ENMET GSM-60 User Manual
Page 28
GSM-60
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.
*N
OTE
:
Instruments equipped with an oxygen sensor programmed with a range of 0 to 15% by volume require 99.999 % Nitrogen
(
ENMET
Corporation part number 03295-100) be used for the LowCal/ZeroXCal setting and 5% by volume Oxygen
(
ENMET
part number 03296-050) be used for HiCal/Span setting
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
Default Calibration Points
Gas
LowCal HiCal
CO
0
20
O2
N/A*
20.9*
CO2
0
1000
HC
0
10
O = Press Option
S = Press Select
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