Figure 7: calibration adapter, Exit – ENMET SE-5175 User Manual

Page 12

SE-5175

ENMET Corporation

5.1.1 Exit Maintenance Menu

Exit maintenance, when the Exit appears on the display. Press the

ELECT

button to return to the instrument Normal Gas

Display.

Example of Exit menu:

5.2 SE-5175 Maintenance Adjustments

Calibration of the SE-5175

Calibration is the process of setting the instrument up to read accurately when exposed to the target gas. The Zero function sets
the clean air reference point and the Span function sets the sensitivity of the instrument.

Initial Calibration:

Wait 3 – 4 hours after initially supplying power to the

SE-5175

instrument before initial calibration. The

SE-5175

has been precalibrated at the factory, and initial field calibration should result in only fine tuning to circuit, as well as

a way to check that installation is successful. It is not necessary to open the enclosure to make adjustment. The calibration
functions are operated with pushbuttons from outside the enclosure through the

MENU

and

SELECT

switches.

Calibration Zero and Span functions are two separate procedures. They operate independently of each other. It is
recommended that the Zero procedure be done prior to the Span procedure.

OTE

Zero function is not used for Oxygen transmitters.

ENMET

Corporation recommends at least quarterly calibration of the

SE-5175

instrument.

Calibration equipment is available from

ENMET

Corporation to calibrate the

SE-5175

instrument.

•Calibration adapter, a length of tubing with a regulator for the gas cylinder on one end, and a fitting to connect to the

SE-

5175

sensor/transmitter on the other.

•Gas cylinder, Zero gas 20.9% oxygen or Span gas, typical 50% of instrument full scale.

Generally, a cylinder of 20.9% Oxygen is used to provide a Zero point or fresh air reference for the calibration.

Figure 7: Calibration Adapter

Input Port Fitting

Output Port Fitting

Sampling/Calibration Adapter

Select

Exit

ELECT

Press the S

ELECT

button to return to the Normal Gas Display.

ENU

Press the M

ENU

button to cycle through Maintenance Menus