Eclipse Eclipse MT-4618 Manual

Tes
t Equipment Depot - 800.517.8
99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
431
MT-4618
Sound Level Meter
User’s Manual
st
1
Edition, 2015
Preface
Please read the operating manual carefully before using
the product.
The Sound Level Meter is an instrument used to
measure the ambient sound level, such as sound level
around factories, workshops, schools, residential, offices,
road, audio etc. It also can be appropriate for noise
engineering, product quality control, health prevention
and treatment, etc.
Safety instructions
Please use according to each specification of sound level
meter.
Operating environment:
Elevation 2000 m
Relative humidity (RH) ≦80%RH
Operating temperature 0 - 40°C
Storage and maintenance:
Do not use alcohol or other
solvents to clean the meter. If it is not to be used for a
long time, remove batteries and keep the meter in a dry
and clean environment.
Safety symbols:
Dual protection is used for the meter.
Comply with CE safety standard.
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LCD display introduction
Display symbols FAST High
Description Display
symbols OVER Over flow
Description
speed SLOW Low speed A A weighting mode HOLD Keep C C weighting mode UNDER Below dB Decibel MAX Maximum SONE Sound unit (sone) MIN Minimum Battery power
Functional characteristics description
This sound level meter complies with IEC651 Type 2
and ANSI S1.4 Type 2.
Includes the measuring scope from 30 to 130 dB and
automatic shifting function
A and C weighting network selection
High speed (FAST)/Low speed (SLOW) response rate
selection
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Maximum (MAX) locking function
Digital display, good anti-interference performance,
power saving
Includes the backlight feature, it is appropriate for
gathering the sound data at night. To save power,
backlight auto power off function is provided.
Composite material injection molding process is
adopted for casing with anti-drop structure design. It is
not only extremely wear-resistant, but also elegant.
Includes power saving and high-reliability circuit design,
well-designed high-efficiency power supply circuit makes
the batteries more durable.
V. Specifications
Sound pressure accuracy: ± 1.5 dB (sound pressure
standard, 94 dB @ 1KHz).
Sound pressure accuracy: ±5 dB (sound pressure
standard, 94 dB @ 8KHz).
Sound pressure frequency response: 30Hz - 8KHz.
Dynamic range of sound pressure: 50 dB (for each
measurement gear level).
Sound pressure measurement scope: 30-130 dBA,
30-130 dBC.
Sound pressure frequency weighting characteristics: A
and C characteristics.
Dynamic characteristic of sound pressure: FAST
3
125ms, SLOW 1sec
Microphone: polarized capacitive microphone.
Digital display: 4-digit, resolution: 0.1 dB, sampling rate:
2 times/sec.
Analog bar display: Each analog bar represents 1 dB,
sampling rate is 20 times/sec.
Measurement gear level: 30-80 dB, 40-90 dB, 50-100
dB, 60—110 dB, 70—120 dB, 80-130 dB, 6 gear levels in
total.
Automatic shifting gear level: microcomputer will
automatically select the best gear level in the range from
30 to 130 dB.
Below or above limit prompt: indicated with “UNDER”
or “OVER” display.
Power supply: AAA x 4 batteries of 1.5V each
Operating temperature: 0 ~+ 40 °C
Operating temperature: 10 ~80RH
Storage temperature: - 10 ~+ 60 °C
Storage humidity: 10 ~70 RH
Outside measurement: 193 (L) × 60(W) × 29 (H) mm
Accessories: Instruction manual, cotton ball
Preparations before use
1. Use a phillips head to open the battery cover on the
back of the meter, and install AAA x 4 alkaline batteries
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of 1.5V each to the battery holder.
2. Return the battery cover and use a phillips head to
tighten screw.
3. When the battery is aging, “
” symbol will appear
on the LCD display, indicating that batteries don’t have
enough power to use, and should be replaced with new
ones.
Basic usage methods
1. Press the power switch, the default measurement is
auto range microprocessor of LCD display is 30~130 dB.
And the measured onsite sound level will display within
this range. If one of the “UNDER” or “OVER” icons
displays on the LCD, it means that onsite sound is either
lower or higher than the limit range. At this time, the
measurement value is not accurate, you should click Up
and Down key to set the measurement gear level of the
instrument to get accurate measurement value.
2. Setting measurement gear level
:
Press the Level or keys to select appropriate gear
level to measure the current sound level, when the
“UNDER” character appears, it means that the gear level
of the instrument is too high. You should press Level to
set a lower gear level until the “UNDER” character
disappears. When the “OVER” character appears, it
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means that the gear level of the instrument is too low.
You should press Level to set a lower gear level until
the “OVER” character disappears.
3. Selecting the weighting mode
:
To measure the sound level within the human audible
range, select A weighting mode (simulate the hearing
characteristics of human ears) mode, press the A/C key,
click to select A, click again C. To measure the actual
sound level, select C weighting mode.
4. To read real-time sound level, select FAST (high
speed). To obtain the average sound level, select SLOW
(low speed). Press FAST/SLOW key to select FAST or
SLOW.
5. To obtain the maximum sound level, press “MAX”
function key and you can read the maximum sound level
reading value, press MAX key again to return to the
normal measurement mode.
6. To light up the backlight of LCD when measuring at
night, press
key.
Notes
1. Do not use the meter in hot, humid environment.
2. If the meter is not to be used for a long time, remove
the batteries to avoid electrolyte leakage damaging the
instrument.
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3. Auto range (30-130 dB) is not suitable for measuring
transient impact noise.
4. When you measure sound level outside, theanti-wind
ball should be installed on the microphone head to avoid
blowing directly into the microphone and generating
airflow noise.
5. If “
”symbol displays on the LCD, it means that the
battery voltage is too low. You should immediately
replace batteries. It is recommended that you use
alkaline batteries.
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MT-4618數位噪音計 使用說明書 安全聲明
小心或注意
小心注意標誌表示會對儀錶或設備造成損壞的
狀況和操作。
它要求在執行此操作時必須小心,如果不正確執行此
操作或不遵循此操作步驟,則可能導致儀錶或設備損
壞。在不滿足這些條件或沒有完全理解的情況下,請
勿繼續執行小心標誌所指示的任何操作。
警告
警告”標誌表示會對用戶造成危險的狀況和操作。
它要求在執行此操作時必須注意,如果不正確執此行
操作或不遵守此操作步驟,則可能導致人身傷害或傷
亡。在不滿足這些條件或沒有完全理解的情況下,請
勿繼續執行警告標誌所指示的任何操作。
使用本儀錶前,請仔細閱讀說明書並請注意有關安全
警告資訊。 安全須知:
請依照聲
級計各項規格使用。
使用環境條件:
海拔高度 2000
相對濕度 80%RH
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操作溫度 0 - 40
保存及維護:請勿使用酒精等溶劑清潔本表。如果長
期不使用,請將電池取出,並將儀錶放置在乾燥潔淨
的環境。
安全符號:
電錶採用雙重保護。
符合歐洲 CE 安全規範。
概述
聲級計是
用來測量環境聲音等級的儀器:如工廠、車
間、學校、住宅、辦公區、交通道路、音響等各種場
合的聲音等級。也適用於噪音工程,產品品質控制,
健康防治等。

功能特性說明

本聲級計符合國際委員會 IEC651 Type 2 和美
國國家標準 ANSI S1.4 Type2
測量範圍 30~130 分貝和自動換檔功能。
● A 和 C 加權網路選擇。
快速(FAST/ 慢速(SLOW)反應速率選擇。
最大值(MAX)鎖定功能。
數位顯示,抗干擾性能好、省電的優點。
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設計有背光照明,適用於夜間採集聲音資料
使用。為了省電,設計了自動關閉背光功能。
外殼採用複合材料注塑工藝,防摔結構設計,不
僅堅固耐磨,而且美觀大方。
省電型和高可靠性電路設計,高效率電源電路使
電池更加耐用。

液晶顯示介紹

顯示符號 說明 顯示符號 說明
FAST 快速 OVER 溢出
SLOW 慢速 A A加權模式
HOLD 保持 C C加權模式
UNDER 低於 dB 分貝
MAX 最大 SONE 響度單位(宋)
MIN 最小 電量提示
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規格
聲壓準確度:±1.5dB (音壓標準,94dB1KHz)
聲壓準確度:±5dB (音壓標準,94dB8KHz)
聲壓頻率回應:30Hz — 8KHz
聲壓動態範圍:50 dB(每一個測量檔位)。
聲壓測量範圍:30—130dBA35—130dBC
聲壓頻率加權特性:A C 特性。
聲壓動態特性:FAST 125ms, SLOW 1sec
麥克風: 極化電容式麥克風。
顯示:4 位數,解析度 0.1dB,取樣率 2 /秒。
類比條顯示:取樣率 20 /秒。
測量檔位:30—80 分貝、40—90 分貝、50—1
分貝
60—110 分貝、70—120 分貝、80—1
分貝,
6 個檔位。
00
30
自動換檔:微電腦在 30~130 分貝範圍內自動選
擇最佳測量檔位。
低於或超越量限提示:採用“UNDER”
“OVER” 、字元表示。
電源:1.5V AAA 電池 4 個。
工作溫度
0 + 40℃。
工作濕度:10 80RH
儲存溫度:- 10 + 60℃。
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儲存濕度:1070RH
外形尺寸:193 () × 60() × 29 () mm
附件:說明書、海棉套。

使用前準備事項

1. 使用十字螺絲刀打開儀錶背面的電池蓋,裝上 4
AAA 1.5V 電池於電池盒。
2. 蓋回電池蓋並鎖緊螺絲。
3. 當顯示
符號,表示此時電池已欠壓,必須
更換新電池。

基本使用方法

1. 按下電源開關,液晶顯示幕顯示微處理器默認的
自動測量檔位 30~130dB 檔。並顯示測量到的現
場聲音等級。如果顯示幕出現“UNDER”
“OVER”字元,表明現場的聲音低於或高於測量
檔位的量限,此時的測量值是不準確的,您需要
通過按上、下鍵對儀器的測量檔位元進行正確的
設置。才能得到準確的測量值。
2. 設置測量檔位:
按下▼鍵 選擇合適的檔位測量現在的聲
級,當出現“UNDER ”字元時,提示儀器現在的測
量檔位元太高,您需要按動鍵設置較低的檔
位,直到不出現“UNDER” 符號為止。當出現
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“OVER”字元時,提示儀器現在的測量檔位元太
低,您需要按動鍵 設置較高的檔位,直到不
出現“ OVER ”符號為止。
3. 選擇加權模式:
要測量以人為感受的聲級請選擇 A 加權(模擬人
耳的聽覺特性)模式,按 A/C 鍵,按一下選擇 A,
再按一下為 C。要測量實際的聲級請選擇 C 加權
模式。
4. 要讀取即時的聲級請選擇 FAST(快速),如要獲得
當時的平均聲級請選擇 SLOW( 慢速) 。按
FAST/SLOW 鍵選擇 FAST SLOW
5. 要測量聲級的最大值可按 MAX 鍵。即可讀到最
大聲級讀值,再按 MAX 鍵進入正常測量模式。
如要在夜間測量時點亮顯示幕的背光,可按
6.
鍵。

注意事項

1. 請勿置於高溫、潮濕的地方使用。
2. 長時間不使用請取出電池,避免電解液漏出損傷
本儀錶。
3. 自動檔(30—130dB)不適合測量瞬間的衝擊性
噪音。
4. 在室外測量聲級的場合,請在麥克風頭裝上防風
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球,可避免麥克風直接被風吹到而產生氣流雜
音。
5. 如果顯示幕出現“
符號,表明電池電壓過低,
您必須立即更換電池,建議您使用鹼性電池。
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