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Sartorius Gem GE412 User Manual

Sartorius Gem GE412
56 pages
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WTE5001-e03101
Service Manual
Sartorius Talent | Gem, Gold
TE Models
Electronic Analytical and Precision
Balances and Precious Metal Scales
Including Service Specification Sheets
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Sartorius Gem GE412 Specifications

General IconGeneral
Maximum Capacity410 g
Readability0.01 g
Pan SizeØ 120 mm
CalibrationExternal
DisplayLCD
Power Supply115/230 V, 50/60 Hz
Linearity±0.02 g
Response Time (typical)2 seconds
Weighing Unitsg, ct, dwt, oz, lb
InterfaceRS-232
Operating Temperature10°C to 30°C
WeightApproximately 1.5 kg
Repeatability (Std. Dev.)≤ 0.01 g

Summary

General Notes and Service Procedures

Maintenance and Service Operations

Service Software Requirements

Requirements for using service software for adjustments and avoiding outdated versions.

Models with Special Weighing Systems - Part 1

Models with Special Weighing Systems - Part 2

Models with Special Weighing Systems - Part 3

Models with Special Weighing Systems - Part 4

Auxiliary Service Tools and Equipment Reference

Essential Service Software and Cables

Lists Sartorius service software, BPI connection, and RS232 cables with part numbers.

Recommended Weights for Calibration - Part 1

Weight Sets for TE & GD Models

Lists required weight sets (accuracy, grams, catalog no.) for models TE214S, TE212, TE124S, GD603, TE64, TE313S, GD103, GD252.

Weight Sets for TE & DS Models

Lists required weight sets for TE153S, TE153S-DS, TE612, TE612-L, TE412, TE412-L, GE412.

Recommended Weights for Calibration - Part 2

Weight Sets for GE & TE Models

Lists required weight sets for GE812, TE1502S, GE2102, GE1302, TE3102S.

Weight Sets for TE, GE, and GD Models

Lists required weight sets for TE6101, TE4101, GE4101, GE7101, TE2101, GE2101, TE601, GE811.

Recommended Weights for Calibration - Part 3

Weight Sets for TE & GE Models

Lists required weight sets for TE12000, TE6100, TE4100 models.

Operating the Menu Access Switch

Activating the BPI Mode for Service

Requirement for BPI Mode Activation

BPI mode must be activated before working with service software for adjustments.

Detailed Steps for BPI Mode Activation

Procedure including disconnecting power, removing parts, and connecting cables.

Completing BPI Mode Activation

Performing Self-Test and Entering BPI Mode

Steps to replace pan, turn on, press button for self-test, and wait for BPI mode.

Balances/Scales with Strain Gauge Systems - Preparations

Required Checks and Adjustments List

Lists items to check and adjust: overload stop, zero point, repeatability, off-center error, span, linearity.

Checking and Adjustment Sequence - Overload Stop

Checking the Overload Stop

Overload stops checked after strain-gauge system replacement; requires service software.

Overload Stop Reset Procedure

Steps to activate BPI mode, use diagnostics program, adjust stop, and close function.

Table of Weights for Overload Stop Testing

Overload Stop Test Weights and Tolerances

Lists test weights and their permissible tolerance (±10%) for various models.

Checking the Overload Stop - Procedure

Overload Stop Check Method

Instructions to open, connect power, add weight (6500g + test weight), adjust stop screw, and verify stability.

Zero-point Offset Value Adjustment - Necessity

Reasons for Zero-point Offset Adjustment

Explains why zero-point offset adjustment is needed (e.g., after PCB replacement, span adjustment issues).

Zero-point Offset Adjustment Procedure

Procedure involving opening the balance, connecting a voltmeter to IC15, and testing preload voltage.

Table of Adjustment Resistors for Zero-point Offset

Voltage to Resistance Value Mapping

Table mapping zero-point offset voltage ranges to R29 resistance values (ohms).

Repeatability (Standard Deviation) - Check Procedure

Checking Repeatability Method

Procedure to check repeatability using test weights and calculating S = (Max - Min) / 3.

Off-center Error - Checking and Adjustment

Checking the Off-center Error

Steps to check off-center error by placing test weight in different positions (1-5) and zeroing.

Adjusting the Off-center Error

Procedure for adjusting off-center error by filing thin parts or using adjustment screws.

Span Adjustment - Manual Procedure

Methods for Span Adjustment

Two methods described: using service software or manual calibration routine.

Manual Span Adjustment Steps

Steps for manual span adjustment: select menu, zero balance, press TARE, center weight.

Adjusting Linearity - Software Method

Checking Linearity Procedure

Linearity check according to WKD-038, in 4-g steps, comparing displayed values to tolerances.

Adjusting Linearity with Service Software

Procedure using service software: activate BPI, connect PC, run linearity program, test span.

Repeatability (Standard Deviation) - Double Lever Systems

Checking Repeatability for Double Lever Systems

Procedure for checking repeatability using test weights, similar to strain gauge systems.

Checking the Off-Center Error - Specific Models

Off-center Error Data and Placement for Triangular Pans

Refers to "Adjustment Datasheet" and details placing test weights on triangular pans.

Off-center Error Data and Placement for Square Pans

Details placing test weights on square pans and adjusting balance if error is too large.

Adjusting the Off-Center Error - Double Lever System

Double Lever System Adjustment Procedure

Steps for adjusting off-center loading error in double-lever systems using a 3-point measurement.

3-point Measurement for Off-center Error Adjustment

Performing the 3-point Measurement

Procedure to place test weight in positions A, B, C and record readings.

Adjusting Deviations Using Adjustment Screws

How to adjust screws inwards (negative) or outwards (positive) based on greatest deviation.

Procedure for Adjusting Off-Center Error - Filing Method

Filing Procedure for Thin Sites on Upper Guide

Describes careful filing at thin places on the upper guide for models TE, GD, TE3102S.

Position of Systems for Off-center Error Adjustment

Opening and Closing the Balance/Scale - Procedures

Replacing the PCB - Guidelines and Procedure

PCB Replacement vs. Component Repair Recommendation

Recommends replacing the entire subassembly rather than attempting component-level repairs.

Pre-Replacement Data Backup Procedure

Suggests reading out and storing the balance/scale's data record before replacing the main PCB.

Main PCB Replacement Steps

Steps to open, disconnect cables, remove screws, old PCB, transfer resistor, install new PCB, and reprogram.

Replacing the Data Output Port - Procedure and Testing

Service Specification Data - Part 1

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