14
INVUE GV148 LIQUID CHEMICAL CONCENTRATION MONITOR
User Guide | Entegris, Inc.
SYSTEM TAB
The
System
page allows the user to set and change
variables that affect system operations of the monitor.
This includes concentration outputs, temperature out-
puts, refractive index outputs, and re-zero parameters.
4-20 mA Output Setup
The InVue GV148 liquid concentration monitor can
be used with a 4-20 mA analog device to accurately
interpret signals for concentration, refractive index,
and temperature.
The 4-20 mA analog outputs will allow the end user
to input values beyond the published product specifi-
cations. Inputting such values only affects 4-20 mA
scaling and will not increase or decrease the readable
RI range, temperature, or concentration.
1. Enter the 4 mA and 20 mA value for each output
type.
2. Select “Apply” to send values to monitor.
Re-zero Stability Settings
The GV148 monitor can perform an RI re-zero (see
page 17 for more details). During the re-zero process,
the user can specify the desired RI and temperature
stability values which are measured as 1 standard
deviation of the readings during the re-zero period.
If the RI or temperature deviates more than the user
values, the re-zero result will fail. Recommended
values are 0.00002 nD and 0.01°C.
NOTE: allowing higher and higher instability could indicate
erratic chemical system behavior and could influence the
validity of the final re-zero value.
1. Enter the RI and temperature stability maximum
values
2. Select “Apply” to send values to monitor
Data Logging Using Record Realtime
Record Realtime
records concentration, refractive
index, and fluid temperature values to a {*.csv} file.
1. In the
Quick Access Menu
, select “Record Realtime”
to set the parameters of the data log.
2. Set the duration of the record and sampling
rate to the desired parameters.
3. Assign the file location and file name.
4. Select “Record”.
