Enmet EX-5100 Bedienungsanleitung PDF herunterladen (Seite 12)

ENMET Corporation EX-5100 C

OMBUSTIBLE

Calibration:

Calibration of Standard Gases: Calibration of the EX-5100 should be preformed using the target gas unless Methane is

known to be a possible background hazard. Reference Table 2 Standard Span Gas

The EX-5100 was factory calibrated using 50% LEL levels of gases. Other levels, minimal 20% LEL, are acceptable. Contact

ENMET prior to use.

Table 2: EX-5100 Standard Span Gas

Gas Range Alarm 1* Alarm 2* Alarm 3*

Span Calibration Gas Calibration Point

Methane 0 – 100 %LEL 10% LEL 20% LEL 50% LEL 50% LEL Methane 50% LEL Methane

Propane 0 – 100 %LEL 10% LEL 20% LEL 50% LEL 50% LEL Propane 50% LEL Propane

Hydrogen 0 – 100 %LEL 10% LEL 20% LEL 50% LEL 50% LEL Hydrogen 50% LEL Hydrogen

Butane 0 – 100 %LEL 10% LEL 20% LEL 50% LEL 50% LEL Butane 50% LEL Butane

OTE

: These internal sensor/transmitter alarms are independent of the 4-20mA Controller alarm point settings.

AUTION

: If Methane is a possible hazard, calibration should be done using Methane.

Calibration of Non-Standard Gases: The EX-5100 range is 0 – 100% LEL. All Non-Standard gas instruments have been

factory calibrated on LEL of Methane.

Methane is considered to have a coefficient or relative response of 1.00(one). Calibration coefficients relative to Methane have

been generated for over 30 different combustible hydrocarbons and solvents. A partial list of these gases and vapors are listed

in Table 3 Non-Standard Gas. An example of how to use this list of relative response coefficients is shown below.

Example: Acetone coefficient factor is 2.86

20%LEL Methane multiplied by the coefficient of 2.86 = 57

Apply the 20%LEL Methane to the instrument the display should read 57, 57 = 57%LEL Acetone. See Section 5.2.2 Span Gas.

AUTION

: If Methane is a possible hazard, the instrument should be programmed and calibrated for Methane. Calibration

should be done using Methane.

Table 3: Selected EX-5100 Non-Standard Gas

Gas

%LEL

Coefficient

Calibration Gas

%LEL Methane

Display Reads

Acetone 2.6% 2.86 20 57

Isobutane 1.8% 1.82 20 36

n-Butane 1.8% 1.82 20 36

Cyclohexane 1.3% 2.22 20 44

Ethane 3.0% 1.18 40 47

Ethanol 3.3% 2.22 20 44

Ethyl Acetate 2.2% 2.86 20 57

Ethylene 2.7% 1.54 40 62

Hydrogen 4.0% 1.05 50 52

Isopropyl Alcohol (IPA) 2.2% 2.86 20 57

Methanol 6.7% 1.43 40 57

Methyl Ethyl Ketone(MEK) 1.9% 2.86 20 57

n-Pentane 1.4% 2.00 20 40

Propane 2.1% 1.67 40 67

Toluene 1.2% 2.50 20 50

Xylene 1.1% 2.50 20 50

In addition to the established coefficients listed in Table 3 above, ENMET can generate calibration data for most common

combustible gases and vapors for which a sample can be readily obtained.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 18

Kommentare zu diesen Handbüchern

Keine Kommentare

Enmet EX-5100 Bedienungsanleitung Seite 12

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Messgeräte Enmet EX-5100