Instructions

UM-0085-B09 DT80 Range User Manual Page 261
RG
Parameter Specifies Units
Default
Value
Range of
Values
Comment
P11
Mains frequency
Hz
50
1 to
10000
Sets analog measurement duration to 1/ P11 seconds .
Set P11 to the local mains frequency for best noise
rejection.
P14
Comms ports password
protection timeout
seconds
600
1 to
30000
When a password is defined, the DT80 automatically
signs off after this period of inactivity (see Password
Protection (P186))
P15
Low-power operation Mode
0
0 to 4
0 = Allow sleep, but not if externally powered or if
Ethernet/ USB is connected
1 = Allow sleep, but not if Ethernet/USB is connected
2 = Do not allow sleep
3 = Allow sleep
4 = Allow sleep, but not if externally powered
See
Controlling Sleep (P300)
P16
LED test mode bitmask
0
0 to 32
0 = normal operation
32 = LCD backlight and all LEDs off
1-31: set specific LED pattern, as follows:
bit 0 set = turn on Power LED
bit 1 set = turn on Attn LED
bit 2 set = turn on Disk LED
bit 3 set = turn on Sample LED
bit 4 set = turn on backlight
P17
Delay to low-power mode seconds
30
1 to
30000
Sets how long the DT80 waits before entering low-power
sleep mode after the last communication or key press
P20
LCD backlight control mode
2
0 to 3
0 = backlight off always
1 = backlight on always
2 = backlight on for P17 seconds after last user activity
e.g. key press
3 = if externally powered: backlight on always; if battery
powered: as for P20=2
P21
Analog subsystem power mode
0
0 to 1
0 = analog subsystem powered during analog
measurement only
1 = analog subsystem always powered
P22
Data delimiter character ASCII
32
(space)
1 to 255
In free format mode with units disabled (
/h/u
), this
character is inserted between the data value and the
next data value
P24
Scan delimiter character ASCII
13
(CR)
1 to 255
In free format mode with units disabled (/h/u), this
character is inserted at the end of each schedule's data.
Note that CR characters are always followed by LF.
P26
Flow control timeout seconds
60
0 to
30000
If the DT80 has been prevented from returning data for
this amount of time (e.g. due to XOFF received or CTS
not active) then it will assume that the host computer is
no longer connected and will discard subsequent output
text.
Set to 0 to disable this timeout
P27
3HSC input mode mode
0
0 to 3
Clock source for 3HSC counter
0 = 3C terminal
1 = internal 32768Hz signal, count while 3C terminal is
low
2 = 3C terminal, count while 4C terminal is low
3 = internal 1024Hz signal
P28
12V power output mode mode
0
0 to 3
0 = Auto CEM power. If schedule contains any CEM20
channels then 12V is turned on prior to any analog
measurement, then turned off again at the end of the
schedule if no other schedules are due.
1 = 12V on all the time
2 = 12V on all the time including while asleep
3 = manual control of 12V output . CEM20s if used are
assumed to be externally powered.
P31
Date format mode
1
0 to 3
0 = days since 1-Jan-1989
1 = European (DD/MM/YYYY)
2 = North American (MM/DD/YYYY)
3 = ISO (YYYY/MM/DD)
P32
Number of significant digits digits
8
1 to 9
Sets the number of significant digits shown in returned
data or unloaded logged data
P33
Minimum field width characters
0
0 to 80
If non-zero, all data values returned in free format mode
(/h) will be padded with leading spaces so that the total
field width is at least P33 characters.