RKI Instruments SC-01 - Manual (Page 29)

SC-01 Operator’s Manual Setup Mode • 24
3. Press and hold the AIR ▼ button. The LCD displays “hold” prompting
you to hold the AIR ▼ button.
4. After a moment, the LCD will indicate “Adj.”. Continue to hold the AIR ▼
button.
5. Release the AIR ▼ button when the LCD displays “RELEASE” in the
upper left corner.
6. The unit will take a few seconds to set the reading to 0 ppm, then
indicate “FINISH” in the upper left corner of the LCD and return to the
AIR CAL Screen.
Performing a Span Adjustment
Entering the SPAN CAL menu item allows you to perform a span
adjustment.
Perform a span adjustment as part of a calibration after performing a fresh
air adjustment. Performing a span adjustment requires the use of a
calibration kit. The procedure below describes a span adjustment using a
calibration kit that includes a calibration gas cylinder, a 0.5 LPLM (liters per
minute) or 0.25 LPM fixed flow regulator with an on/off knob, one of three
different calibration cups, and non-absorbent sample tubing. The required
calibration cup and calibration flow rate will depend on the type of SC-01.
The direction of flow through the cup may also be specified depending on
the cup. See Table 5 below for the calibration cup. Calibration flow rate and
required regulator, and whether the calibration cup flow direction is
specified for the various versions of the SC-01. See “Parts List” on page 38
for available calibration kits and calibration kit spare parts.
AIR CAL
h o l d
AIR CAL
Adj.
RELEASE
Adj.
SPAN CAL