User Manual for PCE-ISM 10ILEQ Impulse Integrating Sound Level Meter

Quick guide from the manual

The PCE-ISM 10ILEQ is an impulse integrating sound level meter designed for measuring exponential time-weighted sound levels, integrated average sound levels, and sound exposure. It supports data storage for up to 800 groups of measurements and features USB and Bluetooth connectivity for data analysis and printing.

Device structure and controls

The device consists of a main unit with a detachable microphone and preamplifier. The front panel contains the LCD screen and control buttons, while the right side houses the sensitivity potentiometer, data cable interface, AC output port, and power input.

• WEIGHTING: Selects A, C, or Lin frequency weighting.
• UP/HOLD: Holds current measurement or increases values.
• FAST/SLOW: Selects time weighting (F, S, I).
• RESET: Resets system and data area.
• OUTPUT: Selects display, printer, or computer output.
• RUN/PAUSE: Controls measurement start/pause and confirms selections.
• MODE: Selects measurement mode (Leq, 1/1 filter, 1/3 filter).
• DOWN/BL: Toggles backlight and decreases values.
• RANGE: Cycles through measurement ranges.
• SET: Accesses parameter settings.

Preparation before use

Before using the instrument for the first time, perform an initialization of the data area. Check the battery status; if the 'batt' symbol appears on the LCD, replace the batteries. Ensure the microphone and preamplifier are securely installed in the head of the unit.

Parameter settings

The device allows configuration of Leq working states, real-time clock, and grid numbers.

• Leq Settings: Press SET in normal mode to enter Leq settings. Use keys to cycle through time intervals (e.g., 10s, 1m, 5m, 1h, 24h).
• Real-time Clock: Press SET twice in normal mode. Use UP/DOWN to modify time and LEFT/RIGHT to select fields.
• Grid Number: Press SET three times in normal mode to set the grid number for data organization.

Measurement procedures

The meter supports various measurement types:

• A, C, and Lin Sound Levels: Turn on the meter and use the WEIGHTING key to select the desired frequency weighting.
• Range Selection: Use the RANGE key to switch between low, medium, and high ranges. If 'OVER' flashes, switch to a higher range; if 'LOW' appears, switch to a lower range.
• Maximum Sound Level: Press UP/HOLD to enter hold mode; the display will update only when a louder sound is detected.
• Leq Measurement: Press MODE to select Leq measurement, then press RUN/PAUSE to start.

Data output

Data can be output to the screen, an optional Bluetooth printer, or a computer.

• Screen Output: Press OUTPUT to view stored data. Use LEFT/RIGHT to change groups and UP/DOWN to view specific parameters like Leq, Lmax, Lmin, and statistical levels.
• Printer Output: Connect the Bluetooth printer. Press OUTPUT to select printer mode and follow prompts to print single or regular data sets.
• Computer Output: Connect via USB. Use the 'TestRS232' software on a Windows PC to collect and analyze data.

Maintenance and calibration

The device is calibrated at the factory. If recalibration is required, use a class 1 sound level calibrator (94dB, 1kHz). Adjust the sensitivity potentiometer on the right side if the reading does not match 93.8dB. Always remove batteries if the device will not be used for an extended period to prevent leakage.

Troubleshooting

If the meter does not turn on, check battery installation and contact. If sound levels are low, inspect the microphone and preamplifier connections. For communication issues, verify the interface connection and restart the software.