MNM 7510-A / Optima OP-900A SS Stainless NTEP Indicator Guide
- pete8781
- Jul 30
- 2 min read
MNM Scales: (832) 290-3120 • mnmscales@yahoo.com. Contact MNM for current display/power options, load-cell connector details, NTEP configuration and help choosing the correct indicator.
MNM 7510-A / Optima OP-900A SS Stainless NTEP Indicator Guide
The MNM 7510-A is listed as a stainless-steel weighing indicator based on the Optima OP-900A SS / OP-900-SS family, built for industrial scale systems that need NTEP capability, RS-232 communication, hold functions, counting, accumulation and a more durable enclosure than a basic plastic indicator.
Image note: official Optima OP-900-SS manufacturer imagery is used because MNM identifies the 7510-A listing as the Optima OP-900A SS family.
Verified MNM Listing Features
MNM lists stainless-steel casing; AC adapter included with battery optional; lb/kg weighing with additional g/oz/lb:oz availability on LCD versions; Gross, Tare, Pre-Set Tare and Zero; multiple Hold functions; count and accumulation weighing; overload/underload alarm; power saving; date/time; gravity adjustment; manual zero range; error warning; splash-proof keyboard/display; remote-display and printer connectivity; full-duplex RS-232; support for up to six 350-ohm load cells; mounting bracket/hardware; and a home-run connection cable.
NTEP and Display Resolution
MNM identifies the 7510-A as NTEP approved for 5,000 divisions and lists Certificate of Conformance 20-069. The listing also says the indicator can display up to 50,000 graduations for non-Legal-for-Trade industrial use. Do not confuse display capability with certified commercial division count; the configured application and approval determine what is legally usable.
Stainless Does Not Automatically Mean Waterproof
The MNM product title uses waterproof wording, but both MNM's feature list and Optima's official product literature describe the keyboard/display as splash-proof and do not publish an IP69K-style washdown rating on the sources used here. Treat the enclosure as a more durable stainless industrial indicator, but verify the exact environmental rating before direct hose-down or high-pressure sanitation use.
Load-Cell and System Compatibility
Optima publishes support for up to six 350-ohm load cells. A replacement still requires matching excitation/signal wiring, connector pinout, platform capacity and division, junction-box arrangement, and any remote display/printer wiring. After replacing an indicator, perform mechanical checks and recalibrate the complete scale system.
RS-232, Printers and Remote Displays
Full-duplex RS-232 makes the 7510-A/OP-900 family useful for printers, remote displays and computer integration. Confirm communication mode, baud rate, cable pinout and destination-device protocol. The official OP-900 manual includes communication parameters and print configuration; changes should be documented so service technicians can reproduce the setup later.
Manuals & Technical Documents
Frequently Asked Questions
Is the MNM 7510-A the Optima OP-900 SS family? MNM's listing explicitly names Optima OP-900A SS, and the published features closely align with Optima's OP-900-SS literature.
Is it NTEP? MNM lists NTEP 5,000 divisions and COC 20-069. Confirm the final scale configuration remains within the certificate and local legal requirements.
How many load cells can it power? Optima's official OP-900-SS page states up to six 350-ohm load cells.
Does it support Peak Hold? Yes. The official manual provides multiple Hold settings, including Peak, Manual, Auto, Average and Auto Average.
Can it connect to a printer? Yes. MNM and Optima both list printer connectivity and RS-232.
Is it safe for full washdown? Do not assume so from the stainless enclosure alone. The sourced literature says splash-proof; verify the required environmental/IP rating with MNM.
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