1. Introduction
This manual provides comprehensive instructions for the safe and effective use of the PCE Instruments PCE-170 A Light Meter. This device is designed for measuring illuminance (lux or foot-candles) in various environments, such as offices, factories, and outdoor settings. It features a wide measurement range, fast response time, and a compact design for ease of use.
Please read this manual thoroughly before operating the device and retain it for future reference.
2. Safety Information
Observe the following safety precautions to prevent injury and avoid damage to the device:
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Avoid strong vibrations or impacts.
- Do not attempt to open or modify the device. Refer all servicing to qualified personnel.
- Keep the light sensor clean and free from obstructions to ensure accurate readings.
- Remove the battery if the device will not be used for an extended period to prevent leakage.
- Dispose of batteries and the device according to local regulations.
3. Product Overview
The PCE-170 A Light Meter consists of a main unit with a display and control buttons, and an integrated light sensor.
Figure 1: Front view of the PCE-170 A Light Meter, showing the display, control buttons, and light sensor at the top.
3.1 Components
- Light Sensor: Located at the top of the device, protected by a white dome. This silicon photodiode measures incident light.
- LCD Display: A 5-digit display showing measurement values, units (lux/fc), and function indicators (e.g., AUTO RANGE, HOLD, MIN, MAX).
- Power Button (On/Off): Turns the device on or off.
- CAL Button: Used for zero adjustment.
- HOLD Button: Freezes the current reading on the display.
- fc/lx Button: Toggles between foot-candle (fc) and lux (lx) measurement units.
- RANGE Button: Manually selects measurement ranges or activates auto-ranging.
- Battery Compartment: Located at the rear, houses the 9V battery.
Figure 2: Close-up view of the LCD display, showing a reading of "534 lx" and "AUTO RANGE 4 000".
Figure 3: Detailed view of the light sensor at the top of the device, with its protective cap removed.
4. Setup
4.1 Battery Installation
- Locate the battery compartment cover on the back of the device.
- Slide the cover open or unscrew it, depending on the model.
- Insert one 9V battery, observing the correct polarity (+/-).
- Replace the battery compartment cover securely.
Figure 4: The PCE-170 A Light Meter shown with its carrying case and the included 9V battery, ready for installation.
4.2 Initial Power-On
Press the Power button to turn on the device. The display will illuminate and show a reading. If the battery symbol appears, replace the battery.
5. Operating Instructions
5.1 Taking a Measurement
- Turn on the device using the Power button.
- Ensure the light sensor is clean and unobstructed.
- Position the light sensor at the location where illuminance is to be measured. Ensure the sensor is facing the light source directly for accurate readings.
- The current illuminance value will be displayed on the LCD.
Figure 5: A user measuring light levels in an office environment with the PCE-170 A Light Meter.
5.2 Changing Measurement Units (fc/lx)
Press the fc/lx button to toggle between foot-candles (fc) and lux (lx) units. The selected unit will be indicated on the display.
5.3 HOLD Function
Press the HOLD button to freeze the current reading on the display. Press it again to release the hold and resume live measurements.
5.4 Zero Adjustment (CAL)
To perform a zero adjustment:
- Place the light sensor in a completely dark environment (e.g., cover it with the protective cap or place it in a dark box).
- Press the CAL button. The display should show "0.00" or a value very close to zero.
- If the display does not show zero, repeat the process.
5.5 Range Selection
The device typically operates in auto-ranging mode. To manually select a range or cycle through available ranges, press the RANGE button. The display will indicate the active range. Press and hold the RANGE button to return to auto-ranging mode.
5.6 Min/Max Function (Power-Up Option)
The PCE-170 A supports Min/Max recording. To activate this feature, refer to the power-up options indicated on the device label (e.g., press and hold a specific button during power-on). This function records the minimum and maximum illuminance values detected during a measurement session.
6. Maintenance
6.1 Cleaning
Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents. Keep the light sensor clean and free of dust or smudges, as this can affect measurement accuracy.
6.2 Storage
When not in use, store the PCE-170 A Light Meter in its carrying case in a cool, dry place, away from direct sunlight and extreme temperatures. Remove the battery if storing for extended periods.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Dead or incorrectly installed battery. | Check battery polarity or replace with a new 9V battery. |
| Display shows "OL" (Overload). | Light intensity exceeds the current measurement range. | Switch to a higher measurement range using the RANGE button, or move to a less intensely lit area. |
| Inaccurate readings. | Dirty sensor, incorrect zero adjustment, or sensor not facing light source correctly. | Clean the sensor, perform zero adjustment in darkness, and ensure the sensor is properly oriented. |
| Display is blank or flickering. | Low battery. | Replace the 9V battery. |
8. Specifications
| Parameter | Value |
|---|---|
| Measurement Ranges | 0.00 ... 40,000 lux / 0.000 ... 4000 fc |
| Resolution | 0.01 lux / 0.001 fc |
| Accuracy | ±3% of measurement value + 5 digits |
| Overload Indicator | "OL" |
| Measurement Rate | Every 2 seconds |
| Operating Temperature | 0 ... 40°C / 32 ... 104°F |
| Light Sensor | Silicon photodiode, corrected cosine angle |
| Display | 5-digit LCD |
| Power Source | 9V battery (included) |
| Dimensions | 33 x 54 x 196 mm / 1.3 x 2.1 x 7.7 in |
| Weight | 180 g / <1 lb (approx. 9.17 ounces) |
8.1 Delivery Scope
The standard delivery package includes:
- 1 x PCE-170 A Lux Meter
- 1 x 9V battery
- 1 x Carrying case
- 1 x User manual (this document)
9. Warranty and Support
PCE Instruments provides a warranty for this product against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or visit the official PCE Instruments website. For technical support, service, or calibration inquiries, please contact PCE Instruments customer service.
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