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Confidential Page 1 Alarm Limit Sets
报警极限的设置报警极限的设置报警极限的设置报警极限的设置
摘要
报警极限的设置(Alarm Limit Sets)是与分析参数设置(Analysis Parameter Sets)紧
密相关的数据库操作内容。本文将分别介绍 RBMWare 所采用的报警类型、报警水平等内
容,以及报警极限(AL)设置的步骤。最后还将对报警极限标准做一些讨论。
介绍
七种 RBMWare 报警类型:
第一种(Dual Upper Level)是振动分析最常用的报警类型。测量信号幅值的增加表
征设备振动状态劣化程度的加剧。
• Dual Upper Level
• Dual Lower Level
Confidential Page 2 Alarm Limit Sets
• In-Window
• Out-of-Window
以上四种都是绝对数值(Absolute Value)报警类型,而以下三种是差值数据报警类
型。
• Dual Upper Delta
• Dual Lower Delta
• Dual Window Delta
报警水平:
• Upper / Lower Limit of Valid Sensor Reading – 传感器测量上、下限
• Fault Level – 故障
Confidential Page 3 Alarm Limit Sets
• Alert Level – 报警
• Warning Level – 警告,通过对基准值(Baseline Value)确定比例(Baseline
Ratio)来建立。
• Weak Side Limit (Level)– 读数低、高
报警代码:
用于 RBMware 输出的各种统计、报告。
Alarm
Code
Alarm Limit
A
The projected measured value will exceed the absolute fault level within three
measurement intervals.
Br Early warning alarm produced by the Baseline Ratio.
Bs Early warning alarm produced by the Maximum Deviations.
C Alert Level alarm.
D Fault Level alarm.
V
A measured parameter is above the maximum or below the minimum sensor validity
alarm.
W A measured parameter is within the range established by the In-Window alarm.
Lo A measured parameter is below the weak side value with a dual upper alarm type.
Hi A measured parameter is above the weak side value with a dual lower alarm type.
AL 设置的掌握水平在一定程度上取决于实施状态检修的进展以及 RBM 工程师的分
析能力。重视报警功能(特别是拥有 Autostat 时)对于设备劣化趋势的分析非常重要,不
断优化 AL 设置意味着对设备状态判断水平的持续提高。
对于 RBMWare 数据库,AL 设置的来源主要有以下五个方面:
• 使用 RBMWizard 建立数据库时 AL 设置会自动生成。
• 从主数据库中建立设备,其 AL 设置大多源自主数据库中的主设备。
• 使用 Database Utility 建立数据库时 AL 设置也会随“拖-拽”而来。
• 使用 Database Setup 建立数据库时从各种缺省 AL 设置选择生成。
• 可以自行设置。
Confidential Page 4 Alarm Limit Sets
AL 设置的步骤
AL 设置的操作可以在 Database Setup 中通过选中 Alarm Limit Set Information 开始。
Confidential Page 5 Alarm Limit Sets
接下来,可以选择编辑、增加或删除 AL 设置。
下面是一个自行设置报警极限的例子,可以说明 AL 设置需要注意的一些问题。
点击 Add Set 按钮,弹出 Message 窗口。
输入新建 AL Set 的序号。点击 OK 按钮,弹出 Alarm Limit Set 窗口。此时可以在 Set
Description 处输入相应的内容。
对于每一个测点,其报警极限的设置都必须结合相应的分析参数设置内容:点击窗口
右侧的 View AP Set 按钮,并利用弹出窗口右侧的 Next Set 及 Prev Set 按钮找到 Set 10。
Confidential Page 6 Alarm Limit Sets
点击 More Info 按钮,可以得到如下内容。
Confidential Page 7 Alarm Limit Sets
点击 OK 按钮回到 Alarm Limit Set 窗口。可以看到窗口第一列出现了 AP SET No. 010
的 9 项参数。针对这些参数确定参数单位(UNITS)、报警类型(ALARM TYPE)、故障
值(FAULT)、报警值(ALERT)等是 AL 设置的主要内容(PARAMETER 10-12 无需设
置,所有数值栏中设置 0.0)。
由于是振动测点,此例中所有报警类型都采用 DU-A(Dual Upper Level)。
WIKE SIDE(Lo/Hi)一般不用设置。
Maximum Deviations(Bs)或 BASELINE RATIO(Br)用于确定警告水平(Warning
Level),建议在取得一年的数据积累(不少于 10 次数采)之后再做相应的设置。
以下就各参数的 AL 设置做一些说明。
### OVERALL – 通频值(无 AP 设置)
通频值表征了所测量频率范围内的振动总量,其报警极限的设置有一些相关标准可以
参考。此例采用的是下表推荐的标准:
Confidential Page 8 Alarm Limit Sets
RECOMMENDED LIMITS FOR OVERALL UNFILTERED CASING VELOCITY
PEAK VALUE QUALITY
less than .15 IPS Acceptable
.15 to .25 IPS Tollerable
.25 to .4 IPS Tollerable for limited periods of time but increase
the frequency of surveylance to warn of
changes
.4 to .6 Failure probable. Watch closely for changes and
be prepared to shut down for repairs.
Above .6 Danger of immediate failure
### SUB – 次同步频率
低于转速频率。在此频率范围内(0.2-0.8 Ord)的振动能量反映的可能是皮带或其他
减速装置的问题、轴承保持架问题等等。
参数单位:速度(Velocity);故障值:0.15(Inch/sec);报警值:0.1(Inch/sec)。
### 1xTS – 转速频率
平衡问题、对中问题等可能引起转速频率处振动幅值的增加。
参数单位:速度(Velocity);故障值:0.25(Inch/sec);报警值:0.2(Inch/sec)。
### 2xTS – 2 倍转频
对应可能存在的对中问题、机械松动问题等等。
参数单位:速度(Velocity);故障值:0.25(Inch/sec);报警值:0.2(Inch/sec)。
### 3xTS – 3 倍转频
在此频率处的振动能量反映的可能是轴弯造成的连轴器问题或是严重的对中、松动问
题等等。
参数单位:速度(Velocity);故障值:0.2(Inch/sec);报警值:0.15(Inch/sec)。
###2xLF – 2 倍线频
对于交流感应电机,在此频率处出现振动幅值即显示存在电气问题。
参数单位:速度(Velocity);故障值:0.06(Inch/sec);报警值:0.04(Inch/sec)。
Confidential Page 9 Alarm Limit Sets
### LOW FRQ BRG – 轴承频率
在此频率范围内(4-30 Ord)的非同步振动能量一般反映的是轴承问题。
参数单位:速度(Velocity);故障值:0.1(Inch/sec);报警值:0.08(Inch/sec)。
### ROTOR & STATOR – 转子与定子
电机转子条频率或定子槽频率可能落在在此频率范围内(35-50 Ord)。此分析参数及
报警参数的设置更依赖于对电机结构的了解和对趋势数据的积累。
参数单位:加速度(Acceleration);故障值:0.3(g);报警值:0.2(g)。
### HFD – 高频检测
在此频率范围内(5k – 20k Hz)的振动检测有助于发现非常早期的轴承问题。
参数单位:加速度(Acceleration);故障值:6.0(g);报警值:4.0(g)。
### CREST FACTOR – 翘度因子
时域分析参数,常常与轴承问题有关。
故障值:6.0;报警值:4.0。
报警极限标准
一些可参照的通频值振动标准:
Summary of Overall Vibration Standards
Velocity (in/sec) Peak
Standard Measurement Alert Level Alarm Level
Hydraulic Inst. 14th
Edition
Casing 0.30 * ______
I.S.O. 2372 Casing 0.25 0.60
E.P.R.I. FP 754 Shaft 0.50 0.80
A.P.I. 610
6th Edition
Shaft 0.40 ______
Rathbone Chart Casing 0.30 0.60
* Filtered Reading Valid 2,000 - 20,000 CPM
Confidential Page 10 Alarm Limit Sets
Rathbone Chart:
除了通频值标准,没有公开发布的分频率范围振动标准可供参照。各行业的用户可以
在通频值标准的基础上,适合其机器设备具体情况,建立振动报警极限的标准体系。
以下是某机器制造商经多年积累而制定的一些相关企业标准:
Confidential Page 11 Alarm Limit Sets
电机:
MAXIMUM ALLOWABLE VIBRATION LEVELS FOR ELECTRIC MOTORS
VELOCITY LINE-AMPLITUDE BAND LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
STANDARD
MM/SEC - RMS
(INCH/SEC - PEAK)
PRECISION
MM/SEC RMS
(INCH/SEC - PEAK)
1 [0.3 _0.8] x RPM 0.718 (0.04) 0.36 (0.02)
2 [0.8_1.2] x RPM 1.35 (0.075) 0.36 (0.02)
3 [1.2_3.5] x RPM 0.718 (0.04) 0.18 (0.01)
4 [3.5_8.5] x RPM 0.54 (0.03) 0.18 (0.01)
5 8.5 x RPM_1,000 Hz
( _60,000 CPM)
0.54 (0.03) 0.09 (0.005)
6 [1,000 _ 2,000] Hz
(60,000 _ 120,000) CPM)
0.54 (0.03) 0.09 (0.005)
ACCELERATION BAND-LIMITED OVERALL AMPLITUDE LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
STANDARD
g’s RMS (g's PEAK)
PRECISION
g’s RMS (g's PEAK)
1 0.3 x RPM _ 5K Hz 0.35 (0.5) 0.176 (0.25)
风机:
MAXIMUM ALLOWABLE VIBRATION LEVELS FOR FANS
VELOCITY LINE-AMPLITUDE BAND LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
VELOCITY
MM/SEC RMS (INCH/SEC - PEAK)
1 [0.3 _0.8] x RPM 0.718 (0.04)
2 [0.8_1.2] x RPM 1.35 (0.075)
3 [1.2_3.5] x RPM 0.718 (0.04)
4 3.5 x RPM _ Fmax = 2,000 Hz
( _120,000 CPM)
0.54 (0.03)
BAND-LIMITED OVERALL AMPLITUDE LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
ACCELERATION
g’s RMS (g's PEAK)
1 0.3 x RPM _ Fmax = 5,000 Hz
( _300,000 CPM)
0.35 (0.5)
泵类:
Confidential Page 12 Alarm Limit Sets
MAXIMUM ALLOWABLE VIBRATION LEVELS FOR POSITIVE
DISPLACEMENT AND CENTRIFUGAL PUMPS
VELOCITY LINE-AMPLITUDE BAND LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
VELOCITY
MM/SEC RMS (INCH/SEC - PEAK)
1 [0.3 _0.8] x RPM 0.718 (0.04)
2 [0.8_1.2] x RPM 1.35 (0.075)
3 [1.2_3.5] x RPM 0.718 (0.04)
4 3.5 x RPM _ Fmax = 2,000 Hz
( _120,000 CPM)
0.54 (0.03)
BAND-LIMITED OVERALL AMPLITUDE LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
ACCELERATION
g’s RMS (g's PEAK)
1 0.3 x RPM _ 5K Hz
( _300K CPM)
POSITIVE DISPLACEMENT 1.06 (1.5)
NON-POSITIVE 0.707 (1.0)
DISPLACEMENT
PUMPING FREQ.
BAND (PF)
FREQUENCY RANGE
Hz (CPM)
VELOCITY
MM/SEC RMS (INCH/SEC - PEAK)
BAND 5 5 Lines of resolution
centered on PF.
PISTON 1.35 (0.075)
VANE 0.89 (0.05)
齿齿齿:
MAXIMUM ALLOWABLE VIBRATION LEVELS FOR
GEARBOXES WITH _ TWO (2) GEAR SETS
VELOCITY LINE-AMPLITUDE BAND LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
VELOCITY
MM/SEC RMS (INCH/SEC - PEAK)
1 [0.3 _0.8] x RPM 0.718 (0.04)
2 [0.8_1.2] x RPM 1.35 (0.075)
3 [1.2_3.5] x RPM 0.718 (0.04)
4 [3.5_8.5] x RPM 0.54 (0.03)
5 8.5 x RPM _ 1,000 Hz
( _60,000 CPM)
0.54 (0.03)
6 [1,000 _ 2,000] Hz
(60,000 _ 120,000) CPM)
0.54 (0.03)
BAND-LIMITED OVERALL AMPLITUDE LIMITS
BAND FREQUENCY RANGE
Hz (CPM)
ACCELERATION
g’s RMS (g's PEAK)
1 0.3 x RPM _ 3.5 x GMF
or 10K Hz (Which ever is Greater)
0.707 (1.0)

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Alarm limit sets

  • 1. Confidential Page 1 Alarm Limit Sets 报警极限的设置报警极限的设置报警极限的设置报警极限的设置 摘要 报警极限的设置(Alarm Limit Sets)是与分析参数设置(Analysis Parameter Sets)紧 密相关的数据库操作内容。本文将分别介绍 RBMWare 所采用的报警类型、报警水平等内 容,以及报警极限(AL)设置的步骤。最后还将对报警极限标准做一些讨论。 介绍 七种 RBMWare 报警类型: 第一种(Dual Upper Level)是振动分析最常用的报警类型。测量信号幅值的增加表 征设备振动状态劣化程度的加剧。 • Dual Upper Level • Dual Lower Level
  • 2. Confidential Page 2 Alarm Limit Sets • In-Window • Out-of-Window 以上四种都是绝对数值(Absolute Value)报警类型,而以下三种是差值数据报警类 型。 • Dual Upper Delta • Dual Lower Delta • Dual Window Delta 报警水平: • Upper / Lower Limit of Valid Sensor Reading – 传感器测量上、下限 • Fault Level – 故障
  • 3. Confidential Page 3 Alarm Limit Sets • Alert Level – 报警 • Warning Level – 警告,通过对基准值(Baseline Value)确定比例(Baseline Ratio)来建立。 • Weak Side Limit (Level)– 读数低、高 报警代码: 用于 RBMware 输出的各种统计、报告。 Alarm Code Alarm Limit A The projected measured value will exceed the absolute fault level within three measurement intervals. Br Early warning alarm produced by the Baseline Ratio. Bs Early warning alarm produced by the Maximum Deviations. C Alert Level alarm. D Fault Level alarm. V A measured parameter is above the maximum or below the minimum sensor validity alarm. W A measured parameter is within the range established by the In-Window alarm. Lo A measured parameter is below the weak side value with a dual upper alarm type. Hi A measured parameter is above the weak side value with a dual lower alarm type. AL 设置的掌握水平在一定程度上取决于实施状态检修的进展以及 RBM 工程师的分 析能力。重视报警功能(特别是拥有 Autostat 时)对于设备劣化趋势的分析非常重要,不 断优化 AL 设置意味着对设备状态判断水平的持续提高。 对于 RBMWare 数据库,AL 设置的来源主要有以下五个方面: • 使用 RBMWizard 建立数据库时 AL 设置会自动生成。 • 从主数据库中建立设备,其 AL 设置大多源自主数据库中的主设备。 • 使用 Database Utility 建立数据库时 AL 设置也会随“拖-拽”而来。 • 使用 Database Setup 建立数据库时从各种缺省 AL 设置选择生成。 • 可以自行设置。
  • 4. Confidential Page 4 Alarm Limit Sets AL 设置的步骤 AL 设置的操作可以在 Database Setup 中通过选中 Alarm Limit Set Information 开始。
  • 5. Confidential Page 5 Alarm Limit Sets 接下来,可以选择编辑、增加或删除 AL 设置。 下面是一个自行设置报警极限的例子,可以说明 AL 设置需要注意的一些问题。 点击 Add Set 按钮,弹出 Message 窗口。 输入新建 AL Set 的序号。点击 OK 按钮,弹出 Alarm Limit Set 窗口。此时可以在 Set Description 处输入相应的内容。 对于每一个测点,其报警极限的设置都必须结合相应的分析参数设置内容:点击窗口 右侧的 View AP Set 按钮,并利用弹出窗口右侧的 Next Set 及 Prev Set 按钮找到 Set 10。
  • 6. Confidential Page 6 Alarm Limit Sets 点击 More Info 按钮,可以得到如下内容。
  • 7. Confidential Page 7 Alarm Limit Sets 点击 OK 按钮回到 Alarm Limit Set 窗口。可以看到窗口第一列出现了 AP SET No. 010 的 9 项参数。针对这些参数确定参数单位(UNITS)、报警类型(ALARM TYPE)、故障 值(FAULT)、报警值(ALERT)等是 AL 设置的主要内容(PARAMETER 10-12 无需设 置,所有数值栏中设置 0.0)。 由于是振动测点,此例中所有报警类型都采用 DU-A(Dual Upper Level)。 WIKE SIDE(Lo/Hi)一般不用设置。 Maximum Deviations(Bs)或 BASELINE RATIO(Br)用于确定警告水平(Warning Level),建议在取得一年的数据积累(不少于 10 次数采)之后再做相应的设置。 以下就各参数的 AL 设置做一些说明。 ### OVERALL – 通频值(无 AP 设置) 通频值表征了所测量频率范围内的振动总量,其报警极限的设置有一些相关标准可以 参考。此例采用的是下表推荐的标准:
  • 8. Confidential Page 8 Alarm Limit Sets RECOMMENDED LIMITS FOR OVERALL UNFILTERED CASING VELOCITY PEAK VALUE QUALITY less than .15 IPS Acceptable .15 to .25 IPS Tollerable .25 to .4 IPS Tollerable for limited periods of time but increase the frequency of surveylance to warn of changes .4 to .6 Failure probable. Watch closely for changes and be prepared to shut down for repairs. Above .6 Danger of immediate failure ### SUB – 次同步频率 低于转速频率。在此频率范围内(0.2-0.8 Ord)的振动能量反映的可能是皮带或其他 减速装置的问题、轴承保持架问题等等。 参数单位:速度(Velocity);故障值:0.15(Inch/sec);报警值:0.1(Inch/sec)。 ### 1xTS – 转速频率 平衡问题、对中问题等可能引起转速频率处振动幅值的增加。 参数单位:速度(Velocity);故障值:0.25(Inch/sec);报警值:0.2(Inch/sec)。 ### 2xTS – 2 倍转频 对应可能存在的对中问题、机械松动问题等等。 参数单位:速度(Velocity);故障值:0.25(Inch/sec);报警值:0.2(Inch/sec)。 ### 3xTS – 3 倍转频 在此频率处的振动能量反映的可能是轴弯造成的连轴器问题或是严重的对中、松动问 题等等。 参数单位:速度(Velocity);故障值:0.2(Inch/sec);报警值:0.15(Inch/sec)。 ###2xLF – 2 倍线频 对于交流感应电机,在此频率处出现振动幅值即显示存在电气问题。 参数单位:速度(Velocity);故障值:0.06(Inch/sec);报警值:0.04(Inch/sec)。
  • 9. Confidential Page 9 Alarm Limit Sets ### LOW FRQ BRG – 轴承频率 在此频率范围内(4-30 Ord)的非同步振动能量一般反映的是轴承问题。 参数单位:速度(Velocity);故障值:0.1(Inch/sec);报警值:0.08(Inch/sec)。 ### ROTOR & STATOR – 转子与定子 电机转子条频率或定子槽频率可能落在在此频率范围内(35-50 Ord)。此分析参数及 报警参数的设置更依赖于对电机结构的了解和对趋势数据的积累。 参数单位:加速度(Acceleration);故障值:0.3(g);报警值:0.2(g)。 ### HFD – 高频检测 在此频率范围内(5k – 20k Hz)的振动检测有助于发现非常早期的轴承问题。 参数单位:加速度(Acceleration);故障值:6.0(g);报警值:4.0(g)。 ### CREST FACTOR – 翘度因子 时域分析参数,常常与轴承问题有关。 故障值:6.0;报警值:4.0。 报警极限标准 一些可参照的通频值振动标准: Summary of Overall Vibration Standards Velocity (in/sec) Peak Standard Measurement Alert Level Alarm Level Hydraulic Inst. 14th Edition Casing 0.30 * ______ I.S.O. 2372 Casing 0.25 0.60 E.P.R.I. FP 754 Shaft 0.50 0.80 A.P.I. 610 6th Edition Shaft 0.40 ______ Rathbone Chart Casing 0.30 0.60 * Filtered Reading Valid 2,000 - 20,000 CPM
  • 10. Confidential Page 10 Alarm Limit Sets Rathbone Chart: 除了通频值标准,没有公开发布的分频率范围振动标准可供参照。各行业的用户可以 在通频值标准的基础上,适合其机器设备具体情况,建立振动报警极限的标准体系。 以下是某机器制造商经多年积累而制定的一些相关企业标准:
  • 11. Confidential Page 11 Alarm Limit Sets 电机: MAXIMUM ALLOWABLE VIBRATION LEVELS FOR ELECTRIC MOTORS VELOCITY LINE-AMPLITUDE BAND LIMITS BAND FREQUENCY RANGE Hz (CPM) STANDARD MM/SEC - RMS (INCH/SEC - PEAK) PRECISION MM/SEC RMS (INCH/SEC - PEAK) 1 [0.3 _0.8] x RPM 0.718 (0.04) 0.36 (0.02) 2 [0.8_1.2] x RPM 1.35 (0.075) 0.36 (0.02) 3 [1.2_3.5] x RPM 0.718 (0.04) 0.18 (0.01) 4 [3.5_8.5] x RPM 0.54 (0.03) 0.18 (0.01) 5 8.5 x RPM_1,000 Hz ( _60,000 CPM) 0.54 (0.03) 0.09 (0.005) 6 [1,000 _ 2,000] Hz (60,000 _ 120,000) CPM) 0.54 (0.03) 0.09 (0.005) ACCELERATION BAND-LIMITED OVERALL AMPLITUDE LIMITS BAND FREQUENCY RANGE Hz (CPM) STANDARD g’s RMS (g's PEAK) PRECISION g’s RMS (g's PEAK) 1 0.3 x RPM _ 5K Hz 0.35 (0.5) 0.176 (0.25) 风机: MAXIMUM ALLOWABLE VIBRATION LEVELS FOR FANS VELOCITY LINE-AMPLITUDE BAND LIMITS BAND FREQUENCY RANGE Hz (CPM) VELOCITY MM/SEC RMS (INCH/SEC - PEAK) 1 [0.3 _0.8] x RPM 0.718 (0.04) 2 [0.8_1.2] x RPM 1.35 (0.075) 3 [1.2_3.5] x RPM 0.718 (0.04) 4 3.5 x RPM _ Fmax = 2,000 Hz ( _120,000 CPM) 0.54 (0.03) BAND-LIMITED OVERALL AMPLITUDE LIMITS BAND FREQUENCY RANGE Hz (CPM) ACCELERATION g’s RMS (g's PEAK) 1 0.3 x RPM _ Fmax = 5,000 Hz ( _300,000 CPM) 0.35 (0.5) 泵类:
  • 12. Confidential Page 12 Alarm Limit Sets MAXIMUM ALLOWABLE VIBRATION LEVELS FOR POSITIVE DISPLACEMENT AND CENTRIFUGAL PUMPS VELOCITY LINE-AMPLITUDE BAND LIMITS BAND FREQUENCY RANGE Hz (CPM) VELOCITY MM/SEC RMS (INCH/SEC - PEAK) 1 [0.3 _0.8] x RPM 0.718 (0.04) 2 [0.8_1.2] x RPM 1.35 (0.075) 3 [1.2_3.5] x RPM 0.718 (0.04) 4 3.5 x RPM _ Fmax = 2,000 Hz ( _120,000 CPM) 0.54 (0.03) BAND-LIMITED OVERALL AMPLITUDE LIMITS BAND FREQUENCY RANGE Hz (CPM) ACCELERATION g’s RMS (g's PEAK) 1 0.3 x RPM _ 5K Hz ( _300K CPM) POSITIVE DISPLACEMENT 1.06 (1.5) NON-POSITIVE 0.707 (1.0) DISPLACEMENT PUMPING FREQ. BAND (PF) FREQUENCY RANGE Hz (CPM) VELOCITY MM/SEC RMS (INCH/SEC - PEAK) BAND 5 5 Lines of resolution centered on PF. PISTON 1.35 (0.075) VANE 0.89 (0.05) 齿齿齿: MAXIMUM ALLOWABLE VIBRATION LEVELS FOR GEARBOXES WITH _ TWO (2) GEAR SETS VELOCITY LINE-AMPLITUDE BAND LIMITS BAND FREQUENCY RANGE Hz (CPM) VELOCITY MM/SEC RMS (INCH/SEC - PEAK) 1 [0.3 _0.8] x RPM 0.718 (0.04) 2 [0.8_1.2] x RPM 1.35 (0.075) 3 [1.2_3.5] x RPM 0.718 (0.04) 4 [3.5_8.5] x RPM 0.54 (0.03) 5 8.5 x RPM _ 1,000 Hz ( _60,000 CPM) 0.54 (0.03) 6 [1,000 _ 2,000] Hz (60,000 _ 120,000) CPM) 0.54 (0.03) BAND-LIMITED OVERALL AMPLITUDE LIMITS BAND FREQUENCY RANGE Hz (CPM) ACCELERATION g’s RMS (g's PEAK) 1 0.3 x RPM _ 3.5 x GMF or 10K Hz (Which ever is Greater) 0.707 (1.0)