ENMET MEDAIR 2200 User Manual
Page 28
M
ED
A
IR
2200
ENMET Corporation
25
After entering a valid password to maintenance menu, see Section 5.2.1, the calibration section is the first menu
section; enter by pressing the
SELECT
switch.
Supply sensor with clean air for LowCal/ZeroCal setting and apply calibration gas for HiCal/SpanGas setting.
Press the
SELECT
switch "
Calibration Select XX
" is displayed.
XX
= the gas to be calibrated
Press and
Hold the
OPTION
switch, until the letter F appears in the upper right hand corner of the display. The F
indicates that the instrument is in the Factory Calibration Mode
Press the
OPTION
switch, if needed, to change to the gas to be calibrated.
Press the
SELECT
switch, the gas & current reading are displayed in upper portion of display. The mV reading &
"
LowCal 0
" is displayed in the lower portion of display. This is the LowCal setting,
usually zero, clean air must
be supplied to the sensor. This reading needs to be at or near zero. If it is not then a cylinder of clean 20.9 air
should be used. See Figure 7 if this is required.
Press the
SELECT
switch, that moves the cursor one digit to the right when the last digit is accepted the display
will move to "
HiCal xx
" gas calibration.
xx
= the level of gas to be used for calibration. The mV reading is
shown in the upper right hand corner of the display.
Apply calibration gas to sensor. See Figure 7. After about 1 minute and mV reading has stabilized.
Press the
SELECT
switch, that moves the cursor one digit to the right, when the last digit is accepted and the
calibration is successful the display will momentarily show Cal OK then slope and off set readings, before
returning to the Calibration Menu
Repeat above steps for each channel to be calibrated.
To continue on too next section Press the
OPTION
switch.
Press
OPTION
switch until “Exit maint menu” appears and then press
SELECT
switch to return the instrument to the
Operational Display
Example: Full Calibration Flow Chart, for CO
From Valid Password Entry
N
OTE
:
The dew point sensor/probe can not be calibrated in the field and should be replaced every two years.
O
S
S
Calibration
Select (Gas)
MAINTENANCE MENU
Calibration
O
Press
O
PTION
until the gas to be
Calibrated is displayed
CO: XX
11
LowCal: 0000
S each digit
CO: XX
14
HiCal: 0000
S each digit
Default Calibration Points
Gas
LowCal HiCal
CO
0
20
O2
N/A
20.9
CO
2
0
1000
HC
0
10
O = Press Option
S = Press Select