HER-403 - Sound Level Meter Steren - Free user manual and instructions

Type	Sound Level Meter
Brand	Steren
Model	HER-403
Measuring Range	30 - 130 dB
Accuracy	±1.5 dB
Resolution	0.1 dB
Display	5-digit LCD
Sampling Rate	2 times per second
Frequency Range	31.5 Hz - 8.5 kHz
Frequency Weighting	A and C
Time Weighting	Fast (0.5 s) and Slow (1 s)
Max Hold	Yes
AC Output	0.707 Vrms at full scale, 600 Ω impedance
DC Output	10 mV/dB, 100 Ω impedance
Power Supply	9V battery (square type)
Dimensions (approx.)	200 × 70 × 30 mm
Weight (approx.)	200 g (including battery)
Warranty	1 year
Cleaning	Wipe with a dry, soft cloth
Repairability	Not user-serviceable; contact authorized service center

Frequently Asked Questions - HER-403 Steren

How do I turn on the Steren HER-403 sound level meter?

Press the POWER button to turn the device on. Ensure the battery is installed correctly.

What is the difference between A-weighting and C-weighting?

A-weighting simulates the human ear's response to general noise, while C-weighting is used for analyzing machine and engine noise with a flatter response.

What does the OVER indicator mean?

The OVER indicator appears when the measured sound level exceeds the selected range. Switch to a higher range (e.g., 80-130 dB) to get a valid reading.

How do I measure the maximum sound level?

Press the MAX button to activate MAX hold. The display will show the maximum sound level detected since the function was enabled.

What type of battery does the HER-403 use?

It uses a standard 9V square battery. Replace when the battery icon is low or the device fails to power on.

Can I use the AC output for data logging?

Yes, the AC output provides 0.707 Vrms at full scale with 600 Ω impedance, which can be connected to an external recorder or analyzer.

How do I clean the sound level meter?

Wipe the exterior with a dry, soft cloth. Do not use water or cleaning solvents. Keep the microphone free from dust.

What is the accuracy of the HER-403?

The accuracy is ±1.5 dB under normal conditions.

What does the UNDER indicator mean?

The UNDER indicator appears when the sound level is below the selected range. Switch to a lower range (e.g., 30-80 dB) to get a reading.

Is the HER-403 suitable for industrial noise monitoring?

Yes, with a frequency range of 31.5 Hz to 8.5 kHz and C-weighting, it is suitable for measuring industrial noise from machines and engines.

USER MANUAL HER-403 Steren

IMPORTANTE

1. ECON: Active Coatings Agile Model: HER-00 Mesa - Simon

The following table provides the information in a tabular format:

- Fume, a perched or puret a perched or puret a perched, an exced to be supplied to a Cembrica (see 1.5).
- E. de la vina (see 2.0). A compaunt y c m p l e r t o s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d d u s t o n s i n g a r e d d u s t o n s i n g a r e d d u s t o n s i n g a r e d d u s t o n s i n g a r e d d u s t o n s i n g a r e d d u s t o n s i n g a r e d d u s t o n s i n g a r e d d d u s t o n s i n g a r e d d d u s t o n s i n g a r e d d d u s t o n s i n g a r e d d d u s t o n s i n g a r e d d d u s t o n s i n g a r e d d d u s t o n s i n g a r e d d d u s t o n s i m p l e c t.
- E. quas de la vina (see 3.0). A compaunt y c m p l e r t o s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a r e d u s t o n s i n g a f r m p l e c t.

1. Can you see the following instructions:

2. 2005年1月1日，公司向深圳证券交易所申请发行人民币普通股3,476,000股。

3. commercial property and other changes in the market

4. In some field to be educational program in 2016, the program has been organized at a level of 30% of the total number of participants. The number of participants is 50% of the total number of participants.

1912.10.18(1)

Read carefully this manual to be sure how to use your new product.

• Do not try to open the device, may cause damages and warranty will be void.
• Avoid dropping the unit as this may cause damage.
• Do not put heavy objects on the device or accessories.
• Do not expose the device or accessories to dust, smoke or steam.

PARTS

SCREEN ICONS

BATTERY PLACE AND REPLACEMENT

HOW TO USE

Before to use, remember to place the filter to avoid external noises while measuring.

1. Press POWER to turn on the device.
2. Press▼ or ▲ to select the measurement range.

Weighing A Use to measure general noise

Weighing C Use to analyze the noise level of machines, engines, etc.

The device will respond like the human ear to any sound.

The device will make measures with flat responses, with no increases or cuts of the range.

ress AC to choose the frequency type with which you want to measure.

30 \~ 130 dB 30 \~ 80 dB 50 \~ 100 dB 60 \~ 110 dB 80 \~ 130 dB

adjust the measure time with

FAST Fast measure (each 0.5 seconds)

SLOW Slow measure (each second)

1. Aim the microphone toward the sound source.

2. Watch the measure into the screen. If the UNDER word appears, means that the result is under of the measure selected range; if the OVER word appears, indicate that the measure is over to the range.

If you require the maximum value of a sound, press MAX. In the screen appears the MAX symbol below the measure.

SPECIFICATIONS

Measuring range: 30 - 130 dB

Accuracy: + 1.5 dB

Resolution: 0.1 dB

Display: 5 dígitos

Sample relation: 2 times per second

Frequency range: 31.5 Hz - 8.5 kHz

Auxiliary output: 0.707 Vrms on AC at full range for each level.

600 Ω impedance

10 mV/dB in DC, 100 Ω impedance

Input: 9 V --- (square battery)

STEVEN® Product: Digital sound meter Rikksys part: HSP 402 Hand, Clear

The German product is warranted under normal usage against defects in workmanship and materials to the original purchaser for one year from the date of purchase.

CONDITIONS 1. This warranty card with all the required information, links to purchase ticket, product box or package, and product must be presented when

1. The product is the warranty line, the company will repair three of charge.

2. Eleven sell parts, components, consumables and accessories to customer, as well as warranty service, at any of the addresses mentioned

THIS WARRANTY IS VOID IN THE NEXT CASES

If the product has been damaged by an essential account of Coal, neither being only one for use, in case in the second construction, or missing prior by an authorized

a) The consumer can also claim the warranty service in the purchase establishment.

In if you know the women's card, we can read it if you show the interests or purchases for them.

RETAILER INFORMATION

Address

Priced Road

Serial number

Larg of ordinary

2016/10/31