Fieldpiece HG2 - HVAC Guide System Analyzer Uživatelský manuál stáhnout pdf (Strana 4)

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Select the Test

Switch Positions

MEM: Erase a single test, an entire customer’s set of

tests, or all data. MEM also allows you to check

memory status,  rmware version, and communi-

cate with a PC for data transfer.

TIME: Set current time and date for internal clock. All

tests are time stamped and cannot be changed later.

Target Evaporator Exit Temperature: By mea-

suring the return wet bulb and dry bulb, the HVAC

Guide

tester calculates a target evaporator exit

temperature. To ensure that the A/C system has the

proper air ow per tonnage, the actual evaporator

exit temperature must be within ±3°F of the target

evaporator exit temperature as outlined in CA title

24.

Superheat: For a  xed restrictor air conditioning sys-

tem, the HVAC Guide

tester uses the indoor wet

bulb and outside dry bulb to calculate a target su-

perheat and uses the suction line temperature and

pressure to calculate actual superheat.

Subcooling: For a TXV/EXV air conditioning system,

the HVAC Guide

tester uses liquid line tempera-

ture and pressure to calculate actual subcooling. If

the manufacture’s target subcooling is not available,

the HVAC Guide

tester provides a conservative

estimate.

Combustion: For combustion equipment, the HVAC

Guide

tester uses %O

,  ue temperature, primary

temperature and CO ppm to calculate %CO

, % Ex-

cess Air, CO (air free), Net Temperature, Standard

E ciency and Siegert E ciency.

CheckMe!® (model HG2):  is is a more advanced

test for determining the overall state of an air con-

ditioning system.  e CheckMe!® test will give you a

diagnosis of the system in plain English and a list of

potential problems in the system.

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