IET Labs 1565-E Guide de dépannage
REPRODUCTION AND DISTRIBUTION OF THIS TECHNICAL MANUAL
IS AUTHORIZED FOR U.S. GOVERNMENT PURPOSES
We warrant that this product is free from defects in material and workmanship and, when properly used,
will perform in accordance with applicable IET specifi cations. If within one year after original shipment,
it is found not to meet this standard, it will be repaired or, at the option of IET, replaced at no charge when
returned to IET. Changes in this product not approved by IET or application of voltages or currents greater
than those allowed by the specifi cations shall void this warranty. IET shall not be liable for any indirect,
special, or consequential damages, even if notice has been given to the possibility of such damages.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR ANY PARTICULAR PURPOSE.
OBSERVE ALL SAFETY RULES
WHEN WORKING WITH HIGH VOLTAGES OR LINE VOLTAGES.
Dangerous voltages may be present inside this instrument. Do not open the case
Refer servicing to qualifi ed personnel
HIGH VOLTAGES MAY BE PRESENT AT THE TERMINALS OF THIS INSTRUMENT
WHENEVER HAZARDOUS VOLTAGES (> 45 V) ARE USED, TAKE ALL MEASURES TO
AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS.
USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE
CONDUCTORS WHEN USING THIS INSTRUMENT.
Use extreme caution when working with bare conductors or bus bars.
WHEN WORKING WITH HIGH VOLTAGES, POST WARNING SIGNS AND
KEEP UNREQUIRED PERSONNEL SAFELY AWAY.
DO NOT APPLY ANY VOLTAGES OR CURRENTS TO THE TERMINALS OF THIS
INSTRUMENT IN EXCESS OF THE MAXIMUM LIMITS INDICATED ON
THE FRONT PANEL OR THE OPERATING GUIDE LABEL.
2.1 Model Confi guration and Specifi cations ........................................................................3
2.2 General Specifi cations ...................................................................................................4
3.1 Initial inspection and setup ............................................................................................7
3.2 Connection .....................................................................................................................7
3.2.1 General Considerations ........................................................................................7
3.2.2 Electrical Considerations ......................................................................................7
3.2.3 Four-Wire Kelvin Lead Connections ...................................................................7
3.2.4 Thermal emf Considerations ................................................................................7
3.3 Dial Setting ....................................................................................................................8
3.4 Environmental Conditions .............................................................................................8
3.5 Local Operation .............................................................................................................8
3.6 Remote Operation ..........................................................................................................8
8.1 Verifi cation of Performance
8.2 Calibration Interval
1.1 Introduction
The 1565-E is a Type 2, general purpose SLM
with corresponding to ANSI S1.4-1983 Type 2
and IEC61672-1:2013 Class 2
The chief use of the SLM is making noise
measurements in a work place such as: routine
measurements of offi ce building HVAC sys-
tems, machinery, traffi c noise, and other noises
of a reasonably constant character.
1.2 Description
The instrument is housed in a high impact
molded plastic case that is shaped for comfort-
able hand-held operation and tapered at the
microphone end to minimize the effect of case
diffraction.
It consists of the following elements: a mi-
crophone to pickup sound; an amplifi er, to
raise the microphone output to useful levels; a
calibrated attenuator, to adjust the amplifi ca-
tion to a value appropriate to the sound level
being measured; a display, networks, to adjust
the frequency characteristic of the response (A
or C weighting) ; and an output connection, to
accommodate additional measuring equipment.
It covers the sound-level range from 35 to 130
dB in 2 overlapping ranges.
Figure 1 1565-E Sound Level Meter
For convenience to the user, the pertinent
specifi cations are given in an OPERATING
GUIDE, shown typically in Figure 2.1, affi xed
to the case of the instrument.
2.1 Specifi cations
Sound level range: 35 to 130 dB re 20 µN/m2
Sound level accuracy: ±1.5 dB
Frequency range: 31.5 Hz to 8 kHz
Weighting: A and C
Output: 3.5 mm mini-jack
ac Output: >0.65 Vrms behind 600 Ω at full
scale; will drive oscilloscope or low-imped-
ance headphones
dc Output: 10 mV/dB
Display: 3-1/2 digit LCD display, full scale
sound-level range set by Range select switch,
greater than 10 dB portion of scale for sound-
level comparisons on 2 ranges, and low end of
sound-level range set by range select switch.
Power: One 9V (6F22 or equivenent) alkaline
battery supplied, provides 50+ hours of opera-
tion
Environmental:
Temperature: 0 to 50°C operating
-40 to +60°C storage, with batteries removed
Humidity: <95% RH non-condensing
Weight: 0.21 kg (7 oz) net, 1.4 kg (3 lb) ship-
ping
Dimensions: 24 cm H x 6.8 cm W x 2.5 cm D
(9.45” x 2” x 1”)
Accessories supplied: Instruction manual,
windscreen, adjustment screwdriver and carry-
ing case
Additional Specifi cations
Standard: Conforms to ANSI S1.4-1983 Type
2 and IEC61672-1:2013 Class 2
Dynamic range: 55 dB with 2 ranges Lo and
Hi
Ranges: Lo: 35 - 90 dB and Hi: 75 - 130 dB
Time weighting: rms response with fast 125
mS and slow 1 s
Microphone: 1/2” electret condenser micro-
phone
Resolution: 0.1 dB
Calibration: Internal oscillator at 1 kHz and
94 dB
Recommended calibration interval: 12
months
FIGURE 2.1 Typical OPERATING GUIDE Affi xed to Unit
(Please see label affi xed to your unit)
3.1 Initial inspection and setup
This instrument was tested and carefully in-
spected before shipment. It should be in proper
electrical and mechanical order upon receipt.
An OPERATING GUIDE is attached to the
case of the instrument to provide ready refer-
ence to specifi cations.
Precautions:
• Care should be taken to keep the SLM and
microhone clean and dry
• Do not store in areas of high humidity for
extended periods
• Avoid subjecting the SLM to excessive
vibration
• Remove batteries when stored for long
periods of time
3.1.2
Accessories Included
1. 1565-E Sound Level Meter Instruction
Manual
2.) Carry case for SLM and accessories
1565-E-CASE
3.) Windscreen 1565-E-WS
4.) Adjustment screwdriver 1565-0440-01
5.) 9 V battery 6F22
6.) Phone plug for ac/dc output 1565-E-PP
3.1.3 Key Features
1. 1/2” Electret Microphone
2. LCD display
3. POWER OFF & RANGE select switch
4. RESPONSE & HOLD select switch
5. A/C weighting and Calibration switch
6. Calibration adjust screw for 94dB
7. Reset key (resets max hold reading)
8. AC/DC analog output 3.5mm phone jack
9. Battery compartment on rear of meter
Note: The threaded tripod mount screw hole is
on the center rear of the meter (not shown).
Figure 3-1 Key Features
3.1.4
Condensed Operating Instructions
1. Power the meter by moving the RANGE
switch to the LO or HI range position, the me-
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