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2. INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the
unit and any accessories for damage. If there is any damage then
consult your distributor immediately.
2.2 Description
The Martindale SP79 has the following functions and features:
Complies with BS EN 61672-1 Class 2
Measuring level range from 32 to 130dB
Frequency range from 20Hz to 8kHz
AC and DC outputs for the connection of external instruments
Min-Max function
Auto power off
Low battery indication
Tripod mounting
2.3 Accessories
The SP79 comes with the following accessories:
1 x 9V PP3 battery
Windscreen
Storage case
Instructions
Accessories not included:
SPC70 Sound calibrator
2.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for the battery
installation instructions for the SP79.
3.2 Description of Press Buttons
Turns on/off the SP79
Increases the range
Increments the displayed reading in CAL mode
Decreases the range
Decrements the displayed reading in CAL mode
Sets A or C frequency weighting
A/C
MIN
Selects Min/Max function
MAX
FAST
Sets fast or slow time weighting
SLOw
3.OPERATION
3.1 SP79 Elements
1
Windscreen
2
Liquid crystal display
3
Power button
4
Range increment button
5
Range decrement button
6
Frequency weighting button
7
Min/Max button
8
Time weighting button
9
Microphone
10 AC/DC output socket
11 Tripod mounting thread
12 Battery cover
3
4
3.3 Description of LCD Symbols
FAST
SLOW
UNDER
MIN
MAX
OVER
CAL 94dB
dBC, dBA
3.4 Battery Capacity and Low Battery Indication
If the
symbol is displayed, the battery needs replacing as
measurement accuracy can no longer be guaranteed (see section
4.1 Battery Replacement).
5
6
Auto power off is active
Fast time weighting is selected
Slow time weighting is selected
Indicates measurement is under range
Minimum recorded reading is displayed
Maximum recorded reading is displayed
Indicates measurement is over range
Cal mode is activated
Indicates battery capacity
Units of measurement being displayed
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