PCE Instruments PCE-SLT User manual

PCE-SLT Sound Level Meter (Including Transmitter PCE-SLT-TRM)

User Manual

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Last change: 31 January 2024

v1.0

English

 
 © PCE Instruments 
 
 
Contents 
1Safety notes........................................................................................... 1 
2Specifications........................................................................................2 
3Dimensions............................................................................................ 3 
4Description transmitter ........................................................................ 4 
5Display description............................................................................... 5 
6Initial commissioning ........................................................................... 7 
6.1 Connecting the transmitter ............................................................................................... 7 
6.2 Connecting the display..................................................................................................... 7 
7Set measurement ranges ..................................................................... 7 
8Calibration ............................................................................................. 7 
9Alarm setting (control) .........................................................................7 
10 Advanced menu .................................................................................... 8 
10.1 Decimal point shift............................................................................................................ 8 
10.2 4 mA Parameter............................................................................................................... 8 
10.3 20 mA parameter ............................................................................................................. 8 
10.4 Filter function ................................................................................................................... 8 
10.5 Hysteresis for the control message................................................................................... 8 
10.6 Hysteresis for the alarm function...................................................................................... 9 
10.7 Offset............................................................................................................................... 9 
10.8 Gain setting...................................................................................................................... 9 
10.9 Set RS232 unit................................................................................................................10 
11 RS232 ...................................................................................................11 
11.1 RS232 settings................................................................................................................11 
11.2 RS232 protocol ...............................................................................................................12 
12 Reset system....................................................................................... 12 
13 Contact.................................................................................................12 
14 Disposal ...............................................................................................12 
 
 
 

1 Safety notes

Please read this manual carefully and completely before you use thedevice for the first time. The

device may only be used by qualified personnel and repaired by PCE Instruments personnel.

Damage or injuries caused by non-observance of the manual are excluded from our liability and

not covered by our warranty.

•The device must only be used as described inthis instruction manual.If used otherwise,

this can cause dangerous situations for the user and damage to the meter.

•The instrument may only be used if the environmental conditions (temperature, relative

humidity, …) are within the ranges stated in the technical specifications. Do not expose

the device to extreme temperatures, direct sunlight, extreme humidity or moisture.

•Do not expose the device to shocks or strong vibrations.

•The case should only be opened by qualified PCE Instruments personnel.

•Never use the instrument when your hands are wet.

•You must not make any technical changes to the device.

•The appliance should only be cleaned with a damp cloth. Use only pH-neutral cleaner,

no abrasives or solvents.

•The device must only be used with accessories from PCE Instruments or equivalent.

•Before each use, inspect the case for visible damage. If any damage is visible, do not

use the device.

•Do not use the instrument in explosive atmospheres.

•The measurement range as stated in the specifications must not be exceeded under

any circumstances.

•Non-observance of the safety notes can cause damage to the device and injuries to

the user.

We do not assume liability for printing errors or any other mistakes in this manual.

We expressly point to our general guarantee terms which can be found in our general terms of

business.

2 Specifications

Sound sensor

Measuring range

30 ... 130 dB in three ranges

Resolution

0.1 dB

Measuring accuracy

±1.5 dB

Frequency weighting

Power supply

via transmitter

Cable length

1.5 m

Wall bracket

screwable (included in the scope of delivery)

Envioronmental conditions

max. 80 % RH / 0 ... +50 °C / 32 ... 122 °F

Microphone

1/2" precision electret microphone

Standard

IEC 61672 Class II

Transmitter

Housing

ABS plastic

Power supply (depending on model)

90 ... 260 VAC

24 V DC (max. 1,5 A)

Calibration

adjustable via grub screw

Output

4 ... 20 mA

Protection class

IP 50

Environmental conditions

max. 80 % RH / 0 ... +50 °C / 32 ... 122 °F

Digital display

Input signal from transmitter

4 ... 20 mA

Display

-1999 ... 9999 (1 ... 3 decimal places, depending

on measured value / user-selectable)

Programming data (decimal place,

limit value...)

are stored in the device

Control output

relay output: 0.5 A / 240 VAC

Alarm output

relay output: 0.5 A / 240 VAC

Power supply

90 ... 260 ACV / 50 ... 60 Hz

Dimensions / panel cut-out according

to DIN

92 (+ 0.8) mm x 45 (+ 0.5) mm

Weight

approx. 250 g / 0.56 lb

Envioronmental conditions

max. 80 % RH / 0 ... +50 °C / 32 ... 122 °F

Protection class

IP 60

3 Dimensions

4 Description transmitter

5 and 6 Supply voltage

3.1 Calibration potentiometer

7 and 8 Current output

3.2 Power light

1 to 4 Not used

3.3 Sensor connection (female)

3.4 Connection to mounting plate

3.5 Fixing holes for wall mounting

3.6 Sensor connection (male)

3.7 Sensor

3.8 Transmitter cover

3.9 Setting the measured value ranges

3.10 Light (measured value too low)

3.11 Light (measured value too high)

5 Display description

3.1 Display

3.2 Measured value display (indicator)

3.3 Value set display (indicator)

3.4 SET key

3.5 Decrease key

3.6 Increase key

3.7 Control display

3.8 Alarm display

3.9 Terminal strip

3.10 Mounting bracket

3.11 RS232 interface

T1 - T2 Power supply

T3 - T4 Control relay

T5 - T6 Alarm relay

T7 - T8 Power supply 24 VDC

T9 - T14 Not connected

T15 - T16 4 ... 20 mA interface

6 Initial commissioning

6.1 Connecting the transmitter

First mount the connection terminal to a designated DIN rail or screw it to a designated surface.

First connect the mains voltage. To do this, use connection 5 and 6 on the connection terminal.

Ensure that the connection cable is initially voltage-free.

Then connect the transmitter to the connection terminal.

Finally, connect the sensor to the transmitter.

Note: For the 24 V version of the transmitter (PCE-SLT-TRM-24V), ensure that the supply ground

is galvanically isolated from the signal ground.

6.2 Connecting the display

First mount the display using the mounting bracket.

For the power supply, connect the mains cable to the T1 and T2 connections on the display

connection terminal. Ensure that the mains supply cable is initially voltage-free.

Now connect the transmitter to the display. To do this, connect pin 7 to T15 (positive) and pin 8

to T16 (negative).

7 Set measurement ranges

First open the transmitter cover. Then remove the internal rubber seal.

The switches for setting the measurement range are now accessible. Use the table on the inside

of the transmitter cover to set the measurement range. Then cover the switches again with the

rubber seal and close the transmitter cover.

8 Calibration

Open the transmitter cover. Turn the potentiometer labelled "SPAN" to adjust themeasured value.

To make changes to the potentiometer, use a small slotted screwdriver.

9 Alarm setting (control)

The display has two separate alarm relays. A distinction is made between control and alarm. The

difference is that when the alarm switches, the display also flashes, which is not the case with the

control.

To programme the limit values of the two functions, proceed as follows:

First press the "SET" key briefly. “CtLo" appears on the display to set the lower control value. You

can now set this value directly using the arrow keys. Press the "SET" key to confirm this value

and return directly to the menu.

To set other parameters, press the "SET" key continuously until you have reached your

parameter. The menu is organised as follows.

CtLo →lower control value

CtHi →upper control value

ALLo →lower alarm value

ALHi →upper alarm value

Once you have set all the parameters, press the "SET" key again to exit the menu.

10 Advanced menu

To access the extended menu, press the "SET" key for two seconds.

This menu is organised as follows:

dPSt Decimal point shift

4-A4 mA parameter

20-A20 mA parameter

FiLt Filter function

CtHY Hysteresis for the control function

ALHY Hysteresis for the alarm function

oFSt Offset

GAin Gain setting

Unit Set RS232 unit

10.1 Decimal point shift

To move the decimal point, first press the "SET" key for two seconds. “dPSt" appears on the

display. Now press the arrow keys to access this configuration mode and to move the decimal

point. Press the "SET" key to save the setting.

10.2 4 mA Parameter

To change the parameterisation for 4 mA, first press the "SET" key for two seconds. “dPSt"

appears on the display. Press the "SET" key again. "4-A" now appears on the display. Now press

the arrow keys to access this configuration mode and to change the parameterisation for 4 mA.

Press the "SET" key to save the setting.

10.3 20 mA parameter

To change the parameterisation for 20 mA, first press the "SET" key for two seconds. “dPSt"

appears on the display. Now press the "SET" key twice. The display now shows "20-A". Now

press the arrow keys to access this configuration mode and to change the parameterisation for

20 mA. Press the "SET" key to save the setting.

10.4 Filter function

To change the parameterisation for the filter function, first press the "SET" key for two seconds.

“dPSt" appears on the display. Now press the "SET" key three times. “FiLt" now appears on the

display. Now press the arrow keys to access this configuration mode and to change the

parameterisation for the filter function. The higher the value, the more filtering takes place. Press

the "SET" key to save the setting.

10.5 Hysteresis for the control message

To change the parameterisation of the hysteresis for the control message, first press the "SET"

key for two seconds. “dPSt" appears on the display. Now press the "SET" key four times. “CtHY"

now appears on the display. Now press the arrow keys to access this configuration mode and to

change the parameterisation for the hysteresis. Press the "SET" key to save the setting.

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