23
Operation
2.
Press and hold the
PROG
key. The light on the
PROG
key turns red and all the digits
begin to flash.
3.
Press the
UP
and
DOWN
arrow keys to change the digits to the required value.
Note:
The period will not accept settings exceeding 10 seconds.
4.
Press and hold the
PROG
key to save the new settings and exit the programming
function. The digits will not flash now and the red light on the
PROG
key will turn off.
Note:
The HOLD time is not used in concentration mode.
To sample the MET ONE 237 particle counter for Concentration mode:
1.
Press
RUN/STOP
to start the sampling. The MET ONE 237 particle counter
continuosly takes the sample in the Concentration mode until
RUN/STOP
is pressed.
5.3.4 Beep mode
Beep mode is similar to the Concentration mode. The sampling is continuous, regardless
of the Period and Hold settings and printing is disabled. A single audible sound beeps
once each time a count alarm limit is reached and then once more for every multiple of
the count limit. For example, if the limit is set at 1,000 particles, the beep will sound at
1,000, 2,000, 3,000 and so on. There is only one size channel displayed at a time and a
beep will sound when any particle size range limit is reached. Set the limit for only one
size range of interest and set the remaining size ranges to zero.
Note:
The beep mode limits and count alarm limits are the same.
To change the Beep mode limits:
1.
Press and hold the
SELECT
key until the
CNT
light is lit. The 3-digit display will show
the particle size channel and the 7-digit display will show the count for that size.
2.
Press and hold the
PROG
key. The light on the
PROG
key turns red and the 7-digit
display shows the current alarm limit and the left digit begins to flash.
3.
Press and hold the
SELECT
key until the required digit begins to flash.
4.
Use the
UP
and
DOWN
arrow keys to change the digit to the required value.
5.
Press and hold the
PROG
key to save the new settings and exit the programming
function. The digits will not flash now and the red light on the
PROG
key will turn off.
To sample in the Beep mode:
1.
Press
RUN/STOP
to start sampling. The MET ONE 237 particle counter takes the
sample until
RUN/STOP
is pressed.
5.4 Program the relative humidity and temperature probe (RH/T)
The optional environmental probe may be plugged in to the keyed RH/TEMP connector
on the back of the panel (refer to
). The MET ONE 237 particle
counter will display the relative humidity as a percentage and display the temperature in
degrees Celsius or Fahrenheit. Program the Upper and Lower alarm limits for both
readings. Select the temperature scale to use. Plug in the probe to RH/T connector to
enable the humidity and temperature programming functions. Turn on the counter.
Summary of Contents for MET ONE 237AB
Page 1: ...701076 MET ONE 237AB Particle Detector USER MANUAL June 2008 Edition 5 ...
Page 3: ......
Page 7: ...4 Specifications ...
Page 17: ...14 System Start Up ...
Page 31: ...28 Maintenance ...
Page 37: ...34 Replacement Parts and Accessories ...
Page 38: ...36 ...
Page 40: ...38 ...
Page 48: ...46 ...
Page 54: ...52 Index ...