P
ORTA
C
OUNT
®
Plus Model 8020 Technical Addendum
revised 7-27-2001
TSI Incorporated, St. Paul, Minnesota, USA
13
Copyright © 2001 all rights reserved
PTM0330<cr>
The P
ORTA
C
OUNT
Plus will respond as follows, without changing the mask sample
time:
WPTM0330<cr><lf>
•
If a low battery condition occurs while the P
ORTA
C
OUNT
Plus is in External Control
Mode, the following characters are transmitted just before the unit turns itself off:
Low Battery<cr><lf>
The following table describes each of the available external commands and responses in
detail.
COMMAND
DESCRIPTION
J<cr>
Invoke External Control
This command puts the PORTACOUNT Plus into External Control Mode. All
characters sent are ignored until the first
J
<
cr
> is received.
Response from PORTACOUNT Plus:
OK<cr><lf>
When External Control Mode is invoked, certain parameters are automatically set as
follows:
•
The internal valve is set to OFF. This position forces air to be drawn through the
Sample Tube.
•
The PORTACOUNT Plus Display is cleared.
•
The External Control indicator on the Keypad is turned ON.
•
Count Mode and Fit Test Mode indicators are turned OFF.
•
Continuous transmission of concentration data is enabled as if the
ZE<cr>
command had been received.
G<cr>
Release from External Control
This command puts the PORTACOUNT Plus back into Local Mode so it can be
operated from the keypad.
Response from PORTACOUNT Plus:
G<cr><lf>
Q<cr>
Test to see if N95-Companion is attached
QN<cr><lf>
(Response if N95-Companion IS NOT attached)
QY<cr><lf>
Response if N95-Companion IS attached:
