Model 820 Key Functions
White
Primary function keys, push button directly
Shift
Press
U
key first to access blue keys
Arrow
Change or modify info in fields, use w/other keys
for other functions
Keys Functions
BATT
Percentage power remaining in 9 V battery
CAL
Calibration information and control
Cancel
Return to previous function or cancel present func-
tion (acts as an ESCAPE key to exit out of a menu)
DOSE
Dose and Projected Dose %
ENTER Enter new parameters selected by user
EXCD
History for noise exceeding a programmed level
HIST
Short interval Leq time history
INTV
Statistical Interval History
LDL
Allows user to recalculate TWA, SEL, dose, pro-
jected dose readings with new exchange
LDN
TWA with 10 dB penalty
Leq
Equivalent Level=TWA based on 3dB
Lmax
Maximum SPL for overall measurement
Lmin
Minimum SPL for overall measurement
Ln
SPL exceeded n% of run time, 4 user selectable
Ln’s shown
LOCK
Access to lock system
LOG
Log of all Run/Stop actions which start /stop data
taking process
MEM
Displays available memory & number of stored
records
OFF
Turn 820 off
ON
Turn 820 on (when on acts same as “Cancel”)
PEAK
Highest weighted peak detector output level with
date and time of event
List of reports on scroll, key name for each one
RCL
EEPROM and RAM registers
RESET
Restarts a measurement by erasing values just mea-
sured
R/S
Start and Stop measurements
SEL
Sound Exposure Level is the total energy for 1 s
SETUP
Access to parameters by number or key
SLM
Current Sound Pressure Level
STR
Storage registers for parameters and calibration
(0-9)
T.A.
Time Weighted Average and German Takt Maximal
levels
TIME
Date and time last reset or measurement start
TIMER Permits unattended measurements
UWPK
Highest unweighted peak detector output level with
date/time of event
Alpha-Numeric Keyboard Layout
Alpha-numeric keys are available to enter 3 lines for the
Company Name and 1 line for Measurement Title. To enter
company and measurement information:
• Press
Rm02e
• Choose name for reports and enter using alpha-numeric
keypad as shown at left. Note that multiple shift presses are
necessary to enter certain characters
• Press
m
and choose letters for name
• After entering name, press
e d
to move to next line
• Press
m
and enter letter for line 2
• Press
e d
to move to line 3
• Press
m
, enter letters for line 3,
• Press
e d
to move to line 4, and enter the
Measurement Title
• Press
e
(name appears on main screen)
• Press c to return to main screen
Setup Key Functions by Number
• All parameters are accessed through
R
key
• Each parameter is assigned a parameter number
• Press
R
. Press
m
• Enter item # of parameter (820 Manual chap 8) and press
e
. Time, Day, Week, parameters 6-8
• Scroll through parameters using
ud
• Top of parameters list: Press
U
u
• Bottom of Parameter list:
U
d
Setup Key Functions by Key
Major parameters (listed on keypad) are accessed by pressing
R and desired parameter key or by pressing
R
,
U
,
and desired parameter key. For example, to access the interval
parameters, press
RM
.
Lock Parameters
• Access Lock Parameter:
R
U
L P
• Personal password:
m
, enter 1-8 characters,
e
• Lock Options: parameters 28-34
• Unlock system:
U
Lm
enter password,
e
SLM Key Options
Current SLM, Min, Max, Pk, UW, Leq, SEL; Alm Time,
Temp, and serial communications are available by pressing
Cdu
Setup Storage Registers
• Press
U
sd
[repeated
d
cycles through setup stor-
age registers 0 to 9] press
e
to store settings
• Press
U
Rd
[0 to 9]
e
to recall settings
↑
↓
←
→
+
7
8
9
-
4
5
6
t
f
i
h
S
1
2
3
l
e
c
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a
C
0
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r
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E
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*
↵
↵
A
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p
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t
n
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$
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>
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E
Alpha-Numeric Keyboard Layout
Standard Keyboard.
Press
U
once
to
access these charac-
ters.
Press
U
twice
to
access these charac-
ters.
Press
U
three
times to access these
characters.
Model 820 Key Functions
White
Primary function keys, push button directly
Shift
Press
U
key first to access blue keys
Arrow
Change or modify info in fields, use w/other keys
for other functions
Keys Functions
BATT
Percentage power remaining in 9 V battery
CAL
Calibration information and control
Cancel
Return to previous function or cancel present func-
tion (acts as an ESCAPE key to exit out of a menu)
DOSE
Dose and Projected Dose %
ENTER Enter new parameters selected by user
EXCD
History for noise exceeding a programmed level
HIST
Short interval Leq time history
INTV
Statistical Interval History
LDL
Allows user to recalculate TWA, SEL, dose, pro-
jected dose readings with new exchange
LDN
TWA with 10 dB penalty
Leq
Equivalent Level=TWA based on 3dB
Lmax
Maximum SPL for overall measurement
Lmin
Minimum SPL for overall measurement
Ln
SPL exceeded n% of run time, 4 user selectable
Ln’s shown
LOCK
Access to lock system
LOG
Log of all Run/Stop actions which start /stop data
taking process
MEM
Displays available memory & number of stored
records
OFF
Turn 820 off
ON
Turn 820 on (when on acts same as “Cancel”)
PEAK
Highest weighted peak detector output level with
date and time of event
List of reports on scroll, key name for each one
RCL
EEPROM and RAM registers
RESET
Restarts a measurement by erasing values just mea-
sured
R/S
Start and Stop measurements
SEL
Sound Exposure Level is the total energy for 1 s
SETUP
Access to parameters by number or key
SLM
Current Sound Pressure Level
STR
Storage registers for parameters and calibration
(0-9)
T.A.
Time Weighted Average and German Takt Maximal
levels
TIME
Date and time last reset or measurement start
TIMER Permits unattended measurements
UWPK
Highest unweighted peak detector output level with
date/time of event
Alpha-Numeric Keyboard Layout
Alpha-numeric keys are available to enter 3 lines for the
Company Name and 1 line for Measurement Title. To enter
company and measurement information:
• Press
Rm02e
• Choose name for reports and enter using alpha-numeric
keypad as shown at left. Note that multiple shift presses are
necessary to enter certain characters
• Press
m
and choose letters for name
• After entering name, press
e d
to move to next line
• Press
m
and enter letter for line 2
• Press
e d
to move to line 3
• Press
m
, enter letters for line 3,
• Press
e d
to move to line 4, and enter the
Measurement Title
• Press
e
(name appears on main screen)
• Press c to return to main screen
Setup Key Functions by Number
• All parameters are accessed through
R
key
• Each parameter is assigned a parameter number
• Press
R
. Press
m
• Enter item # of parameter (820 Manual chap 8) and press
e
. Time, Day, Week, parameters 6-8
• Scroll through parameters using
ud
• Top of parameters list: Press
U
u
• Bottom of Parameter list:
U
d
Setup Key Functions by Key
Major parameters (listed on keypad) are accessed by pressing
R and desired parameter key or by pressing
R
,
U
,
and desired parameter key. For example, to access the interval
parameters, press
RM
.
Lock Parameters
• Access Lock Parameter:
R
U
L P
• Personal password:
m
, enter 1-8 characters,
e
• Lock Options: parameters 28-34
• Unlock system:
U
Lm
enter password,
e
SLM Key Options
Current SLM, Min, Max, Pk, UW, Leq, SEL; Alm Time,
Temp, and serial communications are available by pressing
Cdu
Setup Storage Registers
• Press
U
sd
[repeated
d
cycles through setup stor-
age registers 0 to 9] press
e
to store settings
• Press
U
Rd
[0 to 9]
e
to recall settings
↑
↓
←
→
+
7
8
9
-
4
5
6
t
f
i
h
S
1
2
3
l
e
c
n
a
C
0
.
r
e
t
n
E
%
*
↵
↵
A
B
C
D
E
F
G
H
t
f
i
h
S
I
J
K
l
e
c
n
a
C
L
M
r
e
t
n
E
;
=
r
a
e
l
C
e
c
a
p
S
N
O
P
Q
R
S
T
U
t
f
i
h
S
V
W
X
l
e
c
n
a
C
Y
Z
r
e
t
n
E
&
@
$
\
!
?
<
>
^
/
(
)
t
f
i
h
S
`
"
:
l
e
c
n
a
C
#
,
r
e
t
n
E
Alpha-Numeric Keyboard Layout
Standard Keyboard.
Press
U
once
to
access these charac-
ters.
Press
U
twice
to
access these charac-
ters.
Press
U
three
times to access these
characters.
