The Calibration Screen
General Operation of RLDS - UI • 49
Connect the sample bag directly to the intake port for
the zone you have set up and allow the RLDS to
sample the entire bag. When sampling is complete,
view the trend data for the zone used to sample
Section 7.8., The Trend Screen
). Read the measured
PPM by placing the cursor on the spikes cause by the
sample. If the bag was large enough for multiple
samples, average the most stable ones.
The new CAL factor is computed by dividing the
known gas value by the measured value. Typically
this value will be between 0.95 and 1.05. This value is
stored in non-volatile memory.
7.9.4. Adjusting Calibration Factor
The factory default CAL factor for standard units is
1.000
. This value may be different if the high
accuracy option is ordered. Proceed as follows to
adjust the current calibration factor:
1. Use the
PREV GAS
or
NEXT GAS
options to
scroll through the list of refrigerants until the
gas you wish to work with is displayed.
2. Select the
CAL FACTOR
option to edit the
value.
3. Use the LEFT/RIGHT cursor keys to move
across the entry field and the UP/DOWN
cursor keys to modify the individual numbers.
4. Press
ENTER
to accept the new entry or
ESC
to revert to the previous setting.
7.9.5. CO
2
Atmospheric
Concentration
(RLDS-CO
2
Units Only)
CO
2
is supported by RLDS-CO
2
units. Because CO
2
is present in ambient air, a relative reading is used to
determine the amount of CO
2
coming from a leak.
The CAL screen offers the ability to enter the
atmospheric CO
2
concentration manually. This value
is typically in a range of 380-400 PPM, however
concentrations may vary slightly based on geographic
locations or other factors (the factory default setting is
386 ppm).
Adjust the ambient CO
2
concentration as follows:
1. From the
SYSTEM SETUP
menu, navigate to
the
CAL
screen.
2. Ensure the
GAS TYPE
setting is selected (see
) and press
ENTER
.
3. CO
2
calibration curve options are displayed.
Simply press
ENTER
to access the ambient
CO
2
concentration setting (PPM IN PURGE).
.
4. Use the UP/DOWN cursor keys to modify the
numbers to set to the appropriate value.
5. Press
ENTER
to accept the new entry or ESC
to revert to the previous setting.
6. After selecting CO
2
as the desired gas and
setting the
CAL FACTOR
, you will be
prompted to enter the CO
2
concentration value.
7. Use the UP/DOWN cursor keys to modify the
numbers to set to the appropriate value.
8. Press
ENTER
to accept the new entry or
ESC
to revert to the previous setting.
NOTE: The CO
2
calibration is a more
complex, 2-point calibration. CO
2
units are
factory calibrated and not intended to be
calibrated in the field. Refer to screens in Section 7.9.5.,
CO2 Atmospheric Concentration (RLDS-CO2 Units
MPORTANT: The ambient CO
2
level is set at
the factory to 386 ppm and will likely not need
to be changed. If, however, the ambient CO
2
concentration at your location is known to be a value
other than this default value, then the instrument’s
ambient CO
2
setting may need to be changed.
Содержание GW-810-3760
Страница 1: ...Refrigerant Leak Detection System RLDS Installation and Operation Manual 026 1309 Rev 11 ...
Страница 37: ...30 RLDS I O Manual 026 1309 Rev 11 Figure 4 22 Connecting the Gateway to the RS485 Network ...
Страница 84: ...Appendix B System Menu Map B 79 Appendix B System Menu Map ...
Страница 85: ...B 80 RLDS I O Manual 026 1309 Rev 11 ...
