UEi Test Instruments AK900SC - Manual (Page 12)

12
R427A R-427A
R428A 52
R434A 45 RS-45
R437A 49
R438A 99
R500 500 500
R502 502 502
R507 50 AZ-50
R508B 95 Suva 95
R600A 600A 600A (Isobutane)
If the "R" prefix is visible, the ASHRAE reference number is being
shown. If "R" prefix is not visible, the number shown is the numeric
portion of the refrigerant's trade name, as shown below. The user
may change the set of names displayed by holding "R-" during
power up.
The unit has been designed for use with modern HCFC and HFC
refrigerants, some of which operate at substantial pressures. The
resolution may be somewhat coarse for work with low-pressure
refrigerants such as R-11 or R-123. Therefore, these refrigerants are
not included with the unit. Contact the manufacturer if you wish to
upgrade your unit to handle these or other refrigerants.
6 Hold Time
These indicators show how often the digital readings are being
updated. The 1SEC indicator shows that it is updated once every
second. The 5SEC indicator means the digits are updated once every
5 seconds. The HOLD indicator means the digits are not being
updated but the bargraph remains dynamic.
7 Low Battery
The indicator will be visible when the battery should be replaced.
Continuing to use the unit when batteries are low will lead to less
accurate measurements.
8 SubCool Temperature
This character of the display is for the subcooling reading, in either °F
or °C. If temperature reading higher than the high-side bubble point
for the selected refrigerant, the SC is negative.