PCE Instruments PCE-SLT User manual

© PCE Instruments
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

© PCE Instruments
1
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.

© PCE Instruments
2
2 Specifications
Sound sensor
Measuring range
30 ... 130 dB in three ranges
Resolution
0.1 dB
Measuring accuracy
±1.5 dB
Frequency weighting
A
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

© PCE Instruments
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3 Dimensions

© PCE Instruments
4
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)

© PCE Instruments
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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

© PCE Instruments
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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

© PCE Instruments
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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.

© PCE Instruments
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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.