TESTO 540 Manual

Short manual for the product

1. Protection cap: Park position
2. Light sensor
3. Display
4. Control keys
5. Battery compartment (on rear)

Basic settings
Instrument off > press and hold 2s > select with , confirm with :
Auto off function: OFF, ON

Switching the instrument on
Press .

Switching the display light on (for 10s)
Instrument on > press

Select display size
Instrument on > select with :
lux, ftc

Select display mode
Instrument on > select with :
Current reading > Hold: Readings are held > Max: Maximum values > Min: Minimum values

Switching the instrument off:
Instrument on >press and hold 2s.

Specifications

Functions and use
The testo 540 is an illuminance measuring instrument. It is normally used to measure illuminance, e.g. at workplaces.

Technical data
Measurement data

• Sensor:
  Photo diode
• Parameters:
  Lux (lm/m 2 ), foot candle (lm/ft 2 )
• Measuring ranges:
  0...99999 Lux, 0...93000 ftc
• Resolutions:
  1 Lux (0...19,999 Lux), 10 Lux (rest of range)
  0.1 ftc (0...1,858.0 Lux), 1 ftc (rest of range)
• Accuracies (Nominal temperature 25°C, ±1 Digit):
  ± 3% to reference (Class B, DIN 5032 part 7)
• Measuring rate:
  0.5 s

Further instrument data

• Protection class: IP40
• Ambient conditions:
  0...50°C, 32...122°F
• Storage/transport conditions:
  -40...70°C, -40...158°F
• Voltage supply:
  2x 1.5 V type AAA
• Battery life:
  200 h (without display light)
• Dimensions:
  133x46x25mm / 5.2x1.8x1.0 in (inc. protection cap)
• Weight: 95 g / 3.4 oz (inc. batteries and protection cap)

Directives, standards and tests

• EC Directive: 2004/108/EEC

Warranty

• Duration: 2 years

Product description

At a glance

1. Protection cap: Park position
2. Light sensor
3. Display
4. Control keys
5. Battery compartment (on rear)

First steps

Inserting batteries

1. To open the battery compartment, push the battery cover down.
2. Insert batteries (2x 1.5 V type AAA). Observe the polarity!
3. To close the battery compartment, push the battery cover back on.

Basic settings in configuration mode

Adjustable functions

• Auto off function: OFF, ON (instrument switches off automatically if no key is pressed for 10 minutes)

1. When switching the instrument on, press and hold until and appear on the display (configuration mode).
   • The adjustable function is displayed. The current setting flashes.
2. Press several times until the desired setting flashes.
3. Press to confirm the input.
   • The instrument changes to measuring mode.

Using the product

To guarantee correct readings: Hold the instrument horizontally so that the light sensor is directed upwards.

Switching the instrument on

• Press .
  • Measuring mode is opened.

Switching the display light on

The instrument is switched on.

• Press .
  • The display light goes out automatically if no key is pressed for 10 seconds.

Changing the parameter unit

• Press until the desired unit appears.

Adjustable units

• lux
• ftc

Changing the display view

Adjustable views

• Current reading
• Hold: Readings are held.
• Max: Maximum values since the instrument was last switched on or last reset.
• Min: Minimum values since the instrument was last switched on or last reset.

• Press several times until the desired view appears.

Resetting Max/Min values

1. Press several times until the desired view appears.
2. Press and hold until appears.
3. Repeat steps 1 and 2 for all values that are to be reset.

Switching the instrument off

• Press and hold until the display goes out.

Maintaining the product

Changing batteries

1. To open the battery compartment, push the battery cover down.
2. Remove used batteries and insert new batteries (2x 1.5 V type AAA). Observe the polarity!
3. To close the battery compartment, push the battery cover back on.

Cleaning the housing

• Clean the housing with a moist cloth (soap suds) if it is dirty.
  Do not use aggressive cleaning agents or solvents!

Questions and answers

Question	Possible causes/solutions
Hi	Readings outside the measuring range (too high: Keep to the permitted measuring range.
	Residual capacity <10 min: Change batteries.

If we could not answer your question, please contact your dealer or Testo Customer Service. Contact details can be found on the guarantee card or on the Internet at: www.testo.com

Safety

About this document

• Pay particular attention to information emphasised by the following symbols:

Important.

Avoid personal injury/damage to equipment

• Only operate the measuring instrument properly, for its intended purpose and within the parameters specified in the technical data. Do not use force.
• Never store the product together with solvents, acids or other aggressive substances.
• Only carry out the maintenance and repair work that is described in the documentation. Follow the prescribed steps when doing so. Use only OEM spare parts from Testo.

PEWS
Messtechnik GmbH
Weidenweg 21
58239 Schwerte
Tel.: 02304-96109-0
Fax.: 02304-96109-88
E-Mail: info@pewa.de
Homepage: www.pewa.de

Documents / Resources

References

• Professionele meetapparatuur + meetsystemen van de wereldmarktleider |
• PEWA Messtechnik, Stromversorgungen und Werkzeuge seit 40Jahren

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