ENMET EX-5175-EC, Руководство пользователя

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EX-5175-EC
ENMET Corporation
9
5.2.1 Zero Adjust
Zero function is Not applicable for Oxygen sensor/transmitters, go to Section 5.2.2 Gas Span.
A ZERO function should be performed only when the
EX-5175-EC
sensor/transmitter is exposed to fresh air. If the air
at the sensor is in question, use a cylinder of 20.9% oxygen to provide a clean air reference. Attach the cylinder to the
calibration adapter.
Enter the maintenance menu by placing the magnet over
M
ENU switch for 2 to 4 seconds. See Figure 5,
EX-5175-EC
Maintenance Menu flow chart.
The second menu available is the Zero.
Tap the
S
ELECT
switch to perform a Zero.

If the Zero is successful , Cal OK appears on the display and in 1 – 2 seconds, display will change to Span.
If you wish to Span the sensor Tap the
S
ELECT
switch you are now ready to apply gas. Proceed to gas span step 2
If you wish to Exit the maintenance menu, Tap
M
ENU
switch until Exit is displayed, then tap
S
ELECT
switch to
return to the instrument Normal Gas Display

If the Zero is Not successful, sensor is outside of safe parameters to be zeroed, the display will read Bad Zero.
Repeat Section 5.2.1 Zero Adjust making sure to use a cylinder of 20.9% Oxygen.
5.2.2 Gas Span
It is recommended that the Zero Function be performed first.
Enter the maintenance menu. See Figure 5,
EX-5175-EC
Maintenance Menu flow chart.
1.
Tap the
M
ENU switch once to show Span on the display.
2.
Attach the associated calibration gas cylinder to the regulator and calibration cover. See Figure 4 .
3.
Open the valve to apply the calibration gas to the sensor, wait approximately 120 seconds(2 minutes)
4.
Tap the
S
ELECT switch to perform a Span procedure. The display will alternate between the calibration gas
concentration and a signal level.
5.
Watch for the signal level to stabilize. Typical 2 – 4 minutes.
6.
Once the signal level has stabilized, the
EX-5175-EC
will automatically lock in the calibration data and:

If the Span is successful, Cal OK appears on the display momentarily, then advances to Alarm 1. Remove
calibration gas. To exit maintenance menu tap the
M
ENU
switch until Exit appears, then tap the
S
ELECT
switch.

If the sensor is outside of acceptable parameters, Bad Span is displayed momentarily, then returns to Span.
Remove calibration gas. Tap the
M
ENU switch until Exit appears, then tap the
S
ELECT switch. Check span gas
and repeat calibration in 30 – 60 minutes.

If the sensor did not respond to gas, Same mV is displayed momentarily, then returns to Span.

Remove calibration gas, tap the
M
ENU
switch until Exit appears, then tap the
S
ELECT
switch and try
calibration again in 30-60 minutes.
If the sensor will not calibrate See Section 5.4.

N
OTE
:
Some software revisions require the
S
ELECT
switch be tapped to accept the signal.
7.
Calibration is complete.
5.2.3 Exit Maintenance Menu
Exit maintenance, by tapping on the
M
ENU
switch until Exit appears on the display. Tap the
S
ELECT
switch to return
to the instrument Normal Gas Display.
N
OTE
:
You can change the Calibration Gas Level.
H
OLD the magnet over the
S
ELECT switch for 2 – 4 seconds
The
M
ENU switch changes digit indicated by underscore cursor
The
S
ELECT switch locks underscored digit and moves to next digit