CM4 Four-Point Continuous Monitor
CM4 Technical Manual
9-7
9.2.5 Checking Flowrates
Each time you replace a Chemcassette
®
tape, check flowrates while in
the set flow function by comparing the flow readings with the nominal
rates as shown in the set flow function.
To check the flowrates:
1. If necessary, press PROGRAM to exit Monitor Mode.
2. From the 4–SERVICE MENU, choose the subfunction 6–SET
FLOW.
4 – SERVICE MODE
6 – SET FLOW
The display reads:
ADJUST FLOWS TO
180 180 180 180
The initial flows are displayed:
186 168
#
220
$
292
$
In this example, notice that Point 1 is within the correct flow range,
but Points 2,3 and 4 are out of range, as indicated by the arrows. Use
the needle valves on the front panel (see Figure 9-5) to adjust each
point to ± 5% of setpoints.
When Point 2 is corrected, the display shows:
186 178 220
$
292
$
When Point 3 is corrected, the display shows:
186 178 171 292
$
When Point 4 is corrected, the display shows:
186 178 169
#
182
In this example, notice that Point 3 has drifted out of range. The
instrument indicates the condition by displaying the following:
PT 3 OUT OF RANGE
NOTE:
The previous display occurs only when you are exiting SET
FLOW.
ADJUST=1 EXIT=2
Select 1 to correct the out of range condition.
The display shows:
186 178 180 182
All four flows are now correct. Press RESET or ENTER to return to
the Service Menu.
Legend
1
Pt 1 Flow Adjustment
3
Pt 3 Flow Adjustment
2
Pt 2 Flow Adjustment
4
Pt 4 Flow Adjustment
1
2
3
4
1
4
7
2
5
8
0
3
6
9
MONIT
OR
STATUS ALARM
!
LOCA
TION
PROGR
AM
RESET
ENTER
1 2
3 4
4 3
21
1
2
3
4
1
4
7
2
5
8
0
3
6
9
MO
NIT
OR
STA
TUS
ALA
RM
!
LOC
ATIO
N
PRO
GRA
M
RES
ET
ENT
ER
Table and Rack Mount
Wall Mount
Figure 9-5: Point Flow Adjustments
珠海司福斯特科技有限公司
www.safedtech.com
