow user guide 146282, transducer calibration and field-wiring requirements. Enter the actual pressure/voltage calibration points and compressor mechanical parameters. Select the correct internal or external I/O; external blocks and cables must be separately ordered for an external arrangement.
Features:
- Match monitor generation, matched front and rear assemblies, wiring and software
- Follow the applicable installation instructions
- Confirm unverified configuration details
The 3500/77M reciprocating cylinder pressure monitor requires appropriate configuration before system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
Replacement of 3500/77M requires comparing monitor generation, matched front and rear assemblies, wiring and software. A shared base family or similar appearance does not establish a drop-in replacement for the complete ordered assembly.
Use only the documented approved positive-voltage transducer arrangement. The reference requires monitor firmware L, Rack Configuration 3.00, 3500/02 version 2.30 and 3500/03 version 1.30 or later. A 30 rpm minimum requires modification 135M8200-01, not standard hardware alone.
No verified exact-order discontinuation date, product revision or designated successor is asserted. Document revisions identify the reference literature, not hardware changes to the supplied product. Unconfirmed replacement options must be resolved before substitution.
Features:
- Preserve the complete ordering identity
- Compare the installed electrical and mechanical interfaces
- Do not infer hardware revisions or successor models
The 3500/77M reciprocating cylinder pressure monitor requires replacement verification against the complete installed configuration and current manufacturer documentation.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: No verified product PDF is currently available on this page. Amikong-hosted reference documents will be listed only after their product identity and scope have been checked. Consult the applicable manufacturer instructions before use; additional documents are included only when expressly listed in the quotation.Features:
- Verify document identity before procurement or installation
- Match the complete order to the manufacturer document scope
- Accessories are supplied only when listed in the quotation
Documentation for the 3500/77M reciprocating cylinder pressure monitor must be checked for document applicability before installation or commissioning.
Also searched as
Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed size2.5x25.5x24.5cm
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Shipping weight0.82 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference9031900090
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OriginUSA
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
Antistatic protection -
Tracking supplied
Established couriers -
Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 3500/77M
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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How is 3500/77M identified?
The 3500/77M family uses front module 176449-07 with the specified cylinder-pressure I/O. This family-only record does not confirm the supplied termination or approval option. Verify the actual module, pressure transducer calibration and complete compressor configuration before replacement. -
What is the function of this component?
The monitor conditions pressure-transducer signals for reciprocating compressor cylinder measurements and alarms. Calculated values include chamber pressures and rod-load indicators. Correct transducer calibration, mechanical parameters and speed setup are necessary; the module is not a generic input for arbitrary pressure sensors. -
Which installed equipment must be matched?
Use only the documented approved positive-voltage transducer arrangement. The reference requires monitor firmware L, Rack Configuration 3.00, 3500/02 version 2.30 and 3500/03 version 1.30 or later. A 30 rpm minimum requires modification 135M8200-01, not standard hardware alone. -
Where is this component used?
The module evaluates suction, discharge, minimum and maximum pressure together with compression ratio. Use the appropriate approved transducer and pressure calibration for each monitored chamber. -
What must be checked during installation?
Follow user guide 146282, transducer calibration and field-wiring requirements. Enter the actual pressure/voltage calibration points and compressor mechanical parameters. Select the correct internal or external I/O; external blocks and cables must be separately ordered for an external arrangement. -
Are buffered outputs identical to the transducer voltage?
No. With cylinder-pressure I/O the buffered outputs are inverted and offset by -2.265 Vdc. Account for that documented transformation when connecting diagnostic equipment. -
Are rod compression and tension measured directly?
No. They combine pressure-channel values with configured mechanical parameters. Their validity depends on those inputs and the complete compressor setup.
READY TO VERIFY YOUR PART?
Get a 3500/77M quote with price, lead time and revision check.
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