External flowmeter indicates no flow: Verify that pump is running. Check that the manifold screws are tight and the extension wand connection is tight.
Unit does not respond when keys are pressed: Press and hold all four buttons for five seconds. This will reset the Honeywell
High reading won’t clear: When the sensor is exposed to very high gas concentrations, it takes a relatively long time for the sensor to clear. Leave the unit running in a clean environment for a few hours to clear the sensor. If it doesn’t clear after six hours, the sensor may have been damaged. Contact Honeywell Analytics for a replacement
Unit is in alarm with gas reading of 0 ppm: Check the alarm setpoints and alarm functions as described on page 12. Verify that alarm is not programmed as a downscale alarm, and that the setpoint is above zero.
1.0
.8
.6
.4
.2
LPM AIR
Vent through flowmeter
Bypass Tee
Calibration gas flowmeter
TEST UNIT PRIOR TO USE
OUTLET
INLET
CAUTION
DO NOT BLOCK INLET OR OUTLIET PORTS
Calibration gas bottle
(use only Certified Calibration Gas)
Figure 4. Calibration of the Honeywell
14 | Honeywell |
